Claim: Acceleration in sea level rise ‘worse than we thought’

However, other analyses show the opposite

Correcting estimates of sea level rise

Acceleration in sea level rise far larger than initially thought

From Harvard University, where you can’t tell them much…

The acceleration in global sea level from the 20th century to the last two decades has been significantly larger than scientists previously thought, according to a new Harvard study.

The study, co-authored by Carling Hay, a post-doctoral fellow in the Department of Earth and Planetary Sciences (EPS), and Eric Morrow, a recent PhD graduate of EPS, shows that previous estimates of global sea-level rise from 1900-1990 had been over-estimated by as much as 30 percent. The report, however, confirms previous estimates of sea-level change since 1990, suggesting that the rate of sea-level change is increasing more quickly than previously believed. The new work is described in a January 14 paper published in Nature.

“What this paper shows is that sea-level acceleration over the past century has been greater than had been estimated by others,” Morrow said. “It’s a larger problem than we initially thought.”

“Scientists now believe that most of the world’s ice sheets and mountain glaciers are melting in response to rising temperatures.” Hay added. “Melting ice sheets cause global mean sea level to rise. Understanding this contribution is critical in a warming world.”

Previous estimates had placed sea-level rise at between 1.5 and 1.8 millimeters annually over the 20th century. Hay and Morrow, however, suggest that from 1901 until 1990, the figure was closer to 1.2 millimeters per year. But everyone agrees that global sea level has risen by about 3 millimeters annually since that time, and so the new study points to a larger acceleration in global sea level.

“Another concern with this is that many efforts to project sea-level change into the future use estimates of sea level over the time period from 1900 to 1990,” Morrow said. “If we’ve been over-estimating the sea-level change during that period, it means that these models are not calibrated appropriately, and that calls into question the accuracy of projections out to the end of the 21st century.”

To obtain their improved estimate of 20th century global sea level, Hay and Morrow approached the challenge of estimating sea-level rise from a completely new perspective.

Typically, Hay said, estimates of sea-level rise are created by dividing the world’s oceans into sub-regions, and gathering records from tide gauges – essentially yard-sticks used to measure ocean tides – from each area. Using records that contain the most complete data, researchers average them together to create estimates of sea level for each region, then average those rates together to create a global estimate.

“But these simple averages aren’t representative of a true global mean value” Hay explained. “Tide gauges are located along coasts, therefore large areas of the ocean aren’t being included in these estimates. And the records that do exist commonly have large gaps.”

“Part of the problem is related to the sparsity of these records, even along the coastlines,” Morrow said. “It wasn’t until the 1950s that there began to be more global coverage of these observations, and earlier estimates of global mean sea-level change across the 20th century were biased by that sparsity.”

“We know the sea level is changing for a variety of reasons,” Hay said. “There are ongoing effects due to the last ice age, heating and expansion of the ocean due to global warming, changes in ocean circulation, and present-day melting of land-ice, all of which result in unique patterns of sea-level change. These processes combine to produce the observed global mean sea-level rise.”

The new estimates developed by Hay and Morrow grew out of a separate project aimed at modeling the physics that underpin sea-level “fingerprints” – explainer from previous story.

“What we were interested in – and remain interested in – was whether we can detect the sea-level fingerprints we predicted in our computer simulations in sea-level records,” Morrow said. “Using a global set of observations, our goal has been to infer how individual ice sheets are contributing to global sea-level rise.”

The challenge, Hay said, is that doing so requires working with a “very noisy, sparse records.”

“We have to account for ice age signals, and we have to understand how ocean circulation patterns are changing and how thermal expansion is contributing to both regional patterns and the global mean,” she explained. “We try to correct for all those signals using our simulations and statistical methods, then look at what’s left and see if it fits with the patterns we expect to see from different ice sheets.”

“We are looking at all the available sea-level records and trying to say that Greenland has been melting at this rate, the Arctic at this rate, the Antarctic at this rate, etc.” she continued. “We then sum these contributions and add in the rate that the oceans are changing due to thermal expansion to estimate a rate of global mean sea-level change.”

To their surprise, Hay said, it quickly became clear that previous estimates of sea-level rise over most of the 20th century were too high.

“We expected that we would estimate the individual contributions, and that their sum would get us back to the 1.5 to 1.8 mm per year that other people had predicted,” Hay said. “But the math doesn’t work out that way. Unfortunately, our new lower rate of sea-level rise prior to 1990 means that the sea-level acceleration that resulted in higher rates over the last 20 years is really much larger than anyone thought.”

###

[UPDATE] My sub-oceanic source has sent me a copy of the actual study. Here is the abstract:

Estimating and accounting for twentieth-century global mean sealevel (GMSL) rise is critical to characterizing current and future human-induced sea-level change. Several previous analyses of tide gauge records1–6—employing different methods to accommodate the spatial sparsity and temporal incompleteness of the data and to constrain the geometry of long-term sea-level change—have concluded that GMSL rose over the twentieth century at a mean rate of 1.6 to 1.9 millimetres per year. Efforts to account for this rate by summing estimates of individual contributions from glacier and ice-sheet mass loss, ocean thermal expansion, and changes in land water storage fall significantly short in the period before 19907. The failure to close the budget of GMSL during this period has led to suggestions that several contributions may have been systematically underestimated8. However, the extent to which the limitations of tide gauge analyses have affected estimates of the GMSL rate of change is unclear. Here we revisit estimates of twentieth-centuryGMSL rise using probabilistic techniques9,10 and find a rate of GMSL rise from1901 to 1990 of 1.260.2 millimetres per year (90% confidence interval). Based on individual contributions tabulated in the Fifth Assessment Report7 of the Intergovernmental Panel on Climate Change, this estimate closes the twentieth-century sea-level budget. Our analysis, which combines tide gauge records with physics-based and model-derived geometries of the various contributing signals, also indicates that GMSL rose at a rate of 3.060.7 millimetres per year between 1993 and 2010, consistent with prior estimates from tide gauge records4. The increase in rate relative to the 1901–90 trend is accordingly larger than previously thought; this revision may affect some projections11 of future sea-level rise.

Regards to all,

w.

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344 thoughts on “Claim: Acceleration in sea level rise ‘worse than we thought’

    • It is really, really difficult to measure, but I think we got it now right. And the results are really, really alarming.

      Like, I can’t see the rising in this noisy data, but if I manage to prove it, I’m really alarmed of the rising I could not first see.

      Sigh. And really, they re-measure the old height so that the new height woukd be more alarming.

    • That was my thought too.

      Several previous analyses of tide gauge records employing different methods to accommodate the spatial sparsity and temporal incompleteness of the data … AKA making stuff up

      Here we revisit estimates of twentieth-century GMSL rise using probabilistic techniques … AKA making more stuff up.

      There was an obvious agenda here to prove that the sea level is rising more rapidly now than before. This is politically driven science, Lysenkoism.

      • Actually they’re not Cherubim or Seraphim, they’re Ophanim and our estimates show that they are all getting alarmingly TALLER…. Soon pin heads everywhere will be hidden under hordes/choirs of very tall angels.

        The clothing industry will collapse and people living in the colder regions of the world will freeze to death due to a lack of clothing…..

        It’s worse than we thought ;-)

    • David Johnson
      January 14, 2015 at 12:12 pm

      So not only cooling the past, scientists are now lowering the past!

      B I N G O! This really is climate comedy gold.

      Abstract – 23 February 2011
      Sea-level acceleration based on US tide gauges and extensions of previous global-gauge analyses
      It is essential that investigations continue to address why this worldwide-temperature increase has not produced acceleration of global sea level over the past 100 years, and indeed why global sea level has possibly decelerated for at least the last 80 years.
      http://www.jcronline.org/doi/abs/10.2112/JCOASTRES-D-10-00157.1
      http://www.eike-klima-energie.eu/fileadmin/user_upload/Bilder_Dateien/Puls_Rahmstorf_Mann_Meerespiegel_2000/MSp.J.Coast.Res.2011May.pdf
      ==================

      Abstract – July 2013
      Twentieth-Century Global-Mean Sea Level Rise: Is the Whole Greater than the Sum of the Parts?

      ………..The reconstructions account for the observation that the rate of GMSLR was not much larger during the last 50 years than during the twentieth century as a whole, despite the increasing anthropogenic forcing. Semiempirical methods for projecting GMSLR depend on the existence of a relationship between global climate change and the rate of GMSLR, but the implication of the authors’ closure of the budget is that such a relationship is weak or absent during the twentieth century.
      American Meteorological Society – Volume 26, Issue 13
      http://dx.doi.org/10.1175/JCLI-D-12-00319.1
      ==================

      Abstract – January 2014
      Global sea level trend during 1993–2012
      [Highlights
      GMSL started decelerated rising since 2004 with rising rate 1.8 ± 0.9 mm/yr in 2012.
      Deceleration is due to slowdown of ocean thermal expansion during last decade.
      • Recent ENSO events introduce large uncertainty of long-term trend estimation.]
      … It is found that the GMSL rises with the rate of 3.2 ± 0.4 mm/yr during 1993–2003 and started decelerating since 2004 to a rate of 1.8 ± 0.9 mm/yr in 2012. This deceleration is mainly due to the slowdown of ocean thermal expansion in the Pacific during the last decade, as a part of the Pacific decadal-scale variability, while the land-ice melting is accelerating the rise of the global ocean mass-equivalent sea level….
      http://www.sciencedirect.com/science/article/pii/S0921818113002397

      • We have this from almost a year ago. I think I will go with the consensus. 😉

        Letter To Nature – 23 March 2014
        The rate of sea-level rise
        Present-day sea-level rise is a major indicator of climate change1. Since the early 1990s, sea level rose at a mean rate of ~3.1 mm yr-1 (refs 2, 3). However, over the last decade a slowdown of this rate, of about 30%, has been recorded4, 5, 6, 7, 8. It coincides with a plateau in Earth’s mean surface temperature evolution, known as the recent pause in warming1, 9, 10, 11, 12……
        http://www.nature.com/nclimate/journal/v4/n5/full/nclimate2159.html

    • We must act now on ground water extraction. It’s all for the children. [October 2010] Groundwater abstraction is about “one fourth of the current rate of sea level rise of 3.3 mm per year.”
      http://onlinelibrary.wiley.com/doi/10.1029/2010GL044571/abstract

      [International Groundwater Resources Assessment Centre (IGRAC) – an initiative of UNESCO and WMO]
      2010
      Global groundwater depletion leads to sea level rise
      Large-scale abstraction of groundwater for irrigation of crops leads to a sea level rise of 0.8 mm per year, which is about one fourth of the current rate of sea level rise of 3.3 mm per year.
      http://www.un-igrac.org/publications/422

    • The the president did say that now is the time we begin to lower the seas…he just didn’t tell us that it was the past level of the seas that he meant…pesky details!

    • By lowering the past she claims an acceleration in the rate of sea level rise – despite a bunch of papers saying the opposite (see my above references).

      ….”We’re seeing a significant acceleration in the past few decades,” said study lead author Carling Hay, a geophysical researcher at Harvard University. “It’s concerning for cities along the U.S. East Coast” where water levels are rising even faster than the world average.

      “It’s definitely something that can’t be ignored,” Hay said…..
      http://abcnews.go.com/Technology/wireStory/study-sea-level-rise-accelerating-thought-28223869

      • AQccording to the real experts who looked at sea levels on the East Coast

        Temporal comparisons at five bay stations over two periods, 1944-1975 and 1976-2007, suggest that, while RSL continues to rise at some of the highest rates found along the U.S. Atlantic coast, there is presently no evidence of a statistically significant increase marking an acceleration in RSL rise at any of the five bay stations.

        Present evidence suggests an ASL rise rate of about 1.8 mm/yr in Chesapeake Bay over the 1976-2007 period.

        It is of course rising faster than the world average because of subsidence.

        Subsidence, or the downward movement of the earth’s crust relative to the earth’s center, is particularly evident in the mid-Atlantic section of the U.S. east coast. Engelhart et al. (2009)

        used a geological database of late Holocene sea level indices to estimate subsidence rates of <0.8 mm/yr in Maine increasing to 1.7 mm/yr in Delaware before returning to rates <0.9 mm/yr in the Carolinas.

        https://notalotofpeopleknowthat.wordpress.com/2014/07/29/sea-level-rise-on-the-eastern-seaboard/

  1. I look forward to the standard WUWT protocol:

    1. Respected scientists publish peer-reviewed paper(s) following years of pain-staking fieldwork, research and analysis.
    2. Someone writes contradictory post on WUWT using data culled from the internet and and graphed in home office.
    3. All commenters chime in to engage in mutual congratulation on how much smarter they are than everyone else.

    • Your assumption (1) is faulty. Most often, it is more accurately described as a climate scientists manipulates models until the cry uncle in order to prove his or her pet theory, and gets it pal reviewed into a climate journal. Your (2) is correct, because typically the real world assumptions made in (1) are so obviously wrong any semi-educated high schooler can identify the problem.

      • Usually its 1. torture the input data by carefully applying some nice cherry picks along with infilling and homogenization pre-processing, run some samples, tune the models to expectation, and then run the models on said “dataset”. And then scream Fire at the output garbage.

      • More like, young researchers with little experience in the field construct computer model and use it to “prove” that previous work of respected scientists was wrong. In fairness, the tidal gauge data really is pretty bad. It has poor coverage. And, it lacks reliable estimates of how fast the gauges themselves are rising and sinking due to tectonic forces. But a fair number of people have tried to extract meaningful estimates from what data there is and I see no reason to believe that these guys have a better estimate. I think that the quality of their effort might be greatly improved by changing every “is” and “are” to “might be”. Maybe in a couple of decades we’ll know if their work has merit.

    • 1. One post-doctoral fellow and a recent PhD graduate. And it’s “pains-taking”.
      2. Or the Colorado University Sea Level Research Group, and using their graphics from their data.
      3. Which is what you’ve just tried to do…

      • Who funded the research? Unlikely to be paid for results that contradict the pronouncements of dear leader.

