Giant seafloor craters formed by hydrate-controlled large-scale methane expulsion from the Arctic seafloor after ice sheet retreat

Karin Andreassen1, Alun Hubbard1, Henry Patton1, Sunil Vadakkepuliyambatta2, Monica Winsborrow1, Andreia Aletia Plaza-Faverola3 and Pavel Serov3, (1)CAGE - Centre for Arctic Gas Hydrate, Environment and Climate, UiT The Arctic University of Norway, Department of Geoscience, Tromsø, Norway, (2)UiT The Arctic University of Norway, CAGE-Centre for Arctic Gas Hydrate, Environment, and Climate, Dept. of Geoscience, Tromso, Norway, (3)CAGE - Centre for Arctic Gas Hydrate, Environment and Climate, UiT The Arctic University of Norway, Tromsø, Norway