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. 2003 Sep 5;301(5638):1361-4.
doi: 10.1126/science.1088470.

Synchroneity of tropical and high-latitude Atlantic temperatures over the last glacial termination

David W Lea  1 , Dorothy K Pak, Larry C Peterson, Konrad A Hughen
Affiliations

Synchroneity of tropical and high-latitude Atlantic temperatures over the last glacial termination

David W Lea et al. Science. .

Abstract

A high-resolution western tropical Atlantic sea surface temperature (SST) record from the Cariaco Basin on the northern Venezuelan shelf, based on Mg/Ca values in surface-dwelling planktonic foraminifera, reveals that changes in SST over the last glacial termination are synchronous, within +/-30 to +/-90 years, with the Greenland Ice Sheet Project 2 air temperature proxy record and atmospheric methane record. The most prominent deglacial event in the Cariaco record occurred during the Younger Dryas time interval, when SSTs dropped by 3 degrees to 4 degrees C. A rapid southward shift in the atmospheric intertropical convergence zone could account for the synchroneity of tropical temperature, atmospheric methane, and high-latitude changes during the Younger Dryas.

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