Synchroneity of Tropical and High-Latitude Atlantic Temperatures over the Last Glacial Termination

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 ±9...

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Bibliographic Details
Published in:Science
Main Authors: Lea, David W., Pak, Dorothy K., Peterson, Larry C., Hughen, Konrad A.
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 2003
Subjects:
Greenland
Greenland Ice Sheet Project
Ice Sheet
Planktonic foraminifera
Online Access:http://dx.doi.org/10.1126/science.1088470
https://www.science.org/doi/pdf/10.1126/science.1088470
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Summary: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° to 4°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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