Geophysical survey at Talos Dome (East Antartica)
Talos Dome is an ice dome on the edge of the East Antarctic plateau; because accumulation is higher here than in other domes of East Antarctica, the ice preserves a good geochemical and palaeoclimatic record. A new map of the Talos Dome area locates the dome summit using the global positioning syste...
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ftunivmodena:oai:iris.unimore.it:11380/1056927 2024-04-21T07:52:35+00:00 Geophysical survey at Talos Dome (East Antartica) Frezzotti, M Bitelli, G Gandolfi, S De Michelis, P Urbini, S Vittuari, L Zirizzotti, A. MANCINI, Francesco Frezzotti, M Bitelli, G Gandolfi, S De Michelis, P Mancini, Francesco Urbini, S Vittuari, L Zirizzotti, A. 2003 STAMPA http://hdl.handle.net/11380/1056927 eng eng volume:8 firstpage:117 lastpage:120 journal:TERRA ANTARTICA REPORTS http://hdl.handle.net/11380/1056927 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-1842728369 info:eu-repo/semantics/closedAccess Geophysical survey Antarctica Talos Dome GPS info:eu-repo/semantics/article 2003 ftunivmodena 2024-03-28T01:20:47Z Talos Dome is an ice dome on the edge of the East Antarctic plateau; because accumulation is higher here than in other domes of East Antarctica, the ice preserves a good geochemical and palaeoclimatic record. A new map of the Talos Dome area locates the dome summit using the global positioning system (GPS) (72°47′14′′S, 159°04′2′′E; 2318.5 m elevation (WGS84)). A surface strain network of nine stakes was measured using GPS. Data indicate that the stake closest to the summit moves south-southeast at a few cm a -1. The other stakes, located 8 km away, move up to 0.33 m a -1. Airborne radar measurements indicate that the bedrock at the Talos Dome summit is about 400 m in elevation, and that it is covered by about 1900 m of ice. Snow radar and GPS surveys show that internal layering is continuous and horizontal in the summit area (15 km radius). The depth distribution analysis of snow radar layers reveals that accumulation decreases downwind of the dome (north-northeast) and increases upwind (south-southwest). The palaeomorphology of the dome has changed during the past 500 years, probably due to variation in spatial distribution of snow accumulation, driven by wind sublimation. In order to calculate a preliminary age vs depth profile for Talos Dome, a simple one-dimensional steady-state model was formulated. This model predicts that the ice 100 m above the bedrock may cover one glacial-interglacial period. Article in Journal/Newspaper Antarc* Antarctic Antarctica antartic* East Antarctica Archivio della ricerca dell'Università di Modena e Reggio Emilia (Unimore: IRIS) |
institution |
Open Polar |
collection |
Archivio della ricerca dell'Università di Modena e Reggio Emilia (Unimore: IRIS) |
op_collection_id |
ftunivmodena |
language |
English |
topic |
Geophysical survey Antarctica Talos Dome GPS |
spellingShingle |
Geophysical survey Antarctica Talos Dome GPS Frezzotti, M Bitelli, G Gandolfi, S De Michelis, P Urbini, S Vittuari, L Zirizzotti, A. MANCINI, Francesco Geophysical survey at Talos Dome (East Antartica) |
topic_facet |
Geophysical survey Antarctica Talos Dome GPS |
description |
Talos Dome is an ice dome on the edge of the East Antarctic plateau; because accumulation is higher here than in other domes of East Antarctica, the ice preserves a good geochemical and palaeoclimatic record. A new map of the Talos Dome area locates the dome summit using the global positioning system (GPS) (72°47′14′′S, 159°04′2′′E; 2318.5 m elevation (WGS84)). A surface strain network of nine stakes was measured using GPS. Data indicate that the stake closest to the summit moves south-southeast at a few cm a -1. The other stakes, located 8 km away, move up to 0.33 m a -1. Airborne radar measurements indicate that the bedrock at the Talos Dome summit is about 400 m in elevation, and that it is covered by about 1900 m of ice. Snow radar and GPS surveys show that internal layering is continuous and horizontal in the summit area (15 km radius). The depth distribution analysis of snow radar layers reveals that accumulation decreases downwind of the dome (north-northeast) and increases upwind (south-southwest). The palaeomorphology of the dome has changed during the past 500 years, probably due to variation in spatial distribution of snow accumulation, driven by wind sublimation. In order to calculate a preliminary age vs depth profile for Talos Dome, a simple one-dimensional steady-state model was formulated. This model predicts that the ice 100 m above the bedrock may cover one glacial-interglacial period. |
author2 |
Frezzotti, M Bitelli, G Gandolfi, S De Michelis, P Mancini, Francesco Urbini, S Vittuari, L Zirizzotti, A. |
format |
Article in Journal/Newspaper |
author |
Frezzotti, M Bitelli, G Gandolfi, S De Michelis, P Urbini, S Vittuari, L Zirizzotti, A. MANCINI, Francesco |
author_facet |
Frezzotti, M Bitelli, G Gandolfi, S De Michelis, P Urbini, S Vittuari, L Zirizzotti, A. MANCINI, Francesco |
author_sort |
Frezzotti, M |
title |
Geophysical survey at Talos Dome (East Antartica) |
title_short |
Geophysical survey at Talos Dome (East Antartica) |
title_full |
Geophysical survey at Talos Dome (East Antartica) |
title_fullStr |
Geophysical survey at Talos Dome (East Antartica) |
title_full_unstemmed |
Geophysical survey at Talos Dome (East Antartica) |
title_sort |
geophysical survey at talos dome (east antartica) |
publishDate |
2003 |
url |
http://hdl.handle.net/11380/1056927 |
genre |
Antarc* Antarctic Antarctica antartic* East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica antartic* East Antarctica |
op_relation |
volume:8 firstpage:117 lastpage:120 journal:TERRA ANTARTICA REPORTS http://hdl.handle.net/11380/1056927 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-1842728369 |
op_rights |
info:eu-repo/semantics/closedAccess |
_version_ |
1796935807206948864 |