A "warm blob" of surface water played a role in Greenland's wild climate swings during the last ice age, a new study finds.
Greenland's climate flipped quickly and brutally from cold to warm and back again 25 times between about 20,000 and 70,000 years ago, ice cores and ocean sediments show. The abrupt climate swings, called Dansgaard-Oeschger events, involved extreme changes in average temperature. Each time, the cold snaps continued for centuries, while the rapid warming lasted a few decades.
The new study adds to evidence that warm Atlantic Ocean currents set the tempo for Greenland's climate swings. The findings were published Feb. 5 in the journal Scientific Reports.
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'Warm Blob' Caused Wild Climate Swings During Last Ice Age
Hummm, seems the climate can swing wildly without help from man.