Historical behaviour of Dome C and Talos Dome (East Antarctica) as investigated by snow accumulation and ice velocity measurements
Abstract 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 p...
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Online Access: | http://hdl.handle.net/11585/50526 https://doi.org/10.1016/j.gloplacha.2007.08.002 |
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ftunibolognairis:oai:cris.unibo.it:11585/50526 2024-04-14T08:02:54+00:00 Historical behaviour of Dome C and Talos Dome (East Antarctica) as investigated by snow accumulation and ice velocity measurements Stefano Urbini Massimo Frezzotti Christian Vincent Claudio Scarchilli Michel Fily GANDOLFI, STEFANO VITTUARI, LUCA Stefano Urbini Massimo Frezzotti Stefano Gandolfi Christian Vincent Claudio Scarchilli Luca Vittuari Michel Fily 2008 STAMPA http://hdl.handle.net/11585/50526 https://doi.org/10.1016/j.gloplacha.2007.08.002 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000253576900025 volume:60 (2008) firstpage:576 lastpage:588 numberofpages:13 journal:GLOBAL AND PLANETARY CHANGE http://hdl.handle.net/11585/50526 doi:10.1016/j.gloplacha.2007.08.002 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-38349164697 TALOS DOME EAST ANTARCTICA GPS GPR SURVEY ICE DIVIDE SNOW ACCUMULATION DOME C info:eu-repo/semantics/article 2008 ftunibolognairis https://doi.org/10.1016/j.gloplacha.2007.08.002 2024-03-21T17:31:21Z Abstract 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 IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) East Antarctica Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) Global and Planetary Change 60 3-4 576 588 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
TALOS DOME EAST ANTARCTICA GPS GPR SURVEY ICE DIVIDE SNOW ACCUMULATION DOME C |
spellingShingle |
TALOS DOME EAST ANTARCTICA GPS GPR SURVEY ICE DIVIDE SNOW ACCUMULATION DOME C Stefano Urbini Massimo Frezzotti Christian Vincent Claudio Scarchilli Michel Fily GANDOLFI, STEFANO VITTUARI, LUCA Historical behaviour of Dome C and Talos Dome (East Antarctica) as investigated by snow accumulation and ice velocity measurements |
topic_facet |
TALOS DOME EAST ANTARCTICA GPS GPR SURVEY ICE DIVIDE SNOW ACCUMULATION DOME C |
description |
Abstract 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 |
Stefano Urbini Massimo Frezzotti Stefano Gandolfi Christian Vincent Claudio Scarchilli Luca Vittuari Michel Fily |
format |
Article in Journal/Newspaper |
author |
Stefano Urbini Massimo Frezzotti Christian Vincent Claudio Scarchilli Michel Fily GANDOLFI, STEFANO VITTUARI, LUCA |
author_facet |
Stefano Urbini Massimo Frezzotti Christian Vincent Claudio Scarchilli Michel Fily GANDOLFI, STEFANO VITTUARI, LUCA |
author_sort |
Stefano Urbini |
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 |
publishDate |
2008 |
url |
http://hdl.handle.net/11585/50526 https://doi.org/10.1016/j.gloplacha.2007.08.002 |
long_lat |
ENVELOPE(158.000,158.000,-73.000,-73.000) |
geographic |
East Antarctica Talos Dome |
geographic_facet |
East Antarctica Talos Dome |
genre |
Antarc* Antarctica East Antarctica ice core Ice Sheet |
genre_facet |
Antarc* Antarctica East Antarctica ice core Ice Sheet |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000253576900025 volume:60 (2008) firstpage:576 lastpage:588 numberofpages:13 journal:GLOBAL AND PLANETARY CHANGE http://hdl.handle.net/11585/50526 doi:10.1016/j.gloplacha.2007.08.002 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-38349164697 |
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 |
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1796318344386707456 |