WGII climate risks overstated and invalid
Guest essay by Larry Hamlin
The UN IPCC AR5 WGII final climate report has been released. This UN WGII report attempts to evaluate various global risks associated with future climate change. The evaluation process utilized in the WGII report relies upon global temperature projections obtained from low and high CO2 emissions climate model scenarios that were developed and addressed in the UN IPCC AR5 WGI report which was released last year.
In the UN WGI AR5 report the climate models were shown to exaggerate and overstate projected increases in global temperatures based on CO2 levels assumed present in the atmosphere compared to actual observed global temperatures. This is extremely important given that the WGII report uses these exaggerated climate model higher global temperature projection scenarios to assess climate risks associated with increasing global CO2 levels.
Figure 11.25a from the UN AR5 WGI climate report showing how climate models exaggerate and overstate global temperature projections resulting from increasing atmospheric CO2 levels compared to observed global temperatures .
The UN AR5 WGII report utilizes these climate model exaggerated temperatures to define global risks associated with increasing CO2 levels resulting in greatly overstating future climate risks that are very likely invalid.
Thus the WGII report analysis overstates risks for given levels of atmospheric CO2 levels since as the report notes “Risks are reduced substantially under assumed scenarios with the lowest temperature projections compared to the highest temperature projections”.
The WGII report fails to mention or address that the AR5 WGI report showed that the CO2 driven temperature sensitivity of the earth based on actual global temperature observations is at the very lowest end of the low emissions climate model scenarios. This result reflects the consequence of the 15+ year long and growing global temperature pause which is never discussed in the UN WGII report.
This overriding AR5 WGI lower temperature CO2 atmospheric sensitivity result is simply concealed and ignored in the AR5 WGII final report which blithely goes on to make assessment after assessment of the impacts of increasing CO2 levels based on climate model temperature projections which have been shown to grossly exaggerate and overstate the global temperature increase impacts of atmospheric CO2 levels.
The climate model scenarios developed by the UN have other significant limitations beyond not being able to produce temperature projections that agree with measured global temperatures. These include that climate model temperature projections have no probabilities attached to their computed outcomes and that the resulting temperature projection outcomes are considered to be simply “plausible and illustrative”. Thus comparisons of climate model temperature outcomes to actually observed global temperatures is paramount to assessing whether these projections have validity.
The failure of the UN WGII report to utilize the results of the UN WGI report which showed that climate models grossly exaggerate and overstate global temperatures and then use these same flawed climate models to establish global temperature related risks associated with atmospheric CO2 levels means that the WGII claimed climate risk findings being both overstated and invalid.
Discover more from Watts Up With That?
Subscribe to get the latest posts sent to your email.
The climate model scenarios developed by the UN have other significant limitations beyond not being able to produce temperature projections that agree with measured global temperatures.
Why do they keep on going?
But they are using billion dollar computers to do the modelling.
So exactly what is the real evidence for global warming/climate change (man made)/ climate disruption etc?
1. T he Arctic ice is retreating – well yes, but that reversed sharply last year and the previous trend could have easily been all or partly caused by: i) atmospheric soot, ii) changing salinity levels, and iii) hydrothermal activity deep down on the ocean floor. And, of course, there is that pesky little problem that the Antarctic ice cap’s extent just keeps on growing.
2. The glaciers are melting – well yes, some are, but this is a process which began ~150 years ago, long before man had any impact on climate. More recently, soot may be an important part of glacial melt and of course, some are no longer retreating.
3. The sea levels are rising – well yes, maybe, but this is also a process which began ~150 years ago, long before man had any impact on climate. Another problem is this rate of sea level rise has been decelerating in recent years.
4. The polar bears are suffering/dying out etc. Well yes, maybe in very localised communities, but the vast majority are thriving and even becoming a pest.
5. There are more extreme weather events – well yes, perhaps in an alarmist’s imagination, but all reliable statistics suggest the opposite is true.
6. Crop failure and famine is imminent – well yes, but once again only in an alarmist’s imagination – crop yields continue to increase and increased CO2 has been seen to green the planet, as it is a natural fertiliser.
7. Global temperatures have risen 0.7-0.8 degrees C – well yes, if you mean the last 150 years and it has risen in three clearly defined 30 year periods (followed by cooling periods), the most recent ending in 1976/78. The recent 17 year ‘pause’ in the rise of global temperatures puts a hole in the bows of SS Global Warming.
