Arctic Sea ice: Microstructure and geophysical processes Dr Hajo Eicken, Scientific Director of the Alfred Wegener Institute. Sea ice snow Arctic glaciology Sea-ice geophysics is a central research field [...] changes and ocean currents. Although these processes occur on very small spatial scales, they strongly affect the growth, stability, and decay of sea ice and thereby influence both Arctic ecosystems and [...] field within polar and climate sciences. Sea ice covers large parts of the Arctic and Antarctic and plays a key role in the Earth system by linking physical, ecological, and climatic processes. A particular

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 Pradhan, H [...] ed-grid ocean model under Earth System Modeling Framework, Ocean Modelling , 196, 102546, ​ doi:10.1016/j.ocemod.2025.102546 . Bunsen, F. , J. Hauck, L. Nerger , S. Torres-Valdés. (2025) Ocean carbon sink [...] (2018) Arctic-wide sea-ice thickness estimates from combining satellite remote sensing data and a dynamic ice-ocean model with data assimilation during the CryoSat-2 period. J. Geophys. Res. Oceans , 123

Eberhard.Sauter@awi.de
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in the Arctic Ocean (Photo: Esther Horvath) From the boreal forest and tundra to the deep ocean, Arctic Pulse 2027 follows the journey of water, carbon, and sediments across the entire land–ocean system [...] and ocean, Arctic Pulse provides a holistic view of how physical, biogeochemical, and ecological processes interact across the land-ocean interface. These transformations not only reshape Arctic ecosystems [...] freshwater, sediments, carbon, nutrients, and contaminants from land to ocean. These changes directly affect the Arctic ocean’s freshwater balance and circulation, sea-ice, marine food webs, greenhouse-gas

ecology of Arctic coasts Currently, global warming especially causes strong effects on Arctic ecosystems. We study the consequences of increasing water temperatures on species interactions in Arctic benthic [...] in financial support from the Interreg North-West Europe Programme. Exciting results Arctic burrowing Effects of Arctic lugworms Find out more Marine heatwaves Do you remember? Find out more Team PIs: Dr [...] benthic coastal communities. From these investigations we predict future scenarios for a warmer marine Arctic ecosystem and its species communites. Evolutionary Ecology Species invasions as a tool to study rapid

factors such as warming, nutrient deficiency or ocean acidification, by focusing on one of the most sensitive areas on Earth, the subarctic and Arctic Ocean. Thereby, we contribute to the Helmholtz research [...] greenhouse gas, rising CO 2 causes ocean warming: temperatures of the surface waters have already increased by 1.1°C on average, while some regions like the Arctic Ocean changing fastest (IPCC 2022). The [...] anthropogenic CO 2 is taken up by the ocean, concentrations of CO2 and bicarbonate increase while the concentration of carbonate ions and the pH decrease, also known as 'Ocean Acidification'. Just like warming

nutrients and carbonate chemistry parameters in the Fram Strait and the Central Arctic Ocean. To monitor such parameters in the ocean, it is common practice to analyze discrete water samples obtained e.g. by [...] productivity, strength of the biological carbon pump) are linked in the present-day and future Arctic ocean, as well as to which extent this relationship is driven by differences between functional groups [...] and where nutrients and CO 2 are distributed in the ocean, which has implications for primary and bacterial production and CO 2 uptake by the ocean. In order to understand how such biogeochemical cycles

Eurasian Basin of the Arctic Ocean using Imaging Flow Cytometry and PDMPO Judith Matz, M.Sc. Thesis title: Investigation of new and regenerated primary production during summer in Arctic Fjords using 13C and [...] Research Tatiana M. Torres (Photo: Gine Maccanti) Tatiana M. Torres, J.D./D.C.L/M.Sc. Project Manager of Ocean Gardens Research Scientist Dr. Miriam Philippi Miriam Philippi (Photo: Miriam Philippi) Marine bi [...] Antonia Thielecke, M.Sc. Antonia Thielecke (Photo: Ruben Schulte-Hillen) Thesis Title: Response of Arctic phytoplankton to declining silicic acid Project: SiDe-EFFECT Katharina (Katha) Paetz, M.Sc. Katha

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Am Handelshafen 12, 27570 Bremerhaven

the international level and within the framework of intergovernmental bodies (eg SCAR, IASC, ATCM, Arctic Council, CCAMLR, OSPAR). The office is coordinating the AWI contributions and will perform as an [...] d communication for inter-institutional networks (DAM, DKK, Helmholtz Climate, KDM, UN Decade of Ocean Science, IPCC, IPBES, Leopoldina, etc.), in which the research contributions of the AWI / of Helmholtz