Glacial-interglacial dynamics of Antarctic firn columns: comparison between simulations and ice core air- δ 15N measurements
International audience Correct estimation of the firn lock-in depth is essential for correctly linking gas and ice chronologies in ice core studies. Here, two approaches to constrain the firn depth evolution in Antarctica are presented over the last deglaciation : outputs of a firn densification mod...
Published in: | Climate of the Past |
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Main Authors: | , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2013
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Subjects: | |
Online Access: | https://hal.science/hal-00861133 https://hal.science/hal-00861133/document https://hal.science/hal-00861133/file/cp-9-983-2013.pdf https://doi.org/10.5194/cp-9-983-2013 |
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ftnormandieuniv:oai:HAL:hal-00861133v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Normandie Université: HAL |
op_collection_id |
ftnormandieuniv |
language |
English |
topic |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes [SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes [SDU]Sciences of the Universe [physics] Capron, E. Landais, A. Buiron, D. Cauquoin, A. Chappellaz, J. Debret, Maxime Jouzel, Jean Leuenberger, M. Martinerie, P. Masson-Delmotte, Valérie Mulvaney, R. Parrenin, F. Prie, F. Glacial-interglacial dynamics of Antarctic firn columns: comparison between simulations and ice core air- δ 15N measurements |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes [SDU]Sciences of the Universe [physics] |
description |
International audience Correct estimation of the firn lock-in depth is essential for correctly linking gas and ice chronologies in ice core studies. Here, two approaches to constrain the firn depth evolution in Antarctica are presented over the last deglaciation : outputs of a firn densification model, and measurements of 15N of N2 in air trapped in ice core, assuming that 15N is only affected by gravitational fractionation in the firn column. Since the firn densification process is largely governed by surface temperature and accumulation rate, we have investigated four ice cores drilled in coastal (Berkner Island, BI, and James Ross Island, JRI) and semi-coastal (TALDICE and EPICA Dronning Maud Land, EDML) Antarctic regions. Combined with available ice core air- 15N measurements from the EPICA Dome C (EDC) site, the studied regions encompass a large range of surface accumulation rates and temperature conditions. Our 15N profiles reveal a heterogeneous response of the firn structure to glacial-interglacial climatic changes. While firn densification simulations correctly predict TALDICE 15N variations, they systematically fail to capture the large millennial-scale 15N variations measured at BI and the 15N glacial levels measured at JRI and EDML - a mismatch previously reported for central East Antarctic ice cores. New constraints of the EDML gas-ice depth offset during the Laschamp event ( 41 ka) and the last deglaciation do not favour the hypothesis of a large convective zone within the firn as the explanation of the glacial firn model- 15N data mismatch for this site. While we could not conduct an indepth study of the influence of impurities in snow for firnification from the existing datasets, our detailed comparison between the 15N profiles and firn model simulations under different temperature and accumulation rate scenarios suggests that the role of accumulation rate may have been underestimated in the current description of firnification models. |
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) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) 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)) 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) Morphodynamique Continentale et Côtière (M2C) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern / University of Bern (UNIBE)-Universität Bern / University of Bern (UNIBE) Laboratoire Chrono-environnement (UMR 6249) (LCE) Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) |
format |
Article in Journal/Newspaper |
author |
Capron, E. Landais, A. Buiron, D. Cauquoin, A. Chappellaz, J. Debret, Maxime Jouzel, Jean Leuenberger, M. Martinerie, P. Masson-Delmotte, Valérie Mulvaney, R. Parrenin, F. Prie, F. |
author_facet |
Capron, E. Landais, A. Buiron, D. Cauquoin, A. Chappellaz, J. Debret, Maxime Jouzel, Jean Leuenberger, M. Martinerie, P. Masson-Delmotte, Valérie Mulvaney, R. Parrenin, F. Prie, F. |
author_sort |
Capron, E. |
title |
Glacial-interglacial dynamics of Antarctic firn columns: comparison between simulations and ice core air- δ 15N measurements |
title_short |
Glacial-interglacial dynamics of Antarctic firn columns: comparison between simulations and ice core air- δ 15N measurements |
title_full |
Glacial-interglacial dynamics of Antarctic firn columns: comparison between simulations and ice core air- δ 15N measurements |
title_fullStr |
Glacial-interglacial dynamics of Antarctic firn columns: comparison between simulations and ice core air- δ 15N measurements |
title_full_unstemmed |
Glacial-interglacial dynamics of Antarctic firn columns: comparison between simulations and ice core air- δ 15N measurements |
