The university of Colorado has recently updated their sea level graph from the TOPEX satellite data. The 60 day smoothed trend is still stalled and shows no rise over what was seen since the peak in mid 2010:
Data
Raw data (ASCII) | PDF | EPS
Here’s the same data with season variation retained, but the really interesting data is from ENVISAT, which shows no upward trend:
(Graph from Steve Goddard). Envisat data here: ftp://ftp.aviso.oceanobs.com/
Sea level is lower than eight years ago, and according to the graph above just passed the lowest annual peak in the Envisat record.
It’s damned inconvenient.
![sl_ns_global[1]](http://wattsupwiththat.files.wordpress.com/2012/02/sl_ns_global1.png?resize=532%2C370&quality=75)
![sl_global[1]](http://wattsupwiththat.files.wordpress.com/2012/02/sl_global1.png?resize=532%2C370&quality=75)

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Anyone else notice that UofC have “adjusted” the previous data? e.g.
Was (version to 2011.6917)
1992.9595 -4.889
1992.9866 -6.913
1993.0138 -9.165
1993.0409 -12.178
1993.0681 -11.172
Now (#version_2012_rel1 includes 2011.7188 to 2011.9631)
1992.9595 -4.783
1992.9866 -6.859
1993.0138 -9.163
1993.0409 -12.222
1993.0681 -11.252
These 2 versions came from the same UofC ‘Raw data (ASCII)’ link, the previous version uplifted Sunday, January 22, 2012. Unfortunately I didn’t retain the version #.
Jason-2 trend with new data tacked on to previous from peak:-
-0.13mm/yr 2010.1714 to 2011.9631 (Envisat -0.004mm/yr 2009.796 to 2011.8626)
T/P/J-1/J-2 trend
3.34mm/yr 1992.9595 to 2011.9631 (using new data tacked on to previous version above).
3.57mm/yr 1992.9595 to 2010.1714 peak (using previous version above).
UofC never change their 3.1mm/yr – its garbage. Next chore is to redo my plots with the entire new dataset and compare trends to the previous dataset on like-for-like basis.
Climate Change Science and trends
Can anyone come up with a trick to fix this problem?!!!! Mike??
Reblogged this on pindanpost.
All instruments provide an output that shows some value. That ouput value changes in a relative sense for changes in conditions measured (noise aside). To calibrate an instrument requires settings some figure in that output to be the equivalent of some external, reference source. That allows scale and offset to be determined. Noise and short sampling lengths make calibration difficult.
I think I will wait for 6 months or so (when we will get close to the low point in the annual cyclic change in these values) to make any pronouncement about absolute sea level change.
R. Gates says:
February 14, 2012 at 9:53 pm
Ask the good people of Australia where some of that ocean water has gone. The La Ninas over he few years have not been kind. Grace satellite data shows quite well what has been happening.
——-
The Himalayan glaciers, apparently!
Doug Cotton, your source, Prof Johnson says: “Pointing this instrument to a (cloudy) sky, the reading of the instrument could be 324 W /m2 , which by alarmists may be present as experimental evidence of substantial backradiation: Since the instrument shows backradiation, backradiation must exist, right?…. No, it is not so simple….”
It is generally warmer on cloudy nights than clear nights. The generally accepted explanation for that warmth is that the clouds absorb IR and transmit roughly 50% of what they absorb back to the surface. The prof does not appear to understand that simple explanation. Perhaps he or you have an alternative explanation.
Another way to measure IR from clouds is from above. Satellites can get a good read on cloud top temperatures by amount of IR.
If clouds can emit IR (in all directions), why not CO2?
Well, you can cherry-pick a few 2 year periods of no sea level rise in the first two graphs. You can’t claim that the trend is gone. Yet.
And you shoudn’t even be thinking “yet” just because it suits your theory, you should just be waiting for whatever comes, then discuss it.
The recent down- bubble on the graph has “La Nina” written all over it just as the easily discerned equal but opposite up-bubble in 1998 has “El Nino” written all over it.
Now if we could only predict the timing and severity of El Nino/La Nina decades in advance we’d have something really useful to show for the money we throw at the climate boffinery.
Anyhow, these ENSO departures from the trend don’t appear to alter the trend so this would appear to be something that’s not going to shake any AGW beliefs but prematurely labeling it as the beginning of a long term down-trend might inspire some anti-AGW belief among the less discerning types.
Re my comment here http://wattsupwiththat.com/2012/02/14/sea-level-still-not-cooperating-with-predictions/#comment-893071
I’ve subtracted the previous dataset from the latest version and turns out there’s effectively been a +0.259mm/yr (0.007x*37) trend adjustment introduced from 2009.004 to 2011.6917 when the previous dataset ended.
