From the UNIVERSITY OF HELSINKI
Ice stream retreats under a cold climate
Why did the Jakobshavn Isbræ ice stream in West Greenland retreat under a cold climate period called the Younger Dryas?
A research article, published in Nature Communications, shows that a warmer ocean surface in central-eastern Baffin Bay triggered the ice retreat during this cold period. The Younger Dryas period occurred 12,900-11,700 years ago and interrupted the atmospheric warming after the last ice age.
The Younger Dryas cold interval as viewed from central Greenland. From: Quaternary Science Reviews Volume 19, Issues 1-5, 1 January 2000, Pages 213-226. Richard B. Alley
Diatoms reveal warm ocean surface in central-eastern Baffin Bay
The published study uses marine fossil diatoms preserved in the sediments to reconstruct past sea surface conditions, including sea surface temperatures, sea ice variability and ocean currents. Diatoms were studied from a ca. 7-meter long sediment core recovered from the…
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