NorthGreen: Unlocking records from sea to land in Northeast Greenland

The current trend of anthropogenic CO₂ forcing of the climate system calls for a better understanding of how polar 15 ice sheets may respond to accelerating global warming. The sensitivity of the Greenland ice sheet to polar amplification, changes in ocean heat transport, and deteriorating perennial sea ice conditions makes the Northeast Greenland margin a pertinent location to understand the impact of climate change on ice sheet instability and associated sea level rise. Throughout the Cenozoic, ocean heat fluxes toward and along Northeast Greenland have been controlled by water mass exchanges between the Arctic and Atlantic oceans. A key element here is the current flow through oceanic gateways, notably the Fram Strait and 20 the Greenland-Scotland Ridge. To gain a true long-term (million-year) perspective of ice sheet variability in this region it is essential to understand the broader context of ice-ocean-tectonic interactions. Coupling between the ice sheet, the subsurface, the ocean, and sea ice are readily observable today in Northeast Greenland, but geological records to illuminate long-term trends, and their interplay with other parts of the global climate system, are lacking. Consequently, the NorthGreen workshop was organized at the Geological Survey of Denmark and Greenland in collaboration with Aarhus (Denmark) and Stockholm 25 (Sweden) universities in November 2022 to develop Mission Specific Platform (MSP) proposals for drilling the Northeast Greenland margin under the umbrella of the MagellanPlus Workshop Series Programme of the European Consortium for Ocean Research Drilling (ECORD). Seventy-one participants representing a broad scientific community discussed key scientific questions and primary targets to address through scientific drilling in Northeast Greenland. Three pre-proposals were initiated during the workshop targeting Morris Jesup Rise, Northeast Greenland continental shelf, and Denmark Strait.