13C/12C ratios in CO2 extracted from Antarctic ice

Friedli, H.; Moor, E.; Oeschger, H.; Siegenthaler, U.; Stauffer, B. (1984). 13C/12C ratios in CO2 extracted from Antarctic ice. Geophysical Research Letters, 11(11), pp. 1145-1148. American Geophysical Union 10.1029/GL011i011p01145

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Air is extracted from bubbles of polar ice samples by a dry extraction method, and the 13C/12C ratio is measured on CO2 separated from the air.

Ice samples of typically 700 g are crushed at ca. −20°C, the evolving air is trapped cryogenically, and CO2 is frozen out from this air for mass-spectrometric isotope analysis. First δ13C and δ 18O results of CO2 from Antarctic ice cores are presented, and δ13C is discussed in relation to atmospheric CO2 variations. δ13C of 400 to 800 year old ice is ca. 1.1 %o higher than the 1980 atmospheric value, which agrees well with model-based estimations. The measurement of three ca. 50,000 yr old samples yielded astonishingly low values, but contamination cannot be excluded.

Item Type:

Journal Article (Original Article)

Division/Institute:

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

UniBE Contributor:

Stauffer, Bernhard

Subjects:

500 Science > 530 Physics

ISSN:

0094-8276

Publisher:

American Geophysical Union

Language:

English

Submitter:

BORIS Import 2

Date Deposited:

07 Sep 2021 15:38

Last Modified:

07 Sep 2021 15:38

Publisher DOI:

10.1029/GL011i011p01145

BORIS DOI:

10.48350/158778

URI:

https://boris.unibe.ch/id/eprint/158778

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