How the insulating properties of snow affect soil carbon distribution in the continental pan-Arctic area
International audience We demonstrate the effect of an ecosystem differentiated insulation by snow on the soil thermal regime and on the terrestrial soil carbon distribution in the pan‐Arctic area. This is done by means of a sensitivity study performed with the land surface model ORCHIDEE, which fur...
Published in: | Journal of Geophysical Research: Biogeosciences |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2012
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Online Access: | https://hal.science/hal-02929382 https://hal.science/hal-02929382/document https://hal.science/hal-02929382/file/2011JG001916.pdf https://doi.org/10.1029/2011JG001916 |
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Institut national des sciences de l'Univers: HAL-INSU |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Gouttevin, I. Menegoz, M. Domine, F. Krinner, G. Koven, C. Ciais, Philippe Tarnocai, C. Boike, J. How the insulating properties of snow affect soil carbon distribution in the continental pan-Arctic area |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience We demonstrate the effect of an ecosystem differentiated insulation by snow on the soil thermal regime and on the terrestrial soil carbon distribution in the pan‐Arctic area. This is done by means of a sensitivity study performed with the land surface model ORCHIDEE, which furthermore provides a first quantification of this effect. Based on field campaigns reporting higher thermal conductivities and densities for the tundra snowpack than for taiga snow, two distributions of near‐equilibrium soil carbon stocks are computed, one relying on uniform snow thermal properties and the other using ecosystem‐differentiated snow thermal properties. Those modeled distributions strongly depend on soil temperature through decomposition processes. Considering higher insulation by snow in taiga areas induces warmer soil temperatures by up to 12 K in winter at 50 cm depth. This warmer soil signal persists over summer with a temperature difference of up to 4 K at 50 cm depth, especially in areas exhibiting a thick, enduring snow cover. These thermal changes have implications on the modeled soil carbon stocks, which are reduced by 8% in the pan‐Arctic continental area when the vegetation‐induced variations of snow thermal properties are accounted for. This is the result of diverse and spatially heterogeneous ecosystem processes: where higher soil temperatures lift nitrogen limitation on plant productivity, tree plant functional types thrive whereas light limitation and enhanced water stress are the new constrains on lower vegetation, resulting in a reduced net productivity at the pan‐Arctic scale. Concomitantly, higher soil temperatures yield increased respiration rates (+22% over the study area) and result in reduced permafrost extent and deeper active layers which expose greater volumes of soil to microbial decomposition. The three effects combine to produce lower soil carbon stocks in the pan‐Arctic terrestrial area. Our study highlights the role of snow in combination with vegetation in shaping the ... |
author2 |
AgroParisTech 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) 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) Lawrence Berkeley National Laboratory Berkeley (LBNL) 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)) Agriculture and Agri-Food (AAFC) Alfred Wegener Institute for Polar and Marine Research (AWI) |
format |
Article in Journal/Newspaper |
author |
Gouttevin, I. Menegoz, M. Domine, F. Krinner, G. Koven, C. Ciais, Philippe Tarnocai, C. Boike, J. |
author_facet |
Gouttevin, I. Menegoz, M. Domine, F. Krinner, G. Koven, C. Ciais, Philippe Tarnocai, C. Boike, J. |
author_sort |
Gouttevin, I. |
title |
How the insulating properties of snow affect soil carbon distribution in the continental pan-Arctic area |
title_short |
How the insulating properties of snow affect soil carbon distribution in the continental pan-Arctic area |
title_full |
How the insulating properties of snow affect soil carbon distribution in the continental pan-Arctic area |
title_fullStr |
How the insulating properties of snow affect soil carbon distribution in the continental pan-Arctic area |
title_full_unstemmed |
How the insulating properties of snow affect soil carbon distribution in the continental pan-Arctic area |
