Assessing the Potential for Mobilization of Old Soil Carbon After Permafrost Thaw: A Synthesis of 14 C Measurements From the Northern Permafrost Region
International audience The magnitude of future emissions of greenhouse gases from the northern permafrost region depends crucially on the mineralization of soil organic carbon (SOC) that has accumulated over millennia in these perennially frozen soils. Many recent studies have used radiocarbon (14 C...
Published in: | Global Biogeochemical Cycles |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2020
|
Subjects: | |
Online Access: | https://hal.science/hal-03420668 https://hal.science/hal-03420668/document https://hal.science/hal-03420668/file/2020GB006672.pdf https://doi.org/10.1029/2020gb006672 |
id |
ftunivnantes:oai:HAL:hal-03420668v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes Estop‐aragonés, Cristian Olefeldt, David Abbott, Benjamin, Chanton, Jeffrey, Czimczik, Claudia, Dean, Joshua, Egan, Jocelyn, Gandois, Laure Garnett, Mark, Hartley, Iain, Hoyt, Alison Lupascu, Massimo Natali, Susan, O'Donnell, Jonathan, Raymond, Peter, Tanentzap, Andrew, Tank, Suzanne, Schuur, Edward, Turetsky, Merritt Anthony, Katey Assessing the Potential for Mobilization of Old Soil Carbon After Permafrost Thaw: A Synthesis of 14 C Measurements From the Northern Permafrost Region |
topic_facet |
[SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience The magnitude of future emissions of greenhouse gases from the northern permafrost region depends crucially on the mineralization of soil organic carbon (SOC) that has accumulated over millennia in these perennially frozen soils. Many recent studies have used radiocarbon (14 C) to quantify the release of this "old" SOC as CO 2 or CH 4 to the atmosphere or as dissolved and particulate organic carbon (DOC and POC) to surface waters. We compiled~1,900 14 C measurements from 51 sites in the northern permafrost region to assess the vulnerability of thawing SOC in tundra, forest, peatland, lake, and river ecosystems. We found that growing season soil 14 C-CO 2 emissions generally had a modern (post-1950s) signature, but that well-drained, oxic soils had increased CO 2 emissions derived from older sources following recent thaw. The age of CO 2 and CH 4 emitted from lakes depended primarily on the age and quantity of SOC in sediments and on the mode of emission, and indicated substantial losses of previously frozen SOC from actively expanding thermokarst lakes. Increased fluvial export of aged DOC and POC occurred from sites where permafrost thaw caused soil thermal erosion. There was limited evidence supporting release of previously frozen SOC as CO 2 , CH 4 , and DOC from thawing peatlands with anoxic soils. This synthesis thus suggests widespread but not universal release of permafrost SOC following thaw. We show that different definitions of "old" sources among studies hamper the comparison of vulnerability of permafrost SOC across ecosystems and disturbances. We also highlight opportunities for future 14 C studies in the permafrost region. |
author2 |
Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement (INEE) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) Université Fédérale Toulouse Midi-Pyrénées |
format |
Article in Journal/Newspaper |
author |
Estop‐aragonés, Cristian Olefeldt, David Abbott, Benjamin, Chanton, Jeffrey, Czimczik, Claudia, Dean, Joshua, Egan, Jocelyn, Gandois, Laure Garnett, Mark, Hartley, Iain, Hoyt, Alison Lupascu, Massimo Natali, Susan, O'Donnell, Jonathan, Raymond, Peter, Tanentzap, Andrew, Tank, Suzanne, Schuur, Edward, Turetsky, Merritt Anthony, Katey |
author_facet |
Estop‐aragonés, Cristian Olefeldt, David Abbott, Benjamin, Chanton, Jeffrey, Czimczik, Claudia, Dean, Joshua, Egan, Jocelyn, Gandois, Laure Garnett, Mark, Hartley, Iain, Hoyt, Alison Lupascu, Massimo Natali, Susan, O'Donnell, Jonathan, Raymond, Peter, Tanentzap, Andrew, Tank, Suzanne, Schuur, Edward, Turetsky, Merritt Anthony, Katey |
author_sort |
Estop‐aragonés, Cristian |
title |
Assessing the Potential for Mobilization of Old Soil Carbon After Permafrost Thaw: A Synthesis of 14 C Measurements From the Northern Permafrost Region |
title_short |
Assessing the Potential for Mobilization of Old Soil Carbon After Permafrost Thaw: A Synthesis of 14 C Measurements From the Northern Permafrost Region |
title_full |
Assessing the Potential for Mobilization of Old Soil Carbon After Permafrost Thaw: A Synthesis of 14 C Measurements From the Northern Permafrost Region |
title_fullStr |
