Permafrost Profile About 34% of the world's coasts are affected by Arctic permafrost and are particularly sensitive to climate change. The frozen bluffs lose the cohesion provided by the permafrost matrix [...] food-web through the release of sediment and organic matter to the ocean. Survey-like studies on coastal erosion in the Arctic exist, but a comprehensive understanding of local processes is lacking, thus [...] expeditions Project EU Nunataryuk FLO CHAR COPER GTN-P EU PAGE21 Arctic Coastal Dynamics (ACD)

the one-year-long MOSAiC expedition and its research on the ocean, ice and atmosphere in the Arctic. Earlier this week, their predecessors from Leg 3 returned to Bremerhaven on board the research

majority of the exchange processes between the atmosphere and the ocean. The observed sea ice changes affect the climate and ecosystem, extending to our latitudes. The decline of Arctic sea ice in area [...] more > The Barents Observer | 28.07.2020 Sea ice extent in the Arctic reaches historical low in July Find out more > Carbon Brief | 18.11.2019 Inside MOSAiC: How a year-long Arctic expedition is helping [...] Keynote speech | 3.11.2021 Keynote speech on MOSAiC – the greatest Arctic expedition of our time 2021 United Nations Climate Change Conference Policy advice

Maccanti) Tatiana M. Torres, J.D./D.C.L/M.Sc. Project Manager of Ocean Gardens Technicians Lorenz Eckardt (Photo: Laurence Janßen) Lorenz Eckardt lorenzjohann.eckardt @ awi.de Research Scientist Dr. [...] investigate Diatom Silicification in the 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 15N Anna Naberhaus, M.Sc. Titel der Masterarbeit: Characterisation of the Arctic Phytoplankton community at

Sea Ice Remote Sensing Map of Arctic sea ice thickness (April 2015) obtained from CryoSat-2 data (Graphic: Alfred Wegener Institut) Contact: Dr. Stefan Hendricks The inaccessibility and sheer size of sea ice covered regions in the Arctic and Antarctic oceans make satellite remote sensing the only tool that is able to obtain a full picture of sea ice conditions. The [...] based on a radar altimeter that fully maps Antarctic sea ice and Arctic sea ice up to a latitude of 88°N. This coverage is unparalleled in comparison with all previous and existing satellite altimeters

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 within polar and climate sciences. Sea ice covers large parts of the Arctic [...] ice and thereby influence both Arctic ecosystems and large-scale feedbacks within the climate system. Beyond its role as a physical component of the climate system, sea

investigate Diatom Silicification in the Eurasian Basin of the Arctic Ocean using Imaging Flow Cytometry and PDMPO natasha.bryan @ awi.de ORCiD Alfred Wegener Institut Am Handelshafen 12 27570 Bremerhaven [...] Phytoplankton communities living inside and below sea ice in the Arctic and the Antarctic arefacing rapid changes due to ongoing climate change. Light and nutrient availability as well as shifts in grazing [...] obtained with the multispectral Imaging Flow Cytometer? How do Arctic phytoplankton communities differ from Antarctic communities in terms of their species composition, silicification degree and mixotrophy

including dead marine microorganisms, material transported to the oceans by rivers –the particles that trickle down are deposited layer by layer at depth. Ultimately, a unique archive is created, one that [...] aims of the various analyses is to determine how much carbon the ocean removed from the atmosphere and stored in its depths in the past. The permanently frozen soils of the Arctic store tremendous amounts [...] 440 KB Media Science Daily | 10.09.2018 Coastal erosion in the Arctic intensifies global warming Find out more > Dialogue & Lectures Policy advice

and vulnerable to future global warming. The potential of polar oceans and their marginal seas to amplify on a global scale warm climate conditions and sea level change through their temperature, sea [...] Establishment of sea surface temperature and sea ice records for the Arctic and Southern Ocean covering the MIS 5e warm interval.

Climate Modelling We investigate the coupled Arctic climate system with the overall aim to (i) improve our understanding and model representation of key climate processes in the Arctic [...] of key Arctic processes and feedbacks. A large body of evidence demonstrates how changes in the Arctic climate influence weather and climate at [...] in atmosphere, sea ice, and ocean, which are involved in interactions that play a major role in the coupled Arctic climate system. On the one hand, we apply the