2015 was hottest year in historical record, scientists say

“Scientists reported Wednesday that 2015 was the hottest year in the historical record by far, breaking a mark set only the year before — a burst of heat that has continued into the new year and is roiling weather patterns all over the world,” as The New York Times is reporting.

“In the contiguous United States, the year was the second-warmest on record, punctuated by a December that was both the hottest and the wettest since record-keeping began. One result has been a wave of unusual winter floods coursing down the Mississippi River watershed.

‘Scientists started predicting a global temperature record months ago, in part because an El Niño weather pattern, one of the largest in a century, is releasing an immense amount of heat from the Pacific Ocean into the atmosphere. But the bulk of the record-setting heat, they say, is a consequence of the long-term planetary warming caused by human emissions of greenhouse gases.

“The whole system is warming up, relentlessly,” said Gerald A. Meehl, a scientist at the National Center for Atmospheric Research in Boulder, Colo.

“It will take a few more years to know for certain, but the back-to-back records of 2014 and 2015 may have put the world back onto a trajectory of rapid global warming, after a period of relatively slow warming dating to the last powerful El Niño, in 1998.

“Politicians attempting to claim that greenhouse gases are not a problem seized on that slow period to argue that ‘global warming stopped in 1998,’ with these claims and similar statements reappearing recently on the Republican presidential campaign trail.

“Statistical analysis suggested all along that the claims were false, and that the slowdown was, at most, a minor blip in an inexorable trend, perhaps caused by a temporary increase in the absorption of heat by the Pacific Ocean.

“’Is there any evidence for a pause in the long-term global warming rate?’ said Gavin A. Schmidt, head of NASA’s climate-science unit, the Goddard Institute for Space Studies, in Manhattan. ‘The answer is no. That was true before last year, but it’s much more obvious now.’”

The rest of the article is here.

Author: jeffpelline

Jeff Pelline is a veteran editor and award-winning journalist - in print and online. He is publisher of Sierra FoodWineArt magazine and its website SierraCulture.com. Jeff covered business and technology for The San Francisco Chronicle for years, was a founding editor and Editor of CNET News, and was Editor of The Union, a 145-year-old newspaper in Grass Valley. Jeff has a bachelor's degree from UC Berkeley and a master's from Northwestern University. His hobbies include sailing and trout fishing.

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