TY - JOUR
T1 - Sonar estimation of methane bubble flux from thawing subsea permafrost
T2 - A case study from the laptev sea shelf
AU - Chernykh, Denis
AU - Yusupov, Vladimir
AU - Salomatin, Aleksandr
AU - Kosmach, Denis
AU - Shakhova, Natalia
AU - Gershelis, Elena
AU - Konstantinov, Anton
AU - Grinko, Andrey
AU - Chuvilin, Evgeny
AU - Dudarev, Oleg
AU - Koshurnikov, Andrey
AU - Semiletov, Igor
N1 - Funding Information:
Funding: The research was supported by the Russian Science Foundation grants 18-77-10004 and 19-77-00067. Acknowledge the Russian Government (Grant No. 14, Z50.31.0012/03.19.2014). TPU Competitiveness Enhancement Program #VIU/OG-215/2020 and #VIU/OG-217/2020. The Grant of the President of the Russian Federation for state support of young Russian scientists—candidates of science (#MK-535.2020.5).
Publisher Copyright:
© 2020 by the authors.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/10
Y1 - 2020/10
N2 - Seeps found offshore in the East Siberian Arctic Shelf may mark zones of degrading subsea permafrost and related destabilization of gas hydrates. Sonar surveys provide an effective tool for mapping seabed methane fluxes and monitoring subsea Arctic permafrost seepage. The paper presents an overview of existing approaches to sonar estimation of methane bubble flux from the sea floor to the water column and a new method for quantifying CH4 ebullition. In the suggested method, the flux of methane bubbles is estimated from its response to insonification using the backscattering cross section. The method has demonstrated its efficiency in the case study of single- and multi-beam acoustic surveys of a large seep field on the Laptev Sea shelf.
AB - Seeps found offshore in the East Siberian Arctic Shelf may mark zones of degrading subsea permafrost and related destabilization of gas hydrates. Sonar surveys provide an effective tool for mapping seabed methane fluxes and monitoring subsea Arctic permafrost seepage. The paper presents an overview of existing approaches to sonar estimation of methane bubble flux from the sea floor to the water column and a new method for quantifying CH4 ebullition. In the suggested method, the flux of methane bubbles is estimated from its response to insonification using the backscattering cross section. The method has demonstrated its efficiency in the case study of single- and multi-beam acoustic surveys of a large seep field on the Laptev Sea shelf.
KW - Active acoustic survey
KW - East siberian arctic shelf
KW - Laptev sea
KW - Permafrost
KW - Seeps
KW - Taliks
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U2 - 10.3390/geosciences10100411
DO - 10.3390/geosciences10100411
M3 - Article
AN - SCOPUS:85092891700
VL - 10
SP - 1
EP - 14
JO - Geosciences (Switzerland)
JF - Geosciences (Switzerland)
SN - 2076-3263
IS - 10
M1 - 411
ER -