Current rates and mechanisms of subsea permafrost degradation in the East Siberian Arctic Shelf
The rates of subsea permafrost degradation and occurrence of gas-migration pathways are key factors controlling the East Siberian Arctic Shelf (ESAS) methane (CH4) emissions, yet these factors still require assessment. It is thought that after inundation, permafrost-degradation rates would decrease...
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ftpubmed:oai:pubmedcentral.nih.gov:5489687 2023-05-15T14:47:52+02:00 Current rates and mechanisms of subsea permafrost degradation in the East Siberian Arctic Shelf Shakhova, Natalia Semiletov, Igor Gustafsson, Orjan Sergienko, Valentin Lobkovsky, Leopold Dudarev, Oleg Tumskoy, Vladimir Grigoriev, Michael Mazurov, Alexey Salyuk, Anatoly Ananiev, Roman Koshurnikov, Andrey Kosmach, Denis Charkin, Alexander Dmitrevsky, Nicolay Karnaukh, Victor Gunar, Alexey Meluzov, Alexander Chernykh, Denis 2017-06-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5489687/ http://www.ncbi.nlm.nih.gov/pubmed/28639616 https://doi.org/10.1038/ncomms15872 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5489687/ http://www.ncbi.nlm.nih.gov/pubmed/28639616 http://dx.doi.org/10.1038/ncomms15872 Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2017 ftpubmed https://doi.org/10.1038/ncomms15872 2017-07-09T00:08:56Z The rates of subsea permafrost degradation and occurrence of gas-migration pathways are key factors controlling the East Siberian Arctic Shelf (ESAS) methane (CH4) emissions, yet these factors still require assessment. It is thought that after inundation, permafrost-degradation rates would decrease over time and submerged thaw-lake taliks would freeze; therefore, no CH4 release would occur for millennia. Here we present results of the first comprehensive scientific re-drilling to show that subsea permafrost in the near-shore zone of the ESAS has a downward movement of the ice-bonded permafrost table of ∼14 cm year−1 over the past 31–32 years. Our data reveal polygonal thermokarst patterns on the seafloor and gas-migration associated with submerged taliks, ice scouring and pockmarks. Knowing the rate and mechanisms of subsea permafrost degradation is a prerequisite to meaningful predictions of near-future CH4 release in the Arctic. Text Arctic Ice permafrost Thermokarst PubMed Central (PMC) Arctic Nature Communications 8 1 |
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Article |
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Article Shakhova, Natalia Semiletov, Igor Gustafsson, Orjan Sergienko, Valentin Lobkovsky, Leopold Dudarev, Oleg Tumskoy, Vladimir Grigoriev, Michael Mazurov, Alexey Salyuk, Anatoly Ananiev, Roman Koshurnikov, Andrey Kosmach, Denis Charkin, Alexander Dmitrevsky, Nicolay Karnaukh, Victor Gunar, Alexey Meluzov, Alexander Chernykh, Denis Current rates and mechanisms of subsea permafrost degradation in the East Siberian Arctic Shelf |
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Article |
description |
The rates of subsea permafrost degradation and occurrence of gas-migration pathways are key factors controlling the East Siberian Arctic Shelf (ESAS) methane (CH4) emissions, yet these factors still require assessment. It is thought that after inundation, permafrost-degradation rates would decrease over time and submerged thaw-lake taliks would freeze; therefore, no CH4 release would occur for millennia. Here we present results of the first comprehensive scientific re-drilling to show that subsea permafrost in the near-shore zone of the ESAS has a downward movement of the ice-bonded permafrost table of ∼14 cm year−1 over the past 31–32 years. Our data reveal polygonal thermokarst patterns on the seafloor and gas-migration associated with submerged taliks, ice scouring and pockmarks. Knowing the rate and mechanisms of subsea permafrost degradation is a prerequisite to meaningful predictions of near-future CH4 release in the Arctic. |
format |
Text |
author |
Shakhova, Natalia Semiletov, Igor Gustafsson, Orjan Sergienko, Valentin Lobkovsky, Leopold Dudarev, Oleg Tumskoy, Vladimir Grigoriev, Michael Mazurov, Alexey Salyuk, Anatoly Ananiev, Roman Koshurnikov, Andrey Kosmach, Denis Charkin, Alexander Dmitrevsky, Nicolay Karnaukh, Victor Gunar, Alexey Meluzov, Alexander Chernykh, Denis |
author_facet |
Shakhova, Natalia Semiletov, Igor Gustafsson, Orjan Sergienko, Valentin Lobkovsky, Leopold Dudarev, Oleg Tumskoy, Vladimir Grigoriev, Michael Mazurov, Alexey Salyuk, Anatoly Ananiev, Roman Koshurnikov, Andrey Kosmach, Denis Charkin, Alexander Dmitrevsky, Nicolay Karnaukh, Victor Gunar, Alexey Meluzov, Alexander Chernykh, Denis |
author_sort |
Shakhova, Natalia |
title |
Current rates and mechanisms of subsea permafrost degradation in the East Siberian Arctic Shelf |
title_short |
Current rates and mechanisms of subsea permafrost degradation in the East Siberian Arctic Shelf |
title_full |
Current rates and mechanisms of subsea permafrost degradation in the East Siberian Arctic Shelf |
title_fullStr |
Current rates and mechanisms of subsea permafrost degradation in the East Siberian Arctic Shelf |
title_full_unstemmed |
Current rates and mechanisms of subsea permafrost degradation in the East Siberian Arctic Shelf |
title_sort |
current rates and mechanisms of subsea permafrost degradation in the east siberian arctic shelf |
publisher |
Nature Publishing Group |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5489687/ http://www.ncbi.nlm.nih.gov/pubmed/28639616 https://doi.org/10.1038/ncomms15872 |
geographic |
Arctic |
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Arctic |
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Arctic Ice permafrost Thermokarst |
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Arctic Ice permafrost Thermokarst |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5489687/ http://www.ncbi.nlm.nih.gov/pubmed/28639616 http://dx.doi.org/10.1038/ncomms15872 |
op_rights |
Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/ncomms15872 |
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Nature Communications |
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8 |
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1 |
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