The changes are both up and down so I don’t see how it can be GIA.
What’s up with that?
How come the latest satellite measurement shows a reading just above the trend-line ?
http://www.aviso.oceanobs.com/fileadmin/images/news/indic/msl/MSL_Serie_MERGED_Global_IB_RWT_GIA_Adjust.png
What’s up with that ?
Roger wrote, “I guess what I’m stating is that there is no known sea level, there never was and there isn’t today….. we’re free to make it up as we go along, because you can be damned sure that’s exactly what CU and the rest of the lunatics are doing.”
Thank you, Roger. I’m not a scientist but a librarian who serendipituously discovered this site the night of Climategate and has been fascinated ever since by the scientific debate that goes on here. Your comment tonight resonated with me as a layman: what are scientists talking about when they talk about sea levels? Where? When? For how long? Do they accept that sinking lands or growing deltas and coral islands affect sea levels? What are they measuring?
Envisat In my eyes. Raw data seem to have no trend. Maybe even changing to downward if the next bottom will be lower than the last one. All adjustments seem make the raise even greater.
It puzzles me that anyone would still link to anything from “Sceptical Science” and still expect to be taken seriously. !!
Posted on February 14, 2012 by Anthony Watts
Sea level is lower than eight years ago, and according to the graph above just passed the lowest annual peak in the Envisat record.
It’s damned inconvenient.
Try.
There are several thoughts to match:
There is a definition of a linear 2.1 mm / year sea level increase, it is NOT a hard measured fact. Nerem et al. 1997 doi: 10.1029/97GL01288. issn: 0094-8276:
„The TOPEX/POSEIDON satellite altimeter mission has measured sea level on a global basis over the last 4 years at 10 day intervals.
After correcting for a recently discovered error in the measurements, the estimated rate of global mean sea level change over this time period is -0.2 mm/year.
Comparisons to tide gauge sea levels measured in spatial and temporal proximity to the satellite measurements suggest there is a residual drift in the satellite measurement system of -2.3+-1.2 mm/year, the origin of which is presently unknown.
Application of this rate correction yields a calibrated estimate of +2.1+-1.3 mm/year for the rate of sea level rise, which agrees statistically with tide gauge observations of sea level change over the last 50 years. “
A linear fit of the present sealevel,com data gives a linear increase of about 3.2 mm/year. It would be best to subtract 2.1 mm/year this function from the 3.2 mm/year.
However I have subtract the hole 3.2 mm/year function from the data.
Results:
There are sea level oscillations which frequency is equal to the solar tide pattern of Mercury/Earth & Co.;
http://volker-doormann.org/images/sealevel_vs_xyz.gif
The oscillation is also weak impressed in the GL UAH Temperature.
Conclusion. A discussion on the true sea level is senseless as long scientists definean increasing level because of unexplained satellite drifts and 50 year slopes.
Because this is a general problem also with defined global temperature levels, a better reference to understand the connection between sea level and temperature the oscillating profile could it be. And since people now speak in public load about the (cold) Sun, it may also a good job to include the solar tide function, I have discovered exact two years ago 11th February 2010. From this recognition of a phase coherence of solar function and sea level there is no need for delays anymore.
To whom it may concern. Do not smooth or define data for the crowd without have the origin data for download.
V.
James Sexton says:
February 14, 2012 at 10:41 pm
Chris Colose says:
February 14, 2012 at 9:12 pm
James – Chris has apparently gone back to his safe haven at NASA GISS. Everytime I bring up Model E, people seem afraid to discuss it. Oh well, can’t say that I blame them.
On the subject of the climate industry’s huge billion dollar largess, please see this. Note the double digit increases over the past three years while the rest of the economy was tanking.
And it’s pretty easy to find the government salaries of people like Jim Hansen and Gavin Schmidt online. They make very comfortable six figure salaries (not including benfits). And of course, we know Hansen make’s MUCH more due to his connections in the climate industry. All this while they attempt to destroy the jobs of people they don’t like (like the hard working people in the oil and gas industries).
The missing heat is not in the oceans. It’s heating all the dark matter, which scientists say must be there, but has yet to be detected … rather like the missing heat.
What is interesting about the various satellite data sets is that they may be interpreted in a number of different ways, each depending on the belief or individual bias of the investigator. However, what isn’t being highlighted in this post and comments is that it is very difficult, regardless of bias to look at the various data sets and determine that there is an acceleration in the rate of sea level rise. This is the really important point. One can debate weather there has been a de-acceleration in the time series, but it takes models to show an acceleration …….. but of course, as I understand the recent predictions, one will need to wait to 2040ish to see the trend..??
