Lake sediments as continental δ18O records from the glacial/post-glacial transition

Siegenthaler, U.; Eicher, U.; Oeschger, H.; Dansgaard, W. (1984). Lake sediments as continental δ18O records from the glacial/post-glacial transition. Annals of glaciology, 5, pp. 149-152. International Glaciological Society 10.3189/1984AoG5-1-149-152

[img] Text
lake-sediments-as-continental-18o-records-from-the-glacialpost-glacial-transition.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (3MB)

As in polar ice, 18O variations of precipitation are recorded in carbonate sediments formed in lakes (lake marl). We have analyzed many late-glacial profiles from Europe, There are strong l8O variations which coincide with well-known pollen zone boundaries and which indicate that abrupt, drastic climatic changes occurred in the late glacial period. These events are a major warming around 13 ka BP (pollen zone boundary Oldest Dryas/Bölling) and a marked cold phase between about 10.8 and 10 ka BP (Younger Dryas). Comparison of the δ18O records of European lake sediments and of Greenland ice cores reveal a striking similarity which indicates that climatic changes in the late glacial and early postglacial were parallel in Greenland and in Europe. First results from North American lake-sediment profiles do not exhibit similar δ18O variations. This pattern of climatic changes was probably caused by retreating and readvancing polar water in the high-latitude North Atlantic Ocean, as discussed by Ruddiman and McIntyre (1981).

Item Type:

Conference or Workshop Item (Paper)

Division/Institute:

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

Subjects:

500 Science > 530 Physics

ISSN:

0260-3055

Publisher:

International Glaciological Society

Language:

English

Submitter:

BORIS Import 2

Date Deposited:

14 Oct 2021 10:08

Last Modified:

14 Oct 2021 10:08

Publisher DOI:

10.3189/1984AoG5-1-149-152

BORIS DOI:

10.48350/158751

URI:

https://boris.unibe.ch/id/eprint/158751

Actions (login required)

Edit item Edit item
Provide Feedback