      • L. Ayres says:

        Who funded the research?

        That is always an interesting question, isn’t it?

        That info should be on the front page, above the fold. Every time.

        Money keeps the ‘runaway global warming’ scare alive. Because it certainly isn’t science!

      • Well the original post leaves off two of the authors, here’s the full list:
        Carling C. Hay, Eric Morrow, Robert E. Kopp & Jerry X. Mitrovica

        JXM – Professor of Physics (Geophysics);
        Director & Fellow, Earth Systems Evolution Program, Canadian Institute for Advanced Research
        Harvard Faculty of Arts and Sciences

        Also the source of funding is given in the paper’s Acknowledgment section as normal, here it is:
        “Tide gauge data were provided by PMSL (www.psmsl.org). This work was supported by US National Science Foundation grants ARC-1203414 and ARC-1203415, the New Jersey Sea Grant Consortium and the National Oceanic and Atmospheric Administration (NJSGC project 6410-0012), Rutgers University (R.E.K., C.C.H.), and Harvard University (J.X.M., C.C.H. and E.M.). We thank P. Woodworth for comments on earlier versions of this manuscript.”

    • Sir Harry – This isn’t one of those. There’s no fieldwork, no research and no analysis. Come to think of it, there never has been “one of those”.

    • Point taken, but still, we are talking about very typical alarmism here. It is worse than thought, the results are really difficult to see and yet the ocean is about to inundate Mexico City any second now etc.

    • Sir Harry – where exactly have you seen any actual rise? In areas where there are ferry terminals or areas built close to the oceans, where has the flooding occurred and where have they had to build new ferry terminals? And why are places like the Maldives building spanking new airports close to the ocean if they were worried about the seas rising? The ice is in fine shape and increasing so the models – once again – are wrong. If there was any “painstaking fieldwork” they would have seen that the “rising” was actually subsidence.

      • The weld boathouse has been used by the Harvard crew since 1906. A question for all the Harvard and MIT grads…have the docks been raised to account for all the sea level rise in the last 118 years?

      • Wording quoted directly from the NOAA graphic that Flashman linked to:

        “The variations in sea level trends seen here primarily reflect differences in rates and sources of vertical land motion. “

      • ” including stations consistent with average global sea level rise rate of 1.7-1.8 mm/yr.”

      • Oh Harry….Sir…..Harry…..
        From your link….”Stations illustrated with positive sea level trends (yellow-to-red) are experiencing both global sea level rise, and lowering or sinking of the local land, causing an apparently exaggerated rate of relative sea level rise.”
        “sinking of the local land”!!!!!!!! WOW, who woulda thunk it?!?!

      • Sir Harry, this has been discussed here before. Good god, you cannot use brand new measuring techniques from 1992 and compare it to data “from the last several thousand years”!! What type of accurate data do we have from 5000 b.c.e.? HOW?

        And as a side note, if the NOAA continues to screw with the temperature record, I’m not so sure how much of their information is suitable in the first place.

      • “Since 1992, new methods of satellite altimetry …indicate a rate of rise of 0.12 inches (approx 3mm) per year.”

        From NOAA: Satellite altimeter radar measurements can be combined with precisely known spacecraft orbits to measure sea level on a global basis with unprecedented accuracy. A series of satellite missions that started with TOPEX/Poseidon (T/P) in 1992 and continued with Jason-1 (2001–2013) and Jason-2 (2008–present) estimate global mean sea level every 10 days with an uncertainty of 3–4 mm.
        http://www.star.nesdis.noaa.gov/sod/lsa/SeaLevelRise/

        Is that really a better way to measure SLR?

      • Bunker Hill Jim
        And, why were Billion$ spent on protecting New Orleans ?

        Well, over the years since the disastrous 1927 flood, hundreds of millions were spent on lower Mississippi River levees and flood control. But flood control has been used down there since it was first settled. What WAS different was the utter fraud and utter disregard for the people’s lives and property BY the corrupt democrat local and state officials. THEY misused and corrupted the money that was to be used to repair and upgrade the New Orleans levees and then blamed the Washington (Bush republicans) for THEIR OWN corruption and waste. With the deliberate aid and cooperation of the Washington ABCNNBCBS news media.

      • Harry

        Take a breath, stand back and think a minute about what the paper said. They looked at someone else’s SWAG and inserted their own SWAG. Sorry, but there is no there, there. Let’s be honest, Harry, the kid from Harvard was a legacy admittance and could not tell Daddy he spent all that time on the shores of the Charles River without some accomplishments. Now he can go to Wall Street, work in his Dad’s office and make millions doing what he did for the last few years at Harvard. He will just be substituting financial models for climate models whistling all the way to the bank.

      • Harry,

        Could you please tell us the instruments used to measure sea level rise several thousand years ago. Maybe even explain just who even cared before the rise of the alarmist “cause”.

        Don’t even try a ‘cubit’.

      • eyesonu
        Maybe even explain just who even cared before the rise of the alarmist “cause”.
        Don’t even try a ‘cubit’.

        Relax. Noah was promised that a flood would never again threaten all of humanity. Then again, he got no promises about a “big rock falling from above” nor “a big blast from a nova.” But a flood? Not going to happen on this earth. 8<)

      • What type of accurate data do we have from 5000 b.c.e.? HOW?

        Jake; it was passed down through the descendants of that 32,757 year old survey participant in Lewandowsky’s paper of course.

        Do try and keep up.

    • Is it really worse than:
      respected scientist picks up hypothesis
      Spends years of pain staking effort filtering data and fabricating models that proves hypothesis in a computer.
      Publishes “study”
      Calls it science.

    • you have it wrong. the years of painstaking fieldwork were done by the people that collected the tidal data. they set up the stations, maintained them, and carefully recorded the data.

      then along comes someone with zero invested in the data, hungery to get their name published (publish or perish), and low and behold they say “look, all that data you collected, it is wrong and needs to be adjusted”.

      so they add in an adjustment to the past, that just happens to not only be larger than the signal they are looking for, it co-incidentally confirms what they were looking for. then they anounce a huge press release with lots of publicity like they discovered the cure for cancer, to tell us all that we are all going to die. as if we will live forever if we just stop driving around in cars. and then they call this science.

      the reality, when folks start looking into the papers, there are almost universally worse than we thought. almost without exception the results have not been reproduced, and until they are the papers have little or no scientific value.

      • ” … hen along comes someone with zero invested in the data, hungery to get their name published (publish or perish), and low and behold they say “look, all that data you collected, it is wrong and needs to be adjusted …” ~ ferd berple

        Now there is the god’s honest truth. We have fraudsters lapping up government funding hollering that the data collected before the CO2 hysteria all needs to be “adjusted”. (fudged in other words)

    • You have made a no worthwhile contribution with such a comment. You are nothing but a sneering troll, Flash man.

    • 1. It doesn’t matter who you are. Respected or not (by the way, I don’t respect such ‘scientists’, not a little bit, I despise them). The scientific method does not care how beautiful or respected you are. Nor does it care how much time did you put into your crackpot theory. If it contradicts reality, it is wrong. No amount of respect can change that, even if you worked a million years for that bogus theory of yours.
      2. Actually, it can be even simpler than that. Just show a fallacy in the ‘years of research’, or a contradiction and that’s it. You don’t even need to show that reality is denied. Technically, you don’t even need to use data (culled from internet or not). In this particular case, they used a model which they failed to show it is correct. To show it is correct it would require that time machine I will tell you about later. Google ‘ex falso, quodlibet’ to figure out why I don’t respect such ‘scientists’.
      3. See point one. It doesn’t even matter how smart you are. If it’s wrong, it’s wrong and one’s IQ won’t bend reality to make it right.

      Instead of ‘looking forward’ maybe you should question your pseudo scientists:

      – How do they know that? Did they measure it, or did they actually applied some numerology on some scarce data to show a confirmation bias driven result?
      – If their theory is false, how could you check that? Does it require you to invent a time machine, go back in time and make measurements in the points there aren’t any but they made the numerological guesstimates? Or a simple guesstimate as theirs that show otherwise would suffice?

    • And your pre-emptive and presumptive post is for what reason?
      Did you bring us intelligence? Or did you bring nonsense to make everyone here feel more intelligent?

      The you trot out the typical, not to forget ‘frequent’, troll claims regarding simple troll beliefs about what occurs here on WUWT or Climate Audit or JoNova or Bishop Hill or… yes, the list goes on for sites that you fail to understand.

      Respected scientists? Can you supply direct references for this respect to the alleged scientists?

      “…Carling Hay, a post-doctoral fellow in the Department of Earth and Planetary Sciences (EPS), and Eric Morrow, a recent PhD graduate of EPS…”

      One a post-doc and the other a recent PHD graduate, both with current and future careers in their fields and so desperate to not offend the alarmist persecutors of those who question science as science should be questioned.

      Did you notice where the abstract describes the ‘respected’ as averaging cherry picked regions and then averaging their results together again? Anytime anyone averages averages, especially into a global average, something is wrong.
      Did you also notice that the ‘respected’ never mentioned the adjustments added yearly to the sea level rise, so we must assume they never thought to correct for adjustments. That current 3mm per year sea level rise sounds to me that they’ve mistaken the adjustments for actual data.

      One must also wonder why with advanced radar, laser and satellite telemetry, why they had to bother with averaging averages from their odd cherry picked regional tables? I certainly do.

      I was amused the other day. While perusing the current issue of Gray’s Sporting Journal, I read an article where the author used the name ‘Sir Harry P. Flashman’; i.e. he named his dog ‘Sir Harry P. Flashman’.

      • Everyone knows Sir Harry Flashman was “a scoundrel, a liar, a cheat, a thief, a coward—and oh yes, a toady.” (G M Fraser 1969)

    • Sir, you would benefit from reading essay Pseudo Precision in ebook Blowing Smoke. Only official government plus peer reviewed stuff (some of which is nonsense, just like this new Harvard model using sparse noisy data to rewrite the past observational record). Therein you will learn about the closure problem. (SLR does not equal the sum of ice mass loss plus thermosteric rise.) This new study would make that problem even worse than it already is. Which means the Harvard authors are either undereducated in the topic of SLR, or produced more CAGW alarm overlooking that their model conclusions do not recomcile to the rest of the SLR literature.

    • Gone back on your word, have you Harry? You recently and clearly stated that you would cease and desist with your posts and churlish troll behavior on this site.

    • “””””…..
      Sir Harry Flashman

      January 14, 2015 at 12:17 pm

      I look forward to the standard WUWT protocol:

      1. Respected scientists publish peer-reviewed paper(s) following years of pain-staking fieldwork, research and analysis……”””””

      People with the usual grasp of the English language prefer to say ” pains taking”.

      But maybe you really are referring some other kind of field work and analysis; like Vampire eradication.

    • ….. “following years of pain-staking fieldwork, research and analysis.”

      Where have you been, Flashy?

    • Flashman – Getting through the peer-review process does not make a paper correct.

      Anthony supplied the results of work from academics that were used by the young scientists Hay and Morrow. It does not contradict what they said in regards to how much the sea level is rising since 1992. It shows that the most accurate data has no acceleration signal in it at all.

      Their argument is that that the previous measures, that were not accurate, could be lower so they are sure that it has accelerated. Their conclusion that the difference between the recalculated pre-992 data and now can be interpreted as acceleration is increasing is debatable.

      • And why the acceleration in rate of sea level rise should be observable in the satellite data.

        “The study also shows that the combined rate of ice sheet melting has increased over time and, altogether, Greenland and Antarctica are now losing more than three times as much ice (equivalent to 0.95 mm of sea level rise per year) as they were in the 1990s (equivalent to 0.27 mm of sea level rise per year).”

    • Dear Harry:

      Seems like I remember you getting your head handed to you in WUWT posts a week or so ago. (Sigh) Here we go again.

      So you start off by insulting the entire community.

      Considering warmest claim this “stuff” is all settled science, and no further discussion will be tolerated, it’s amusing to see how frequently prior data has to be “corrected” – 20th century temperatures appear to move down…sea level appears to move down…little ice age disappears. And not by trivial amounts, mind you.

      And you wonder why so many are skeptical. Put simply, we don’t trust you.

    • Estimating the first derivative of a noisy data is always difficult and the result is uncertain. The contribution of esteemed researchers is to build a model, fit it to data, and estimate the derivative from the model. Long live science!

    • I see you’re observing the standard alarmist WUWT comment protocol:

      1) When any research emerges to support alarm, no matter how speculative or shoddy, rush to defend it
      2) Fail to read actual WUWT post, never mind study itself
      3) Make unscientific ad hom arguments having little to nothing to do with study
      4) Preen at how much smarter you are than everyone at WUWT

    • 1. What fieldwork did they do? I saw no mention of that. Instead, they took actual fieldwork done by others and revised it to fit their narrative, using computer models and techniques they invented.

      This is my biggest problem with the state of Climate Science. No one wants to do the comprehensive fieldwork over timescales that are meaningful. Instead their is a rush to judgement to push a political agenda.

    • It may be hard for you to comprehend but not everyone wants to be reinserted into the Matrix.

    • Sir Harry Flashman,you quote,”Respected scientists publish peer-reviewed paper(s) following years of pain-staking fieldwork, research and analysis”.and then they come up with this,

      Measurments to the nearest metre.

    • They do drive by comments on papers they didn’t read.
      Then they whine if you return the favor and do drive by comments on their drive by comments.

      • Steven – have you found a beginner’s stuff, or not yet? ERL – Effective Radiative Level. How high is it in Berkeley now? Does it change with the time of day? With seasons? With a location? What is the temperature there? Can your equations predict the ERL temperature?

        I have been looking forward to your reply since January 5.

      • Mosher

        I can’t believe you can’t see the shallowness of this study. What they said is that they added 2 + 2 and it came up with 5 which they didn’t like, so they just inserted 6 and called it a model with probabilistic dimensions.