Assessing the Potential for Mobilization of Old Soil Carbon After Permafrost Thaw: A Synthesis of 14 C Measurements From the Northern Permafrost Region |
title_full_unstemmed |
Assessing the Potential for Mobilization of Old Soil Carbon After Permafrost Thaw: A Synthesis of 14 C Measurements From the Northern Permafrost Region |
title_sort |
assessing the potential for mobilization of old soil carbon after permafrost thaw: a synthesis of 14 c measurements from the northern permafrost region |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03420668 https://hal.science/hal-03420668/document https://hal.science/hal-03420668/file/2020GB006672.pdf https://doi.org/10.1029/2020gb006672 |
genre |
permafrost Thermokarst Tundra |
genre_facet |
permafrost Thermokarst Tundra |
op_source |
ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-03420668 Global Biogeochemical Cycles, 2020, 34, ⟨10.1029/2020gb006672⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2020gb006672 hal-03420668 https://hal.science/hal-03420668 https://hal.science/hal-03420668/document https://hal.science/hal-03420668/file/2020GB006672.pdf doi:10.1029/2020gb006672 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2020gb006672 |
container_title |
Global Biogeochemical Cycles |
container_volume |
34 |
container_issue |
9 |
_version_ |
1766163664889446400 |
spelling |
ftunivnantes:oai:HAL:hal-03420668v1 2023-05-15T17:55:41+02:00 Assessing the Potential for Mobilization of Old Soil Carbon After Permafrost Thaw: A Synthesis of 14 C Measurements From the Northern Permafrost Region Estop‐aragonés, Cristian Olefeldt, David Abbott, Benjamin, Chanton, Jeffrey, Czimczik, Claudia, Dean, Joshua, Egan, Jocelyn, Gandois, Laure Garnett, Mark, Hartley, Iain, Hoyt, Alison Lupascu, Massimo Natali, Susan, O'Donnell, Jonathan, Raymond, Peter, Tanentzap, Andrew, Tank, Suzanne, Schuur, Edward, Turetsky, Merritt Anthony, Katey Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement (INEE) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) Université Fédérale Toulouse Midi-Pyrénées 2020-09 https://hal.science/hal-03420668 https://hal.science/hal-03420668/document https://hal.science/hal-03420668/file/2020GB006672.pdf https://doi.org/10.1029/2020gb006672 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2020gb006672 hal-03420668 https://hal.science/hal-03420668 https://hal.science/hal-03420668/document https://hal.science/hal-03420668/file/2020GB006672.pdf doi:10.1029/2020gb006672 info:eu-repo/semantics/OpenAccess ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-03420668 Global Biogeochemical Cycles, 2020, 34, ⟨10.1029/2020gb006672⟩ [SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2020 ftunivnantes https://doi.org/10.1029/2020gb006672 2023-02-22T02:44:40Z International audience The magnitude of future emissions of greenhouse gases from the northern permafrost region depends crucially on the mineralization of soil organic carbon (SOC) that has accumulated over millennia in these perennially frozen soils. Many recent studies have used radiocarbon (14 C) to quantify the release of this "old" SOC as CO 2 or CH 4 to the atmosphere or as dissolved and particulate organic carbon (DOC and POC) to surface waters. We compiled~1,900 14 C measurements from 51 sites in the northern permafrost region to assess the vulnerability of thawing SOC in tundra, forest, peatland, lake, and river ecosystems. We found that growing season soil 14 C-CO 2 emissions generally had a modern (post-1950s) signature, but that well-drained, oxic soils had increased CO 2 emissions derived from older sources following recent thaw. The age of CO 2 and CH 4 emitted from lakes depended primarily on the age and quantity of SOC in sediments and on the mode of emission, and indicated substantial losses of previously frozen SOC from actively expanding thermokarst lakes. Increased fluvial export of aged DOC and POC occurred from sites where permafrost thaw caused soil thermal erosion. There was limited evidence supporting release of previously frozen SOC as CO 2 , CH 4 , and DOC from thawing peatlands with anoxic soils. This synthesis thus suggests widespread but not universal release of permafrost SOC following thaw. We show that different definitions of "old" sources among studies hamper the comparison of vulnerability of permafrost SOC across ecosystems and disturbances. We also highlight opportunities for future 14 C studies in the permafrost region. Article in Journal/Newspaper permafrost Thermokarst Tundra Université de Nantes: HAL-UNIV-NANTES Global Biogeochemical Cycles 34 9 |