has successfully completed more than 130 expeditions to the Arctic and Antarctic and offered a temporary home for thousands of researchers from Germany and around the globe. In the process, the [...] miles. The ship is currently on an expedition in the Southern Ocean.

our knowledge of the sea ice in the Arctic and Antarctic is constantly growing, we still don’t understand all the connections and phenomena. Two examples: because the thickness of the Arctic sea ice is steadily declining and meltwater pools are increasingly forming in summer, covering large areas of the Arctic sea ice, both the ice and the ocean below absorb more solar radiation. As a result, more algae grow, marine biomass production increases and more carbon is taken up

Due to intensifying sea-ice melting in the Arctic, sunlight is now penetrating deeper and deeper into the ocean. Since marine zooplankton respond to the available light, this is also

) Using sea surface temperature observations to constrain upper ocean properties in an Arctic sea ice-ocean data assimilation system. J. Geophys. Res. Oceans , 124, 4723-4743, doi:10.1029/2019JC015073 [...] , Q., Ricker, R., Losa, S., Nerger, L., and Zhang, J. (2018) Arctic-wide sea-ice thickness estimates from combining satellite remote sensing data and a dynamic ice-ocean model with data assimilation [...] L., Wu, L. (2017) Assimilating Copernicus SST data into a pan-Arctic ice-ocean coupled model with a local SEIK filter. Journal of Atmospheric and Oceanic Technology , 34, 1985-1999, doi:10.1175/JTECH-D

Iceflux - Ice-ecosystem carbon flux in polar oceans In both Polar Regions, areas covered by sea ice are shrinking due to climate warming. What are the consequences of sea ice decline in the Arctic and the Antarctic Ocean? Answering this question is not only important, because sea ice provides a resting ground for penguins, [...] approaches to fisheries management and nature conservation in the Arctic and Antarctic Oceans under environmental change. The research project investigates ice-covered deep-sea ecosystems in the Arctic

research ship Healy and the icebreaker Oden in the middle of the Arctic Ocean: at 85° 30 N and 015°00’ E over the Gakkel Ridge. Aerial view of RV Polarstern (Photo: Alfred-Wegener-Institut) Operations [...] research vessel Healy and the icebreaker Oden in the middle of the Arctic Ocean at 85° 30 N and 015°00‘ E over the Gakkel Ridge. 2004-2005 – In the framework of the ice station Polarstern experiment the [...] . 06.2012-10.2012 – During the Polarstern’s 27th stay in the Arctic and in the context of the “Sea ice - ocean - seafloor interactions in the changing Arctic” (IceAr) expedition, e.g. long-term changes

Group (Phytoplankton Ecology and Biogeochemistry in the Changing Arctic Ocean) at AWI and the Helmholtz Young Investigators Group SEAPUMP (Seasonal and regional food web interactions with the biological

Seismic station installed on drifting sea ice In the ice-covered Arctic Ocean we also use seismic land stations deployed on drifting ice floes to record small earthquakes. We optimized this method and

coastline. The project belongs to the EU Mission Restore our Ocean and Waters, and is a member of the Lighthouse for the Arctic and Atlantic Basin. Innovative solutions for marine restoration will [...] different environments across a latitudinal gradient, from the high-Arctic Svalbard at 79°N to the Madeira archipelago at 33°N. CLIMAREST will be developed on a latitudinal gradient representative of different

data throughout all seasons from the very remote regions in the Arctic and Antarctic. Our autonomous platforms, or more generally speaking ‘ice tethered platforms’, are installed on sea ice and in general [...] to continue monitoring the atmosphere, snow, sea ice, and upper ocean. Often, we simply call them ‘buoys’ although most of these systems are not able to float and depend on solid ice. We are using [...] used in various ways for many similar types of sensors utilized in ocean sciences, including a drogue to make the surface unit drift with the ocean currents and less with the wind. Our main application is