      • Steven – have you found a beginner’s stuff, or not yet? ERL – Effective Radiative Level. How high is it in Berkeley now?
        It’s at the height such that the opacity to IR above it is low enough that LWIR escapes to space.

        Does it change with the time of day?
        yes.
        With seasons?
        yes
        With a location?
        Yes.
        What is the temperature there?
        depends on the height silly
        Can your equations predict the ERL temperature?
        yes.

        I have been looking forward to your reply since January 5.

        read more comment less. Talk to a optics expert is you are really interested.

      • “Mosher

        I can’t believe you can’t see the shallowness of this study. What they said is that they added 2 + 2 and it came up with 5 which they didn’t like, so they just inserted 6 and called it a model with probabilistic dimensions.”

        1. Dont comment on papers unless you read them
        2. Then read the papers in the bibliography.
        3. Then see if you can reproduce the results.
        4. Then provide an argument why the approach they use to estimate is worse than other approaches

        do some work.

      • Don’t need to to do all of that, Mosher. I have done my own research in the matter. Its quite simple: consult the data that is genuine and unadulterated.
        In this case it is tidal gauge data. Study this from the stable coasts and you will see that sea level rise is a myth.
        So you see, no need to waste time on junk science when one knows better.
        Some scientist suffer from a chronic inability to reject models that are refuted by the simplest of observations.They never make very good scientists nor teachers.

      • Steven – thank you very much for spending your valuable time to answer beginner’s questions. I am aware of the definition of ERL, which you quote. But you don’t tell me what that basic height central to your theory is. As you know, it is usually said to be 8-10 km. What is the temperature there? Mosher: Depends on the height, silly. I asked you about the height, Steven.

        So you don’t know. Welcome to the club. Beginner’s stuff.

    • I have no idea why we are wasting all those society’s dollars maintaining the 4,000 tide gauges and 1,000 GPS stations.

      The data is effectively useless. It must be adjusted to include an upward trend.

      And it is the same with all those 15,000 temperature monitoring stations. The data needs to be corrected with an upward trend.

      Who do you believe? 20,000 data collectors or 2 global warming promoters (and a Flashman).

      So we got three choices. Quit wasting society’s resources on measuring stations, climate science adjustments or just waste even more of society’s resources by continuing both.

      If we choose Flashman for President, then all would be solved since we would not have any resources to waste in the first place.

    • Sir Harry Flashman
      January 14, 2015 at 12:17 pm

      I look forward to the standard WUWT protocol:
      1. Respected scientists publish peer-reviewed paper(s) following years of pain-staking fieldwork, research and analysis.
      2…………

      I have adhered only to number 1 – here and here.

      It looks like “Carling Hay, a post-doctoral fellow in the Department of Earth and Planetary Sciences (EPS), and Eric Morrow, a recent PhD graduate” have a very slim publications list. But I could be wrong so please Sir Harry give me their publications list from the peer review. I looked hard for Carling Hay but very little. Maybe it’s because she got her PHD in 2012!

      • Well Jimbo, clearly you didn’t even take the trouble to read the abstract of the paper, sloppy work on your part!
        As I posted above the original post leaves off two of the authors, here’s the full list:
        Carling C. Hay, Eric Morrow, Robert E. Kopp & Jerry X. Mitrovica

        JXM – Professor of Physics (Geophysics);
        Director & Fellow, Earth Systems Evolution Program, Canadian Institute for Advanced Research
        Harvard Faculty of Arts and Sciences

      • It’s typical to put the junior authors first and the faculty advisor last.
        Try Google scholar, JXM about 138 entries, REK about 290, CCH 10 entries, EM doesn’t work well because it’s not a unique entry.

      • Phil
        It’s typical to put the junior authors first and the faculty advisor last.

        The Associated Press (AP) describes Carling Hay as the lead author. If they are correct then you too are getting sloppy.

        ….”We’re seeing a significant acceleration in the past few decades,” said study lead author Carling Hay, a geophysical researcher at Harvard University. “It’s concerning for cities along the U.S. East Coast” where water levels are rising even faster than the world average.

        “It’s definitely something that can’t be ignored,” Hay said…..
        Source

        She sees an acceleration AFTER adjusting the past with her model. It’s worse than we thought!

    • Frankly, like a global average temperature, I don’t think a global average sea-rise figure is a meaningful thing to calculate.

      I also would like to see a proper error bar quoted rather than a “90%” confidence level.

    • To Mr Sir Harry Flashman the esteemed

      Perhaps Mr Sir Harry Flashman the esteemed could take the time to respond to individual criticisms of the paper, instead of using an appeal to authority argument, which is no argument at all. In the meantime I will respond to Mr Sir Harry Flashman the esteemed adhominems for no good reason.

      “1. Respected scientists publish peer-reviewed paper(s) following years of pain-staking fieldwork, research and analysis.”

      In one statement you traverse lack of foundation and end up in absurdity. Respected by whom? Years of pain-staking fieldwork? Does field work now include typing on a keyboard?

      “2. Someone writes contradictory post on WUWT using data culled from the internet and and graphed in home office.”

      So? Is Mr Sir Harry Flashman just recently becoming aware of the internet and how it works? Is this something new to him, collaboration and sharing of ideas and data? If so, it is unfortunate.

      “3. All commenters chime in to engage in mutual congratulation on how much smarter they are than everyone else.”

      It’s all relative, anyone standing next to Mr Sir Harry Flashman suddenly looks like a genius.

      • Alx January 15, 2015 at 8:02 am
        To Mr Sir Harry Flashman the esteemed

        Perhaps Mr Sir Harry Flashman the esteemed could take the time to respond to individual criticisms of the paper,

        Perhaps those critics could actually read the paper? Or even the abstract, and get the author list correct.

  2. I think I understand this

    The records for the 20th century are really bad, so we have made up a number that is lower than everyone else’s

    We deducted this from a total we grabbed out of thin air (based on the bad records) and the bit left over was greater than other studies, but fit exactly with the teory we had when we asked for money to do this.

    Please send more study money and we will gaze into the future with it

    • They aren’t saying the records are bad. They are saying they are sparse. The oceans are huge, and tidal records are at a few coastal locations, subject to movement. Everything else has to be estimated to get a global record.

      So the primitive estimate is to say, well, it’s all the same. That’s an assumption, the old one. H&M are saying, we can do better. Based on the observations.

      • Observations? Nick, they infered this result from a model that they themselves says was built for a different purpose, that they themselves said was fed sparse noisy data im order to makemthe model extrapolations. At least read the post and the paper abstract before making such silly disprovable assertions.

      • Gee thanks Nick.

        So no we know you can clean up “sparse data” with nifty computer models.

        Probably easier than cherry picking tree rings.

      • Rud, speaking of reading the paper, I can’t find it in the current weekly issue (Jan 15) of Nature. Am I looking in the wrong place? Was it a full blown article?

      • You only need one tidal gauge if it is on a stable coast. That’s all; just one.
        ================
        Here you are. The highest tide in Vancouver was 47 years ago. The water hasn’t been higher since that day. ANd since record low water occurred 20 years later, this suggests ocean levels are falling.

        VANCOUVER, B.C. 49° 17′ 14″ N 123° 06′ 36″ W
        Historical Extreme High Water in metres(05 December 1967) =5.64
        Historical Extreme Low Water in metres (13 December 1985) =-0.30

        or how about this. Again oceans are falling. (lowest in 2008)

        TOFINO, B.C. 49° 09′ 13″ N 125° 54′ 45″ W
        Historical Extreme High Water in metres(30 November 1951) =4.75
        Historical Extreme Low Water in metres (07 May 2008) =-0.32

        or this. again oceans are falling.

        QUEEN CHARLOTTE, B.C. 53° 15′ 7″ N 132° 04′ 18″ W
        Historical Extreme High Water in metres(11 December 1973) =8.15
        Historical Extreme Low Water in metres (27 May 1998) =-0.51

      • Surely the big new headline to emerge from this “study” is that the researchers have asserted that sea level data gathered to date cannot be relied on to make long term detailed predictions for the future? Ok they then went ahead and made up some figures based on models but don’t all climate scientists do this?.

      • You only need one tidal gauge if it is on a stable coast. That’s all; just one.
        ================
        here is what the US government says about sea level change in Vancouver.

        The mean sea level trend is 0.37 millimeters/year with a 95% confidence
        interval of +/- 0.23 mm/yr based on monthly mean sea level data from
        1910 to 2011 which is equivalent to a change of 0.12 feet in 100 years.

        0.12 feet in 100 years = 1.5 inches in 100 years.

        1.5 inches in 100 years!! ITS WORSE THAN WE THOUGHT!! At this rate we will be underwater in a couple of million years. whatever will we do? where will we go? please send money to help the sea level refugees in canada, payable to ferdberple scam industries inc.

        http://tidesandcurrents.noaa.gov/sltrends/sltrends_global_station.htm?stnid=822-071

      • “Observations? Nick, they infered this result from a model that they themselves says was built for a different purpose, that they themselves said was fed sparse noisy data im order to make the model extrapolations.”

        They fitted a model to observations.
        “Our analysis, which combines tide gauge records with physics-based and model-derived geometries of the various contributing signals…”

        There is no other way to get a global sea level average. There is a huge area of sea, with a few tide gauges on the periphery, which are not consistent. Some estimate has to be made of that vast interior. It was estimated before, it is estimated again. But better.

      • They’re claiming they can do better than sparse measurements, based on a computer model of other processes that are even more sparsely measured.

        It’s an interesting attempt, but I don’t know why anyone would believe this claim, except ideological convenience. If they had claimed to find less recent acceleration, would anyone be discussing this? Or would the climate mafia have given this study cement boots by now?

        Also, as was pointed out elsewhere, no one gives a rat’s ass what happens to the sea level in the middle of the ocean. Tide gauges have policy implications. This is true even where local subsidence is a known problem.

      • Think again, Nick. The only place where sea level change is of conseguence is at the _coast_ and it matters not a whit whether SL fluctuates by a few mm at some place 1267 km NE of PangoPango.

  3. In a Nutshell (for those with little time for recreational reading)

    “Typically, Hay said, estimates of sea-level rise are created by … gathering {data}.”

    ***

    “The new estimates developed by Hay and Morrow grew out … computer simulations.”

    The End.

      • As a graduate of The Great Eastern Technological Institute Upon the Banks of the Charles, I appreciate the comment. However, there are many fine people who’ve graduated from Harvard – I even count some as friends.

      • Fight fiercely Harvard! Fight! Fight! Fight.
        Show them our prowess and skill!…
        …Hurl that spheroid down the field and fight, fight, fight!
        – Tom L

      • Harvard lost all credibility when the MIT hackers “remodeled” the football field by -10% by completely redrawing everything to 100 marks in 90 yards….and noone noticed. It was one of the finest hacks MIT ever pulled.

  4. This is another of the new science memes: present day data is “better” than older data, therefore we adjust data from the past to match our favored present day hypothesis.

    It is hard for an old-school disinterested “just give me the data” scientist to see the wisdom of this approach.

    This is done daily with surface temperatures as well — see https://www.ncdc.noaa.gov/oa/climate/research/ushcn/ — “The full period of record monthly values are re-homogenized whenever the raw database is re-constructed (usually once per day)”.

      • After searching for this ‘essay’–thinking the essay was something weirdly entitled “When Data Isn’t in Blowing Smoke”–I realized it was Rud Istvan’s book, “Blowing Smoke,” available as an e-book on Amazon. I’ve been plowing through some of the essays over the last two hours. Great stuff there for non-scientists like me. Highly recommended for all the lurkers here who are trying to get their bearings on the issues accurately. Judith Curry wrote the intro. She writes

        Istvan’s insightful and incisive writing in “Blowing Smoke” tackles a diverse array of topics related to climate and energy that are highly relevant to the current public debate. His writing is accessible to a public who may not have the inclination, the time, or the ability to dig deep into the literature and emerge with a simple factual ‘big picture’.

        Dead on. You’re being too modest not underscoring what Blowing Smoke is, Mr. Istvan. Not to mention the time lost trying to figure out what the hell you were talking about in your response to Kip Hansen.

      • I was razzing you about the time. There was no edit button to add a ;-) which I forgot so it sounded harsh. This is a really good book. I’m going through the Reykjavik stuff right now. I remember when Steve Goddard was first making his claims two years ago about changes to the USHCN data, and I actually wrote the MSM journalist who had reported it insinuating that Goddard was a conspiracy theorist (can’t remember who, or the org). I asked him why he wasn’t taking Goddard’s claim seriously. The reporter got in touch with Judith Curry and maybe Homewood, but he didn’t contact Goddard. Effing typical. Now, reading your book, I am seeing the extent of what the NCDC did. Changing the global record!

        The NYT should have had a reporter in every state talking to every state meteorologist examining those records. There’s no other word for it: fraud.

  5. I have to admit, these grant writers are the most creative bunch around !!

    So I’m guessing they are sitting at a bar one night and one of these has an epiphany on how to make a straight line turn into a hockey stick. A $1M grant later and bingo, they did it.

    Even though their own commentary indicates there is no real, comprehensive, (believable) data to do it, they plowed on nevertheless and are accurate evidently to the width of a human hair, more or less.

    • They did do one thing right. At the end of their press release they inserted this obligatory phrase “…….is really much larger than anyone thought.” Rumor has it that grant agencies reward 5 Gold Stars and a Milky Way if that phrase is found somewhere in their work.

  6. Something to do with the older tidal gauges under-measuring, as well the measurement was done at noon and not in the morning, Just because the satellites dont agree doesn’t mean they are right

  7. Flashman == comic

    Flashman: ‘following years of pain-staking fieldwork, research and analysis.’

    Paper: “modeling the physics that underpin sea-level “fingerprints”

  8. “Unfortunately, our new lower rate of sea-level rise prior to 1990 means that the sea-level acceleration that resulted in higher rates over the last 20 years is really much larger than anyone thought.”

