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Inception of the Northern European ice sheet due to contrasting ocean and insolation forcing |
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| Authors: | Bjørg Risebrobakken Trond Dokken Eystein Jansen Yongqi Gao Helge Drange |
| Institution: | a Bjerknes Centre for Climate Research, Allégaten 55, 5007 Bergen, Norway b Department of Earth Science, University of Bergen, Allégaten 41, 5007 Bergen, Norway c Nansen Environmental and Remote Sensing Centre, Thormøhlensgt. 47, 5006 Bergen, Norway |
| Abstract: | About 115,000 yr ago the last interglacial reached its terminus and nucleation of new ice-sheet growth was initiated. Evidence from the northernmost Nordic Seas indicate that the inception of the last glacial was related to an intensification of the Atlantic Meridional Overturning Circulation (AMOC) in its northern limb. The enhanced AMOC, combined with minimum Northern hemisphere insolation, introduced a strong sea-land thermal gradient that, together with a strong wintertime latitudinal insolation gradient, increased the storminess and moisture transport to the high Northern European latitudes at a time when the Northern hemisphere summer insolation approached its minimum. |
| Keywords: | Glacial inception Nordic Seas Northern European ice sheets Paleo-reconstruction: OGCM AMOC Insolation Insolation gradient |
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