Historical behaviour of Dome C and Talos Dome (East Antarctica) as investigated by snow accumulation and ice velocity measurements
International audience Ice divide–dome behaviour is used for ice sheet mass balance studies and interpretation of ice core records. In order to characterize the historical behaviour (last 400 yr) of Dome C and Talos Dome (East Antarctica), ice velocities have been measured since 1996 using a GPS sys...
Published in: | Global and Planetary Change |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2008
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Subjects: | |
Online Access: | https://insu.hal.science/insu-00381096 https://doi.org/10.1016/j.gloplacha.2007.08.002 |
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ftunivsavoie:oai:HAL:insu-00381096v1 |
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openpolar |
institution |
Open Polar |
collection |
Université Savoie Mont Blanc: HAL |
op_collection_id |
ftunivsavoie |
language |
English |
topic |
geophysical survey ice divide snow accumulation Talos Dome Dome C East Antarctica [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
geophysical survey ice divide snow accumulation Talos Dome Dome C East Antarctica [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Urbini, Stefano Frezzotti, Massimo Gandolfi, Stefano Vincent, Christian Scarchilli, Claudio Vittuari, Luca Fily, Michel Historical behaviour of Dome C and Talos Dome (East Antarctica) as investigated by snow accumulation and ice velocity measurements |
topic_facet |
geophysical survey ice divide snow accumulation Talos Dome Dome C East Antarctica [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Ice divide–dome behaviour is used for ice sheet mass balance studies and interpretation of ice core records. In order to characterize the historical behaviour (last 400 yr) of Dome C and Talos Dome (East Antarctica), ice velocities have been measured since 1996 using a GPS system, and the palaeo-spatial variability of snow accumulation has been surveyed using snow radar and firn cores. The snow accumulation distribution of both domes indicates distributions of accumulation that are non-symmetrical in relation to dome morphology. Changes in spatial distributions have been observed over the last few centuries, with a decrease in snow accumulation gradient along the wind direction at Talos Dome and a counter-clockwise rotation of accumulation distribution in the northern part of Dome C. Observations at Dome C reveal a significant increase in accumulation since the 1950s, which could correlate to altered snow accumulation patterns due to changes in snowfall trajectory. Snow accumulation mechanisms are different at the two domes: a wind-driven snow accumulation process operates at Talos Dome, whereas snowfall trajectory direction is the main factor at Dome C. Repeated GPS measurements made at Talos Dome have highlighted changes in ice velocity, with a deceleration in the NE portion, acceleration in the SW portion and migration of dome summit, which are apparently correlated with changes in accumulation distribution. The observed behaviour in accumulation and velocity indicates that even the most remote areas of East Antarctica have changed from a decadal to secular scale. |
author2 |
Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Roma (INGV) Istituto Nazionale di Geofisica e Vulcanologia Ente per le Nuove Tecnologie, l'Energia e l'Ambiente (ENEA) Centro Ricerche Casaccia Dipartimento di Ingegneria delle Strutture, dei Trasporti, delle Acque, del Rilevamento, del Territorio (DISTART) Alma Mater Studiorum Università di Bologna = University of Bologna (UNIBO) 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) European Project for Ice Coring in Antartica (EPICA) |
format |
Article in Journal/Newspaper |
author |
Urbini, Stefano Frezzotti, Massimo Gandolfi, Stefano Vincent, Christian Scarchilli, Claudio Vittuari, Luca Fily, Michel |
author_facet |
Urbini, Stefano Frezzotti, Massimo Gandolfi, Stefano Vincent, Christian Scarchilli, Claudio Vittuari, Luca Fily, Michel |
author_sort |
Urbini, Stefano |
title |
Historical behaviour of Dome C and Talos Dome (East Antarctica) as investigated by snow accumulation and ice velocity measurements |
title_short |
Historical behaviour of Dome C and Talos Dome (East Antarctica) as investigated by snow accumulation and ice velocity measurements |
title_full |
Historical behaviour of Dome C and Talos Dome (East Antarctica) as investigated by snow accumulation and ice velocity measurements |