    Liars! No other word for it. These people can model and weasel anything and everything.

    Three comments:
    1. Harvard University: A once prestigious organization, now a pathetic anti-human, anti-American wasteland.
    2. Carling Hay is a liar.
    3. Eric Morrow is a liar.

    They know that what they have done is dishonest. They know they have distorted the truth. They know they are liars. They have made their bed and now the world knows the kind of twisted leftists they are. (I would have said leftist liars, but that’s repititious.)

  9. The graph shown here (going back only to 1992) with a rise of 3 mm/decade does not disagree with the Hay and Morrow study, which finds the same rise post-1990. Even if you accept the latter “half-curve” slope of 2.5 mm/decade (probably not a good way to treat the data, with an artificial division into two slopes), that is still twice the rate found by Hay and Morrow for the pre-1990 values. I’m not in any way accepting their results, just saying that if you want to audit their work, you will need to focus on their pre-1990 estimates.

    • No. 20 years is long enough to spot acceleration if the measurements are as precise as indicated. It could have only started accelerating 10 years earlier due to fossil fuel use.

  10. “It’s a larger problem than we initially thought.” How much did they initially think they thought – did their thoughts come in waves, or just little ripples?

    • Well, since, despite increasing human CO2 emissions, there has been NO “global warming” of any significance since he was about 6 years old, “recent graduate” Morrow’s brain appears to still be at ebb (in mid-June in the northern hemisphere, to boot)…. which, given the free flow of information during his lifetime, indicates that there is a very thick seawall blocking the tide from advancing up the beach… .

  11. Brace yourself for this big reveal! We just created a model and now realize that all the warming since the last Ice Age occurred in the last ten minutes. I would have shared our model with the world, but my Mom flushed it before I could take a picture.

    Sincerely – carling hay & eric morrow

    • This is not Carling’s first model adjustment.

      Abstract – 19 Jun 2014
      The sea-level fingerprints of ice-sheet collapse during interglacial periods

      Studies of sea level during previous interglacials provide insight into the stability of polar ice sheets in the face of global climate change. Commonly, these studies correct ancient sea-level highstands for the contaminating effect of isostatic adjustment associated with past ice age cycles, and interpret the residuals as being equivalent to the peak eustatic sea level associated with excess melting, relative to present day, of ancient polar ice sheets. However, the collapse of polar ice sheets produces a distinct geometry, or fingerprint, of sea-level change, which must be accounted for to accurately infer peak eustatic sea level from site-specific residual highstands. To explore this issue, we compute fingerprints associated with the collapse of the Greenland Ice Sheet, West Antarctic Ice Sheet, and marine sectors of the East Antarctic Ice Sheet in order to isolate regions that would have been subject to greater-than-eustatic sea-level change for all three cases. These fingerprints are more robust than those associated with modern melting events, when applied to infer eustatic sea level, because: (1) a significant collapse of polar ice sheets reduces the sensitivity of the computed fingerprints to uncertainties in the geometry of the melt regions; and (2) the sea-level signal associated with the collapse will dominate the signal from steric effects. We evaluate these fingerprints at a suite of sites where sea-level records from interglacial marine isotopes stages (MIS) 5e and 11 have been obtained. Using these results, we demonstrate that previously discrepant estimates of peak eustatic sea level during MIS5e based on sea-level markers in Australia and the Seychelles are brought into closer accord.
      http://authors.library.caltech.edu/46354/

  12. The satellite record shows a quite steady rise of 3 mm/yr from about 1993 through August 2014. Tide gauge records show a quite steady rise of about 1.6 mm/yr since the mid 1800’s continuing through the 20th century up to recent times. I know of no reconciliations of the difference between these records.

    • NO, the raw Topex data is shown here

      It gives a rate of 1mm/year.

      Its only after someone “adjusts” it using a reference point that is sinking at 2.3mm/year is added to the result. that a rate od approx. 3mm/year is produced.

    • The logical inference would be that the land is simultaneously rising at 1.4 mm/year, no? I.e. there is a land rise of 1.4 mm/year and a sea level rise of 1.6 mm year, which, from a satellite, gives the ocean the appearance of rising 3.0 mm/year. But since the water is carried up by the rising crust, it only shows 1.6 mm on tide gauges. I have heard that the satellites are calibrated somehow based on the tide gauges, though, so there may be other explanations.

    • There is no tide guage on Earth where the tide guage’s reference can come anywhere near stability that can be used to measure 3 mm over the course of 12 months. What nonsense!

  13. NOAA tidal gages on the west, Gulf, and East coasts show no sea level rise for the past 15-20 years, except where other is local subsidence, as in the Chesapeake Bay area.

    None of these studies pay any attention to such data. Instead, they fabricate a sea level rise via modeling or ” adjusting” satellite altimetry data.
    People like Flash man are deceived by the rent-seekers.

      • Harry

        Did you bother to check that link and the supposed sea level rises?
        New Orleans is going to flood anytime soon. Just like it has been for over a century.
        The light green and blue dots represent less than 3mm/year, the dark blue ones show sea levels receding at -6 to -12 mm per year.
        The yellow dots predominate around the mid-Atlantic where NOAA adjusts sea level rise for land rebound.

        Now have you got any evidence that your respected post doc fellow and recent PHD data torturers are in any way possibly correct??

      • I was responding to a specific assertion that “NOAA tidal gages (sic) on the west, Gulf, and East coasts show no sea level rise for the past 15-20 years,except where other is local subsidence, as in the Chesapeake Bay area.” This is demonstrably false.

        I acknowledge that it’s a little confusing, because elsewhere NOAA says sea level rise globally is about 3 mm annually. http://oceanservice.noaa.gov/facts/sealevel.html

        “Now have you got any evidence that your respected post doc fellow and recent PHD data torturers are in any way possibly correct??”
        The paper is the evidence, though I freely admit insufficient expertise to judge. Have you got proof that’s it’s wrong?

      • SHF (today at 1:28pm): “This is demonstrably false… .”

        Demonstrate it.

        So far, you have provided no evidence, just words which, so far, have proven to be empty of any significant meaning.

      • Harry–Have you looked at the actual specific trendlines for each of the locations on NOAA’s site? Let’s take something close to my home, as one example…San Francisco Bay at Alameda. It’s adjacent to a body of water that comprises, well, a fairly substantial portion of all the water on Earth (the Pacific). Here’s a link to the trendline: http://tidesandcurrents.noaa.gov/sltrends/sltrends_station.shtml?stnid=9414750 Not only does it show ZERO acceleration in the ‘been happening since the Ice Age’ ongoing rise in sea level (whether you drive an SUV or not), but it’s lower today than the 1940 peak and shows no sign of anything catastrophic happening. The northern sites in North America still have glacial rebound and other tectonic influences that are contributing to a ‘relative’ fall in sea levels (see Alaska and Hudson Bay); the Gulf Coast and Chesapeake have major subsidence happening. Please–take a step back and look at the big picture. Look at a bunch of sites. Where is the predicted acceleration? The Hay & Morrow report simply makes me shake my head (and make me sick).

      • Funny I thought Alaska had as much coastline as the rest of the US put together, so its going up in some places and down in others, how horrible.

    • Flash man
      This is a prime example of lying by a government agency. My comment referred to specific gauges, of which there are several score on the various coasts. You must read each gauge to see the truth of my assertion.
      The NOAA is now a political instrument, but for the real tidal data you have to dig deep for each gauge station. I have done this and I know whereof I speak.

      • To reiterate,
        NOAA tide guages show no rise in sea level for the last 15-20 years on stable coasts where there is no subsidence.
        This is shown by individual gauge data.
        Do _not_ rely on charts and figures presented by the NOAA, or you will be deceived.Look at each individual tidal gauge data.

      • Agreed, and I am surprised that NOAA still have this data available (the site-specific trendlines). It looks like they’re trying to get site visitors to accept the oh-so-scary upward arrows ‘at first glance’ and not encourage any deep-diving into the data.

        “You know, I spent 6 hours at the Bay of Fundy one afternoon…saw the sea level drop over 50 feet…Figured the oceans would be empty by now…”

  14. Here is what the canadian west coast tidal records show. The highest tide in Vancouver was 47 years ago.

    VANCOUVER, B.C. 49° 17′ 14″ N 123° 06′ 36″ W
    Historical Extreme High Water in metres(05 December 1967) =5.64
    Historical Extreme Low Water in metres (13 December 1985) =-0.30

  15. You’re all not addressing the main point which is that sea levels are definitely rising due to warming , but what would scientists know ?

    • Frank, a little help to get you back on track:

      The “main point” of this thread is:
      data versus
      computer simulations;

      for example, NOAA tide gauges versus
      no-skill model “trends”.

    • So nicely stated and, if you are a sincere truth seeker Frank, exactly what you are looking for, that I repeat:

      The main point is:

      Harvard model using sparse noisy data to rewrite the past observational record… .

      Rud Istvan today at 1:09pm

    • Sea levels have been rising since the last ice age.

      Old news, bad presentation, horrible math skills, worse data analysis skills. Absolutely nothing is different this century than the last several centuries regarding sea level rise.

      They followed the favored climate team member’s methods; decide results, torture data, graph then torture data and re-graph till desired results appear.

      When data refuses to collaborate there are a raft of terrible climate models that can be used fill out the desired graph with faux data.

      • Since the last glacial, the average rate of sea level rise is 5.7mm pa (IPCC). So an acceleration up to half that is inconsequential.

    • Frank- And you’re missing the even bigger point that even if sea levels are rising at whatever rate, that by no means proves it’s due to AGW.

    • They are claiming an _acceleration_ of see level rise based on numbers that have been adjusted. The _acceleration_ doesn’t seem present in the raw measurements. Therefore the most obvious conclusion _acceleration_ seems to be an artefact of the adjustments.

      Even NOAA accepts that some of the red dots on their maps are due to subsidence. Good luck addressing that by reducing CO2.

  16. In addition to my post above, here’s a little graph I ginned up that illustrates what Colorado University has done with the rate of satellite generated sea level rise over the last ten years or so.

  17. “What this paper shows is that sea-level acceleration over the past century has been greater than had been estimated by others,”

    Maybe. Maybe not. This minority opinion isn’t necessarily right or wrong. All it means is that the science is not settled.

    “It’s a larger problem than we initially thought.”

    Ah, now that’s certainly wrong.
    If it was a problem we would have noticed. As we didn’t notice any particular problem with sea-level rise (our infrastructure adapted without any extra expense save routine renewal)…

    Well, it still isn’t a problem, is it?

  18. So let me get this straight. The hard data, the observational data was not sufficient enough to create an accurate historical record of sea level rise. So instead, they created “fingerprints” in models built for other purposes, then used those model created “fingerprints” to infer how ice sheets are affecting sea level rise. These values are added together with thermal expansion numbers gleaned from other models, and then an estimate is made. I love new science! No more tedious observations having to be made. Just ask a computer to create the values for you.

    • ” I love new science! …Just ask a computer to create the values for you.”

      Hey, it gets the grants and that’s the name of the game.
      And when the “data” is proven wrong, get another grant to study it further.

  19. BTW, everybody knows that from 1992 thru 2003 the current data says the rate of rise was 3.5 mm/yr and from 2004 up to today that rate is only 2.9 mm/yr. Everybody knows that right?

    • Foots loosely with the pause. There are several papers even worse than this new Harvard one (simply laughable) that tried to explain the recent SLR ‘slowdown’ as not pause related. Those were the main objects of derision in essay Pseudo Precision, since they posited things that are utterly impossible after a few moments thought. Fine examples of the corruption of climate science and the failure of ‘pal’ review.

  20. “But everyone agrees that global sea level has risen by about 3 millimeters annually since that time, and so the new study points to a larger acceleration in global sea level.”

    No, everyone doesn’t agree! The tide gauges that showed less than 2 mm/year prior to the satellites still showed less than 2 mm/year during the satellite era. The apples-to-oranges comparisons of the two different methods while hiding this fact was one key thing that convinced me that the “climate establishment” could not be trusted.

    Anyone who thinks we know the altitude of these satellites to within a mm/year so that we can rely on them over the best tide gauges has to be smoking something…

    • The satellite altimetry problem is worse than you portray. The newest, Jason 2, has a design spec local geographic precision of 3.5 cm, and a design instrument drift of 1mm/year. Details and references in essay Pseudo Precision.

      • And furthermore… #(:))

        “The difference between tide gauge data and space based data is over 100% in the left graph, 1.5 mm/yr versus 3.2mm/yr. Of course those who claim that sea level rise is accelerating accept this data without question, but obviously one of the two data sets (or possibly both) is not representative of reality, and {NASA} JPL’s GRASP team aims to fix this problem they have identified:

        TRF {Terrestrial Reference Frame} errors readily manifest as spurious sea level rise accelerations

        …”

        AND

        “The uncertainty is quite clear in Table 1, which has error ranges larger than the data in some cases: {Table 1}”

        https://wattsupwiththat.com/2012/12/03/why-ice-loss-and-sea-level-measurements-via-satellite-and-the-new-shepard-et-al-paper-are-highly-uncertain-at-the-moment/

      • Janice, +10 at least.
        Tide gauges have been (in some, not all) cases corrected for rebound/subsidence (land moves also) by differential GPS, supposedly good to within a mm. (Supposedly.) The land elevation change corrected tide gauges do reconcile to satellite altimetry to within the error of estimate. Which is large in context of this discussion. To the extent that NOAA can be trusted ( which is not very much on temperature records) they have all this out there in the public domain. Just takes effort to find, which I expended writing Pseudo Precision.

      • “but obviously one of the two data sets (or possibly both) is not representative of reality,” –JPL

        Is it obvious? The tide gauges and the satellites are not measuring the same thing. As I’ve said elsewhere, the missing factor is vertical crustal displacement. Be very careful before trying to “correct” data that is “obviously” wrong. It may be that one of your underlying presumptions is what is actually in error. The discrepancy between the tide and satellite data is very intriguing and may ultimately turn out to be highly consequential for geology as well as climatology — unfortunately, for the time being I think the significance has been missed due to the uncritical acceptance of the satellite data as superseding, rather than contrasting with, the tide gauge readings.

