Weekly Reports Polarstern
The Expedition PS109 to the Arctic (Tromsø - Bremerhaven)
The retreat of the ice sheet of Greenland strongly contributes to global sea level rise. The Northeast Greenland Ice Stream thereby transports ice masses toward the continental shelf of western Fram Strait, where its outlet glacier – the 79°N Glacier – is in direct contact with the warm Atlantic Waters recirculating in Fram Strait. Given that the Atlantic Water has been warming in this area while at the same time the 79°N Glacier has begun to show signs of retreat of its floating ice tongue, it is the goal of the expedition “Greenland ice sheet/ocean interaction” (GRISO) to study the complex interactions between the ocean and the ice sheet of Northeast Greenland. In this framework scientists from the disciplines of physical oceanography, geochemistry, glaciology, geodesy, geology, geophysics, atmospheric physics and chemistry, biology and biochemistry will work closely together with each other aboard the research icebreaker RV Polarstern. The vessel will depart from Tromsø, North Norway, on 12 September. Over the course of the expedition, marine studies on the continental shelf close to the Greenland coast will be combined with fieldwork on both the floating ice tongue of the 79°N Glacier and the adjacent near-coastal mainland. We thereby build on studies that were carried out aboard RV Polarstern in summer 2016. The expedition will end on 14 October in Bremerhaven.