What is also interesting is that for Maritime Canada, i.e. the tide gauges at Charlettown (Prince Edward Island), North Sydney (Nova Scotia), Halifax (Nova Scotia), Yarmouth, Nova Scotia, and St. John (New Brunswick), there has been NO acceleration in the rate of sea level rise, none. The only acceleration in the data sets is around 1920ish, long before one can invoke CO2 forced climate change as the cause. This relationship is clearly seen in Gehrels (2005).
Frank K. says:
February 15, 2012 at 5:37 am
James Sexton says:
February 14, 2012 at 10:41 pm
Chris Colose says:
February 14, 2012 at 9:12 pm
………
On the subject of the climate industry’s huge billion dollar largess, please see this. Note the double digit increases over the past three years while the rest of the economy was tanking.
=======================================================
No doubt. It irks me to no end when people criticize in dependent scientists for accepting money, when the govt. scientist won’t get off my teat and get a real job and do something useful with their lives. How many climate scam govt agencies do we really need? Wouldn’t one or two be enough to make libs wet themselves?
A couple of charts if anybody is interested.
Comparison of sea level (12 month moving average) with and without GIA adjustment
http://i1159.photobucket.com/albums/p623/Oefinell/sealeveladjustedandunadjusted201202.jpg
Sea level annual change 5 year average using linear regression
http://i1159.photobucket.com/albums/p623/Oefinell/sealevelunadjusted.jpg
Is is entirely outside the bounds of possibility that observed sea-level change is caused by or contributed to/from..
1. Groundwater extraction – how much water is left in the Ogallala – how are the Libyans getting on with their ‘Water from the Desert’ project – have Punjabi wheat farmers now sunk their wells below 500metres when 20 years ago 50metres was enough. Where did all that water finish up if not in The Sea?
2. Soil erosion from farmland – how much dirt does the Yellow River carry with it – is it true that Pakistan is (far from sinking/drowning) actually increasing in area at 20 sqkm per year and what exactly do the Army Engineers do with all the stuff they dredge out of the Mississippi?
I think we should be quite serious about these things because if the oceans are not expanding, then Global Warming is dead, presumably replaced by Global Cooling which surely means many of us and our kind are dead.
Nero apparently fiddled while Rome burned- are we fiddling while the planet freezes?
But………but we just came out of the hottest decade on the record. Greenland has been losing ice, the poor glaciers have been in terminal meltdown and you tell me that its lower than 8 years ago and that ENVISAT shows no upward trend. This is inconvenient truth.
Jimbo:
….. the Warmists in year 2000 (TAR and SRES reports) forecast RISING temps from the
new Millenium year 2000 on, from year to year WITHOUT temp plateau, you can see there is no plateau being forecast in any of all scenarios….. Therefore they are wrong…..
OK, it is the hottest decade alright, but at the same time, it is the end of global warming,
the AGW footprint is not visible anymore after 17 years, AGW did not get
the warming mechanism right, therefore no more rising temps……you can convince yourself
in a few years.more time….the Skeptics are ahead of their time and AGW is outright wrong…
…… we are the sceptical good guys and they AGW will clearly
be the climate villains….no doubt about that….
JS
Are there any comparisons of tide gauge trends laid alongside Topex etc? If so do they show an increasing trend?
Philip Finck says:
February 15, 2012 at 6:09 am
However, what isn’t being highlighted in this post and comments is that it is very difficult, regardless of bias to look at the various data sets and determine that there is an acceleration in the rate of sea level rise. This is the really important point.
It may a really important point for you. For me the point is a most complete view on all relevant relations involved.
A rate is a dimension per time interval and its nature is a linear function with time. Knowing the dynamic of sea levels there are amplitudes of meters from tide rhythm to cm from the temperature oscillations (about ~2.3 cm per 0.1°Cel.) . Here we have level values of about ~100 cm between the temperatures in the LIA and this warm era of ~4° Cel.
If we take the span of +2.2° Cel in 1150 AD in medivial warming and -2.2° Cel. in the LIA in 1700 AD after T. Edwards et al (Columbia Ice Field) , in total of 4.4° Cel. this would be 101.2 cm difference in sea level which is good harmony with Data from the Maldives.
These are simple calculations using the property of water at 19°Cel., and an ocean deepness of 1000 m.
A rate contains no physics.
The problem we have is the problem that such rate confused the searcher for truth and leads him astray. The best picture designer show Big Ben clock half in water in photo realism. The upper class move to houses in the mountains. Evolution goes on.
V.