Vulnerability of permafrost carbon to global warming. Part I: model description and role of heat generated by organic matter decomposition
International audience We constructed a new model to study the sensitivity of permafrost carbon stocks to future climate warming. The one-dimensional model solves an equation for diffusion of heat penetrating from the overlying atmosphere and takes into account additional in situ heat production by...
Published in: | Tellus B: Chemical and Physical Meteorology |
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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-00378489 https://insu.hal.science/insu-00378489/document https://insu.hal.science/insu-00378489/file/Vulnerability%20of%20permafrost%20carbon%20to%20global%20warming%20Part%20I%20model%20description%20and%20role%20of%20heat%20generated%20by%20organic%20matter%20decomposition.pdf https://doi.org/10.1111/j.1600-0889.2007.00333.x |
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[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
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[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Khvorostyanov, D. Ciais, Philippe Krinner, Gerhard Heimann, M. Zimov, S. A. Vulnerability of permafrost carbon to global warming. Part I: model description and role of heat generated by organic matter decomposition |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience We constructed a new model to study the sensitivity of permafrost carbon stocks to future climate warming. The one-dimensional model solves an equation for diffusion of heat penetrating from the overlying atmosphere and takes into account additional in situ heat production by active soil microorganisms. Decomposition of frozen soil organic matter and produced CO2 and methane fluxes result from an interplay of soil heat conduction and phase transitions, respiration, methanogenesis and methanotrophy processes. Respiration and methanotrophy consume soil oxygen and thus can only develop in an aerated top-soil column. In contrast, methanogenesis is not limited by oxygen and can be sustained within the deep soil, releasing sufficient heat to further thaw in depth the frozen carbon-rich soil organic matter. Heat production that accompanies decomposition and methanotrophy can be an essential process providing positive feedback to atmospheric warming through self-sustaining transformation of initially frozen soil carbon into CO2 and CH4. This supplementary heat becomes crucial, however, only under certain climate conditions. Oxygen limitation to soil respiration slows down the process, so that the mean flux of carbon released during the phase of intense decomposition is more than two times less than without oxygen limitation. Taking into account methanogenesis increases the mean carbon flux by 20%. Part II of this study deals with mobilization of frozen carbon stock in transient climate change scenarios with more elaborated methane module, which makes it possible to consider more general cases with various site configurations. Part I (this manuscript) studies mobilization of 400 GtC carbon stock of the Yedoma in response to a stepwise rapid warming focusing on the role of supplementary heat that is released to the soil during decomposition of organic matter. |
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) 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) 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)) Max Planck Institute for Biogeochemistry (MPI-BGC) Max-Planck-Gesellschaft Northeast Science Station |
format |
Article in Journal/Newspaper |
author |
Khvorostyanov, D. Ciais, Philippe Krinner, Gerhard Heimann, M. Zimov, S. A. |
author_facet |
Khvorostyanov, D. Ciais, Philippe Krinner, Gerhard Heimann, M. Zimov, S. A. |
author_sort |
Khvorostyanov, D. |
title |
Vulnerability of permafrost carbon to global warming. Part I: model description and role of heat generated by organic matter decomposition |
title_short |
Vulnerability of permafrost carbon to global warming. Part I: model description and role of heat generated by organic matter decomposition |
title_full |
Vulnerability of permafrost carbon to global warming. Part I: model description and role of heat generated by organic matter decomposition |
title_fullStr |
Vulnerability of permafrost carbon to global warming. Part I: model description and role of heat generated by organic matter decomposition |
title_full_unstemmed |
Vulnerability of permafrost carbon to global warming. Part I: model description and role of heat generated by organic matter decomposition |
title_sort |
