Ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica
International audience 1-D ice flow models are used to construct the age scales at the Dome C and Dome Fuji drilling sites (East Antarctica). The poorly constrained glaciological parameters at each site are recovered by fitting independent age markers identified on each core. We reconstruct past acc...
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ftuniversailles:oai:HAL:hal-00330720v1 2024-04-28T08:03:02+00:00 Ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica Parrenin, F. Dreyfus, G. Durand, Geoffroy Fujita, S. Gagliardini, O. Gillet, F. Jouzel, Jean Kawamura, K. Lhomme, N. Masson-Delmotte, Valérie Ritz, C. Schwander, J. Shoji, H. Uemura, R. Watanabe, O. Yoshida, N. 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) 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) Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) National Institute of Polar Research Tokyo (NiPR) Center for Atmospheric and Oceanic Studies Sendai Tohoku University Sendai Physics Institute New Energy Resources Research Center Frontier Collaborative Research Center (FCRC) Tokyo Institute of Technology Tokyo (TITECH) 2008-06-18 https://hal.science/hal-00330720 https://hal.science/hal-00330720/document https://hal.science/hal-00330720/file/cpd-3-19-2007.pdf en eng HAL CCSD hal-00330720 https://hal.science/hal-00330720 https://hal.science/hal-00330720/document https://hal.science/hal-00330720/file/cpd-3-19-2007.pdf info:eu-repo/semantics/OpenAccess https://hal.science/hal-00330720 2008 [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/preprint Preprints, Working Papers, . 2008 ftuniversailles 2024-04-11T00:03:41Z International audience 1-D ice flow models are used to construct the age scales at the Dome C and Dome Fuji drilling sites (East Antarctica). The poorly constrained glaciological parameters at each site are recovered by fitting independent age markers identified on each core. We reconstruct past accumulation rates, that are larger than those modelled using the classical vapour saturation pressure relationship during glacial periods by up to a factor 1.5. During the Early Holocene, changes in reconstructed accumulation are not linearly related to changes in ice isotopic composition. A simple model of past elevation changes is developed and shows an amplitude variation of 110–120 m at both sites. We suggest that there is basal melting at Dome C (0.56±0.19 mm/yr). The reconstructed velocity profile is highly non linear at both sites, which suggests complex ice flow effects. This induces a non linear thinning function in both drilling sites, which is also characterized by bumps corresponding to variations in surface elevation with time. Report Antarc* Antarctica East Antarctica EPICA Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
institution |
Open Polar |
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Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Parrenin, F. Dreyfus, G. Durand, Geoffroy Fujita, S. Gagliardini, O. Gillet, F. Jouzel, Jean Kawamura, K. Lhomme, N. Masson-Delmotte, Valérie Ritz, C. Schwander, J. Shoji, H. Uemura, R. Watanabe, O. Yoshida, N. Ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 1-D ice flow models are used to construct the age scales at the Dome C and Dome Fuji drilling sites (East Antarctica). The poorly constrained glaciological parameters at each site are recovered by fitting independent age markers identified on each core. We reconstruct past accumulation rates, that are larger than those modelled using the classical vapour saturation pressure relationship during glacial periods by up to a factor 1.5. During the Early Holocene, changes in reconstructed accumulation are not linearly related to changes in ice isotopic composition. A simple model of past elevation changes is developed and shows an amplitude variation of 110–120 m at both sites. We suggest that there is basal melting at Dome C (0.56±0.19 mm/yr). The reconstructed velocity profile is highly non linear at both sites, which suggests complex ice flow effects. This induces a non linear thinning function in both drilling sites, which is also characterized by bumps corresponding to variations in surface elevation with time. |
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) 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) Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) National Institute of Polar Research Tokyo (NiPR) Center for Atmospheric and Oceanic Studies Sendai Tohoku University Sendai Physics Institute New Energy Resources Research Center Frontier Collaborative Research Center (FCRC) Tokyo Institute of Technology Tokyo (TITECH) |
format |
Report |
author |
Parrenin, F. Dreyfus, G. Durand, Geoffroy Fujita, S. Gagliardini, O. Gillet, F. Jouzel, Jean Kawamura, K. Lhomme, N. Masson-Delmotte, Valérie Ritz, C. Schwander, J. Shoji, H. Uemura, R. Watanabe, O. Yoshida, N. |
author_facet |
Parrenin, F. Dreyfus, G. Durand, Geoffroy Fujita, S. Gagliardini, O. Gillet, F. Jouzel, Jean Kawamura, K. Lhomme, N. Masson-Delmotte, Valérie Ritz, C. Schwander, J. Shoji, H. Uemura, R. Watanabe, O. Yoshida, N. |
author_sort |
Parrenin, F. |
title |
Ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica |
title_short |
Ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica |
title_full |
Ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica |
title_fullStr |
Ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica |
title_full_unstemmed |
Ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica |
title_sort |
ice flow modelling at epica dome c and dome fuji, east antarctica |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/hal-00330720 https://hal.science/hal-00330720/document https://hal.science/hal-00330720/file/cpd-3-19-2007.pdf |
genre |
Antarc* Antarctica East Antarctica EPICA |
genre_facet |
Antarc* Antarctica East Antarctica EPICA |
op_source |
https://hal.science/hal-00330720 2008 |
op_relation |
hal-00330720 https://hal.science/hal-00330720 https://hal.science/hal-00330720/document https://hal.science/hal-00330720/file/cpd-3-19-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1797574239798165504 |