Atmospheric CO2 concentration during the last glaciation

Stauffer, B.; Hofer, H.; Oeschger, H.; Schwander, J.; Siegenthaler, U. (1984). Atmospheric CO2 concentration during the last glaciation. Annals of glaciology, 5, pp. 160-164. International Glaciological Society 10.3189/1984AoG5-1-160-164

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Analyses of atmospheric air extracted from air bubbles in polar glacier ice provide a measure of past CO2 concentrations and their temporal variations. Earlier measurements have shown that the atmospheric CO2 concentration was significantly lower during the late Wisconsin stage and that the change from low to high CO2 concentration occurred in a relatively short time period.

We measured the CO2 concentration of ice samples from the deep ice core recently drilled at Dye 3 (south Greenland). The core section investigated represents ice from about 40 to 30 ka BP. The air extracted from the ice samples shows large variations of CO2 concentration which are correlated with δ18O values of the ice samples. A probable explanation of the results is that corresponding changes of the atmospheric CO2 concentration occurred during that glacial period. These changes could have had a significant influence on the climate. Possible reasons for the variations of the atmospheric CO2 concentration are discussed.

Item Type:

Conference or Workshop Item (Paper)

Division/Institute:

08 Faculty of Science > Physics Institute > Climate and Environmental Physics
08 Faculty of Science > Physics Institute

UniBE Contributor:

Stauffer, Bernhard and Schwander, Jakob

Subjects:

500 Science > 530 Physics

ISSN:

0260-3055

Publisher:

International Glaciological Society

Language:

English

Submitter:

BORIS Import 2

Date Deposited:

14 Oct 2021 09:48

Last Modified:

14 Oct 2021 09:51

Publisher DOI:

10.3189/1984AoG5-1-160-164

BORIS DOI:

10.48350/158750

URI:

https://boris.unibe.ch/id/eprint/158750

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