Reconstruction of the carbon isotopic composition of methane over the last 50 yr based on firn air measurements at 11 polar sites
International audience Methane is a strong greenhouse gas and large uncertainties exist concerning the future evolution of its atmospheric abundance. Analyzing methane atmospheric mixing and stable isotope ratios in air trapped in polar ice sheets helps reconstructing the evolution of its sources an...
Main Authors: | , , , , , , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2012
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Online Access: | https://hal.archives-ouvertes.fr/hal-00821201 https://doi.org/10.5194/acpd-12-9587-2012 |
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ftccsdartic:oai:HAL:hal-00821201v1 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Sapart, C.J. Martinerie, Patricia Chappellaz, Jérôme Van De Wal, R.S.W. Sperlich, P. Van Der Veen, C. Bernard, Serge Sturges, W. T. Blunier, T. Witrant, Emmanuel Schwander, Jakob Etheridge, D. Röckmann, T. Reconstruction of the carbon isotopic composition of methane over the last 50 yr based on firn air measurements at 11 polar sites |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Methane is a strong greenhouse gas and large uncertainties exist concerning the future evolution of its atmospheric abundance. Analyzing methane atmospheric mixing and stable isotope ratios in air trapped in polar ice sheets helps reconstructing the evolution of its sources and sinks in the past. This is important to improve predictions of atmospheric CH4 mixing ratios in the future under the influence of a changing climate. We present an attempt to reconcile methane carbon isotope records from 11 firn sites from both Greenland and Antarctica to reconstruct a consistent 13C(CH4) history over the last 50 yr. In the firn, the atmospheric signal is altered mainly by diffusion and grav itation. These processes are taken into account by firn transport models. We show that isotope reconstructions from individual sites are not always mutually consistent among the different sites. Therefore we apply for the first time a multisite isotope inversion to reconstruct an atmospheric isotope history that is constrained by all individual sites, generating a multisite “best-estimate” scenario. This scenario is compared to ice core data, atmospheric air archive results and direct atmospheric monitoring data. |
author2 |
Institute for Marine and Atmospheric Research Utrecht (IMAU) Utrecht University Utrecht CLIPS, CHANG Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-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 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)-Institut national des sciences de l'Univers (INSU - CNRS)-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 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) CLIPS Centre for Ice and Climate Copenhagen Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU)-Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU) School of Environmental Sciences Norwich University of East Anglia Norwich (UEA) GIPSA - Systèmes linéaires et robustesse (GIPSA-SLR) Département Automatique (GIPSA-DA) Grenoble Images Parole Signal Automatique (GIPSA-lab) Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab) Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern Bern -Universität Bern Bern Centre for Australian Weather and Climate Research CSIRO Marine and Atmospheric Research |
format |
Article in Journal/Newspaper |
author |
Sapart, C.J. Martinerie, Patricia Chappellaz, Jérôme Van De Wal, R.S.W. Sperlich, P. Van Der Veen, C. Bernard, Serge Sturges, W. T. Blunier, T. Witrant, Emmanuel Schwander, Jakob Etheridge, D. Röckmann, T. |
author_facet |
Sapart, C.J. Martinerie, Patricia Chappellaz, Jérôme Van De Wal, R.S.W. Sperlich, P. Van Der Veen, C. Bernard, Serge Sturges, W. T. Blunier, T. Witrant, Emmanuel Schwander, Jakob Etheridge, D. Röckmann, T. |
author_sort |
Sapart, C.J. |
title |
Reconstruction of the carbon isotopic composition of methane over the last 50 yr based on firn air measurements at 11 polar sites |
title_short |
Reconstruction of the carbon isotopic composition of methane over the last 50 yr based on firn air measurements at 11 polar sites |
title_full |
Reconstruction of the carbon isotopic composition of methane over the last 50 yr based on firn air measurements at 11 polar sites |
title_fullStr |
Reconstruction of the carbon isotopic composition of methane over the last 50 yr based on firn air measurements at 11 polar sites |