vulnerability of permafrost carbon to global warming. part i: model description and role of heat generated by organic matter decomposition |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://insu.hal.science/insu-00378489 https://insu.hal.science/insu-00378489/document https://insu.hal.science/insu-00378489/file/Vulnerability%20of%20permafrost%20carbon%20to%20global%20warming%20Part%20I%20model%20description%20and%20role%20of%20heat%20generated%20by%20organic%20matter%20decomposition.pdf https://doi.org/10.1111/j.1600-0889.2007.00333.x |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
ISSN: 0280-6509 EISSN: 1600-0889 Tellus B - Chemical and Physical Meteorology https://insu.hal.science/insu-00378489 Tellus B - Chemical and Physical Meteorology, 2008, 60 (2), pp.250 à 264. ⟨10.1111/j.1600-0889.2007.00333.x⟩ |
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info:eu-repo/semantics/OpenAccess |
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https://doi.org/10.1111/j.1600-0889.2007.00333.x |
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Tellus B: Chemical and Physical Meteorology |
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ftinsu:oai:HAL:insu-00378489v1 2024-04-28T08:35:58+00:00 Vulnerability of permafrost carbon to global warming. Part I: model description and role of heat generated by organic matter decomposition Khvorostyanov, D. Ciais, Philippe Krinner, Gerhard Heimann, M. 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) 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) 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)) Max Planck Institute for Biogeochemistry (MPI-BGC) Max-Planck-Gesellschaft Northeast Science Station 2008 https://insu.hal.science/insu-00378489 https://insu.hal.science/insu-00378489/document https://insu.hal.science/insu-00378489/file/Vulnerability%20of%20permafrost%20carbon%20to%20global%20warming%20Part%20I%20model%20description%20and%20role%20of%20heat%20generated%20by%20organic%20matter%20decomposition.pdf https://doi.org/10.1111/j.1600-0889.2007.00333.x en eng HAL CCSD Taylor & Francis info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1600-0889.2007.00333.x insu-00378489 https://insu.hal.science/insu-00378489 https://insu.hal.science/insu-00378489/document https://insu.hal.science/insu-00378489/file/Vulnerability%20of%20permafrost%20carbon%20to%20global%20warming%20Part%20I%20model%20description%20and%20role%20of%20heat%20generated%20by%20organic%20matter%20decomposition.pdf doi:10.1111/j.1600-0889.2007.00333.x info:eu-repo/semantics/OpenAccess ISSN: 0280-6509 EISSN: 1600-0889 Tellus B - Chemical and Physical Meteorology https://insu.hal.science/insu-00378489 Tellus B - Chemical and Physical Meteorology, 2008, 60 (2), pp.250 à 264. ⟨10.1111/j.1600-0889.2007.00333.x⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2008 ftinsu https://doi.org/10.1111/j.1600-0889.2007.00333.x 2024-04-05T00:40:08Z International audience We constructed a new model to study the sensitivity of permafrost carbon stocks to future climate warming. The one-dimensional model solves an equation for diffusion of heat penetrating from the overlying atmosphere and takes into account additional in situ heat production by active soil microorganisms. Decomposition of frozen soil organic matter and produced CO2 and methane fluxes result from an interplay of soil heat conduction and phase transitions, respiration, methanogenesis and methanotrophy processes. Respiration and methanotrophy consume soil oxygen and thus can only develop in an aerated top-soil column. In contrast, methanogenesis is not limited by oxygen and can be sustained within the deep soil, releasing sufficient heat to further thaw in depth the frozen carbon-rich soil organic matter. Heat production that accompanies decomposition and methanotrophy can be an essential process providing positive feedback to atmospheric warming through self-sustaining transformation of initially frozen soil carbon into CO2 and CH4. This supplementary heat becomes crucial, however, only under certain climate conditions. Oxygen limitation to soil respiration slows down the process, so that the mean flux of carbon released during the phase of intense decomposition is more than two times less than without oxygen limitation. Taking into account methanogenesis increases the mean carbon flux by 20%. Part II of this study deals with mobilization of frozen carbon stock in transient climate change scenarios with more elaborated methane module, which makes it possible to consider more general cases with various site configurations. Part I (this manuscript) studies mobilization of 400 GtC carbon stock of the Yedoma in response to a stepwise rapid warming focusing on the role of supplementary heat that is released to the soil during decomposition of organic matter. Article in Journal/Newspaper permafrost Institut national des sciences de l'Univers: HAL-INSU Tellus B: Chemical and Physical Meteorology 60 2 250 264 |