High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core
International audience The Greenland NEEM (North Greenland Eemian Ice Drilling) operation in 2010 provided the first opportunity to combine trace-gas measurements by laser spectroscopic instruments and continuous-flow analysis along a freshly drilled ice core in a field-based setting. We present the...
Published in: | Climate of the Past |
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Main Authors: | , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2013
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Online Access: | https://hal.science/hal-00996077 https://hal.science/hal-00996077/document https://hal.science/hal-00996077/file/cp-9-2579-2013.pdf https://doi.org/10.5194/CP-9-2579-2013 |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] |
spellingShingle |
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] Chappellaz, J. Stowasser, C. Blunier, T. Baslev-Clausen, D. Brook, E. J. Dallmayr, R. Faïn, X. Lee, J. E. Mitchell, L. E. Pascual, O. Romanini, D. Rosen, Jean Schüpbach, S. High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core |
topic_facet |
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] |
description |
International audience The Greenland NEEM (North Greenland Eemian Ice Drilling) operation in 2010 provided the first opportunity to combine trace-gas measurements by laser spectroscopic instruments and continuous-flow analysis along a freshly drilled ice core in a field-based setting. We present the resulting atmospheric methane (CH4) record covering the time period from 107.7 to 9.5 ka b2k (thousand years before 2000 AD). Companion discrete CH4 measurements are required to transfer the laser spectroscopic data from a relative to an absolute scale. However, even on a relative scale, the high-resolution CH4 data set significantly improves our knowledge of past atmospheric methane concentration changes. New significant sub-millennial-scale features appear during interstadials and stadials, generally associated with similar changes in water isotopic ratios of the ice, a proxy for local temperature. In addition to the midpoint of Dansgaard-Oeschger (D/O) CH4 transitions usually used for cross-dating, sharp definition of the start and end of these events brings precise depth markers (with ±20 cm uncertainty) for further cross-dating with other palaeo- or ice core records, e.g. speleothems. The method also provides an estimate of CH4 rates of change. The onsets of D/O events in the methane signal show a more rapid rate of change than their endings. The rate of CH4 increase associated with the onsets of D/O events progressively declines from 1.7 to 0.6 ppbv yr-1 in the course of marine isotope stage 3. The largest observed rate of increase takes place at the onset of D/O event #21 and reaches 2.5 ppbv yr-1. |
author2 |
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) Centre for Ice and Climate Copenhagen Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH)-Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) Laboratoire Interdisciplinaire de Physique Saint Martin d’Hères (LIPhy) Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS) Archéologies, Cultures et Sociétés (ACS) Ministère de la Culture et de la Communication (MCC)-Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern Bern (UNIBE)-Universität Bern Bern (UNIBE) |
format |
Article in Journal/Newspaper |
author |
Chappellaz, J. Stowasser, C. Blunier, T. Baslev-Clausen, D. Brook, E. J. Dallmayr, R. Faïn, X. Lee, J. E. Mitchell, L. E. Pascual, O. Romanini, D. Rosen, Jean Schüpbach, S. |
author_facet |
Chappellaz, J. Stowasser, C. Blunier, T. Baslev-Clausen, D. Brook, E. J. Dallmayr, R. Faïn, X. Lee, J. E. Mitchell, L. E. Pascual, O. Romanini, D. Rosen, Jean Schüpbach, S. |
author_sort |
Chappellaz, J. |
title |
High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core |
title_short |
High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core |
title_full |
High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core |
title_fullStr |
High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core |
title_full_unstemmed |
High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core |
title_sort |
high-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the neem ice core |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-00996077 https://hal.science/hal-00996077/document https://hal.science/hal-00996077/file/cp-9-2579-2013.pdf https://doi.org/10.5194/CP-9-2579-2013 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core North Greenland |
genre_facet |
Greenland ice core North Greenland |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-00996077 Climate of the Past, 2013, 9, pp.2579-2593. ⟨10.5194/CP-9-2579-2013⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/CP-9-2579-2013 hal-00996077 https://hal.science/hal-00996077 https://hal.science/hal-00996077/document https://hal.science/hal-00996077/file/cp-9-2579-2013.pdf BIBCODE: 2013CliPa.9.2579C doi:10.5194/CP-9-2579-2013 |
op_rights |
http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.5194/CP-9-2579-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
6 |
container_start_page |
2579 |
op_container_end_page |
2593 |
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1766018107582709760 |
spelling |
ftunivnantes:oai:HAL:hal-00996077v1 2023-05-15T16:28:27+02:00 High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core Chappellaz, J. Stowasser, C. Blunier, T. Baslev-Clausen, D. Brook, E. J. Dallmayr, R. Faïn, X. Lee, J. E. Mitchell, L. E. Pascual, O. Romanini, D. Rosen, Jean Schüpbach, S. 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) Centre for Ice and Climate Copenhagen Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH)-Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) Laboratoire Interdisciplinaire de Physique Saint Martin d’Hères (LIPhy) Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS) Archéologies, Cultures et Sociétés (ACS) Ministère de la Culture et de la Communication (MCC)-Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern Bern (UNIBE)-Universität Bern Bern (UNIBE) 2013-11 https://hal.science/hal-00996077 https://hal.science/hal-00996077/document https://hal.science/hal-00996077/file/cp-9-2579-2013.pdf https://doi.org/10.5194/CP-9-2579-2013 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/CP-9-2579-2013 hal-00996077 https://hal.science/hal-00996077 https://hal.science/hal-00996077/document https://hal.science/hal-00996077/file/cp-9-2579-2013.pdf BIBCODE: 2013CliPa.9.2579C doi:10.5194/CP-9-2579-2013 http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess CC-BY-NC ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-00996077 Climate of the Past, 2013, 9, pp.2579-2593. ⟨10.5194/CP-9-2579-2013⟩ [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] info:eu-repo/semantics/article Journal articles 2013 ftunivnantes https://doi.org/10.5194/CP-9-2579-2013 2023-03-01T03:06:03Z International audience The Greenland NEEM (North Greenland Eemian Ice Drilling) operation in 2010 provided the first opportunity to combine trace-gas measurements by laser spectroscopic instruments and continuous-flow analysis along a freshly drilled ice core in a field-based setting. We present the resulting atmospheric methane (CH4) record covering the time period from 107.7 to 9.5 ka b2k (thousand years before 2000 AD). Companion discrete CH4 measurements are required to transfer the laser spectroscopic data from a relative to an absolute scale. However, even on a relative scale, the high-resolution CH4 data set significantly improves our knowledge of past atmospheric methane concentration changes. New significant sub-millennial-scale features appear during interstadials and stadials, generally associated with similar changes in water isotopic ratios of the ice, a proxy for local temperature. In addition to the midpoint of Dansgaard-Oeschger (D/O) CH4 transitions usually used for cross-dating, sharp definition of the start and end of these events brings precise depth markers (with ±20 cm uncertainty) for further cross-dating with other palaeo- or ice core records, e.g. speleothems. The method also provides an estimate of CH4 rates of change. The onsets of D/O events in the methane signal show a more rapid rate of change than their endings. The rate of CH4 increase associated with the onsets of D/O events progressively declines from 1.7 to 0.6 ppbv yr-1 in the course of marine isotope stage 3. The largest observed rate of increase takes place at the onset of D/O event #21 and reaches 2.5 ppbv yr-1. Article in Journal/Newspaper Greenland ice core North Greenland Université de Nantes: HAL-UNIV-NANTES Greenland Climate of the Past 9 6 2579 2593 |