Winter bis zum Mars Potsdamer Geo-Wissenschaftler unternehmen Expedition in die Eiseskälte des Permafrosts Potsdam/Sibirien. Mehrere Wochen bei Temperaturen bis minus 30 Grad, Schneeverwehungen mit Windstärke [...] die Bedingungen, die ein 22-köpfiges Team aus Potsdamer Wissenschaft- lern jetzt im sibirischen Permafrost vorfand, unterschieden sich schon ziemlich krass vom Frühlingsblü- hen in Brandenburg. „Man ge- [...] GFZ auf die geomikrobiologi- schen Arbeiten konzentriert, wer- den Ausmaß und Geschwindigkeit der Permafrost-Tauprozesse, also die Bodenveränderungen, die im Zuge steigender Temperatur auf- treten, vom AWI

Permafrost
Permafrost makes up a quarter of the landmass in the Northern Hemisphere. Climate change means that Arctic coasts are thawing and eroding at an ever greater pace, releasing additional greenhouse

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

sediments, documenting a former high stand of Lake Heihai. The fossil lake marls are affected by permafrost and disrupted by segregation ice. In the background, the glaciated peaks of the Kunlun Mountain

Permafrost
Beavers are highly effective ecosystem engineers: if a given landscape isn’t quite to their liking, they simply rearrange the terrain. And that’s what they’ve been doing for millennia in [...] to their findings, the animals could change entire ecosystems and contribute to the thawing of permafrost soils, as they report in the journal Global Change Biology.

Nature Communications Study
The loss of arctic permafrost deposits by coastal erosion could amplify climate warming via the greenhouse effect. A study using sediment samples from the Sea of Okhotsk [...] Okhotsk on the eastern coast of Russia led by AWI researchers revealed that the loss of Arctic permafrost at the end of the last glacial period led to repeated sudden increases in the carbon dioxide concentration

project KoPf - Carbon in permafrost Moderator T. Eckhardt 09:30-09:40 Eva-Maria Pfeiffer The KoPf project - Carbon in permafrost regions 09:40-10:00 Victor Brovkin Permafrost carbon dynamics in deglaciation [...] carbon turnover in eroding permafrost deposits of Kurungnakh Island, northeast Siberia 11.00-11.20 Evgeny Abakumov Molecular composition of soil organic matter of selected permafrost affected soils of the Russian [...] Sentinel-2 data for Arctic permafrost regions Josefine Walz Soil organic matter decomposition in Siberian tundra soils Sizhong Yang Microbial response to long-term permafrost thaw Janet Rethemeyer Tracing

apparent scars in the world’s permafrost regions. As the new global comparative study conducted by the international permafrost network GTN-P shows, in all regions with permafrost soils the temperature of the

Background: Methods and Preliminary Results: Simulating rapid permafrost degradation and erosion processes under a warming climate Model setup:Permafrost under a warming Climate: Current State and Further Development [...] slump dynamics. Current distribution of permafrost on the northern hemisphere. Current Land Surface Models (LSMs) used to simulate the degradation of permafrost under a warming climate only consider o [...] abundant form of thaw in many regions. Photographs showing typical features of permafrost degradation in the Arctic. Permafrost thaw is usually associated with intensive erosion and mass wasting. Schematic

Spaceborne platforms Kartierung und Fernerkundung Permafrost in einem sich erwärmenden Klima Deadhorse, Prudhoe Bay Churchill, Manitoba Lena Delta, Sibirien Permafrost in Landoberflächen-Modellen Modellierung Photo: [...] of permafrost temperatures in a tundra lowland landscape. Remote Sensing of Environment 135, 12–24. Westermann et al., 2016: Simulating the thermal regime and thaw processes of ice-rich permafrost ground [...] Churchill, einem Zentrum für arktischen Tourismus, leben um die 900 Einwohner. Die Stadt ist auf Permafrost gebaut. Mit unseren Arbeiten wollen wir dazu beitragen, geeignete Anpassungsstrategien für die