title_sort |
glacial-interglacial dynamics of antarctic firn columns: comparison between simulations and ice core air- δ 15n measurements |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-00861133 https://hal.science/hal-00861133/document https://hal.science/hal-00861133/file/cp-9-983-2013.pdf https://doi.org/10.5194/cp-9-983-2013 |
long_lat |
ENVELOPE(-48.117,-48.117,-79.333,-79.333) |
geographic |
Antarctic Berkner Island Dronning Maud Land Ross Island |
geographic_facet |
Antarctic Berkner Island Dronning Maud Land Ross Island |
genre |
Antarc* Antarctic Antarctica Berkner Island Dronning Maud Land EPICA ice core James Ross Island Ross Island |
genre_facet |
Antarc* Antarctic Antarctica Berkner Island Dronning Maud Land EPICA ice core James Ross Island Ross Island |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-00861133 Climate of the Past, 2013, 9, pp.983-999. ⟨10.5194/cp-9-983-2013⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-9-983-2013 hal-00861133 https://hal.science/hal-00861133 https://hal.science/hal-00861133/document https://hal.science/hal-00861133/file/cp-9-983-2013.pdf doi:10.5194/cp-9-983-2013 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-9-983-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
3 |
container_start_page |
983 |
op_container_end_page |
999 |
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1801383604344848384 |
spelling |
ftnormandieuniv:oai:HAL:hal-00861133v1 2024-06-09T07:40:07+00:00 Glacial-interglacial dynamics of Antarctic firn columns: comparison between simulations and ice core air- δ 15N measurements Capron, E. Landais, A. Buiron, D. Cauquoin, A. Chappellaz, J. Debret, Maxime Jouzel, Jean Leuenberger, M. Martinerie, P. Masson-Delmotte, Valérie Mulvaney, R. Parrenin, F. Prie, F. 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) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) 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)) 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) Morphodynamique Continentale et Côtière (M2C) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern / University of Bern (UNIBE)-Universität Bern / University of Bern (UNIBE) Laboratoire Chrono-environnement (UMR 6249) (LCE) Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) 2013 https://hal.science/hal-00861133 https://hal.science/hal-00861133/document https://hal.science/hal-00861133/file/cp-9-983-2013.pdf https://doi.org/10.5194/cp-9-983-2013 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-9-983-2013 hal-00861133 https://hal.science/hal-00861133 https://hal.science/hal-00861133/document https://hal.science/hal-00861133/file/cp-9-983-2013.pdf doi:10.5194/cp-9-983-2013 info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-00861133 Climate of the Past, 2013, 9, pp.983-999. ⟨10.5194/cp-9-983-2013⟩ [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2013 ftnormandieuniv https://doi.org/10.5194/cp-9-983-2013 2024-05-16T10:14:25Z International audience Correct estimation of the firn lock-in depth is essential for correctly linking gas and ice chronologies in ice core studies. Here, two approaches to constrain the firn depth evolution in Antarctica are presented over the last deglaciation : outputs of a firn densification model, and measurements of 15N of N2 in air trapped in ice core, assuming that 15N is only affected by gravitational fractionation in the firn column. Since the firn densification process is largely governed by surface temperature and accumulation rate, we have investigated four ice cores drilled in coastal (Berkner Island, BI, and James Ross Island, JRI) and semi-coastal (TALDICE and EPICA Dronning Maud Land, EDML) Antarctic regions. Combined with available ice core air- 15N measurements from the EPICA Dome C (EDC) site, the studied regions encompass a large range of surface accumulation rates and temperature conditions. Our 15N profiles reveal a heterogeneous response of the firn structure to glacial-interglacial climatic changes. While firn densification simulations correctly predict TALDICE 15N variations, they systematically fail to capture the large millennial-scale 15N variations measured at BI and the 15N glacial levels measured at JRI and EDML - a mismatch previously reported for central East Antarctic ice cores. New constraints of the EDML gas-ice depth offset during the Laschamp event ( 41 ka) and the last deglaciation do not favour the hypothesis of a large convective zone within the firn as the explanation of the glacial firn model- 15N data mismatch for this site. While we could not conduct an indepth study of the influence of impurities in snow for firnification from the existing datasets, our detailed comparison between the 15N profiles and firn model simulations under different temperature and accumulation rate scenarios suggests that the role of accumulation rate may have been underestimated in the current description of firnification models. Article in Journal/Newspaper Antarc* Antarctic Antarctica Berkner Island Dronning Maud Land EPICA ice core James Ross Island Ross Island Normandie Université: HAL Antarctic Berkner Island ENVELOPE(-48.117,-48.117,-79.333,-79.333) Dronning Maud Land Ross Island Climate of the Past 9 3 983 999 |