climbing temperatures. In addition, the rivers are carrying large amounts of sediment from thawing permafrost. How the Arctic Ocean will react to such changes is a very big question, which is concerning scientists

ten times that of the equator. Thawing permafrost Two-thirds of Arctic coasts are not rock, but rather permanently frozen soft soil – better known as “permafrost”. Approximately half of the Earth´s carbon [...] carbon are stored underground, and this is mainly contained in the permafrost soils of the northern hemisphere. When permafrost thaws, also as a result of climate change, car- bon dioxide and methane are [...] for example submarine permafrost. Rising wa- ter temperatures could also cause this ice mass to thaw. In the western Laptev Sea in Siberia, for instance, the submarine permafrost currently has a temperature

l«:iess.p~e{ 1 .11. 0~. ao-tl- Klim ~ .is- .agase aus dem Permafrost Schier endlos ziehen sich Eis und Schnee über das Delta des Lena-Stroms hin, der hoch im Norden Sibiriens in die Lap­ tewsee und ins [...] s'cheint weit entfernt zu sein. Und doch wirken sich die weltwejt steigenden Temperaturen auch auf den Permafrost­ boden aus: Weil im sibirischen Boden un­ zählige Reste von Tieren und Pflanzen aus vergangenen

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