Vulnerability of east Siberia's frozen carbon stores to future warming
International audience East Siberia's permafrost contains about 500 GtC of frozen highly labile carbon deposits, a so-called Yedoma. Using a permafrost carbon cycle model we analyzed mobilization of this huge carbon stock in a future warming. Conditions necessary to trigger the irreversible Yed...
Published in: | Geophysical Research Letters |
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Main Authors: | , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2008
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Online Access: | https://insu.hal.science/insu-00378479 https://insu.hal.science/insu-00378479/document https://insu.hal.science/insu-00378479/file/2008GL033639.pdf https://doi.org/10.1029/2008GL033639 |
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ftceafr:oai:HAL:insu-00378479v1 |
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openpolar |
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Open Polar |
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HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
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ftceafr |
language |
English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Khvorostyanov, D. Ciais, Philippe Krinner, Gerhard Zimov, S. A. Vulnerability of east Siberia's frozen carbon stores to future warming |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience East Siberia's permafrost contains about 500 GtC of frozen highly labile carbon deposits, a so-called Yedoma. Using a permafrost carbon cycle model we analyzed mobilization of this huge carbon stock in a future warming. Conditions necessary to trigger the irreversible Yedoma thawing maintained by deep respiration and methanogenesis are studied. Once started, this process could release 2.0–2.8 GtC yr−1 during years 2300–2400 transforming 75% of initial carbon stock into CO2 and methane. The time when the fast deep-soil decomposition starts is inversely proportional to the warming rate, while the corresponding (critical) temperature anomaly slightly increases at larger warming rates. This second-order effect is due to the deep-soil heat storage caused by external warming, which leads to more homogeneous soil heating when the warming is slower, and so a smaller external warming is needed to thaw the permafrost. The effect of specific microbial heat that accompanies oxic decomposition is of comparable importance to that of the warming rate on the critical temperature anomaly, while it is of minor importance on the time when deep decomposition starts. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) A.M.Obukhov Institute of Atmospheric Physics (IAP) Russian Academy of Sciences Moscow (RAS) ICOS-ATC (ICOS-ATC) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Northeast Science Station |
format |
Article in Journal/Newspaper |
author |
Khvorostyanov, D. Ciais, Philippe Krinner, Gerhard Zimov, S. A. |
author_facet |
Khvorostyanov, D. Ciais, Philippe Krinner, Gerhard Zimov, S. A. |
author_sort |
Khvorostyanov, D. |
title |
Vulnerability of east Siberia's frozen carbon stores to future warming |
title_short |
Vulnerability of east Siberia's frozen carbon stores to future warming |
title_full |
Vulnerability of east Siberia's frozen carbon stores to future warming |
title_fullStr |
Vulnerability of east Siberia's frozen carbon stores to future warming |
title_full_unstemmed |
Vulnerability of east Siberia's frozen carbon stores to future warming |
title_sort |
vulnerability of east siberia's frozen carbon stores to future warming |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://insu.hal.science/insu-00378479 https://insu.hal.science/insu-00378479/document https://insu.hal.science/insu-00378479/file/2008GL033639.pdf https://doi.org/10.1029/2008GL033639 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://insu.hal.science/insu-00378479 Geophysical Research Letters, 2008, 35 (L10703), 1 à 5 p. ⟨10.1029/2008GL033639⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2008GL033639 insu-00378479 https://insu.hal.science/insu-00378479 https://insu.hal.science/insu-00378479/document https://insu.hal.science/insu-00378479/file/2008GL033639.pdf doi:10.1029/2008GL033639 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2008GL033639 |
container_title |
Geophysical Research Letters |
container_volume |
35 |
container_issue |
10 |
_version_ |
1801381017839206400 |
spelling |
ftceafr:oai:HAL:insu-00378479v1 2024-06-09T07:48:59+00:00 Vulnerability of east Siberia's frozen carbon stores to future warming Khvorostyanov, D. Ciais, Philippe Krinner, Gerhard Zimov, S. A. Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) A.M.Obukhov Institute of Atmospheric Physics (IAP) Russian Academy of Sciences Moscow (RAS) ICOS-ATC (ICOS-ATC) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Northeast Science Station 2008 https://insu.hal.science/insu-00378479 https://insu.hal.science/insu-00378479/document https://insu.hal.science/insu-00378479/file/2008GL033639.pdf https://doi.org/10.1029/2008GL033639 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2008GL033639 insu-00378479 https://insu.hal.science/insu-00378479 https://insu.hal.science/insu-00378479/document https://insu.hal.science/insu-00378479/file/2008GL033639.pdf doi:10.1029/2008GL033639 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://insu.hal.science/insu-00378479 Geophysical Research Letters, 2008, 35 (L10703), 1 à 5 p. ⟨10.1029/2008GL033639⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2008 ftceafr https://doi.org/10.1029/2008GL033639 2024-05-16T14:35:30Z International audience East Siberia's permafrost contains about 500 GtC of frozen highly labile carbon deposits, a so-called Yedoma. Using a permafrost carbon cycle model we analyzed mobilization of this huge carbon stock in a future warming. Conditions necessary to trigger the irreversible Yedoma thawing maintained by deep respiration and methanogenesis are studied. Once started, this process could release 2.0–2.8 GtC yr−1 during years 2300–2400 transforming 75% of initial carbon stock into CO2 and methane. The time when the fast deep-soil decomposition starts is inversely proportional to the warming rate, while the corresponding (critical) temperature anomaly slightly increases at larger warming rates. This second-order effect is due to the deep-soil heat storage caused by external warming, which leads to more homogeneous soil heating when the warming is slower, and so a smaller external warming is needed to thaw the permafrost. The effect of specific microbial heat that accompanies oxic decomposition is of comparable importance to that of the warming rate on the critical temperature anomaly, while it is of minor importance on the time when deep decomposition starts. Article in Journal/Newspaper permafrost HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Geophysical Research Letters 35 10 |