Late glacial climate history from ice cores

Oeschger, H.; Beer, J.; Siegenthaler, U.; Stauffer, B.; Dansgaard, W.; Langway, C.C. (1984). Late glacial climate history from ice cores. In: Jansen, James E.; Takahashi, Taro (eds.) Climate Processes and Climate Sensitivity. Geophysical Monograph Series: Vol. 29 (pp. 299-306). American Geophysical Union 10.1029/GM029p0299

[img] Text
Oeschger_Late_glacial_climate_history_from_ice_cores.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (921kB) | Request a copy

Ice cores contain information on climatic variations and their causes. Recent results obtained on the new deep ice core drilled in 1981 at Dye 3, South Greenland, in the frame of the US-Danish-Swiss Greenland Ice Sheet Program, are:

- Comparison of the θ18O variations in the Greenland ice cores with those in European lake carbonate exhibits strong similarities and provides time marks (13,000, 11,000, 10,000 B.P.) for the Late Glacial section of the ice cores;

- CO2 concentration measurements in the occluded air indicate low (180–200 ppm) CO2 concentration 30,000 to 15,000 B.P. and an increase to ca. 300 ppm around 13,000 B.P. The CO2 increase might reflect a change in the ocean circulation at the end of the last glaciation and could have contributed to the establishment of the Holocene environmental conditions;

- 10Be concentration measurements on samples covering the last 50,000 years show a correlation with θ18O, low θ18O values corresponding to high 10Be concentrations (atoms per g of ice). It is likely that this correlation primarily reflects changes in the rate of precipitation in the northern hemisphere.

Based on the ice core information, climatic events during the Glacial-Postglacial transition are discussed.

Item Type:

Book Section (Book Chapter)

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:

0065-8448

ISBN:

978-0-87590-404-7

Series:

Geophysical Monograph Series

Publisher:

American Geophysical Union

Language:

English

Submitter:

BORIS Import 2

Date Deposited:

18 Jul 2022 12:58

Last Modified:

05 Dec 2022 15:54

Publisher DOI:

10.1029/GM029p0299

BORIS DOI:

10.48350/160967

URI:

https://boris.unibe.ch/id/eprint/160967

Actions (login required)

Edit item Edit item
Provide Feedback