Echo sounding for remote estimation of seabed temperatures on the Arctic Shelf
The East Siberian Arctic Shelf (ESAS) is a key area of CH4 venting in the Arctic Ocean. The ESAS region stores more than 80% of the world’s predicted subsea permafrost and associated permafrost-related gas hydrates. Gas emissions from subsea permafrost are controlled by its current thermal state, wh...
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fttomskstateuniv:koha:000996398 2023-05-15T14:48:10+02:00 Echo sounding for remote estimation of seabed temperatures on the Arctic Shelf Yusupov, Vladimir Salomatin, Aleksandr Shakhova, Natalia Chernykh, Denis Domaniuk, Anna Semiletov, Igor P. 2022 https://doi.org/10.3390/geosciences12090315 https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000996398 eng eng koha:000996398 doi:10.3390/geosciences12090315 https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000996398 Geosciences. 2022. Vol. 12, № 9. P. 315 (1-11) многолетняя подводная мерзлота температура выбросы метана Восточно-Сибирский арктический шельф дистанционная оценка морское дно статьи в журналах info:eu-repo/semantics/article 2022 fttomskstateuniv https://doi.org/10.3390/geosciences12090315 2023-02-21T17:36:36Z The East Siberian Arctic Shelf (ESAS) is a key area of CH4 venting in the Arctic Ocean. The ESAS region stores more than 80% of the world’s predicted subsea permafrost and associated permafrost-related gas hydrates. Gas emissions from subsea permafrost are controlled by its current thermal state, which, in turn, depends on environmental factors. The aim of the manuscript is to show that the thermal state of subsea permafrost and phase transitions of its pore moisture can be estimated remotely by echo soundings, which can resolve the structure of shallow bottom sediments. It has been found that the duration of the seabed acoustic response (echo duration, Δ) at frequencies of 50 and 200 kHz correlates with sediment temperatures and generally increases with cooling below 0.5 °C. This correlation, explained by assuming a layered structure of the bottom sediments, establishes the basis for high-frequency acoustic thermometry. The technique is an advantageous tool for many applications: fast contouring of low-temperature zones, remote measurements of seabed surface temperature, and estimation of the thickness of frozen sediments near the bottom. The latter estimates have implications for the distribution of subsea permafrost and the stability of gas hydrates on the Arctic shelf. Article in Journal/Newspaper Arctic Arctic Ocean permafrost Tomsk State University Research Library Arctic Arctic Ocean Geosciences 12 9 315 |
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Open Polar |
collection |
Tomsk State University Research Library |
op_collection_id |
fttomskstateuniv |
language |
English |
topic |
многолетняя подводная мерзлота температура выбросы метана Восточно-Сибирский арктический шельф дистанционная оценка морское дно |
spellingShingle |
многолетняя подводная мерзлота температура выбросы метана Восточно-Сибирский арктический шельф дистанционная оценка морское дно Yusupov, Vladimir Salomatin, Aleksandr Shakhova, Natalia Chernykh, Denis Domaniuk, Anna Semiletov, Igor P. Echo sounding for remote estimation of seabed temperatures on the Arctic Shelf |
topic_facet |
многолетняя подводная мерзлота температура выбросы метана Восточно-Сибирский арктический шельф дистанционная оценка морское дно |
description |
The East Siberian Arctic Shelf (ESAS) is a key area of CH4 venting in the Arctic Ocean. The ESAS region stores more than 80% of the world’s predicted subsea permafrost and associated permafrost-related gas hydrates. Gas emissions from subsea permafrost are controlled by its current thermal state, which, in turn, depends on environmental factors. The aim of the manuscript is to show that the thermal state of subsea permafrost and phase transitions of its pore moisture can be estimated remotely by echo soundings, which can resolve the structure of shallow bottom sediments. It has been found that the duration of the seabed acoustic response (echo duration, Δ) at frequencies of 50 and 200 kHz correlates with sediment temperatures and generally increases with cooling below 0.5 °C. This correlation, explained by assuming a layered structure of the bottom sediments, establishes the basis for high-frequency acoustic thermometry. The technique is an advantageous tool for many applications: fast contouring of low-temperature zones, remote measurements of seabed surface temperature, and estimation of the thickness of frozen sediments near the bottom. The latter estimates have implications for the distribution of subsea permafrost and the stability of gas hydrates on the Arctic shelf. |
format |
Article in Journal/Newspaper |
author |
Yusupov, Vladimir Salomatin, Aleksandr Shakhova, Natalia Chernykh, Denis Domaniuk, Anna Semiletov, Igor P. |
author_facet |
Yusupov, Vladimir Salomatin, Aleksandr Shakhova, Natalia Chernykh, Denis Domaniuk, Anna Semiletov, Igor P. |
author_sort |
Yusupov, Vladimir |
title |
Echo sounding for remote estimation of seabed temperatures on the Arctic Shelf |
title_short |
Echo sounding for remote estimation of seabed temperatures on the Arctic Shelf |
title_full |
Echo sounding for remote estimation of seabed temperatures on the Arctic Shelf |
title_fullStr |
Echo sounding for remote estimation of seabed temperatures on the Arctic Shelf |
title_full_unstemmed |
Echo sounding for remote estimation of seabed temperatures on the Arctic Shelf |
title_sort |
echo sounding for remote estimation of seabed temperatures on the arctic shelf |
publishDate |
2022 |
url |
https://doi.org/10.3390/geosciences12090315 https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000996398 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean permafrost |
genre_facet |
Arctic Arctic Ocean permafrost |
op_source |
Geosciences. 2022. Vol. 12, № 9. P. 315 (1-11) |
op_relation |
koha:000996398 doi:10.3390/geosciences12090315 https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000996398 |
op_doi |
https://doi.org/10.3390/geosciences12090315 |
container_title |
Geosciences |
container_volume |
12 |
container_issue |
9 |
container_start_page |
315 |
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1766319242053943296 |