All Star Science Panel Drops Bombshell Climate Paper


The world’s oceans could rise catastrophically as soon as 50 years from now, according to a new paper published this morning in Atmospheric Chemistry and Physics…The researchers behind the paper—Dr. James Hansen and 18 coauthors—looked back to 120,000 years ago, the last time the Earth warmed by the about the same amount it has today. (Global temperatures are now 1˚ C, or 1.8˚ F, above preindustrial levels.) Back then, natural warming unleashed nearly all of the water locked in polar ice sheets, sending sea levels surging 20-30 feet higher….Stratification, the key idea in the new paper, means that warm ocean water would potentially reach the base of ice sheets that sit below sea level, melting them from below (and causing more ice melt and thus, stratification). It also means, in Hansen’s paper, a slowdown or even eventual shutdown of the overturning circulation in the Atlantic ocean, due to too much freshening in the North Atlantic off and around Greenland, and also a weakening of another overturning circulation in the Southern Ocean…This, in turn, causes cooling in the North Atlantic region, even as global warming creates a warmer equatorial region. This growing north-south temperature differential, in the study, drives more intense mid-latitude cyclones, or storms…As Dr. Mann put it, “I think we ignore James Hansen at our peril.”

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About groundswellbasscoast

This is on behalf of local climate change group. Material is selected by Bernie McComb and does not necessarily represent opinion of whole group.
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