Weekly Reports Polarstern
The Expedition PS115/2 Longyearbyen - Bremerhaven
The overall goal of the geoscience program of the six-weeks Expedition PS115/2 (”Polarstern Arctic Ocean Paleoceanography – PArcOP”) is to enhance our insights into the tectonic evolution, climate history and related sedimentary processes in the Central Arctic Ocean, based on seismic reflection and marine-geological data. These new data will contribute to a better understanding of the link between tectonics and climate changes in the Arctic. The key objectives of the marine-geological research program of Expedition PS115/2 are (1) high-resolution studies of Quaternary changes in paleoclimate, especially circum-Arctic ice sheets, sea-ice cover, and surface- and deep-water characteristics and (2) detailed reconstructions of the long-term climate history of the Arctic Ocean during Cenozoic times. Seismic data acquisition will be carried out across the central and southern part of the Lomonosov Ridge, supplementing the profiles obtained during Polarstern Expedition PS87 in 2014. The new seismic data will provide new insights into the tectonic and sedimentary evolution of the Arctic Ocean and the adjacent continental shelves. Furthermore, ocean bottom seismometers will be deployed to monitor micro-earthquakes in the Gakkel-Ridge area.
In addition to the geoscientific key objectives, smaller supplementary studies will be carried out, dealing with (1) the measurements on & sampling of sea ice, melt ponds and open-water areas; (2) the deployment of drift buoys to automatically record position, air pressure and surface-water temperature, and (3) detailed radiosounding activity. Last but not least, a “Floating University” will be held on board Polarstern as part of the International Research Training Group “ArcTrain” (Processes and impacts of climate change in the North Atlantic Ocean and the Canadian Arctic) qualification and education program.