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Since the last IPCC report in 2007, much has changed. It is now more than 15 years since global average temperature rose significantly. Indeed, the IPCC chairman Rajendra Pachauri has conceded that the "pause" already may have lasted for 17 years, depending on which data set you look at. A recent study in Nature Climate Change by Francis Zwiers and colleagues of the University of Victoria, British Columbia, found that models have overestimated warming by 100% over the past 20 years.
Explaining this failure is now a cottage industry in climate science. At first, it was hoped that an underestimate of sulfate pollution from industry (which can cool the air by reflecting heat back into space) might explain the pause, but the science has gone the other way—reducing its estimate of sulfate cooling. Now a favorite explanation is that the heat is hiding in the deep ocean. Yet the data to support this thesis come from ocean buoys and deal in hundredths of a degree of temperature change, with a measurement error far larger than that. Moreover, ocean heat uptake has been slowing over the past eight years.
The most plausible explanation of the pause is simply that climate sensitivity was overestimated in the models because of faulty assumptions about net amplification through water-vapor feedback. This will be a topic of heated debate at the political session to rewrite the report in Stockholm, starting on Sept. 23, at which issues other than the actual science of climate change will be at stake.
'Global warming is just HALF what we said': Top climate scientists admit computers got the effects of greenhouse gases wrong
Earth has gained 19,000 Manhattans of sea ice since this date last year, the largest increase on record. There is more sea ice now than there was on this date in 2002.
'Arctic ice area is increasing, as new ice is forming rapidly north of 80N. Ice area is the highest since 2006. The year over year change in Arctic sea ice area has blown away the record for ice growth, by more than a factor of two.'
Usually IMO anything that can push their agenda 21
The 100% error in the models is something I posted in the Artic Ice sheet thread and is reposted or referenced in this new WSJ article.
(NIPCC), it is now much easier for media to adopt the second more balanced approached,” continued Harris. “Co-authored and co-edited by Dr. Craig Idso, Professor Robert Carter, and Professor S. Fred Singer who worked with a team of 44 other climate experts, this document cites more than 1,000 peer-reviewed scientific papers to show that the IPCC has ignored or misinterpreted much of the research that challenges the need for carbon dioxide (CO2) controls. In other words, the NIPCC report demonstrates that the science being relied upon by governments to create multi-billion dollar policies is almost certainly wrong.”
But now, with the IPCC unable to convincingly explain the recent stall in warming (some say a change to weak cooling), the fact that they are forced to actually recognize reality and make changes in their report — possibly reducing the lower bound for future warming, thus reducing the range of climate sensitivity — is quite momentous
I’m sure the politicians believed we would have had new energy policies in place by now, in which case they could have (disingenuously) claimed their policies were responsible for global warming “ending”. Not likely, since atmospheric CO2 continues to increase, and even by the most optimistic estimates renewable energy won’t amount to more than 15% of global energy generation in the coming decades.
But, I digress. My main point is that nothing stands in the way of a popular theory (e.g. global warming) better than failed forecasts. We are now at the point in the age of global warming hysteria where the IPCC global warming theory has crashed into the hard reality of observations. A few of us are not that surprised, as we always distrusted the level of faith that climate modelers had in their understanding of the causes of climate change
The IPCC must take everybody for fools. Its own graph shows that observed temperatures are not within the uncertainty range of projections; they have fallen below the bottom of the entire span. Nor do models simulate surface warming trends accurately; instead they grossly exaggerate them. (Nor do they match them on regional scales, where the fit is typically no better than random numbers.)
Climatologist Dr. Eduardo Zorita, one of the authors of the recent paper rejecting the climate models at a confidence level >98% over the past 15 years, has a new post in which he states that the model vs. real-world discrepancy is even greater during the winter months [Dec-Feb], with only 0.2% of 6,104 climate model runs projecting the observed negative trend in winter temperatures [-0.10 C/decade] over the past 15 years. Climate models instead predicted that the most warming would occur during the winter months, the opposite of observations.