1-D-ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica
One-dimensional (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 within each core. We reconstruct past accu...
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Copernicus Publications
2007
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fttriple:oai:gotriple.eu:oai:doaj.org/article:3704d60bd6ce4cff967d0063e21487bf 2023-05-15T13:55:12+02:00 1-D-ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica F. Parrenin G. Dreyfus G. Durand S. Fujita O. Gagliardini F. Gillet J. Jouzel K. Kawamura N. Lhomme V. Masson-Delmotte C. Ritz J. Schwander H. Shoji R. Uemura O. Watanabe N. Yoshida 2007-06-01 http://www.clim-past.net/3/243/2007/cp-3-243-2007.pdf https://doaj.org/article/3704d60bd6ce4cff967d0063e21487bf en eng Copernicus Publications 1814-9324 1814-9332 http://www.clim-past.net/3/243/2007/cp-3-243-2007.pdf https://doaj.org/article/3704d60bd6ce4cff967d0063e21487bf undefined Climate of the Past, Vol 3, Iss 2, Pp 243-259 (2007) geo archeo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2007 fttriple 2023-01-22T17:32:56Z One-dimensional (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 within 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 ice thickness with time. Article in Journal/Newspaper Antarc* Antarctica East Antarctica EPICA Unknown Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) East Antarctica |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo archeo |
spellingShingle |
geo archeo F. Parrenin G. Dreyfus G. Durand S. Fujita O. Gagliardini F. Gillet J. Jouzel K. Kawamura N. Lhomme V. Masson-Delmotte C. Ritz J. Schwander H. Shoji R. Uemura O. Watanabe N. Yoshida 1-D-ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica |
topic_facet |
geo archeo |
description |
One-dimensional (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 within 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 ice thickness with time. |
format |
Article in Journal/Newspaper |
author |
F. Parrenin G. Dreyfus G. Durand S. Fujita O. Gagliardini F. Gillet J. Jouzel K. Kawamura N. Lhomme V. Masson-Delmotte C. Ritz J. Schwander H. Shoji R. Uemura O. Watanabe N. Yoshida |
author_facet |
F. Parrenin G. Dreyfus G. Durand S. Fujita O. Gagliardini F. Gillet J. Jouzel K. Kawamura N. Lhomme V. Masson-Delmotte C. Ritz J. Schwander H. Shoji R. Uemura O. Watanabe N. Yoshida |
author_sort |
F. Parrenin |
title |
1-D-ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica |
title_short |
1-D-ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica |
title_full |
1-D-ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica |
title_fullStr |
1-D-ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica |
title_full_unstemmed |
1-D-ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica |
title_sort |
1-d-ice flow modelling at epica dome c and dome fuji, east antarctica |
publisher |
Copernicus Publications |
publishDate |
2007 |
url |
http://www.clim-past.net/3/243/2007/cp-3-243-2007.pdf https://doaj.org/article/3704d60bd6ce4cff967d0063e21487bf |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) |
geographic |
Dome Fuji East Antarctica |
geographic_facet |
Dome Fuji East Antarctica |
genre |
Antarc* Antarctica East Antarctica EPICA |
genre_facet |
Antarc* Antarctica East Antarctica EPICA |
op_source |
Climate of the Past, Vol 3, Iss 2, Pp 243-259 (2007) |
op_relation |
1814-9324 1814-9332 http://www.clim-past.net/3/243/2007/cp-3-243-2007.pdf https://doaj.org/article/3704d60bd6ce4cff967d0063e21487bf |
op_rights |
undefined |
_version_ |
1766261494518906880 |