Antarctic ice sheet sensitivity to atmospheric CO2 variations in the early to mid-Miocene

New information from the ANDRILL-2A drill core and a complementary ice sheet modeling study show that polar climate and Antarctic ice sheet (AIS) margins were highly dynamic during the early to mid-Miocene. Changes in extent of the AIS inferred by these studies suggest that high southern latitudes w...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences
Main Authors: Levy, Richard, Harwood, David, Florindo, Fabio, Sangiorgi, Francesca, Tripati, Robert, von Eynatten, Hilmar, Gasson, Edward, Kuhn, Gerhard, Tripati, Aradhna, DeConto, Robert, Fielding, Christopher, Field, Brad, Golledge, Nicholas, McKay, Robert, Naish, Timothy, Olney, Matthew, Pollard, David, Schouten, Stefan, Talarico, Franco, Warny, Sophie, Willmott, Veronica, Acton, Gary, Panter, Kurt, Paulsen, Timothy, Taviani, Marco
Format: Text
Language:English
Published: National Academy of Sciences 2016
Subjects:
Physical Sciences
Antarctic
Antarc*
Ice Sheet
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4822588/
http://www.ncbi.nlm.nih.gov/pubmed/26903644
https://doi.org/10.1073/pnas.1516030113
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Summary:New information from the ANDRILL-2A drill core and a complementary ice sheet modeling study show that polar climate and Antarctic ice sheet (AIS) margins were highly dynamic during the early to mid-Miocene. Changes in extent of the AIS inferred by these studies suggest that high southern latitudes were sensitive to relatively small changes in atmospheric CO2 (between 280 and 500 ppm). Importantly, reconstructions through intervals of peak warmth indicate that the AIS retreated beyond its terrestrial margin under atmospheric CO2 conditions that were similar to those projected for the coming centuries.

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