title_fullStr |
Historical behaviour of Dome C and Talos Dome (East Antarctica) as investigated by snow accumulation and ice velocity measurements |
title_full_unstemmed |
Historical behaviour of Dome C and Talos Dome (East Antarctica) as investigated by snow accumulation and ice velocity measurements |
title_sort |
historical behaviour of dome c and talos dome (east antarctica) as investigated by snow accumulation and ice velocity measurements |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://insu.hal.science/insu-00381096 https://doi.org/10.1016/j.gloplacha.2007.08.002 |
genre |
Antarc* Antarctica East Antarctica ice core Ice Sheet |
genre_facet |
Antarc* Antarctica East Antarctica ice core Ice Sheet |
op_source |
ISSN: 0921-8181 Global and Planetary Change https://insu.hal.science/insu-00381096 Global and Planetary Change, 2008, 60 (3-4), pp.576 à 588. ⟨10.1016/j.gloplacha.2007.08.002⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gloplacha.2007.08.002 insu-00381096 https://insu.hal.science/insu-00381096 doi:10.1016/j.gloplacha.2007.08.002 |
op_doi |
https://doi.org/10.1016/j.gloplacha.2007.08.002 |
container_title |
Global and Planetary Change |
container_volume |
60 |
container_issue |
3-4 |
container_start_page |
576 |
op_container_end_page |
588 |
_version_ |
1797573356527026176 |
spelling |
ftunivsavoie:oai:HAL:insu-00381096v1 2024-04-28T08:01:45+00:00 Historical behaviour of Dome C and Talos Dome (East Antarctica) as investigated by snow accumulation and ice velocity measurements Urbini, Stefano Frezzotti, Massimo Gandolfi, Stefano Vincent, Christian Scarchilli, Claudio Vittuari, Luca Fily, Michel Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Roma (INGV) Istituto Nazionale di Geofisica e Vulcanologia Ente per le Nuove Tecnologie, l'Energia e l'Ambiente (ENEA) Centro Ricerche Casaccia Dipartimento di Ingegneria delle Strutture, dei Trasporti, delle Acque, del Rilevamento, del Territorio (DISTART) Alma Mater Studiorum Università di Bologna = University of Bologna (UNIBO) 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) European Project for Ice Coring in Antartica (EPICA) 2008 https://insu.hal.science/insu-00381096 https://doi.org/10.1016/j.gloplacha.2007.08.002 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gloplacha.2007.08.002 insu-00381096 https://insu.hal.science/insu-00381096 doi:10.1016/j.gloplacha.2007.08.002 ISSN: 0921-8181 Global and Planetary Change https://insu.hal.science/insu-00381096 Global and Planetary Change, 2008, 60 (3-4), pp.576 à 588. ⟨10.1016/j.gloplacha.2007.08.002⟩ geophysical survey ice divide snow accumulation Talos Dome Dome C East Antarctica [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2008 ftunivsavoie https://doi.org/10.1016/j.gloplacha.2007.08.002 2024-04-11T00:32:27Z International audience Ice divide–dome behaviour is used for ice sheet mass balance studies and interpretation of ice core records. In order to characterize the historical behaviour (last 400 yr) of Dome C and Talos Dome (East Antarctica), ice velocities have been measured since 1996 using a GPS system, and the palaeo-spatial variability of snow accumulation has been surveyed using snow radar and firn cores. The snow accumulation distribution of both domes indicates distributions of accumulation that are non-symmetrical in relation to dome morphology. Changes in spatial distributions have been observed over the last few centuries, with a decrease in snow accumulation gradient along the wind direction at Talos Dome and a counter-clockwise rotation of accumulation distribution in the northern part of Dome C. Observations at Dome C reveal a significant increase in accumulation since the 1950s, which could correlate to altered snow accumulation patterns due to changes in snowfall trajectory. Snow accumulation mechanisms are different at the two domes: a wind-driven snow accumulation process operates at Talos Dome, whereas snowfall trajectory direction is the main factor at Dome C. Repeated GPS measurements made at Talos Dome have highlighted changes in ice velocity, with a deceleration in the NE portion, acceleration in the SW portion and migration of dome summit, which are apparently correlated with changes in accumulation distribution. The observed behaviour in accumulation and velocity indicates that even the most remote areas of East Antarctica have changed from a decadal to secular scale. Article in Journal/Newspaper Antarc* Antarctica East Antarctica ice core Ice Sheet Université Savoie Mont Blanc: HAL Global and Planetary Change 60 3-4 576 588 |