The East Siberian Arctic Shelf: towards further assessment of permafrost-related methane fluxes and role of sea ice
Sustained release of methane (CH 4 ) to the atmosphere from thawing Arctic permafrost may be a positive and significant feedback to climate warming. Atmospheric venting of CH 4 from the East Siberian Arctic Shelf (ESAS) was recently reported to be on par with flux from the Arctic tundra; however, th...
Published in: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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Online Access: | http://dx.doi.org/10.1098/rsta.2014.0451 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2014.0451 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2014.0451 |
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crroyalsociety:10.1098/rsta.2014.0451 2024-10-13T14:04:40+00:00 The East Siberian Arctic Shelf: towards further assessment of permafrost-related methane fluxes and role of sea ice Shakhova, Natalia Semiletov, Igor Sergienko, Valentin Lobkovsky, Leopold Yusupov, Vladimir Salyuk, Anatoly Salomatin, Alexander Chernykh, Denis Kosmach, Denis Panteleev, Gleb Nicolsky, Dmitry Samarkin, Vladimir Joye, Samantha Charkin, Alexander Dudarev, Oleg Meluzov, Alexander Gustafsson, Orjan 2015 http://dx.doi.org/10.1098/rsta.2014.0451 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2014.0451 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2014.0451 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 373, issue 2052, page 20140451 ISSN 1364-503X 1471-2962 journal-article 2015 crroyalsociety https://doi.org/10.1098/rsta.2014.0451 2024-09-23T04:22:21Z Sustained release of methane (CH 4 ) to the atmosphere from thawing Arctic permafrost may be a positive and significant feedback to climate warming. Atmospheric venting of CH 4 from the East Siberian Arctic Shelf (ESAS) was recently reported to be on par with flux from the Arctic tundra; however, the future scale of these releases remains unclear. Here, based on results of our latest observations, we show that CH 4 emissions from this shelf are likely to be determined by the state of subsea permafrost degradation. We observed CH 4 emissions from two previously understudied areas of the ESAS: the outer shelf, where subsea permafrost is predicted to be discontinuous or mostly degraded due to long submergence by seawater, and the near shore area, where deep/open taliks presumably form due to combined heating effects of seawater, river run-off, geothermal flux and pre-existing thermokarst. CH 4 emissions from these areas emerge from largely thawed sediments via strong flare-like ebullition, producing fluxes that are orders of magnitude greater than fluxes observed in background areas underlain by largely frozen sediments. We suggest that progression of subsea permafrost thawing and decrease in ice extent could result in a significant increase in CH 4 emissions from the ESAS. Article in Journal/Newspaper Arctic Ice permafrost Sea ice Thermokarst Tundra The Royal Society Arctic Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 373 2052 20140451 |
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Open Polar |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
Sustained release of methane (CH 4 ) to the atmosphere from thawing Arctic permafrost may be a positive and significant feedback to climate warming. Atmospheric venting of CH 4 from the East Siberian Arctic Shelf (ESAS) was recently reported to be on par with flux from the Arctic tundra; however, the future scale of these releases remains unclear. Here, based on results of our latest observations, we show that CH 4 emissions from this shelf are likely to be determined by the state of subsea permafrost degradation. We observed CH 4 emissions from two previously understudied areas of the ESAS: the outer shelf, where subsea permafrost is predicted to be discontinuous or mostly degraded due to long submergence by seawater, and the near shore area, where deep/open taliks presumably form due to combined heating effects of seawater, river run-off, geothermal flux and pre-existing thermokarst. CH 4 emissions from these areas emerge from largely thawed sediments via strong flare-like ebullition, producing fluxes that are orders of magnitude greater than fluxes observed in background areas underlain by largely frozen sediments. We suggest that progression of subsea permafrost thawing and decrease in ice extent could result in a significant increase in CH 4 emissions from the ESAS. |
format |
Article in Journal/Newspaper |
author |
Shakhova, Natalia Semiletov, Igor Sergienko, Valentin Lobkovsky, Leopold Yusupov, Vladimir Salyuk, Anatoly Salomatin, Alexander Chernykh, Denis Kosmach, Denis Panteleev, Gleb Nicolsky, Dmitry Samarkin, Vladimir Joye, Samantha Charkin, Alexander Dudarev, Oleg Meluzov, Alexander Gustafsson, Orjan |
spellingShingle |
Shakhova, Natalia Semiletov, Igor Sergienko, Valentin Lobkovsky, Leopold Yusupov, Vladimir Salyuk, Anatoly Salomatin, Alexander Chernykh, Denis Kosmach, Denis Panteleev, Gleb Nicolsky, Dmitry Samarkin, Vladimir Joye, Samantha Charkin, Alexander Dudarev, Oleg Meluzov, Alexander Gustafsson, Orjan The East Siberian Arctic Shelf: towards further assessment of permafrost-related methane fluxes and role of sea ice |
author_facet |
Shakhova, Natalia Semiletov, Igor Sergienko, Valentin Lobkovsky, Leopold Yusupov, Vladimir Salyuk, Anatoly Salomatin, Alexander Chernykh, Denis Kosmach, Denis Panteleev, Gleb Nicolsky, Dmitry Samarkin, Vladimir Joye, Samantha Charkin, Alexander Dudarev, Oleg Meluzov, Alexander Gustafsson, Orjan |
author_sort |
Shakhova, Natalia |
title |
The East Siberian Arctic Shelf: towards further assessment of permafrost-related methane fluxes and role of sea ice |
title_short |
The East Siberian Arctic Shelf: towards further assessment of permafrost-related methane fluxes and role of sea ice |
title_full |
The East Siberian Arctic Shelf: towards further assessment of permafrost-related methane fluxes and role of sea ice |
title_fullStr |
The East Siberian Arctic Shelf: towards further assessment of permafrost-related methane fluxes and role of sea ice |
title_full_unstemmed |
The East Siberian Arctic Shelf: towards further assessment of permafrost-related methane fluxes and role of sea ice |
title_sort |
east siberian arctic shelf: towards further assessment of permafrost-related methane fluxes and role of sea ice |
publisher |
The Royal Society |
publishDate |
2015 |
url |
http://dx.doi.org/10.1098/rsta.2014.0451 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2014.0451 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2014.0451 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice permafrost Sea ice Thermokarst Tundra |
genre_facet |
Arctic Ice permafrost Sea ice Thermokarst Tundra |
op_source |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 373, issue 2052, page 20140451 ISSN 1364-503X 1471-2962 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsta.2014.0451 |
container_title |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
container_volume |
373 |
container_issue |
2052 |
container_start_page |
20140451 |
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1812810042865352704 |