A detailed analysis of the rapid changes in ice-core parameters during the last ice age

Staffelbach, T.; Stauffer, B.; Oeschger, H. (1988). A detailed analysis of the rapid changes in ice-core parameters during the last ice age. Annals of glaciology, 10, pp. 167-170. International Glaciological Society 10.3189/S0260305500004377

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Results from deep Greenland ice cores show rapid changes in several parameters in the deepest part. The most probable explanation for these variations is a fast-changing climate during part of the last glaciation. The question arises, however, of whether the observed changes in the ice cores could also be due to, or at least be influenced by, discontinuities in the stratigraphy. We present new CO2 and δ18O data from the Camp Century and Dye 3 deep ice cores. The data show rapid changes in CO2 and δ18O in both cores. One transition which was investigated in detail seems to be more rapid in the ice core from Dye 3 than in the Camp Century core. The broadening of a sharp δ18O transition due to molecular diffusion is discussed. Since this broadening is larger than the observed width of the transition, we discuss the possibility of a mechanism that can produce stratigraphic disturbances on a small scale. This mechanism is based on a calculation of the compression of horizontal layers which have equal density but different viscosities.

Item Type:

Conference or Workshop Item (Paper)

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:

0260-3055

Publisher:

International Glaciological Society

Language:

English

Submitter:

BORIS Import 2

Date Deposited:

13 Oct 2021 14:15

Last Modified:

13 Oct 2021 14:27

Publisher DOI:

10.3189/S0260305500004377

BORIS DOI:

10.48350/158762

URI:

https://boris.unibe.ch/id/eprint/158762

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