title_full_unstemmed |
Reconstruction of the carbon isotopic composition of methane over the last 50 yr based on firn air measurements at 11 polar sites |
title_sort |
reconstruction of the carbon isotopic composition of methane over the last 50 yr based on firn air measurements at 11 polar sites |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.archives-ouvertes.fr/hal-00821201 https://doi.org/10.5194/acpd-12-9587-2012 |
long_lat |
ENVELOPE(12.125,12.125,67.516,67.516) |
geographic |
Greenland Grav |
geographic_facet |
Greenland Grav |
genre |
Antarc* Antarctica Greenland ice core |
genre_facet |
Antarc* Antarctica Greenland ice core |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.archives-ouvertes.fr/hal-00821201 Atmospheric Chemistry and Physics Discussions, European Geosciences Union, 2012, 12, pp.9587-9619. ⟨10.5194/acpd-12-9587-2012⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acpd-12-9587-2012 hal-00821201 https://hal.archives-ouvertes.fr/hal-00821201 doi:10.5194/acpd-12-9587-2012 |
op_doi |
https://doi.org/10.5194/acpd-12-9587-2012 |
_version_ |
1766262162260492288 |
spelling |
ftccsdartic:oai:HAL:hal-00821201v1 2023-05-15T13:55:30+02:00 Reconstruction of the carbon isotopic composition of methane over the last 50 yr based on firn air measurements at 11 polar sites Sapart, C.J. Martinerie, Patricia Chappellaz, Jérôme Van De Wal, R.S.W. Sperlich, P. Van Der Veen, C. Bernard, Serge Sturges, W. T. Blunier, T. Witrant, Emmanuel Schwander, Jakob Etheridge, D. Röckmann, T. Institute for Marine and Atmospheric Research Utrecht (IMAU) Utrecht University Utrecht CLIPS, CHANG Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-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 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)-Institut national des sciences de l'Univers (INSU - CNRS)-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 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) CLIPS Centre for Ice and Climate Copenhagen Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU)-Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU) School of Environmental Sciences Norwich University of East Anglia Norwich (UEA) GIPSA - Systèmes linéaires et robustesse (GIPSA-SLR) Département Automatique (GIPSA-DA) Grenoble Images Parole Signal Automatique (GIPSA-lab) Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab) Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern Bern -Universität Bern Bern Centre for Australian Weather and Climate Research CSIRO Marine and Atmospheric Research 2012 https://hal.archives-ouvertes.fr/hal-00821201 https://doi.org/10.5194/acpd-12-9587-2012 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acpd-12-9587-2012 hal-00821201 https://hal.archives-ouvertes.fr/hal-00821201 doi:10.5194/acpd-12-9587-2012 ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.archives-ouvertes.fr/hal-00821201 Atmospheric Chemistry and Physics Discussions, European Geosciences Union, 2012, 12, pp.9587-9619. ⟨10.5194/acpd-12-9587-2012⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2012 ftccsdartic https://doi.org/10.5194/acpd-12-9587-2012 2021-11-14T00:50:58Z International audience Methane is a strong greenhouse gas and large uncertainties exist concerning the future evolution of its atmospheric abundance. Analyzing methane atmospheric mixing and stable isotope ratios in air trapped in polar ice sheets helps reconstructing the evolution of its sources and sinks in the past. This is important to improve predictions of atmospheric CH4 mixing ratios in the future under the influence of a changing climate. We present an attempt to reconcile methane carbon isotope records from 11 firn sites from both Greenland and Antarctica to reconstruct a consistent 13C(CH4) history over the last 50 yr. In the firn, the atmospheric signal is altered mainly by diffusion and grav itation. These processes are taken into account by firn transport models. We show that isotope reconstructions from individual sites are not always mutually consistent among the different sites. Therefore we apply for the first time a multisite isotope inversion to reconstruct an atmospheric isotope history that is constrained by all individual sites, generating a multisite “best-estimate” scenario. This scenario is compared to ice core data, atmospheric air archive results and direct atmospheric monitoring data. Article in Journal/Newspaper Antarc* Antarctica Greenland ice core Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Greenland Grav ENVELOPE(12.125,12.125,67.516,67.516) |