What Has the Pause Done to the Warming Rate?

by Marlo Lewis on September 8, 2015

in Blog

Post image for What Has the Pause Done to the Warming Rate?

Christopher Monckton of Brenchley has a must-read post today on Watts Up With That. “The long and model-unpredicted Great Pause of 18 years 8 months in global mean lower-troposphere temperature as recorded in the RSS satellite monthly dataset is inexorably driving down the longer-run warming rate, when the IPCC’s predictions would have led us to expect an acceleration,” he reports.

Monckton Pause RSS 18 Years 8 Months (Sep 8 2015)




The bright blue line shows the 440-month lower-troposphere temperature trend in the Remote Sensing Systems (RSS) record. The green line shows the zero degree warming trend during the 224-month “pause” since December 1997, which, as Monckton notes, is “more than half the entire 440-month record.”

Here’s the cool thing (literally). Thanks to the pause, the trend during the full satellite record works out to just 1.21ºC per century. That is substantially below the IPCC’s central estimate in 1990, which (along with NASA scientist Jim Hansen’s overheated prediction in 1988), put global warming on the political map.

Monckton comments:

In 1990, the IPCC had predicted near-straight-line warming of 1 K to 2025, equivalent to almost 2.8 K/century. Of this warming, more than 0.7 K should have happened by now, but only 0.26 K has actually occurred. The IPCC’s central estimate in 1990, though made on the basis of “substantial confidence” that the models on which it relied had captured all the essential features of the climate system, has proven – thus far, at any rate – to be a near-threefold exaggeration.  

The IPCC knows its models are predicting too much warming. In the graph below, Monckton enlarges the right-hand corner of Figure 10.1(a) from the IPCC’s 2013 Fifth Assessment Report (AR5). CMIP3 is the ensemble of models used in the 2007 Fourth Assessment Report (AR4), CMIP5 is the ensemble used in AR5. Although CMIP5 predicts less warming than CMIP3, it still increasingly diverges from reality.

Monckton IPCC 10.1(a) Enlarged Sep 8 2015







Note also that a 21st century warming of 1.21ºC is well within the bounds (0.3ºC-1.7ºC) of the IPCC’s lowest projection (RCP2.6), which assumes a 70% reduction in cumulative greenhouse gas emissions from 2010 to 2100 compared to baseline projections. In short, the RSS data show about the same warming rate that climate campaigners urge policymakers to achieve via draconian restrictions on carbon-based energy.

What is to be done?

Monckton offers two modest proposals for the upcoming COP 21 climate conference in Paris.

(1) Include a secession clause: The Paris pact should acknowledge the right of any nation “to give a short period of notice and then leave the entire treaty process, and all obligations thereunder, without penalty.” Article 27 of the Kyoto Protocol allowed parties to withdraw, and that provision was adopted before the IPCC’s failed predictions became evident.

(2) Include a sunset clause: Policymakers should “take account of a possible widening of the discrepancy between exaggerated prediction and unexciting, harmless observed reality.” The treaty should terminate if, during any 20-year period of the 21st century, the “trend on any one of the five longest-standing monthly global surface or lower-troposphere temperature anomaly datasets, were to fall below 1 Celsius degree per century equivalent.”





Kiwiiano September 8, 2015 at 4:17 pm

Of course you’re going to get a flat green line if you carefully select your starting point at the peak of a strong El Nino and trace through a La Nina. Especially if you only consider surface temperatures and neglect to include global ocean temperature rises. The blue line in the same graph shows what is actually happening and it’s not looking good.

Abel Adamski September 8, 2015 at 7:42 pm

Pity those limited constantly adjusted and manipulated RSS figures do not correlate so well with what is happening in the real world and the biological world.
Those Big pools of cold freshmeltwater from melting ice in Greenland and the Arctic in the Atlantic in conjunction with the hot Pacific and Indian etc oceans is going to provide an interesting fall and winter of extremes in the US and Europe.

Good luck with that, look forward to the convoluted explanations and arguments

Bill Butler September 9, 2015 at 9:26 pm

Proposal (3)

Monckton should get professional help.

See “Pathological Liars and Narcissism”

“Monckton, the craziest man in British politics, who claims that action on climate change is a conspiracy to create a communist world government.”


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