Synchronous Change of Atmospheric CO2 and Antarctic Temperature During the Last Deglacial Warming

Understanding the role of atmospheric CO2 during past climate changes requires clear knowledge of how it varies in time relative to temperature. Antarctic ice cores preserve highly resolved records of atmospheric CO2 and Antarctic temperature for the past 800,000 years. Here we propose a revised rel...

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Bibliographic Details
Published in:Science
Main Authors: Parrenin, F., Masson-Delmotte, V., Köhler, P., Raynaud, D., Paillard, D., Schwander, J., Barbante, C., Landais, A., Wegner, Anna, Jouzel, J.
Format: Article in Journal/Newspaper
Language:unknown
Published: AAAS 2013
Subjects:
Antarctic
Antarc*
Online Access:https://epic.awi.de/id/eprint/32547/
https://epic.awi.de/id/eprint/32547/1/parrenin2013s_accepted_all.pdf
http://www.sciencemag.org/content/339/6123/1060
https://hdl.handle.net/10013/epic.41132
https://hdl.handle.net/10013/epic.41132.d001
Description
Summary:Understanding the role of atmospheric CO2 during past climate changes requires clear knowledge of how it varies in time relative to temperature. Antarctic ice cores preserve highly resolved records of atmospheric CO2 and Antarctic temperature for the past 800,000 years. Here we propose a revised relative age scale for the concentration of atmospheric CO2 and Antarctic temperature for the last deglacial warming, using data from five Antarctic ice cores. We infer the phasing between CO2 concentration and Antarctic temperature at four times when their trends change abruptly. We find no significant asynchrony between them, indicating that Antarctic temperature did not begin to rise hundreds of years before the concentration of atmospheric CO2, as has been suggested by earlier studies.

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