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THERMAL CONDUCTIVITY OF BOTTOM SEDIMENTS IN THE EAST SIBERIAN ARCTIC SEAS: A CASE STUDY IN THE BUOR-KHAYA BAY
Session: Laboratory and Insitu Testing in Cold Regions / Essais en laboratoires et essais in situ pour les régions nordiques
Evgeny Chuvilin, Moscow State University (Russia)
Boris Bukhanov, Skolkovo Institute of Science and Technology (Skoltech) (Russia)
Sergey Grebenkin, Moscow State University (Russia)
Vladimir Tymskoy, Moscow State University (Russia)
Natalia Shakhova, International Arctic Research Center, University of Alaska (United States)
Oleg Dudarev, Il'ichev Pacific Institute of Oceanology (Russia)
Igor Semiletov, International Arctic Research Center, University of Alaska (United States)
Among Arctic carbon reservoirs, subsea permafrost, hydrates, and associated methane (CH4) deposits are the most worrisome owing to high heat transfer from rapidly warming shallow Arctic seas. The East Siberian Arctic Shelf is a big portion of the Arctic shelf and hosts over 80% of current subsea permafrost and along with it, unique Arctic shallow CH4 hydrates. Degradation of subsea permafrost results in increasing permeability for gaseous CH4 long preserved in seabed deposits within and beneath permafrost. Nevertheless, knowledge about the present thermal state of subsea permafrost is mainly based on modeling results, which are controversial. In that sense, actual values of thermal conductivity are crucially needed. In this report, we represent the first results of in situ measurements of the major sediment core thermodynamically parameters in the ESAS.
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