and temporal variation in deep-sea meiofauna at the LTER Observatory HAUSGARTEN in Fram Strait (Arctic Ocean). MDPI - Diversity 12 (7). doi: 10.3390/d12070279 Käß, M., Vedenin, A., Hasemann, C., Brandt, [...] biomass of three epibenthic invertebrates from the deep-sea observatory HAUSGARTEN (Fram Strait, Arctic Ocean). Marine Ecology-Progress Series 602: 15-29. Grzelak, K., Kotwicki, L., Hasemann, C., Soltwedel [...] assessing temporal variations in benthic community structure, megafaunal composition and diversity at the Arctic deep-sea observatory HAUSGARTEN between 2004 and 2015. Deep-Sea Research I 122: 81-94. Vedenin, A

expedition to the Arctic Ocean. Over the next two months, an international research team will analyse the feedback effects between global warming and sea ice retreat in the Arctic Ocean. Find out more Event [...] more UN Ocean Conference 2025 Find out more En route to a global UN agreement against the plastic flood Find out more UN Decade of Ocean Science Find out more MOSAiC expedition: one year in the Arctic Ocean [...] main drivers of this development is thought to be warming of Atlantic water that flows into the Arctic Ocean.… Find out more Short notices FH Münster students visiting the AWI 02. July 2025 Accompanied by

On 29 May 2025, the Polarstern research vessel set sail from Bremerhaven for the Arctic. The destination of the 95 expedition participants, led by the Alfred Wegener Institute, is the AWI Hausgarten, a [...] y situated between Svalbard and Greenland. There they will investigate how the ecosystems of the Arctic deep sea are reacting to changing environmental conditions as a result of rapid climate change. The [...] June, will focus on benthic and plankton communities in the open water and physical changes in the ocean.

Press release

Arctic
The Arctic Ocean was once a gigantic freshwater lake. Only after the land bridge between Greenland and Scotland had submerged far enough did vast quantities of salt water pour in from the Atlantic

www.kepler-polar.eu EU Arctic Policy ● KEPLER represents the needs of users in all 3 pillars of the integrated EU policy for the Arctic ○ Climate Change and Safeguarding the Arctic Environment ■ Strongly [...] Maritime Monitoring GA: 821984 www.kepler-polar.eu Why KEPLER? ● Large changes in Arctic and Antarctic climate, on land, in the ocean and in the atmosphere ○ Contributing to an ‘opening up’ of the Polar Regions [...] Regions that has important socio-economic, environmental and security implications ■ Arctic Ocean will be increasingly accessible and more broadly used by those seeking the its abundant resources and trade

necessary to obtain a unique parameter set! ● Ocean observation (T & S) can be used to provide further constraint Parameter optimization of Arctic sea ice-ocean model by a micro-GA Experiment design ● An [...] Germany 2 Ocean Atmosphere Systems, Hamburg, Germany 3Jacobs University, Bremen, Germany Sumata, H., F. Kauker, M. Karcher, and R. Gerdes. (2019), Simultaneous parameter optimization of an Arctic sea ice-ocean [...] Arctic sea ice-ocean model, Mon. Wea. Rev., doi:10.1175/MWR-D-18-0375.1. Simultaneous optimization of Arctic sea-ice model parameters by a genetic algorithm Outline 1. Motivation / Objective 2. Method /

Assessing the contribution of ocean and sea ice initialization for seasonal predictionin the Arctic , Madlen Kimmritz Assimilation of sea ice freeboard observations into an ocean and ice analysis and forecast [...] zone from ocean gravity wave attenuation, Giacomo De Carolis Sea Ice Concentration uncertainties , Rasmus Tonboe Sea-ice thickness and snow depth observations from satellite altimeters in Arctic and Antarctica [...] and results) Sea ice observations and uncertainties Sea ice model parameterizations and coupling to ocean and atmosphere models Verification approaches for sea ice analyses and forecasts Automated prediction

forecasts Cyril Palerme, Malte Müller, Arne Melsom Evaluation of the ice edge position in the European Arctic - Several verification scores have recently been suggested for evaluating the ice edge position - [...] between the ice edge lengths from the two data sets (observations and forecasts) Melsom et al., 2019 (Ocean Science) Influence of the length of the ice edges on the verification scores ⇒ The SPS is correlated [...] l Research Letters, 46, 4757–4763 23 Slide 1 Evaluation of the ice edge position in the European Arctic Datasets Sea ice probability (SIP) Modified Hausdorff Distance (MHD) Spatial Probability Score (SPS

the Eurasian shelf seas. Ocean waters with salinities below the average salinity of the Arctic Ocean also contribute positively to the fresh water balance of the Arctic Ocean. Such waters flow in from [...] er-Institut) Figure 1: Surface circulation of the Arctic Ocean (Graphic: Alfred-Wegener-Institut) Figure 2: Mid-depth circulation in the Arctic Ocean, which is fed from the Atlantic. 129 Iodine releases [...] blue line shows the total Arctic (liquid + sea ice) freshwater content (integrated in the area in blue on the map) (Graphic: T. Kovacz, Alfred-Wegener-Institut) The Arctic Ocean receives freshwater by run-off