shoreline of Kongsfjord at the west coast of Spitsbergen, where ocean currents carry warm water from the North Atlantic Ocean. That means, the ocean warms the climate in Spitsbergen, which is why in summer the [...] Spitzbergen has risen by 1.3 °C. A warming of the Arctic, which becomes apparent especially in winter. The main climate influence in Ny-Ålesund is the Arctic Ozean. The scientific village is located right [...] -Institut are collecting these weather data with the help of meteorological observatories in the Arctic and Antarctic. Their data is coded after each measurement and transmitted to other research stations

better understand and quantify the role of clouds in the lower Arctic atmosphere. A special focus is on the amplified climate change in the Arctic. To that aim measurements during ACLOUD and AFLUX were/are [...] Airborne Observations In, Below and Above Arctic Clouds Map of the areas for aircraft operation illustration the coordination activities at Polarstern and Ny Alesund (Photo: Alfred-Wegener-Institut) ACLOUD [...] research institutes (listed below) embedded in the Transregional Collaborative Research Centre TR 172: ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms (AC)³

improve the understanding of polar atmospheric processes and their interactions with sea ice and ocean in the global context. We combine long term observations from ground stations and innovative measurements [...] improving the representation of polar processes in regional to global scale climate models. We run the Arctic research station AWIPEV on Svalbard and the meteorological and atmospheric observatory at the Antarctic

of sea-ice and ocean dynamics in the Laptev Sea and to investigate the ecological consequences of environmental changes in key regions of the transpolar drift, and to study effects of ocean acidification [...] Furthermore, the Deep-Sea Research Group leads the Helmholtz infrastructure project FRAM (Frontiers in Arctic marine Monitoring) and is also partner of the Helmholtz alliance ROBEX (Robotic Exploration of Extreme

Schepper What are the global impacts of an ice-free Arctic? How will the Arctic develop with increasing climate warming? What does an ice-free Arctic mean for our environment and our society? Researchers [...] surface uplift of the Andes, but also by changes in the oceanic circulation of the adjacent Pacific Ocean. The timing, forcings, and feedbacks of land-ocean coupling and their impact on the past hydroclimate [...] feedback mechanisms in the Arctic affect the phase shift of Arctic surface temperature. The function of each feedback will be quantified for understanding the physical processes of Arctic amplification underlying

S., Bracher A. (2025) Assessment of transparent exopolymer particles in the Arctic Ocean implemented into the coupled ocean-sea ice-biogeochemistry model FESOM2.1-REcOM. Geoscientific Model Development [...] depth in the Southern Ocean. In Proceedings of Ocean Optics XXI, Glasgow, United Kingdom, Oct 2012. Taylor B. B. , Taylor M. H., Dinter T., Bracher A. (2012) Intercomparison of ocean color products identifying [...] Oziel L., Karakus O., Sidorenko D., Völker C., Ye Y., Zeising M., Hauck J. (2023) Ocean biogeochemistry in the coupled ocean-sea ice-biogeochemistry model FESOM2.1-REcoM3. Geoscientific Model Development:

with the atmosphere and ocean. (Antarctic) Climate change Improved snow process formulations in climate models Investigation of the impact of changing atmospheric and oceanic processes on the evolution [...] S. , and Meyer, H.: Isotopic signatures of snow, sea ice, and surface seawater in the central Arctic Ocean during the MOSAiC expedition, Elementa: Science of the Anthropocene, 12, doi.org/10.1 [...] research will significantly improve our process understanding of Antarctic sea ice in the Southern Ocean climate system – from today’s perspective and for future warming climate scenarios. Background Snow

Thorium in the Arctic Ocean The Transarc expeditions together with earlier Polarstern campaigns have yielded a unique time series of the chemical and physical properties of the Central Arctic Ocean (CAO). Only [...] anthropogenic carbon is taken up by the ocean, and glacial ocean carbon storage in the deep Southern Ocean is well established ( Brovkin et al., 2012 ). Changes in Southern Ocean carbon uptake and its export to [...] of mud EXC 2077: The Ocean Floor – Earth’s Uncharted Interface The ocean floor, which makes up 71% of the Earth’s solid surface, lies an average of 3,700 meters beneath the ocean surface. The difficulties

Rachold /AWI) (Photo: Alfred Wegener Institut) What is submarine permafrost? Subsea permafrost in the Arctic is generally relict terrestrial permafrost, inundated after the last glaciation and now degrading [...] Beaufort Sea, we know little about the distribution of submarine permafrost for most of the shallow Arctic Shelf, over 80% of which lies offshore of Eastern Siberia. Degradation rates of the ice-bearing [...] concentration. We need to know more about the current distribution and state of permafrost beneath the ocean, about what cause sit thaw, where and how quickly. This group addresses key questions surrounding

Coastal permafrost erosion, organic carbon and nutrient release to the arctic nearshore zone (COPER) Permafrost Erosion Arctic permafrost coasts account for 34% of the coasts of the Earth and are extremely [...] matrix upon contact with seawater and are instantly washed away by incoming waves. With warming in the Arctic expected to be roughly two to four times as high as the global mean, sea ice extent is expected to [...] and changes to the nearshore food-web through the release of sediment and organic matter to the ocean. A comprehensive understanding of the processes at work at the local level is nonetheless still lacking