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July 4, 2022: Ocean Circulation and Climate Dynamics Colloquium
Dr. Henrieka Detlef, Aarhus University, Department of Geoscience, Denmark: "Sea ice variability north of Greenland across the Holocene – The Arctic’s last ice area, Nares Strait ice arching, and the North Water Polynya."
When? Monday, 04. July 2022 at 11 am
Where? ZOOM meeting room: https://geomar-de.zoom.us/j/86170048755?pwd=Uj2z-LBlyxZndQfA_bTOEXBdMH7kA_.1
Meeting-ID: 861 7004 8755
Kenncode: 529247
The northern coastline of Greenland, comprising the Lincoln Sea and Nares Strait is a unique sea ice regime. It is part of the Arctic Ocean’s last ice area, suggested to be the last stronghold of multi-year ice under ongoing and future climate warming. In recent years, however, more and more studies are finding evidence for rapidly changing ice conditions in this region, including prolonged periods of open water and recurrent failure of winter ice arching in Nares Strait.
Historically, sediment coring was hindered by heavy ice conditions, but in 2015 and 2019 two successful research cruises on the icebreaker Oden recovered material from northern Nares Strait and for the first time from the southern Lincoln Sea. In this talk, I will explore the Holocene evolution of sea ice along a north south transect from the Lincoln Sea to the northern Baffin Bay and its implications for the stability of the sea ice cover in the last ice area under future anthropogenic warming.