  21. Note that the revised long-term estimate of sea level rise estimated from a selected set of tide gauge stations, while lower than the IPCC approved estimates, is within the range of previously published estimates. It also happens to be approximately half of the “official: rate when I first had to give expert evidence on sea level rise in 1984.
    The recent “acceleration” is a consequence of a step change that occurs with the introduction of satellite altimetry data into the analysis be the use of reconstructed GMSL data. Without a reconciliation of the results produced by the different techniques the highlight interpretation is not reliable. The few published and unpublished attempts to better match satellite and tide gauge data produce a lower rate post 1993 than used by this paper.
    It is also well known that there are decadal scale fluctuations in the rate of sea level rise (which vary between the different ocean basins), and that comparison of a short term trend (60 years) is misleading. Particularly at present with good evidence that both satellite and tide gauge rates of sea level rise are decreasing.
    My personal view is that a heavily smoothed global sea level record doesn’t tell us much of practical value for coastal management issues

  22. Well how could those young scientists have ever hope to get a tenure track appointment if they tried to publish a study that concluded SLR was effectively near zero and lost in the tidal data with their statistical methods? Seriously.

    They could have published in the Journal of Null Results. And then gone looking for new employment at McDonald’s. Until the incentive system changes, we will continue to get these kinds of “new age science.”

  23. Harvard is the ne plus ultra training ground of upper level managers in the US Gov’t bureaucracy. Their efforts are directed at maintaining and increasing the power of the Federal Gov’t,, while buttressing their own personal wealth and power- nothing more and nothing less.

  24. Just like any experiment that adds heat in we should add all the heat derived by burning fossil fuel to the supposed base temp and look at the result. We also might try to calculate cubic meters of water extracted from the ground and add it to a base sea level, ya probably not much but it could explain some of the possible rise.

  25. TC in the OC

    January 14, 2015 at 1:04 pm

    The weld boathouse has been used by the Harvard crew since 1906. A question for all the Harvard and MIT grads…have the docks been raised to account for all the sea level rise in the last 118 years?

    This is the test that even a simpleton like Frank can do. Allez-y Frank. We expect the answer tomorrow.

    • There is a damn and lock between the MIT boathouse on the Charles and the harbor – SLR wouldn’t effect the boathouse unless it got REALLY large.

    • The Charles has locks between itself and Boston Harbor to prevent flooding on spring tides. The 1912 lock was replaced in 1978, but not because of SLR. Rowed out of Weld, know these things.

  26. How much ocean rise is due to silting and volcanos , man mad objects and structures and garbage in or floating on the oceans?

    • The big things are plate techtonics and isostatic rebound. U. Colorado models the so called GIA adjustment as +0.3mm/yr. So the oft talked about sayellite era 3.1mm/yr is really only 2.8+/- 0.4 from the perspecive of actual coastlines and tide guages. Details and references in essay Pseudo Precision.

      • Do the satellite altimeters also measure land level rise/fall? If not why not? I have seen measurements of change in glacial height, but rarely of land height itself. The global isostatic adjustment stuff seems to be more theoretical than empirical.

        [The only claimed (widely publicized) isostatic adjustments to date have been under-ice land height adjustments needed to justify the final assumed glacier melt rates. .mod]

  27. When made aware of these latest revelations from “science”, Ms H Penny was observed to suddenly run down the street, crossing repeatedly back and forth across a busy road shouting ” THE SEA IS RISING, THE SEA IS RISING!”

  28. To repeat someone (I forget who, but Josh drew a wonderful cartoon), from a couple of years or so ago – the water’s still only halfway up the duck!

  29. I would think rising temps would increase rainfall from increased evaporation of the oceans and much of that would become groundwater never to be seen again. This would far outweigh the water from a few glaciers especially when they are good and gone. I for one am sick and tired of hearing about glaciers.

  30. If the sea level rise is approx. 3 mm a year, that means a little over an inch every nine years, or less than a foot in a century. What exactly is the big deal? Even if no more sediment comes down from Pennsylvania, I still won’t be able to take my boat across the Susquehanna Flats at low tide.

  31. its not too well known but Colorado University states that their global mean sea level numbers (GMSL) are for purposes of measuring ocean volume and not relative sea levels at the coast…

    “The global mean sea level (GMSL) we estimate is an average over the oceans (limited by the satellite inclination to ± 66 degrees latitude), and it cannot be used to predict relative sea level changes along the coasts”

    “We apply a correction for GIA because we want our sea level time series to reflect purely oceanographic phenomena. In essence, we would like our GMSL time series to be a proxy for ocean water volume changes. This is what is needed for comparisons to global climate models, for example, and other oceanographic datasets.”

    http://sealevel.colorado.edu/content/what-glacial-isostatic-adjustment-gia-and-why-do-you-correct-it

    • That lets them claim a bigger number due to basin expansion (ocean volume is increasing faster than sea level rise because of the basin increase).

      Why anyone would care about ocean volume increase more than sea level rise is one of those questions that is discouraged.

      • The basin expansion is very questionable in any case. The GIA correction is based on the ICE-5G model which is known to be grossly inaccurate for the most important area, Antarctica.

      • Good point.

        Shockingly, they didn’t actually measure the basin expansion. But they have a model! So never mind your tide gauge measurements.

  32. Funny how she hastily mumbles something about tide gauges being along coastlines, then runs away….from the obvious fact that if sea level rise were to become a problem, it would be along those same coastlines…and that the tide gauges show no alarming rate. Funny, huh?

    • Hilarious — not!

      (but, your witty writing about your good point made me chuckle)

      So! Had any good arguments with AGWers down at the gym lately?

      Go, (genuine) Meteorologist MacGuire!

      • I mean (oh BROTHER!)!! Mike BROMLEY (not Mike M.)! Stay safe, over there.

        Yes, I will try to be more careful from now on.

    • A piece in Nature concluded there was no detectable acceleration trend since 1930.

      http://www.nature.com/ncomms/2014/140414/ncomms4635/full/ncomms4635.html

      For the period 1930–2009, none of the 12 records has an acceleration significantly different from zero (except Brest), in general agreement with results from the controversial study of Houston and Dean21. The acceleration at Brest is different from Newlyn, despite their close proximity, and may appear significantly different from zero because of a data gap in the 1940s

      • There was nothing “controversial” about Houston and Dean, except that it offended the biases of a few alarmists. Objectively it was a rock solid study.

      • Nice. You quote one line from the Nature piece you link to, relevant to a specific technique only and against which they offer a strict caveat in the next paragrapah. In fact, their conclusion is precisely the opposite of what you claim:
        “there is substantial evidence, in both GMSL data sets2, 24 and coastal averaged sea level time series (corrected for internal variability27), for the existence and significance of a sustained increase in the rate of sea level rise over the 20th century and early part of the 21st century. In addition, the magnitude of the acceleration currently being observed is consistent with the latest understanding of sea level budgets45 and since about 1990 cannot be explained solely as part of internal variability44.”

      • Harry — Of course they say that, they don’t want to be blacklisted. But no acceleration since 1930 is problematic for alarmists irrespective of any caveats.

        The caveats are sort of pointless anyway, since even their analysis says statistically significant accelerations irrespective of chosen start dates won’t even be detectable until the 2020s.

      • Note the part of the summary you left off:

        “The public and policy makers might prefer to see evidence of a significant acceleration in their local tide gauge records. However, our results clearly show that it could be several decades before the acceleration detection methods considered here reveal (in a statistically significant sense to 95% confidence) such a discernable acceleration in individual tide gauge records. This is due mainly to the considerable interannual to multidecadal variability evident in sea level at a local scale, and our inability to account fully for all of it at present. Our results imply that if/when the currently understood components of the variability in the records are removed, then accelerations significantly different from zero are likely to become detectable in individual tide gauge records later this decade or early next decade, using the methods considered here.”

        So, in other words, we really have no idea whether GMSL is accelerating, and won’t for some time. But the current IPCC models can’t be ruled out (shockingly).

  33. I wonder how this discussion would look if the whole “CO2 is pollution vs CO2 is not a big problem” unspoken agenda was gone.

    • Me too, but global warming has left the building and CO2 is up 10% over The Pause with no discernible radiative forcing, and we have daily infusions of crap science making it into the popular press so, I’m hypothesizing it is not about science, good or bad, at all. It is fodder and I’m pretty sure I don’t even have to bother testing that hypothesis – hey they don’t.

    • Yes, because without the implied link to “it is our fault because we emit so much CO2” it is doubtful things like this would garner much attention at all.

  34. How much would the level increase be from JUST the depletion/use of the water stored in the various continental aquifers, e.g., the Ogallala Aquifer in the Western US and the Florida peninsula which have dropped hundreds of feet and tens of feet respectively?

    • Globally negligible. World is a big place. Land Aquifers hundreds of feet deep have little impact on oceans miles deep covering 79% of the planet.
      97% of the world’s water is the oceans. 2% is icecaps and glaciers. Everything else, rivers, lakes, aquifers is 1% (well actually according to USGS just 0.9%). See my ebook Gaia’s Limits for explanations of the profound consequences, including specific discussion of the Ogallala and South Florida aquifers.
      See essay Pseudo Precision in ebook Blowing Smoke for a debunking of the groundwater storage idea used by ‘climate scientists’ to explain the recent possible ‘SLR slowdown’.
      Regards to someone who is thinking.

  35. “”“We are looking at all the available sea-level records and trying to say that Greenland has been melting at this rate, the Arctic at this rate, the Antarctic at this rate, etc.” she continued. “We then sum these contributions and add in the rate that the oceans are changing due to thermal expansion to estimate a rate of global mean sea-level change.””

    So we have no data on the thickness of any of the ice sheets before 1990 that is of much use. We have no empirical measurements of any rates of melt before 1990 so we take this almost complete lack of data and put it into a model and it does not come out to the same as the tide gauge data. We therefore throw up our arms in amazement and declare that the work of all previous scientists is completely wrong and we have to rush out and buy waders before 2150 or we will all get cold knees. Where do they get these twits from. Is there some kind of Harvard selection process that only scouts the local pig farms?

  36. Have they EVER said “this is less than we thought and not as big a problem as we thought”?

    Of course not. There’s no grant money for anything like that.

  37. I’m still trying to understand why a sea level rise of less than one foot per century is considered a problem, yet alone a “bigger problem than we thought”. Can anyone explain?

    • Because if you aren’t kept in a constant state of alarm about the monster under the bed, you won’t clamor for government to do something about it and willingly give up your freedoms.

  38. Darned oceans! They are not rising fast enough, based on direct measurements. Therefore, we will TELL those pesky oceans they are rising at the politically correct rate.

  39. I’m not sure why anyone would think it’s easier or more accurate to use the sparse tide gauge measurements than the nonexistent ice sheet melting measurements.

    Oh wait, you have a computer model for that. Please continue while I stick my fingers in my ears and yell obscenities for unrelated reasons (sorry, it’s a programmer thing).

    • No need to apologize!

      We understand!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

      (If it weren’t that my two German Shepherds take EVERY-thing to heart and make it deeply personal, I would, too!)

  40. You’ll be surprised to learn that sea level could be determined by planetary orbits …

    A plot of the scalar sum of the angular momentum of the Sun and all the planets is shown here.

    In the above linked website that plot is derived solely from planetary orbits. There is a very strong correlation between world temperature data and the 934-year and superimposed 60-year cycles in this plot. I postulate that magnetic fields from the planets affect the Sun and cosmic ray intensities, and the latter can affect cloud formation and thus climate on Earth.

    The whole debate lies firmly within the science of physics in which I am well versed. Most people don’t understand thermodynamics, let alone radiative heat transfers. I have written about the latter in my paper “Radiated Energy and the Second Law of Thermodynamics” published on several websites in March 2012 and easily found with Google. That paper demolishes the false conjecture by James Hansen that back radiation can be added to solar radiation when calculating surface temperatures using the Stefan Boltzmann equation. All it can do is slow that portion of surface cooling which is itself by radiation, whilst having no effect on most of the cooling, which is not by radiation.

    But the more important issue is the physics (based on the Second Law of Thermodynamics) which does explain all temperature data in tropospheres, surfaces, crusts, mantles and cores of all planets and satellite moons, and also explains the required energy flows to maintain the existing temperatures. Very, very few are aware of this physics, yet it is valid and correctly derived from the laws of physics which have stood the test of time.

    Unless we attack the false physics in the greenhouse conjecture and present valid physics that does gel with reality, we don’t have a hope of quashing the hoax.

    I believe we can present the correct physics, and such is in my book “Why It’s Not Carbon Dioxide After All” available from Amazon. If we don’t satisfy the world that the physics in the GH conjecture is false, and that other correct physics does explain everything, then there will be more of the same when the 60 year cycle rises again between about 2028 and 2059.

    Hopefully Australia can lead the world, for I believe there could be a class-action sponsored by major companies against the Government for all the costs which such companies incur because of the false claims regarding carbon dioxide. If the Government lost such a case they would be forced to act and take notice of the correct science, and it would get global attention. I am confident that I could defeat any scientist the Government might use as a witness in such a case. Many of you will know that I have argued with hundreds on climate blogs and never been proven wrong regarding the content of my book. I’ve even offered $5,000 if proven wrong.

    So, if anyone has any suggestions, or knows someone in an Australian law firm who may wish to take this on, let me know.

    • Why.It’s.Not.C02 January 14, 2015 at 3:05 pm ……….
      You’ll be surprised to learn that sea level could be determined by planetary orbits …

      A plot of the scalar sum of the angular momentum of the Sun and all the planets is shown here.

      You need to stay off substances.

