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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fttriple:oai:gotriple.eu:10670/1.x895qe 2023-05-15T13:35:56+02:00 1-D-ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica Parrenin, F. Dreyfus, G. Durand, G. Fujita, S. Gagliardini, O. Gillet, F. Jouzel, J. Kawamura, K. Lhomme, N. Masson-Delmotte, V. Ritz, C. Schwander, J. Shoji, H. Uemura, R. Watanabe, O. Yoshida, N. 2018-09-27 https://doi.org/10.5194/cp-3-243-2007 https://cp.copernicus.org/articles/3/243/2007/ en eng doi:10.5194/cp-3-243-2007 10670/1.x895qe https://cp.copernicus.org/articles/3/243/2007/ undefined Geographica Helvetica - geography eISSN: 1814-9332 geo archeo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2018 fttriple https://doi.org/10.5194/cp-3-243-2007 2023-01-22T18:40:38Z 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. Text Antarc* Antarctica East Antarctica EPICA Unknown Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) East Antarctica Climate of the Past 3 2 243 259 |
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language |
English |
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geo archeo |
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geo archeo Parrenin, F. Dreyfus, G. Durand, G. Fujita, S. Gagliardini, O. Gillet, F. Jouzel, J. Kawamura, K. Lhomme, N. Masson-Delmotte, V. Ritz, C. Schwander, J. Shoji, H. Uemura, R. Watanabe, O. Yoshida, N. 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 |
Text |
author |
Parrenin, F. Dreyfus, G. Durand, G. Fujita, S. Gagliardini, O. Gillet, F. Jouzel, J. Kawamura, K. Lhomme, N. Masson-Delmotte, V. Ritz, C. Schwander, J. Shoji, H. Uemura, R. Watanabe, O. Yoshida, N. |
author_facet |
Parrenin, F. Dreyfus, G. Durand, G. Fujita, S. Gagliardini, O. Gillet, F. Jouzel, J. Kawamura, K. Lhomme, N. Masson-Delmotte, V. Ritz, C. Schwander, J. Shoji, H. Uemura, R. Watanabe, O. Yoshida, N. |
author_sort |
Parrenin, F. |
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 |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-3-243-2007 https://cp.copernicus.org/articles/3/243/2007/ |
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 |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-3-243-2007 10670/1.x895qe https://cp.copernicus.org/articles/3/243/2007/ |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-3-243-2007 |
container_title |
Climate of the Past |
container_volume |
3 |
container_issue |
2 |
container_start_page |
243 |
op_container_end_page |
259 |
_version_ |
1766072243678347264 |