Sonar estimation of methane bubble flux from thawing subsea permafrost: A case study from the laptev sea shelf

Abstract

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.

Original language	English
Article number	411
Pages (from-to)	1-14
Number of pages	14
Journal	Geosciences (Switzerland)
Volume	10
Issue number	10
DOIs	https://doi.org/10.3390/geosciences10100411
Publication status	Published - Oct 2020

Keywords

Active acoustic survey
East siberian arctic shelf
Laptev sea
Permafrost
Seeps
Taliks

ASJC Scopus subject areas

Earth and Planetary Sciences(all)

Access to Document

10.3390/geosciences10100411

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Chernykh, D., Yusupov, V., Salomatin, A., Kosmach, D., Shakhova, N., Gershelis, E., Konstantinov, A., Grinko, A., Chuvilin, E., Dudarev, O., Koshurnikov, A., & Semiletov, I. (2020). Sonar estimation of methane bubble flux from thawing subsea permafrost: A case study from the laptev sea shelf. Geosciences (Switzerland), 10(10), 1-14. [411]. https://doi.org/10.3390/geosciences10100411

Sonar estimation of methane bubble flux from thawing subsea permafrost : A case study from the laptev sea shelf. / Chernykh, Denis; Yusupov, Vladimir; Salomatin, Aleksandr; Kosmach, Denis; Shakhova, Natalia; Gershelis, Elena; Konstantinov, Anton; Grinko, Andrey; Chuvilin, Evgeny; Dudarev, Oleg; Koshurnikov, Andrey; Semiletov, Igor.

In: Geosciences (Switzerland), Vol. 10, No. 10, 411, 10.2020, p. 1-14.

Research output: Contribution to journal › Article › peer-review

Chernykh, D, Yusupov, V, Salomatin, A, Kosmach, D, Shakhova, N, Gershelis, E, Konstantinov, A, Grinko, A, Chuvilin, E, Dudarev, O, Koshurnikov, A & Semiletov, I 2020, 'Sonar estimation of methane bubble flux from thawing subsea permafrost: A case study from the laptev sea shelf', Geosciences (Switzerland), vol. 10, no. 10, 411, pp. 1-14. https://doi.org/10.3390/geosciences10100411

Chernykh, Denis ; Yusupov, Vladimir ; Salomatin, Aleksandr ; Kosmach, Denis ; Shakhova, Natalia ; Gershelis, Elena ; Konstantinov, Anton ; Grinko, Andrey ; Chuvilin, Evgeny ; Dudarev, Oleg ; Koshurnikov, Andrey ; Semiletov, Igor. / Sonar estimation of methane bubble flux from thawing subsea permafrost : A case study from the laptev sea shelf. In: Geosciences (Switzerland). 2020 ; Vol. 10, No. 10. pp. 1-14.

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title = "Sonar estimation of methane bubble flux from thawing subsea permafrost: A case study from the laptev sea shelf",

abstract = "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.",

keywords = "Active acoustic survey, East siberian arctic shelf, Laptev sea, Permafrost, Seeps, Taliks",

author = "Denis Chernykh and Vladimir Yusupov and Aleksandr Salomatin and Denis Kosmach and Natalia Shakhova and Elena Gershelis and Anton Konstantinov and Andrey Grinko and Evgeny Chuvilin and Oleg Dudarev and Andrey Koshurnikov and Igor Semiletov",

note = "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: {\textcopyright} 2020 by the authors. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

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AU - Gershelis, Elena

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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.

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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.

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