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Old 10-06-2013, 08:24 AM  
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IPCC Calls Off Planetary Emergency?

Posted on October 4, 2013 by Guest Blogger

Guest essay by Marlo Lewis

Okay, they don’t do so in as many words. But in addition to being more confident than ever (despite a 16-year pause in warming and the growing mismatch between model projections and observations) that man-made climate change is real, they are also more confident nothing really bad is going to happen during the 21st Century.

The scariest parts of the “planetary emergency” narrative popularized by Al Gore and other pundits are Atlantic Ocean circulation shutdown (implausibly plunging Europe into a mini-ice age), ice sheet disintegration raising sea levels 20 feet, and runaway warming from melting frozen methane deposits.

As BishopHill and Judith Curry report on their separate blogs, IPCC now believes that in the 21st Century, Atlantic Ocean circulation collapse is “very unlikely,” ice sheet collapse is “exceptionally unlikely,” and catastrophic release of methane hydrates from melting permafrost is “very unlikely.” You can read it for yourself in Chapter 12 Table 12.4 of the IPCC’s forthcoming Fifth Assessment Report.

But these doomsday scenarios have always been way more fiction than science. For some time now, extreme weather has been the only card left in the climate alarm deck. Climate activists repeatedly assert that severe droughts, floods, and storms (Hurricane Sandy is their current poster child) are now the “new normal,” and they blame fossil fuels.

On their respective blogs Anthony Watts and Roger Pielke, Jr. provide excerpts about extreme weather from Chapter 2 of the IPCC report. Among the findings:

“Current datasets indicate no significant observed trends in global tropical cyclone frequency over the past century … No robust trends in annual numbers of tropical storms, hurricanes and major hurricanes counts have been identified over the past 100 years in the North Atlantic basin.”
“In summary, there continues to be a lack of evidence and thus low confidence regarding the sign of trend in the magnitude and/or frequency of floods on a global scale.”
“In summary, there is low confidence in observed trends in small-scale severe weather phenomena such as hail and thunderstorms because of historical data inhomogeneities and inadequacies in monitoring systems.”
“Based on updated studies, AR4 [the IPCC 2007 report] conclusions regarding global increasing trends in drought since the 1970s were probably overstated.”
“In summary, confidence in large scale changes in the intensity of extreme extra-tropical cyclones since 1900 is low.”

Pielke Jr. concludes:

“There is really not much more to be said here — the data says what it says, and what it says is so unavoidably obvious that the IPCC has recognized it in its consensus. Of course, I have no doubts that claims will still be made associating floods, drought, hurricanes and tornadoes with human-caused climate change — Zombie science — but I am declaring victory in this debate. Climate campaigners would do their movement a favor by getting themselves on the right side of the evidence.”

For further discussion, see my post “Global Warming: Planet’s Most Hyped Problem” on this week’s National Journal Energy Insiders blog.

http://wattsupwiththat.com/2013/10/0...ary-emergency/
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