Sejrup, H.P., Hjelstuen, B.O., Patton, H. et al. The role of ocean and atmospheric dynamics in the marine-based collapse of the last Eurasian Ice Sheet. Commun Earth Environ 3, 119 (2022). https://doi.org/10.1038/s43247-022-00447-0
The role of ocean and atmospheric dynamics in the marine-based collapse of the last Eurasian Ice Sheet
|Author:||Sejrup, Hans Petter1; Hjelstuen, Berit Oline1; Patton, Henry2;|
1Department of Earth Science, University of Bergen, Bergen, Norway
2Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geosciences, UiT the Arctic University of Norway, Tromsø, Norway
3Geography, University of Oulu, Oulu, Finland
|Online Access:||PDF Full Text (PDF, 8.3 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2022071551712
|Publish Date:|| 2022-07-15
Information from former ice sheets may provide important context for understanding the response of today’s ice sheets to forcing mechanisms. Here we present a reconstruction of the last deglaciation of marine sectors of the Eurasian Ice Sheet, emphasising how the retreat of the Norwegian Channel and the Barents Sea ice streams led to separation of the British-Irish and Fennoscandian ice sheets at c. 18.700 and of the Kara-Barents Sea-Svalbard and Fennoscandian ice sheets between 16.000 and 15.000 years ago. Combined with ice sheet modelling and palaeoceanographic data, our reconstruction shows that the deglaciation, from a peak volume of 20 m of sea-level rise equivalent, was mainly driven by temperature forced surface mass balance in the south, and by Nordic Seas oceanic conditions in the north. Our results highlight the nonlinearity in the response of an ice sheet to forcing and the significance of ocean-ice-atmosphere dynamics in assessing the fate of contemporary ice sheets.
Communications earth & environment
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
We acknowledge funding received through the People programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme FP7/under REA grant agreement no. 317217 (‘GLANAM’- Glaciated North Atlantic Margins). The work was also supported by the Research Council of Norway (RCN) through its Centres of Excellence funding scheme, project no. 223259. A.H. gratefully acknowledges a research professorship from RCN (#223259) and an Academy of Finland Arctic Interactions visiting fellowship to the University of Oulu.
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