  41. I suggest you all google Sir Harry Flashman. If you have not read the books, please do so. Witty stuff.

  42. “”Mike Bromley the Kurd
    January 14, 2015 at 2:14 pm
    Funny how she hastily mumbles something about tide gauges being along coastlines, then runs away….from the obvious fact that if sea level rise were to become a problem, it would be along those same coastlines…””

    She probably reckons that if the sea level in the Ocean rises far enough it will come further up the sides of the ships and eventually pour in and sink them…….

    • lol. (GRIN — no grin) You’re right. Mm, hm. She worked it all out in the bathtub with a model.

  43. Complete NOAA analysis of all available data from 2005 to 2012 shows 1 mm per year.
    http://hockeyschtick.blogspot.com/2012/12/noaa-2012-report-finds-sea-levels.html
    has link to NOAA paper published in 2012.

    Reading the full paper shows SLR from 2005 to 2012 measured by GRACE and JASON satellites at 1 mm per year. The amount of error in the analysis is about +/- 1 mm per year.

    Plenty of photos from 19th century of the Statue of Liberty or foundations of the Brooklyn bridge. Compare those photos with the same view today and I can see no SLR. Even if the average SLR were 2 mm per year, the total SLR in the last 150 years amounts to 300 mm. Thats 1 foot. Tides in NY harbor have a typical full range of 5 feet on any given day. I doubt anyone looking at NY harbor will notice.

    • Great point, bw.

      There are far more damaging storms on the horizon — Social Security, Public Pensions, Medicare, Medicaid, College Loan Default, Spiralling National Debt, etc. These events are real, not modeled, and unavoidable. They will impact future generations far more than a few millimeters of sea level rise.

      • “There are far more damaging storms on the horizon ”

        Like O’s third term?
        Martial law is the trump card, and who are his pals? Just sayin’

      • Paul January 14, 2015 at 5:13 pm
        “There are far more damaging storms on the horizon ”

        Like O’s third term?
        Martial law is the trump card, and who are his pals? Just sayin’

        I never mentioned any of those things. Hyperbole much? Ridiculous? Strawman?

        I never mentioned Obama, his pals, or an Obama third therm.

        You are delusional.

    • I take it you’re unaware of this event:
      “Both Liberty and Ellis Islands were largely submerged by the storm surge from Hurricane Sandy, which made landfall on the evening of October 28, 2012. Liberty Island reopened on July 4, 2013. The Ellis Island Immigration Museum reopened on October 28, 2013, although it remains a work in progress. Elevator access is available to the Great Hall on the second floor and the exhibit spaces on the third floor. Because of the storm, most of the museum collection is currently stored in a climate-controlled facility in Maryland.”
      http://www.nps.gov/stli/after-hurricane-sandy.htm

      • No secret that NYC harbor and area are subsiding, Phil. Have been ever since when. And so are we to be alarmed about sea level rise because of this?
        Or perhaps you mean that we should be alarmed over tropical storms.
        Please clarify.

  44. Highly interesting. In 2008 Chao, Yu, and Li reported in Science (April 11th) that sea level rise had been linear for the previous 80 years and the slope of the rise was 2.46 millimeters per year. Their value was corrected for water held in storage by all reservoirs built since 1900. I of course sent an article in correcting Gore’s 20 foot rise prediction, both to Science and to Nature, and got thrown out without even a pretense at peer review. You report an overall trend of 3.0 +/- 0.04 millimeters a year which is very close to the value these guys reported in 2008, seven years ago. I am not sure how much difference correction for water held in storage would amount to. But as I said then, something that has been linear for 80 years is not about to change anytime soon.And that is basically what these data show.

    • Arno, the Colorado/ NOAA number 3.1 contains a 0.3 GIA model adjustment. The actual NOAA shoreline rise is 2.8+/- 0.4. In other words, agreement with you and your cited paper within error of estimate.

      • Interesting that the Hay paper takes no account of GIA. It boggles the mind that they think a rough and sloppy estimate can be taken as gospel while actual measurements are dismissed.

  45. “1. Respected scientists publish peer-reviewed paper(s) following years of pain-staking fieldwork, research and analysis.”

    And as Ivor Ward alluded to, telling all other scientists that have spent hundreds if not thousands of years on the same subject that they are wrong while your respected scientists were using either incredibly naïve or dishonest logic||

    Flashman – No sir. You sir are not a Sir, just a troll.

  46. “1. Respected scientists publish peer-reviewed paper(s) following years of pain-staking fieldwork, research and analysis.”

    And as Ivor Ward alluded to, telling all other scientists that have spent hundreds if not thousands of years on the same subject that they are wrong while your respected scientists were using either incredibly naïve or dishonest logic||

    Flashman – No sir. You sir are not a Sir, just a troll.

  47. Clearly another case of don’t believe your lying eyes; instead you should believe the data we derived from our models and estimates even though they don’t agree with what your lying eyes are telling you.

  48. Seeing as that NOAA has cooled the past, the oceans can only have reacted by contracting … I think I’ve made the eureka discovery of the new fabricated lower sea levels.

    • Until a real scientist comes along…

      I just read the story you linked to, Mr. Haldane. Thank you for sharing (ugh). For me, it boiled down to this:

      “Methane, … is the second largest contributor to anthropogenic climate change.

      *** “… The gas and oil boom in the U.S. may be increasing methane emissions. Our airborne measurements will improve quantification of these sources.”

      Conclusion:

      Envirostalin1sts “investing” $30 million of money they don’t have
      (National Debt currently around $18 trillion)
      to come up with an excuse to tax
      (for a return of far more than $30 million)
      those who risk their own capital to make a profit
      (this time, in petroleum production).

      *********************

      On the face of it, given its underlying premise, its raison d’ etre,is an unsupported assumption that human CO2 emissions can do anything to alter the climate zones of the earth, it is a bogus “study”

      which IGNORES DATA: per SCIAMACHY satellites, high CO2 values, i.e., big CO2 sources are not in industrialized nor highly populated regions (they are in the Amazon basin, tropical Africa, and SE Asia).

  49. Nils Axel Morner put out a paper dated July 4, 2013 about sea level measurements. Part of the abstract says “The methodology applied and the views claimed by the IPCC are challenged. For the last 40-50 years strong observational facts indicate virtually stable sea level conditions. ”
    And “Best estimates for future sea level changes up to the year 2100 are in the range of +5 cm ±15 cm.”
    http://multi-science.metapress.com/content/q7j3kk0128292225/?p=1e6aa26ee2a94c7a9a6d9a3939896d95&pi=13
    I’ve been going to the same beach for 40 years, they say sea level has risen almost 4 inches over that time, but I don’t notice any difference. You could just as easily convince me sea level is dropping from what I’ve seen.

  50. “We know the sea level is changing for a variety of reasons,” Hay said. “There are ongoing effects due to the last ice age, heating and expansion of the ocean due to global warming, changes in ocean circulation, and present-day melting of land-ice, all of which result in unique patterns of sea-level change. These processes combine to produce the observed global mean sea-level rise.”

    A major reason for the sea level rise, that this study seems to have overlooked, might be runoff from a new swine farming regulation requiring porcine showers be installed in all facilities.

    • Add those showers to the new regulations covering chickens and I see why my bacon and eggs breakfast is costing more. :)

      [No, bacon costs more because are now required to get regular showers … Which also requires more water. .mod]

  51. Your copy of the abstract starts out with the sentence “Estimating and accounting for twentieth-century global mean sealevel (GMSL) rise is critical to characterizing current and future human-induced sea-level change.” The only human induced sea-level change is the tonnage of shipping that we float on the ocean. While global warming should cause sea-level change that has nothing to do with mankind.

    A simple plot of temperature and CO2 concentration against time at a monthly or finer scale reveals an obvious annual cyclic variation in both variables. Linear regression applied to incremental changes in both temperature and CO2 concentration does not produce a significant correlation but cross-correlation reveals that the CO2 concentration lags the temperature by a few months. This is the well known seasonal life cycle which produces a major part of our food supply.

    Temperature rises in Spring and Summer causing life forms to flourish with an accompanying take up of CO2, i.e. concentration decreases. Then in Autumn and Winter the temperature falls causing the demise of the life forms and a corresponding release of CO2 leading to an increase in concentration. This is the complete reverse of the proposition by the IPCC that increased CO2 concentration causes temperature to rise. Here the annual rise and fall of the temperature causes a fall and then a rise in the CO2 concentration.

    Take away the season variations and one is left with a simple slope for CO2 which slope gradually increases with time. The current rate of increase of CO2 concentration is roughly four times the rate when measurement began yet the temperature has remained stable for the past 18 years. This fact does not get a mention by the IPCC.

    Apply linear regression to the annual differences in CO2 concentration and the average temperature for those periods and there is a statistically significant correlation. A check of the annual increments for each of these variables also provides a statistically significant correlation. Clearly temperature sets the rate of change of CO2 which possibly emanates from perennial life forms and sea-water.

    Conclusion: Temperature drives the atmospheric concentration of CO2. If there is a so-called greenhouse effect, it is too small to be detected in current measurements and is not likely to influence sea-level.

  52. I found the entire post totally confusing.
    There was no reference in the post that I could see where the first set of graphs was discussed….that set clearly shows the rate of rise decreasing”..but no one discusses that.
    Then the two discussions go on a convoluted circular argument and both are saying that the rate of rise is increasing….
    This is one of the most un satisfying posts I have read on your web site. I normally find the stuff fairly readable…….not this time. It doesmnt make any point.

  53. There are roughly 540,000 miles of coastline right now.
    That’s 870,000,000 meters. (More or less.)

    Engineering Geology – Page 143 – Google Books Result
    https://books.google.com/books?isbn=0080469523

    Fine sand     =  1-3  deg slope => avg = 2.0
    Medium sand   =  3-5  deg slope => avg = 4.0
    Coarse sand   =  5-9  deg slope => avg = 7.0
    Fine gravel   =  9-12 deg slope => avg = 10.5
    Medium gravel = 12-17 deg slope => avg = 14.5
    Coarse gravel = 17-24 deg slope => avg = 20.5
    Bare rock = 90 degree slope => avg = 90
    

    For an “average” coastline, beach slope – which IS after all, what they are worried about, right? is going to vary as shown above by type of sand or gravel. It is, after all, that actual “land” at the ocean front that is being covered right now as “sea level rises” and causes international catastrophes and death to millions, right? ( Well, at least more deaths than artificially restricting energy worldwide occuring to their theories.) The rest – where FL or Pakistan or India gets flooded is only exaggerations and propaganda.

    So, If sea level goes “up” by 1.0 meter, then each section of beach at each different slope increases the volume of the ocean total, right? Assume for arguments sake, that each type of shore line above is 1/7 of the total.

    Then, if a fine sand beach has a 2 deg slope, then a 1.0 meter rise in sea level = 1.0 m/tan(2 deg) = 28.6 meters of “new” ocean area that had to be flooded by the “new” water.

    new “volume” of water that was required for this part of total shoreline =
    1/2 x L_new_shore x ht x W_new_shore = 1/2 x 1/7 of 870 x 10^6 m x 28.6 m x 1 m = 1777 x 10^6 m^3

    Repeat for the remaining 124 x 10^6 meters of shoreline for each of the other slopes.

    Slope	tan(deg)	SL_Rise	L_Shore	New_Vol (m^3)
    2	0.035	        1.0	28.6	1,779,538,597
    4	0.070	        1.0	14.3  	  888,684,260
    7	0.123	        1.0	8.1	  506,112,957
    10.5	0.185	        1.0	5.4	  335,292,853
    14.5	0.259	        1.0	3.9	  240,288,599
    20.5	0.374	        1.0	2.7	  166,208,621
    90	1.63246E+16	1	0	  0
    			         	3,916,125,888
    

    Hmmmn. 3,916 x 10^6 “extra” cubic meters of “extra” ocean to fill up if the oceans rise 1.0 meter = 3.916 x 10^9 m^3

    Greenland is supposedly losing 200 cubic kilometers per year.
    200 x 10^3 x 10^3 x 10^3 meters = 2.0 x10^11 m^3 /year

    Nope, not enough to reduce the sea level rise sufficiently. Good to think about though, isn’t it?

    • You made a good start. The stage vs. storage relationship in the ocean basin is called the “hypsographic curve” which can be looked up. Note that the dry coastline granular material contains interstitial pores which must be filled or saturated before a rise manifests itself. The porosity issue was investigated some years ago in “Sea-Level Change”, Studies in Geophysics, National Research Council, 1990. Table 2 on Page 12 gives pore space and sea-level equivalent. For coastal plains and shelves, the pore space is equivalent to 1.7 meters. I interpret that to be 1.7 meters of sea level rise equivalent drawn into filling the empty pore space.

  54. It is something fishy!!! Some areas rising, some areas show falling and majority of the areas no change. Also, localized human action including extension of urbanization influencing the sea level change. Drilling for oil, gas & water, natural disasters like Earthquakes & Volcanoes in the sea, tectonic movement of seabed, etc. Without looking in to all these aspects showing a curve with beautiful increase is unrealistic. Also, lumping all these in to one is not scientifically valid.

    Dr. S. Jeevananda Reddy

    • The local shore elevation in several areas has been substantially RAISED by re-injecting ground water below the shore. Baytown TX, for example, raised several areas by as much as 6-8 feet when those neighborhoods were flooded out after the ground water was pumped out. Japan stopped completely local subsidence by controlling ground water pumping, as did Louisiana and FL and parts of the Philippines and Taiwan.

      So, pump back in seawater below the threatened areas. But only in the threatened areas where underground/underwater conditions are right.

  55. And today’s headline, worldwide, reads: The sea is rising faster than we thought, experts say. That is as far as most readers will dig into the story, though I doubt for those who choose to read the article that there will be a link to the full text, let alone the abstract.

    • For beaches like this picture, where the beach is flat and high and low tides really swing the water line, if sea level has risen 8 inches over the last 100 years like they say then this beach would have looked A LOT different 100 years ago.

