Space geodesy as a tool for measuring ice surface velocity in the Dome C region and along the ITASE traverse
Dome C was chosen by the European Project for Ice Coring in Antarctica (EPICA) as the site for the drilling of a deep ice core. This paper presents results from geodetic surveys of ice velocities (absolute and relative) at Dome C and along a transect to Terra Nova Bay. The purpose of the surveys was...
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ftunivroma3iris:oai:iris.uniroma3.it:11590/353617 2024-02-27T08:35:14+00:00 Space geodesy as a tool for measuring ice surface velocity in the Dome C region and along the ITASE traverse Vittuari L. Vincent C. Frezzotti M. Mancini F. Gandolfi S. Bitelli G. Capra A. Vittuari, L. Vincent, C. Frezzotti, M. Mancini, F. Gandolfi, S. Bitelli, G. Capra, A. 2004 http://hdl.handle.net/11590/353617 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000232368400061 volume:39 firstpage:402 lastpage:408 numberofpages:7 journal:ANNALS OF GLACIOLOGY http://hdl.handle.net/11590/353617 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-23844511127 info:eu-repo/semantics/article 2004 ftunivroma3iris 2024-01-31T17:41:08Z Dome C was chosen by the European Project for Ice Coring in Antarctica (EPICA) as the site for the drilling of a deep ice core. This paper presents results from geodetic surveys of ice velocities (absolute and relative) at Dome C and along a transect to Terra Nova Bay. The purpose of the surveys was to provide accurate data for the study of ice dynamics, particularly a strain network comprising 37 poles surveyed in 1995 and again in 1999. Data indicate that the ice surface at the poles closest to the topographic summit moves horizontally by up to a few mm a -1 in a direction consistent with downslope motion of the ice sheet, while 25 km from the summit it moves up to 211 mm a -1. The EPICA drilling site yields an interpolated velocity of about 15 ± 10 mm a -1 in a north-northwesterly direction. Analysis of the velocity field and surface topography reveals that the surface flow centre is nearly co-located with the dome summit, and that both are in a steady-state condition. The measured horizontal velocities are consistent with the remote-sensing result and provide accurate ground-truth control for flow mapping. Seven snow-firn cores, up to 53 m deep, were drilled during the Terra Nova Bay-Dome C traverse. Submerged velocity systems were installed at the borehole and measured using the global positioning system (GPS). First results show a steady-state condition. Measured (horizontal) ice velocities increase from the summit of the ice sheet to the coast, reaching about 28 m a -1 at site GPS2A. Article in Journal/Newspaper Antarc* Antarctica EPICA ice core Ice Sheet Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) Terra Nova Bay |
institution |
Open Polar |
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Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) |
op_collection_id |
ftunivroma3iris |
language |
English |
description |
Dome C was chosen by the European Project for Ice Coring in Antarctica (EPICA) as the site for the drilling of a deep ice core. This paper presents results from geodetic surveys of ice velocities (absolute and relative) at Dome C and along a transect to Terra Nova Bay. The purpose of the surveys was to provide accurate data for the study of ice dynamics, particularly a strain network comprising 37 poles surveyed in 1995 and again in 1999. Data indicate that the ice surface at the poles closest to the topographic summit moves horizontally by up to a few mm a -1 in a direction consistent with downslope motion of the ice sheet, while 25 km from the summit it moves up to 211 mm a -1. The EPICA drilling site yields an interpolated velocity of about 15 ± 10 mm a -1 in a north-northwesterly direction. Analysis of the velocity field and surface topography reveals that the surface flow centre is nearly co-located with the dome summit, and that both are in a steady-state condition. The measured horizontal velocities are consistent with the remote-sensing result and provide accurate ground-truth control for flow mapping. Seven snow-firn cores, up to 53 m deep, were drilled during the Terra Nova Bay-Dome C traverse. Submerged velocity systems were installed at the borehole and measured using the global positioning system (GPS). First results show a steady-state condition. Measured (horizontal) ice velocities increase from the summit of the ice sheet to the coast, reaching about 28 m a -1 at site GPS2A. |
author2 |
Vittuari, L. Vincent, C. Frezzotti, M. Mancini, F. Gandolfi, S. Bitelli, G. Capra, A. |
format |
Article in Journal/Newspaper |
author |
Vittuari L. Vincent C. Frezzotti M. Mancini F. Gandolfi S. Bitelli G. Capra A. |
spellingShingle |
Vittuari L. Vincent C. Frezzotti M. Mancini F. Gandolfi S. Bitelli G. Capra A. Space geodesy as a tool for measuring ice surface velocity in the Dome C region and along the ITASE traverse |
author_facet |
Vittuari L. Vincent C. Frezzotti M. Mancini F. Gandolfi S. Bitelli G. Capra A. |
author_sort |
Vittuari L. |
title |
Space geodesy as a tool for measuring ice surface velocity in the Dome C region and along the ITASE traverse |
title_short |
Space geodesy as a tool for measuring ice surface velocity in the Dome C region and along the ITASE traverse |
title_full |
Space geodesy as a tool for measuring ice surface velocity in the Dome C region and along the ITASE traverse |
title_fullStr |
Space geodesy as a tool for measuring ice surface velocity in the Dome C region and along the ITASE traverse |
title_full_unstemmed |
Space geodesy as a tool for measuring ice surface velocity in the Dome C region and along the ITASE traverse |
title_sort |
space geodesy as a tool for measuring ice surface velocity in the dome c region and along the itase traverse |
publishDate |
2004 |
url |
http://hdl.handle.net/11590/353617 |
geographic |
Terra Nova Bay |
geographic_facet |
Terra Nova Bay |
genre |
Antarc* Antarctica EPICA ice core Ice Sheet |
genre_facet |
Antarc* Antarctica EPICA ice core Ice Sheet |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000232368400061 volume:39 firstpage:402 lastpage:408 numberofpages:7 journal:ANNALS OF GLACIOLOGY http://hdl.handle.net/11590/353617 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-23844511127 |
_version_ |
1792041700066066432 |