the Arctic Ocean. Additionally there is a strong change between 24 hours of light during summer and permanent darkness in polar night. Nature [...] the moorings and the Hausgarten into the Norwegian Sea and the Arctic Ocean. The Fram Strait connects the Arctic Ocean and the North Atlantic. Unlike the shallow water conjunction to the Pacific, this [...] deep and thus the main region for exchange of water between the Arctic and the global oceans. Due to its importance for the global ocean circulation the Fram Strait has long since been a focus area of

Energy Budgets Schematics of energ fluxes in ice covered oceans (Photo: Stefanie Arndt, AWI) The radiation budget of sea ice dominates the sea-ice energy balance and the exchange of energy between the atmosphere and the ocean in ice-covered regions. We are focusing on solar short-wave radiation and work on quantifying the amount of sun light that is [...] high-quality and comprehensive data sets from remote regions of the Arctic and Antarctic. Contact: Dr. Marcel Nicolaus Dr. Ran Tao Surface albedo of ice-covered regions in the Arctic and Antarctic mostly

. It also uncovers the various factors controlling this major Arctic surface current, including warmer temperatures which could increase the spread of human-made pollutants. The Transpolar Drift carries [...] suspended matter from the Siberian shelves across the central Arctic towards the Fram Strait channel, which connects to the Nordic Seas. This cross-Arctic flow influences the delivery of both natural [...] and heavy metals – from Siberian river systems into the central Arctic and the North Atlantic. This material affects Arctic biogeochemistry and ecosystems, while the fresh water itself alters ocean

) The properties of the atmosphere, sea-ice and the polar oceans, and feedbacks between these domains play an important role in global climate. At the same time, the seasonal evolution of sea-ice [...] buoy systems to record key parameters in the ice-covered, central Arctic Ocean. The concurrent recording of physical, biological and biogeochemical measurements in the atmosphere, sea-ice and ocean for [...] Rabe +49(471)4831-2403 Benjamin.Rabe @ awi.de Deployment of an ocean profilers in the sea-ice (Photo: Alfred-Wegener-Institut)

processes in the Arctic and Antarctic Oceans for a changing climate and the polar ecosystems. Polarstern in der Arktis / Polarstern in the Arctic Contact [...] Main research topics of our group Physical Oceanography of the Arctic Ocean The Arctic Ocean and the Nordic Seas are integral parts of the Atlantic meridional overturning circulation, and hence key [...] for the global climate. The perennial sea ice cover makes the Arctic Ocean distinct from subarctic oceans – the presence of… Find out more Ocean Optics Analytical bio-optical techniques are applied to

The winter growth period for sea ice in the Arctic Ocean is now over, with levels at a record low. The winter ice extent on 21 March 2025 was lower than at any time since continuous [...] kilometres below the long-term average. As in February 2025, average Arctic sea ice cover remained at an all-time low for the entire month of March, equalling the previous low set in 2017.

we determine the δ 18 O values in ice and water samples from the Arctic and Antarctic, as well as the δ 13 C values of dissolved inorganic carbon in the water of the polar oceans. In addition, our [...] δ 18 O (seawater) Capturing modern hydrological processes in the ocean (T,S, stratification); T-S-signatures of different water masses MAT253 + EA IsoLink CN (is in acquisition; available from autumn [...] the supply of nutrient silicon and its use in polar and subpolar ocean regions (e.g. Southern Ocean, North Pacific) can be reconstructed on geological time scales. For the measurements, pure diatom-,

southward, where they absorb heat and moisture over the open ocean. This perspective explains two different types of atmospheric conditions observed in winter during Arctic expeditions like MOSAiC: [...] change in the Arctic. On the one hand it is close to the Atlantic water inflow to the Central Arctic Ocean, and on the other hand it is located along [...] coordination of the station. Antarctic To be filled! Text is missing Arctic Ocean (Central Arctic) FS Polarstern MOSAiC (Photo: M. Gutsche) The polar oceans in the Arctic and around Antarctica, characterized

mapping initiatives including the General Bathymetric Chart of the Oceans (GEBCO) , the International Bathymetric Chart of the Arctic Ocean (IBCAO) ,the International Bathymetric Chart of the Southern Ocean [...] 2030) , a project with the ambitious goal to map the world’s oceans by 2030, and hosts the Seabed 2030 Southern Ocean Regional Center (SORC) . SORC’s and IBCSO’ s responsibility is to produce the best possible authoritative map of the Southern Ocean, the South Atlantic, South Pacific, and South Indian Ocean south of 50°S. The maps we produce are all publicly available in PANGAEA

the pathways of the oceanic circulation and the evolution and dynamic of ice sheets, which form a key component in the long-term simulation of palaeo-climate [...] form the base for new IODP/ICDP drill proposals. Formation of the Arctic Basin Polarstern for geophysics in the Arctic Ocean Research projects on the formation of the Arctic Ocean Development of the North [...] and its precursors? Follow this link Gateways of the Southern Ocean What was the effect of the opening of the gateways of the Southern Ocean? Lakes as climate archives Old lake-level terraces at the