becoming more frequent and intense. The Arctic Ocean also suffers from this development: The absence of sea ice will lead to more extreme fluctuations in ocean temperatures, with abrupt temperature changes [...] Wegener Institute shows how marine heatwaves will also become much more intense and frequent in the Arctic in the 21st century. With drastic consequences for the ecosystem. The researchers published their

Polarstern Core Repository The section Marine Geology curates and archives sediment cores from both polar oceans which were taken by RV Polarstern since 1983. The collection comprises more than 4000 cores from [...] Roberts Project are also maintained by the AWI repository. Lacustrine sediments cored from lakes in the Arctic and Antarctic are archived by the section Polar Terrestrial Environmental Systems at AWI Potsdam

Tallinna Tehnikaülikool (Estonia) Gronlands Naturinstitut (Greenland) Arctic Monitoring and Assessment Programme Secretariat World Ocean Council EU-PolarNet Participants (Photo: Alfred Wegener Institut)

Broad expanses of the Arctic Ocean and the Southern Ocean in the Antarctic are covered in sea ice. The ice plays a vital role in our climate system and is an important component of Arctic and Antarctic habitats [...] most frequently takes place in the Arctic and Antarctic. Depending on the season, the ice covers greater or lesser parts of the ocean. In the Northern Hemisphere, the ocean gradually freezes over in the course [...] its highest extent in September. In summer, the Southern Ocean is virtually ice-free. The research aircraft Polar 6 flies over the Arctic Ocean during a sea ice thickness campagne. (Photo: Esther Horvath)

sea-ice cover on the Arctic Ocean in summer, to higher water and air temperatures, and to rising sea levels. Less sea ice means e.g. that winds produce larger waves, which batter Arctic coasts. On average [...] further thawing be prevented? To FAQ element Can permafrost only be found on land? Since the ocean floor in the Arctic is insulated by water and sea ice, one might assume there was no permafrost there. But guess [...] latitudes of the Arctic and Antarctic, a minor rise is enough to set off thawing. To FAQ element Why are permafrost coasts increasingly collapsing? Coastal erosion has worsened in the Arctic over the past

Currents transport plastic debris through the ocean, allowing it to accumulate even in remote areas like the Arctic. Unlike beach debris, the plastics in the ocean cannot be readily removed – and breaks down [...] intense research have shown that garbage can be found throughout the world’s oceans. Even in the most remote parts of the ocean, like the polar regions or the bottom of the deep sea, we can find large amounts [...] element Where does plastic debris end up? A great deal of the debris in and on the ocean ends up on beaches or the ocean floor. Especially deep-sea trenches have essentially become deposition sites for large

part of projects such as FRAM, LTER HAUSGARTEN, PEBCAO in different regions of the Arctic Ocean. The main goal of our arctic research is to understand and follow seasonal and interannual fluctuations of particle [...] , Angelina Kraft, Gordon Lax, Eva-Maria Nöthig Research The Arctcic Ocean reacts more sensitive to Gloabal Change than other oceans. Sea ice strongly decraeses, temperatures rise at least twice as much [...] months. While in FRAM strait and on the arctic shelves, a relatively high proportion of biomass was being observed, the proportion of biomass in central Arctic, sea ice covered waters is relatively low

airborne survey in the Arctic , AWI, press release Time surveys and neckties at Dinner , New York Times The Tech Ice Hunters Use to Track the Arctic Melt , Wall Street Journal Measuring Arctic Ice Melt from the [...] erived radar freeboard of Arctic sea ice. Geophysical Research Letters , 50, e2022GL100696. doi.org/10.1029/2022GL100696 Shi, H. et al . (2023), Estimation of Arctic Winter Snow Depth, Sea Ice [...] Mamnun, N. , Liu, X. and Nerger, L. (2023): Improving Arctic sea-ice thickness estimates with the assimilation of CryoSat-2 summer observations , Ocean-Land-Atmosphere Research, 2 . doi: 10.34133/olar.0025

increased to 1 km in the whole Arctic Ocean and further refined to subkilometer scales at the MOSAiC sites. The decades-long eddy-resolving model results for the Arctic Ocean and the well-evaluated and documented [...] variability of the Arctic Ocean and the cryosphere on time scales of decades to millennia and to use these results to robustly assess the impact of projected future climate changes on the Arctic. Deniz Aydin [...] Changing Arctic" (EPICA) is a BMBF funded project that will use high-resolution modeling and observations to understand the properties and impacts of (sub)mesoscale eddies in the Arctic Ocean, especially

several decades of experience in ocean simulation and earned an international reputation for developing the global ocean/sea-ice model FESOM, which doesn’t divide the ocean’s surface into regular quadrilaterals [...] makes it possible to model specific ocean regions – those where deep water forms, or those with an abundance of eddies, like the Gulf Stream and the Southern Ocean – in impressive detail. At the same time [...] 340 KB Media Phys.org | 25.12.2019 Can Arctic 'ice management' combat climate change? Find out more > Euronews Green | 22.11.2019 Walking on thin ice in the Arctic? Find out more > Dialogue & Lectures Policy