The role of ocean and atmospheric dynamics in the marine-based collapse of the last Eurasian Ice Sheet

Abstract Information from former ice sheets may provide important context for understanding the response of today’s to forcing mechanisms. Here we present a reconstruction last deglaciation marine sectors Eurasian Ice Sheet, emphasising how retreat Norwegian Channel and Barents Sea streams led separation British-Irish Fennoscandian at c. 18.700 Kara-Barents Sea-Svalbard between 16.000 15.000 years ago. Combined with sheet modelling palaeoceanographic data, our shows that deglaciation, peak volume 20 m sea-level rise equivalent, was mainly driven by temperature forced surface mass balance in south, Nordic Seas oceanic conditions north. Our results highlight nonlinearity an significance ocean-ice-atmosphere dynamics assessing fate contemporary sheets.