  56. This is a significantly larger rate than the sea-level rise averaged over the last several thousand years.

    Who told you the sea-level rises at a steady average speed? Seas go up, seas go down. A decade of above average rise does not impress.

    And, in the end, the rise counts only where people live, not in the middle of ocean, which satellites measure.

    This paper expresses speed of rise to a precision of 100 nanometers. That is less than the wavelength of visible light. No error estimate given. I am impressed.

  57. “But these simple averages aren’t representative of a true global mean value”

    This is truly bizarre. Why would anyone care about their abstract global mean value when the only thing that is potentially important is measuring sea level rise around coastlines?

  58. If increases in sea levels are accelerating faster than anyone thought, it should become apparent in just a few years because “acceleration” implies an ever-increasing rate. It cannot help but become unequivocal soon, unless there is a “pause” in sea-level rise. Then they’ll have to explain the pause. But any claims that the sea-level rise is hiding in the deep oceans won’t cut it this time.

  59. “Here we revisit estimates of twentieth-century GMSL rise using probabilistic techniques9,10 and find a rate of GMSL rise from 1901 to 1990 of 1.260.2 millimetres per year (90% confidence interval). ”

    90% confidence interval? It’s been quite a few decades since my last stats class but as I recall that’s basically the description of a totally meaningless result. And BTW, what the Hell is 1.260.2 millimetres exactly?

    http://www.osdpd.noaa.gov/ml/ocean/J2_handbook_v1-3_no_rev.pdf

    OSTM/Jason-2 Products Handbook

    2.3.1. Accuracy of Sea-level Measurements
    Generally speaking OSTM/Jason-2 has been specified based on the Jason-1 state of the art,
    including improvements in payload technology, data processing and algorithms or ancillary data
    (e.g: precise orbit determination and meteorological model accuracy). The sea-surface height shall
    be provided with a globally averaged RMS accuracy of 3.4 cm (1 sigma), or better, assuming 1
    second averages.

  60. though not a scientist a bit of simple “high school logic” counters this claim:

    a little thought about TOPEX/JASON vs tidal gauges: the satellites measure the whole sea and thus the overall sea level rise very accurately. ways more accurate then tidal gauges. Now comes the logic:

    it is logic that satellites can measure an acceleration if the preceeding data are tidal gauges..Why?

    tidal gauges are land based, region based: put all the tidal gauges in alaska and in scandinavia and the “global sea level would fall (measurements are taken in region with isostatic uplift from the last glacial)

    put it in Greece and the sea level would rise faster then the satellites measure (Greece “sinks or subsides)

    the satelite measurement is the real “right measurement” but only starts in 1990

    this implies using standard logic:

    1 you only can speak of satellite data since 1990 All the data from tidal gauges are deemed incorrect compared to this different type of measurement Thus the satellite data can only speak for 1990-present
    This data however covers only a short time and shows no real acceleration. However logically speaking for warmist logic: 25 years of data is for such a statement too little; we need at least a double timespan to see if this is real
    2 plotting the satellite data after the tidal gauge data (even if it is adapted) is measuring apples and then suddenly follow it up by measuring bigger pears and say “the apples became bigger” Does tidal gauge measurements follow the satellite measurements? No even here on WUWT this has already been shown with plenty of tidal gauge data.
    3 Of course we know why this discrepancy between tidal gauge and satellite measurements exist: tidal gauges are exposed to land changes (beach erosion,subsidence, isostatic uplift, coastal earthquakes,….) while satellite records are not.

    now comes the conclusion with a fictional very exaggerated what if example to illustrate the point i try to make by using simple logic:

    Isn’t the tidal gauge data the “real real life situation data”? in my opinion, though maybe not scientifically correct, it does correlate more correctly to real life situation, the tidal gauge data would show what happens on your coastline. so in real life for isostatic rebound regions the sea level is “dropping”, for subsiding regions the sea level is “rising faster”. this even if the satellite mesurements show a general rise.

    the exaggerated what if example: if your region has an uplift of 1 meter (1 yard) a year in a few years your port would be dry and have to move to the new waterline, if your region subsides 1 meter (1 yard) a year you got every few years a “Noah’s flood” even if the satellites measure only a rise of 3 mm a year, it is not what these regions are experiencing.

    In short: when the IPCC claims that coastal regions will be flooded then it is more important to look at what tidal gauges are telling you in these regions. they show what’s really going on in that region.

    this illustrates my thought about sea levels: even if the satellite measurements are superior to the older mesurement method, it does not always say what is really happening.

  61. To be honest, as soon as I saw “Harvard” I switched off. What a sad state one of the previously most respected educational establishments in the world has come to that almost everything that emanates from it these days is utter garbage. I was going to try to get my daughter in there, but it looks like it will be Oxford or Cambridge now.

  62. When this alarmist climate warming pack of cards comes crashing down will anyone believe real scientists ever again.

  63. Why always discuss without seeing ?
    Here is what is available about sea level since 1700. Of course more recent data is better, so what! For centennial climate change we have to work with what we have.

    Note the rise around 1800, for about 30 years it was fast, and this was before the industrial era.
    Note in green the swinging rate of change, amazingly with a period close to that of oceanic multi-decadal oscillations.
    And yes, apparently recent satellite observations seem to show a faster rate of rise, but they are recent and we have to wait centuries to know what are the variabilities due to things that we don’t understand.
    Short term thinking and climate are like oil and water, they don’t mix.
    see also: http://climate.mr-int.ch/index.php?option=com_content&view=article&id=40&Itemid=442

  64. Does anyone have the polynomial equation for the fit to the blue curve in the figure at the top (from Colorado.edu)? What is the quadratic term of the SLR deceleration?

      • Thanks. If SLR is 2-3 mm/yr, that suggests we have 100-150 years before SLR overturns. This may signify the start of the Holocene interglacial at that time.

  65. It hasn’t been long since the U. Colorado Boulder folks had to add a significant “fudge factor” to their sea level readings in order to account for a decline in the rate of absolute sea level rise they were measuring and restore it to its previous rate. As I recall, they attributed that rate decline to “depression of the sea beds caused by the increased weight of additional sea water”. I yowled at the time that in so doing they were mislabeling “volume” as “level” and that they had no rational basis for calculating that convenient fudge factor in any event.

    Am I now being told that sea level rate of rise was INCREASING DURING THAT PERIOD when the U.C. Bolder folks thought it was declining?

  66. Sir Harry Flashman
    January 14, 2015 at 12:17 pm
    I look forward to the standard WUWT protocol:
    1. Respected scientists publish peer-reviewed paper(s) following years of pain-staking fieldwork, research and analysis……

    Is that 3 years or less of post doc work for Carling Hay? Would that be 2 years or less for “Eric Morrow, a recent PhD graduate of EPS”?

    Carling Hay
    Experience
    Postdoctoral Fellow
    Harvard University
    June 2012 – Present (2 years 8 months)

    • Analyzed 20th century sea level records using a modified multi-model Kalman smother estimate the individual melt contributions to present day rates of sea-level rise.
    • Supervised an undergraduate student in a year long project.
    https://www.linkedin.com/pub/carling-hay/7b/937/447

    I don’t like pointing to experience or qualifications but YOU have forced me to look into it. You brought it up after all. What should matter is if someone’s evidence is right or wrong.

  67. Facts and figures on sea level rise

    Those that allege that climate change poses an imminent threat often cite rising sea level and/or its indirect effects. Rising sea level is, of course, said to result from rising global temperatures caused by man-made emissions of carbon dioxide and other gases. This article will present some facts and figures relating to the specific claims regarding sea level rise.

    The scientific facts regarding climate change in general should be pointed out. The global warming hypothesis claims that man-made emissions of carbon dioxide and other gases have caused global temperature to increase in the 20th century and will cause further increase in the 21st century, with abundant negative side effects. This hypothesis is not supported by scientific observations. The 20th century temperature increases largely occurred prior to the largest increase in atmospheric carbon dioxide. The widely-acclaimed temperature increases in the 1980s and 1990s most likely are flawed readings affected by urban heat-island effects: independent atmospheric readings show relatively constant global temperatures for the past 50 years. Despite claims to the contrary, a majority of scientists (both in general and in fields related to atmospheric physics) do not accept the global warming hypothesis as fact.

    Even though the claims of future sea level rise hinge on this hypothesis, examination of these claims is useful to clarifying some popular misconceptions.

    The United Nations International Panel on Climate Change is an international group of scientists, politicians, and others which have met several times, each time producing a “consensus” statement regarding predictions and proposed responses regarding climate change. The last few statements are tied to the Kyoto Protocol treaty, which would selectively restrict carbon dioxide emissions and other activities. The politicized nature of this “scientific” conference has been addressed by others; what follows are its claims regarding sea level rise.

    The IPCC’s 2001 report predicted that global average sea level will rise by 10 to 80 centimeters (median estimate 48 centimeters) by the year 2100. This will result from thermal expansion of ocean waters, net melting of glaciers, and net melting of polar icecaps. Predicted consequences include coastal flooding, incursion of salt water into coastal freshwater supplies, and a host of other effects. It might also be noted that environmental organizations have extended these predictions. For example, the UCS and ESA predicted sea level increases of up to 1 meter along the US Gulf Coast by combining IPCC predictions with ground subsistence projections. By combining well-established effects with highly questionable predictions, they prevent straightforward testing of their predictions.

    There are 28,700,000 cubic kilometers of icecaps and glaciers in the world. This includes grounded ice in Antarctica and Greenland; floating ice shelves in the Arctic Ocean and seas near Antarctica; and glaciers in various mountain regions of the world. This represents the remaining unmelted ice from the last ice age, when total ice volume was about 3 times greater and when world sea levels were about 120 meters lower.

    Calving of icebergs from floating ice sheets is periodically cited as an indicator of “climate change.” Regardless of the cause, even the complete melting of the ice sheets would have no effect on sea level. This is a consequence of Archimedes’ principle of buoyancy. The mass of floating ice (above and below water both) is identical to the mass of the water displaced. If the ice melts into water, its density decreases but is mass is the same, and water level is unchanged. [Yes, I know, I know, you have heard it all before but the climate hysterics should have yet another opportunity to get their facts straight.] There are potential side effects to large scale melting of ice sheets. One is a decreased reflectivity of the Earth’s surface; due to clouds and low sunlight angles near the poles the consequences are minimized. Another is a change in ocean currents in the Arctic Ocean.

    Those that express concern over an increase in sea level make the implicit assumption that the current stability in sea level is normal. Currently the Earth is exiting a period of glaciation. Rising sea level has been the norm for the last 20,000 years, not the exception. The average rate of sea level rise in this period was 60 centimeters per century.

    Consider the following: in the IPCC’s predictions, 20% of the expected sea level rise over the next century is due to net melting of continental ice (outside Greenland and Antarctica). This would require that 20% of the Earth’s continental ice melt in the next century. This ice is the remnant of the ice cover from the last ice age; what remains is 0.4% of the ice cover at the last peak of glaciation. On one hand, for this ice to melt in the next century would involve a rate of melting only one-fourth of the average over the last 20,000 years. Probably more relevant is the fact that this ice has apparently been hard to melt.

    Limited data suggests that around the mid 1800s the rate of sea level rise increased to about 15 centimeters per century. This rate has apparently remained constant for the past 150 years; various tidal gauge measurements over a 20-year period give results comparable to this rate. While some suggest a link between this and current man-made carbon dioxide emissions, note the following: the observations suggest a constant rate of sea level rise for the past 150 years, while rate of man-made carbon dioxide emissions has increased over 100-fold. Additionally, most of the cumulative rise in sea level preceded the majority of cumulative carbon dioxide emissions. Global temperature change and sea level rise do correlate with each other, but not with human activities; thus it appears that both temperature and sea level are changing principally due to natural phenomena.

    Note that there are uncertainties even with these modern measurements of sea level change. Tide gauge measurements for the past 150 years show rising sea level at some locations and dropping sea level at others. The primary factor is sinking and rising of the ground, respectively. The 15cm per century sea level rise incorporates model-based adjustments for these ground motions. Parts of Europe and North America are still rising in adjustment to the removal of the ice sheets by melting over the past several thousand years. Some sources question the accuracy of these sea level rise rates because of limits in our understanding of this isostatic rebound.

    The IPCC predictions heavily depend on models that have limitations. It is first necessary to model global climate change; these models make assumptions regarding future increases in atmospheric carbon dioxide and proceed to model global and regional changes in temperature, precipitation, and other climatic factors. Models of sea level rise use these results and further model mass-balance for the icecaps (considering precipitation and melting) and thermal expansion of the oceans (requiring modeling of changes in temperature-depth relations for the global oceans). These models involve a high degree of uncertainty. The models for temperature change fail miserably to predict temperature changes for the last 35 years, yet their predictions for the next 100 years are still assumed valid. Nearly all the models require “fudge” factors to correctly simulate a steady state situation. The fact that the various models cited by the IPCC give relatively consistent predictions does not reflect reliability; the models have been “adjusted” to conform to each other, but fail to conform to real-world observations. When regional climate changes are considered, the models give inconsistent and sometimes dramatically contradictory results. Further, the models are modeling global carbon dioxide balance, which is very poorly understood at this time. Sea-level change models likewise attempt to model icecap mass balance, also poorly constrained by current observations.

    file storage

    http://www.filedropper.com/ratesofsealevelrises

    • The United Nations International Panel on Climate Change is an international group of scientists, politicians, and others which have met several times”.

      Make that”Intergovernmental”. (IGPOCC)

  68. People don’t read articles. We simply need to figure out how to write “Climate alarmists full of shit” as many different ways as possible in 144 characters. Yeah, stoops to their level but we’re right they’re wrong.

    • You make a compelling argument. On the other hand, I’m right and you’re wrong. Check and mate!

  69. Oh noes! In twenty years the water has risen from under my foot level almost up to my ankle! Whatever shall we do?

  70. Many commenters not happy with this. I wonder why.

    Is is problematic that according to this estimate the sealevelrise the last century is smaller than other estimates?