title_sort |
how the insulating properties of snow affect soil carbon distribution in the continental pan-arctic area |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-02929382 https://hal.science/hal-02929382/document https://hal.science/hal-02929382/file/2011JG001916.pdf https://doi.org/10.1029/2011JG001916 |
genre |
Arctic permafrost taiga Tundra |
genre_facet |
Arctic permafrost taiga Tundra |
op_source |
ISSN: 2169-8953 Journal of Geophysical Research: Biogeosciences https://hal.science/hal-02929382 Journal of Geophysical Research: Biogeosciences, 2012, 117 (G2), pp.n/a-n/a. ⟨10.1029/2011JG001916⟩ |
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op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2011JG001916 |
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Journal of Geophysical Research: Biogeosciences |
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ftinsu:oai:HAL:hal-02929382v1 2024-04-28T08:07:46+00:00 How the insulating properties of snow affect soil carbon distribution in the continental pan-Arctic area Gouttevin, I. Menegoz, M. Domine, F. Krinner, G. Koven, C. Ciais, Philippe Tarnocai, C. Boike, J. AgroParisTech 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) 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) Lawrence Berkeley National Laboratory Berkeley (LBNL) 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)) Agriculture and Agri-Food (AAFC) Alfred Wegener Institute for Polar and Marine Research (AWI) 2012-06 https://hal.science/hal-02929382 https://hal.science/hal-02929382/document https://hal.science/hal-02929382/file/2011JG001916.pdf https://doi.org/10.1029/2011JG001916 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2011JG001916 hal-02929382 https://hal.science/hal-02929382 https://hal.science/hal-02929382/document https://hal.science/hal-02929382/file/2011JG001916.pdf doi:10.1029/2011JG001916 info:eu-repo/semantics/OpenAccess ISSN: 2169-8953 Journal of Geophysical Research: Biogeosciences https://hal.science/hal-02929382 Journal of Geophysical Research: Biogeosciences, 2012, 117 (G2), pp.n/a-n/a. ⟨10.1029/2011JG001916⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2012 ftinsu https://doi.org/10.1029/2011JG001916 2024-04-05T00:40:57Z International audience We demonstrate the effect of an ecosystem differentiated insulation by snow on the soil thermal regime and on the terrestrial soil carbon distribution in the pan‐Arctic area. This is done by means of a sensitivity study performed with the land surface model ORCHIDEE, which furthermore provides a first quantification of this effect. Based on field campaigns reporting higher thermal conductivities and densities for the tundra snowpack than for taiga snow, two distributions of near‐equilibrium soil carbon stocks are computed, one relying on uniform snow thermal properties and the other using ecosystem‐differentiated snow thermal properties. Those modeled distributions strongly depend on soil temperature through decomposition processes. Considering higher insulation by snow in taiga areas induces warmer soil temperatures by up to 12 K in winter at 50 cm depth. This warmer soil signal persists over summer with a temperature difference of up to 4 K at 50 cm depth, especially in areas exhibiting a thick, enduring snow cover. These thermal changes have implications on the modeled soil carbon stocks, which are reduced by 8% in the pan‐Arctic continental area when the vegetation‐induced variations of snow thermal properties are accounted for. This is the result of diverse and spatially heterogeneous ecosystem processes: where higher soil temperatures lift nitrogen limitation on plant productivity, tree plant functional types thrive whereas light limitation and enhanced water stress are the new constrains on lower vegetation, resulting in a reduced net productivity at the pan‐Arctic scale. Concomitantly, higher soil temperatures yield increased respiration rates (+22% over the study area) and result in reduced permafrost extent and deeper active layers which expose greater volumes of soil to microbial decomposition. The three effects combine to produce lower soil carbon stocks in the pan‐Arctic terrestrial area. Our study highlights the role of snow in combination with vegetation in shaping the ... Article in Journal/Newspaper Arctic permafrost taiga Tundra Institut national des sciences de l'Univers: HAL-INSU Journal of Geophysical Research: Biogeosciences 117 G2 n/a n/a |