8. The climate models clearly indicate Thermageddon is almost upon us – well yes, except the models have been shown almost ad infinitum to be hopelessly inaccurate and grossly exaggerate the effects of rising CO2 levels.
There there is the little matter that the geological record shows no evidence of CAGW. In fact in nature, a change in CO2 levels always follows a change of temperature, and not vice versa.
And also, why is the subject of natural climate cycles a heresy among alarmists?
So once again, where is the evidence of global warming, climate change etc?
And that is why most scientists and engineers believe CAGW is a complete crock.
You can see the development in temperature as a result of action-and enjoy.
Artic ice cover can bee periodic with 60 Years periodicity, named as North Atlantic Ocean and which has its principal expression in the sea surface temperature (SST) field.
The satellites has not been around for more than 40 Years.
It’s models all the way down.
@Peter Miller
>And that is why most scientists and engineers believe CAGW is a complete crock.
Reference? I would agree that most engineers believe this since they have to actually make things work and can tell bad science when they see it, but scientists? To me they seem cloistered in an academic never-never land where Truth is whatever will get the next grant.
The WG2 report is based on the unadjusted results of CMIP5 simulations. At the Stockholm meeting last September, WG1 decided not to accept CMIP5 outputs and replaced them with “assessed” projections of future temperatures which are about 40 percent lower.
At that point, the well-advanced WG2 process should have been halted and recommenced on the basis of the new projections. But that didn’t happen and WG2 simply soldiered on to report on impacts of the now- discredited model outputs.
How can WG2 results now be used in Integrated Assessment Models (IAMs) which demand that the data from the two reports be compatible?
The WG2 models of physical reality are merely an excuse for the social science communities to be the primary drivers of global change. As this post lays out, there are numerous statements tied to IPCC that state exactly that. http://www.invisibleserfscollar.com/identifying-education-globally-as-the-crucial-lever-for-nonconsensual-behavior-and-societal-change/
Like the previous post this one is based on tracking what is meant by Adaptation and climate-resilient pathways in Chapter 20 of the Report. Global Change in the IPCC process is the excuse for transformation in the personal, political, and everyday social environments and Chapter 20 says so. The O’Brien/Sygna paper in turn has even more links, including to the GEC-Global Environmental Change Design Project. I am not speculating here. I have been downloading and reading all these intentions and declarations for a week now.
Frighteningly graphic.
The alarm will come to a screeching halt when we run out of OPM (Other People’s Money) to pay for alarming reports.
We could have set up the IPEIAR (Intergovernmental Panel on Everything Is All Right) and got the same result without all of the annoying alarmism. The IPEIAR could have cruised along quietly, meeting in exotic locations and dining on the finest available, and each year write a massive report that ends with an SPM saying, “Everything is all right. Carry on.” But then we’d have to shut that down eventually when we run out of OPM to pay for reassuring reports.
For politicians, the IPCC is far more useful, so that’s the Panel we got. The money? Heck! It’s only other people’s money…
Glenn,
Most climate scientists? Maybe. The estimates of climate sensitivity reported by Revkin over a year ago- see http://dotearth.blogs.nytimes.com/2013/02/04/a-closer-look-at-moderating-views-of-climate-sensitivity/?_php=true&_type=blogs&_r=0
and everyone else, suggest that despite all the alarmist statements by the IPCC and National Academy of Sciences, the climate scientists’ estimates are converging at the very low end of the IPCC 1.5 to 4.5 sensitivity range. The alarmist statements are based on high sensitivity, but the scientists themselves are observing and predicting low sensitivity. Disconnect!?
I know that the IPCC says that Data are just anecdotes, but here in East Texas we had the lowest high temp ever, 51 degrees, when the previous record “low high” had been 53.
So we’re not only having one of the coldest March’s ever, but on our way to having one of the coldest Aprils. But like I said, that’s just an anecdote, the models didn’t predict it, so it can’t be real.
I’ve built a model of the stock market using a combination of UFO, Bigfoot, and Loch Ness monster sightings, which seems to work quite well. Ok, it works some of the time, but I’ve tweaked it so it’s working better, and I have great confidence in it – 97.1% confidence, to be precise. Well, OK, it does have some problems sometimes, but only when it’s cloudy. Well, OK, sometimes when its cloudy too, but I now have 98% confidence in it, so that’s OK.
Further study is required, of course.