    Is it problematic that this estimate shows more sealevelrise and acceleleration during warming periods? Like the thirties. And less sealevel rise during periods with less temperature rise. And close to no rise in sealevel during periods with no warming.

    What is the problem?

  71. Notice the Abstracts states:
    “Estimating and accounting for twentieth-century global mean sealevel (GMSL) rise is critical to characterizing current and future human-induced sea-level change.”
    Implicitly their goal is to prove a point, not to get the metric correct for its own sake.

  72. One thing has been overlooked here – the exponential rise in Global Warming Drivel (GWD). Suppose GWD doubles every year. Start with 1000 liters or 1 cu meter of GWD. Since doubling every year means an increase of 1000 every 10 years, after 30 years the 1 cu m of GWD will have increased to 1 cu km. After 40 years we will have a 1 sq km x 10km deep volume. After 70 years we will have 1 billion square km x 10 km deep of GWD -NOAA’s great flood! We are all going to drown in GWD – NOAA needs more money to build NOAA’s Ark! :-)
    You could do the same calculation with US Government regulations or the Federal debt.

    • Or with your mortgage, compound interest, which is also exponential. Fortunately interest rates are only ~4%, so the annual multiple is ~1.04. Reducto ad absurdum doesn’t work in this case.

  73. Same Old Story

    Measured sea level rise isnt alarming so we must ignore and trust a computer model

    As the French would say – Merde

    • Seems like your take on this is that a smaller rise the last 100 years is more alarming.

      What would the French say to that?

  74. Here’s a purely pragmatic, and possibly naive view:

    Forget about global sea level rise for a moment. It really doesn’t mean anything except as an indicator. The threat is local so we should be considering local implications.

    Looking at this graph in isolation:

    http://tidesandcurrents.noaa.gov/sltrends/sltrends_global_station.htm?stnid=822-071

    There is a clear 30cm rise above the trend in the late 1990s. Was there disastrous flooding in Vancouver that year? Was a single square metre of usable land lost to the sea? I’ve not been able to find anything that suggest there was a marine inundation. The threat seems to be from rain rather than seawater flooding. If not, we know that at that location we have at least 30cm of headroom. So eyeballing the trend line consider that between 1900 and 2000 we have a trend of about 3cm/century. Which gives us a millennium until the trend reaches the levels we know are not disastrous. So this could be treated as a long term threat and monitored and adapted to as technology develops.

    The numbers in Texas (Galveston Pleasure Pier) give a different picture.

    http://tidesandcurrents.noaa.gov/sltrends/sltrends_station.shtml?stnid=8771510

    Using a similar approach to the Vancouver numbers the known headroom is less than 15cm based on the 2010 peak, This could be eaten up in 20 years based on the 2000-2020 part of the trend line. Starting to adapt now might be a good idea. They could do worse than look at the Low Countries where they have been living with the threat of inundation for a hundreds of years.

    http://news.bbc.co.uk/1/hi/sci/tech/8362147.stm

    For some islands the picture might be worse and one form of adapting might be to stop building waterfront properties and importing tons of concrete to do it.

    http://www.factfish.com/statistic-country/maldives/tiles+and+flagstones+of+cement,+concrete,+artificial+stones,+import+value

    That’s a lot of investment for islands that will be uninhabitable in 15 years. Unless all that concrete is going into sea walls of course. I can’t seem to find out. The see defences mentioned here are not imported but made from local sand.

    http://news.bbc.co.uk/1/hi/world/south_asia/7946072.stm

    Disclaimers:

    * I can’t look at other locations right now.
    * All the numbers are eyeballed from a small graph, I’m supposed to be working ;)
    * The trend line does not take into account spikes which might take the headroom away in a sudden and unpredictable way.
    * This is based on not losing usable land to the sea. It might be that the local geography can limit the losses.

    • Old Man: concerning the Galveston data, the trend of the past 15 years is nearly flat, contrasted with the previous trend, which is much steeper. This change in the trend reflects subsidence and counter measures taken to arrest subsidence.
      The Harris/Galveston Subsidence District was established in the nineties to address this problem and have restricted ground water withdrawel to good effect in Galveston.
      Other Gulf Coast tidal guages show a flat trend except at Grande Isle, La., which is subsiding and shows a rising sea level.

  75. “The past not only changed, but changed continuously.” ~George Orwell 1984~

    The leftist/progressive/Marxists in society believe in moral relativism…that “the ends justify the means”, thus any act, including lying, cheating, stealing, and even killing, is perfectly justified if it is done to advance the agenda; to achieve the desired end. The so-called climate scientist who change the past in order to advance the man-made global warming/climate change agenda are only acting/lying to advance the agenda, so in their mind it is perfectly acceptable behavior, in fact it is expected of ‘true believers’.

  76. FWIW, the chart Willis tacked on is for satellite data whereas Hay & Morrow work with tidal gauge data. There are actually two independent sets of satellite data — Topex/Poseidon which shows roughly 3.3mm/year with (IHMO optimistically) small estimated error margins and GOES which showed 2 mm/yr with large error margins due largely to uncertainties in ionospheric delay modeling. Tidal gauge data is not great but it seems to show around 2mm/yr. Going from memory the First IPCC assessment report (pre satellite) acknowledged that nothing adds up and the second said there had been progress. I am going off to download and read the third/fourth/fifth reports. Doubt I’ll be back any time soon because reading and digesting sections of the assessment reports is slow work

  77. The warming that’s not happening is melting ice sheets and glaciers at an increasing rate. Trenberth’s missing heat has been found! The freezing point of water must be an inverse function of atmospheric CO2 concentration. If we continue to burn fossil fuels we may freeze ourselves to death with the same mechanism we use, (with NaCl) to produce home made ice cream.

    We need to spend hundreds of billions to model this. The gravy train is back on track!

  78. Their criticism of determining global sea level using tide gauges is valid. While extremely useful regionally there are issues with the process when determining a “global sea level”. But someone probably should not throw stones who live in glass houses. Their method is worse, because it is conjecture that they built a model for, and nothing else.

    Modeled conjectures is not proof or determinate of anything unless validated. Their claim that previous sea level rise was overestimated is an absurd claim. The most they can claim is they have an alternate theory and more time, work and validation is required to see if it has value. That this paper passed peer review, and Nature magazine publishes it, is troubling since it supports the odd truism of climate science: “if you can model it, it must be true”.

  79. “We try to correct for all those signals using our simulations”

    Yes, let’s throw away all those carefully recorded measurements and use our computer simulations instead.

  80. From the paper:
    “The KS methodology is divided into four steps, the first three of which are repeated by employing the spatial fields of GIA and ocean dynamic models from all possible combinations of 161 different Earth rheological models and 6 global climate model (GCM) simulations from CMIP5”

    But they don’t just use the KS method, they use the GPR method as well!:
    “the GPR approach employs Gaussian process priors for the GIA and ocean dynamics contributions that are estimated, respectively, from the 161 GIA model predictions and 6 GCM outputs”

    So they have two independent methods, one using GCMs and the other using GCMs.

  81. On ocean calamities.

    Nature News – 14 January 2015
    Ocean ‘calamities’ oversold, say researchers
    Team calls for more scepticism in marine research.
    …..Carlos Duarte, a marine biologist at the University of Western Australia in Perth, and his colleagues say that gloomy media reports about ocean issues such as invasive species and coral die-offs are not always based on actual observations. It is not just journalists who are to blame, they maintain: the marine research community “may not have remained sufficiently sceptical” on the topic……

    Many experiments are based on “worst-case scenarios”, they say, and claims that calciferous organisms are already declining may relate not to carbon emissions, but to other oceanic processes…..
    http://www.nature.com/news/ocean-calamities-oversold-say-researchers-1.16714

  82. Ivy league colleges seem to be producing second-rate science these days and this one clearly followed the handbook.

    Global warming dogma 101: Exaggerate current measurements, decrease past measurements, and repeat this data molestation every few years.

  83. So stupid for warmies to keep going over this endlessly (like the temp pause), when it’s plainly obvious there’s no acceleration. Same steady, slow rate as at the end of the last glacial melt, what, last 6000 yrs?

    Time to defund about 90% of these stupid “studies”.

  84. Global warming dogma 101: Exaggerate current measurements, decrease past measurements, and repeat this data molestation every few years.

    So, when temps were increasing in the earlier part of the century sea level was rising slowly and now that temps are stationary, sea levels are rising more rapidly? I gotta tell you, even if they are right, I think that’s going to be a tough sell right across the idealogical spectrum.

    • It’s the eternal catch-22 of alarmism: they have to make the current temperatures unprecedented, but they also have to promise that all the DOOOOOM! is in the future, because it’s clearly not happening now.

  85. Just purchased a new ranch in near Alma Colorado…waiting for the tide to go out…pick sea shells for wind chimes…

    Alma Colorado, elevation: 10,361 ft (3,158 m)

  86. A warming ocean expands, but is pale to the likes of the pocket books for writers of catastrophic sea level science fraud publications…

  87. Today’s Department of Water Resources California Water News picked up on the sea level rise paper:
    http://www.latimes.com/science/sciencenow/la-sci-sn-climate-sea-level-20150113-story.html
    and
    http://www.ibtimes.com/sea-level-rise-climate-change-larger-problem-thought-new-study-claims-1783844

    Re the Harvard re-study, 1991 was when the surveying datum was changed. Most of the US and territory sea level measurements were based on actual field work, the kind where you go outside and get wet and cold and hot and dirty and have to swamp out sight lines and dig around for monuments. Field work involved first-order or higher leveling by the US Coast and Geodetic Survey, the precursor agency to NOAA. Most of last century’s measurements were based on the National Geodetic Vertical Datum of 1929 (NGVD 29), based on physical benchmarks at the coasts. Quoting NOAA FAQ:
    “Mean sea level was held fixed at the sites of 26 tide gauges, 21 in the United States and 5 in Canada. The datum is defined by the observed heights of mean sea level at the 26 tide gauges and by the set of elevations of all bench marks resulting from the adjustment. A total of 106,724 kilometers of leveling was involved, constituting 246 closed circuits and 25 circuits at sea level.”

    The datum was changed in 1991 based on the Earth’s geoidal (equipotential) surface. Again quoting NOAA FAQ:
    “The North American Vertical Datum of 1988 (NAVD 88) is the vertical control datum established in 1991 by the minimum-constraint adjustment of the Canadian-Mexican-United States leveling observations. It held fixed the height of the primary tidal bench mark, referenced to the new International Great Lakes Datum of 1985 local mean sea level height value, at Father Point/Rimouski, Quebec, Canada. Additional tidal bench mark elevations were not used due to the demonstrated variations in sea surface topography, i.e., the fact that mean sea level is not the same equipotential surface at all tidal bench marks.”

    There is not a simple 1:1 relationship between old elevations tabled in NGVD 29 vs. NAVD 88. The difference in some locations can be about a meter. NOAA provides a conversion tool at:
    http://www.ngs.noaa.gov/TOOLS/Vertcon/vertcon.html

    It appears that the researchers did not look into the above details when casting aspersions on the work of the surveyors of the last century. The primary purpose of the coastal surveying was for coastal engineering works related to harbors and dredging. What the “sea level” might have been out in the middle of the ocean wasn’t on anyone’s radar back then, because ships don’t dock out there and the water is deep enough to not require dredging.

    On the subject of dredging, has the alleged unprecedented acceleration in sea level been reflected in a corresponding decrease in dredging contracts let by harbor and port authorities?

    • Dredging has zero affect on tide levels. Dredging has been partially slowed by ecology “experts” who have engaged in not disturbing nature (or our pollution). Example: It was okay to divert the Nooksack river into Bellingham Bay which has been filling up with river sediment from the river, but do not dredge out the muck filling in the bay. Why? Several reasons…one of which, the new mud is burying the “stuff” Georgia Pacific was dumping into the bay. Similarly, one could assume dredging of other water ways can be stopped by ecology groups for reasons of similar concern. However, there was not much concern when the pollution was being dumped…hmmmm. A bit off topic, but…what it is…is. Cheers

  88. Bellingham-Washington-vacation-rental-home-proID-59112.html

    …my driveway. :) living well under water. blub blub….blub….

  89. Has anyone posted these?

    Jevrejeva, et al., reported that “the new reconstruction suggests a linear trend of 1.9 ± 0.3 mm/yr [7.5 inches per century] during the 20th century” and “1.8 ± 0.5 mm/yr [7 inches per century] for the period 1870 to 2008.” http://kaares.ulapland.fi/home/hkunta/jmoore/pdfs/Jevrejevaetal2013GPChange.pdf

    Cazenave, et al., reported that gravitational-recovery satellites showed sea level falling or stable from 2003-2009, “The rate of sea-level rise,” Cazenave, et al., v. 4, Nature Climate Change, pp. 358-361, 4 Feb. 2014.

  90. As a petrophysicist, I work with data recorded by electronic instruments within well bores, and try to draw conclusions about the underground formations. I always want to start with the “raw” data, that is the data that have not been adjusted or “corrected”. Granted, sometimes corrections to the recorded data are necessary, but the uncorrected data must always be available for others to reference. I have read the post, and it appears that the authors are further manipulating already manipulated data. Furthermore, I cannot tell whether they are basing their conclusions on the manipulated observations, or predictions based on what they believe are the rates of ice melts and thermal expansion. Either way, their conclusions are many steps removed from reality.

    I believe in direct observation. I recently visited an island resort in Fiji. On the wall in the bar (one of my favorate places on the island), was an airial photograph of the island when the owner purchased it in 1976. Below that photo was another from 2006. I studied the two photographs carefully to see if there was any evidence of sea level rise. I couldn’t see any significant changes in the shore line (but if I could get a big enough government grant, I would go back and study the matter more thoroughly).

    Another observation I have made, is that Hollywood celebrities, who are so terribly concerned about climate change, continue to pay millions for ocean front property.

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