the working group Wolfgang Dierking Website Stefanie Linow Topics Sea ice drift and deformation Permafrost Polynias Ice shelf and icebergs Snow accumulation What is remote sensing? Typical for remote sensing [...] research? In our group we focus on the ice sheets of Antarctica and Greenland, on sea ice, and on permafrost regions. Typical questions are: Which sea ice types can be separated in radar images? How do polynyas [...] and deformation? Which sensor combinations are optimal for classification of land cover units in permafrost regions? How can we retrieve snow accumulation rates from satellite data? The results of our analyses

ice-wedge ground-ice bodies constitute the 25 m high and more than kilometer long Yedoma cliff Permafrost thaw at the cliff edge Sunset with seagull Jacob's-ladder with bumblebee Forget-me-not (myosotis [...] coalesced alases surrounded by eroding yedoma uplands Sampling of peat horizons for reconstruction of permafrost thaw history Tundra walk with sledge, samples, shovel, and gas drill Active layer measurements

BMWi funding) and Validation : ESA CCI Permafrost Validation team for the Permafrost_cci Products circumarctic Ground Temperature, Active Layer Thickness, Permafrost Probability our main activities: qualitative

Networks Permafrost Carbon Network: www.permafrostcarbon.org IPA Action Group Yedoma Carbon: ipa.arcticportal.org/images/stories/AG_reports/AG4_for_website.pdf PYRN (Permafrost Young Researchers [...] Institute of Earth Sciences Russia Northeast Science Station, Cherskii Dr. Sergei Zimov Mel'nikov Permafrost Institute, Russian Academy of Sciences, Siberian Branch, Yakutsk Dr. Alexandr Fedorov, Dr. Pavel

three languages (Photo: Alfred-Wegener-Institut) Siberian permafrost ecosystems in transition - over 25 years of joint research Siberian permafrost and the ecosystems there are of global importance due to [...] Institute Helmholtz Centre for Polar and Marine Research (AWI), Bremerhaven and Potsdam Melnikov Permafrost Institute, Siberian Branch, Russian Academy of Science (MPI SB RAS), Yakutsk German Centre for [...] with the climate. For more than 25 years we have been researching the interrelationships between permafrost, biodiversity and climate in close and friendly cooperation. With joint Arctic expeditions, jointly

thawing in permafrost regions, e.g. in Sibiria. CH4 introduces a significant feedback mechanism to the climate change problem, as global warming leads to a poleward retreat of vast permafrost regions in

seasonal temperature and precipitation dynamics as key driver of permafrost changes in East Siberia. To this end, caves and permafrost exposure will be studied in East Siberia along a transect from the [...] different types of relict permafrost ice, (iii) Deduce changes in seasonality, moisture dynamics, and continentality based on results from objectives 1 and 2, and corresponding permafrost response to climate [...] Marent , engineer Mikaela Weiner (CTA) Projects, Cooperations, Networking Reconstructing Siberian permafrost dynamics using stable and clumped isotopes (IsoPerm) (2021-2025) This joint project with Northumbria

strongly. 2.7 CryoGrid 3 Xice – a simple representation of permafrost thaw processes in ice-rich permafrost Excess ground-ice melt: in many permafrost landscapes, ground layers super-saturated with ice occur [...] n CryoGrid 3 Xice -- a simple representation of permafrost thaw processes in ice-rich permafrost Study area The Lena River delta The Samoylov permafrost observatory CryoGrid 3 runs for the Lena River delta [...] phenomena in fu- ture projections of permafrost thaw and subsequent climatic- triggered feedbacks. In this study, we present a new land- surface scheme designed for permafrost applications, Cryo- Grid 3, which

seasonal temperature and precipitation dynamics as key driver of permafrost changes in East Siberia. To this end, caves and permafrost exposure will be studied in East Siberia along a transect from the [...] different types of relict permafrost ice, (iii) Deduce changes in seasonality, moisture dynamics, and continentality based on results from objectives 1 and 2, and corresponding permafrost response to climate [...] orientation of research projects include scientific applications of stable isotope methods in permafrost research, palaeoclimate studies, by also in the fields of limnology, hydrology, ecology and glaciology

temporal resolution in the Elbe estuary. Another hot spot of unknown magnitude is the rapid thawing of permafrost soils and sediments in the arctic region. In In the framework of MOSES and in cooperation with [...] institutes (AWI-Periglacial Research, GFZ, Geomar) we plan to assess the influence of rapidly thawing permafrost on the distribution of methane in the aquatic environment. Especially the winter situation, the