The AR5 WG2 results with respect to agriculture summarize studies which are themselves deeply flawed. Posted an example here in 2011. For example,they confound drought with extreme heat. When there is heat but water, there is no problem even during anthesis. For wheat,mthen confoundmthemineitable slowing of yields as Borlaugs rust resistant semi dwarf stains are finally adopted literally everywhere.
Then they extrapolate faulty results using faulty climate models. Worse, for agriculture the GCMs have to be regionally downscaled, making them even worse. Then they find ‘proof’ in corn and wheat price spikes caused respectively by ethanol biofuel and US draught (maize) and Russian drought ( wheat), both conditions since ameliorated.
Would get a D or an F as a term paper.
Larry Hamlin,
Glad to see you converted your previous comment into an essay. The latest IPCC report is nothing short of guess work based on cherry picking to create alarm. It is utter garbage BS and the lack of agreement meant they could pick what they wanted to spin.
In September 2009 Pachauri foresaw the results of the 2013/14 IPCC reports BEFORE all the literature was assessed! Nostradamus is spinning in his grave.
Ethics! He was the scientific advisor to Glorioil at the time. It was a residual oil extraction services company based in the USA now renamed GloriEnergy. He has since cut his ties.
In 2009 Pachauri knew that in 2013 there would be “No best estimate for equilibrium climate sensitivity can now be given because of a lack of agreement on values across assessed lines of evidence and studies.”
A “best estimate for equilibrium climate sensitivity” will NEVER be given as long as the surface temp standstill continues. Never! To do so would be either to match reality in future and end the IPCC once and for all or not match reality in future and still end the IPCC once and for all through model falsification.
@Peter Miller, etc.
“In fact in nature, a change in CO2 levels always follows a change of temperature..”
The gap between a change of temperature and a change in CO2 levels is said to be about an average of 800 years. … About 800 years ago the Earth was in the last stages of the Medieval Warm Period (about AD 950 to 1250) — as shown in this graph :-
http://c3headlines.typepad.com/.a/6a010536b58035970c0133edf988be970b-pi
There appears to be a correlation between the increasing temperatures in about AD 950, and the increasing CO2 levels that started about the year 1750.. (264 years ago), .. at least in the Arctic areas.
If there is any truth in this correlation, CO2 levels should begin to *decrease in the next decades – until about the year 2050 .. (1250 plus 800 years).
This all seems to be too neat and tidy! .. Where did I go wrong?
When a summary misrepresents the summarized there must be a conspiracy. –AGF
Predictions of the future are not science.
.
Computer models are not real data.
.
The 34 years of global average temperature data from weather satellites, from 1979 through 2013, are far from enough data to determine a long term temperature trend.
.
There are no other accurate sources of accurate global average temperature data — surface measurements are not global, and are not accurate — they are in an ever-changing environment.
.
Predictions of a coming catastrophe are a political tool, used for centuries by devious politicians, and religious leaders, to persuade people to do as they say.
.
The predictions do not have to come true for ‘leaders’ to gain power — they just have to be believed by a lot of people.
.
The coming climate change catastrophe is just the latest in a long series of predicted disasters that will never happen — a false crisis used by clever ‘politicians’ to get what they want.
A correction on the good Peter Miller post:
Glaciers have been melting, and sea level has been rising, for over 14,000 years since the last ice age ended, not 150 years as you wrote in your post.
.
In addition, the sea level rise in the past century does not support claims of unusual warming, suggesting that measurements of the average temperature (rising) have not been accurate.
This is why NO oNe should be using this GISS data for anything
http://stevengoddard.wordpress.com/2014/04/07/killing-3-birds-with-one-stone/
It never ceases to amaze me that Monckton, Zeke, Lucia etc keep quoting this data to compare with models etc. Its absolute trash and should not be used for any analysis, Same goes for Hadcrut 3 probably….
BTw Roy Spencer AMSU satellite came in at 0.17C for March 2014
And finally… You really have to wonder about the trend lines used by RSS etc. The trend from 1998 is down
http://images.remss.com/msu/msu_time_series.html
If the model is wrong, running it on a billion-dollar computer will just get you to the wrong answer more quickly.
Bruce Cobb says: “I’ve built a model of the stock market using a combination of UFO, Bigfoot, and Loch Ness monster sightings, which seems to work quite well. Ok, it works some of the time, but I’ve tweaked it so it’s working better, and I have great confidence in it – 97.1% confidence, to be precise.
Anthony, you should add a LIKE button.
REPLY: We’ve tried the like/dislike button in the past, and many people find it distracting – Anthony