Geophysical survey at Talos Dome, East Antarctica: The search for a new deep-drilling site
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...
Published in: | Annals of Glaciology |
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International Glaciology Society
2004
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Online Access: | http://hdl.handle.net/10281/17860 https://doi.org/10.3189/172756404781814591 |
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ftunivmilanobic:oai:boa.unimib.it:10281/17860 2024-04-21T07:49:59+00:00 Geophysical survey at Talos Dome, East Antarctica: The search for a new deep-drilling site Frezzotti, M Bitelli, G De Michelis, B Deponti, A Forieri, A Gandolfi, S Mancini, F Remy, F Tabacco, I Urbini, S Vittuari, L Zirizzotti, L. MAGGI, VALTER Frezzotti, M Bitelli, G De Michelis, B Deponti, A Forieri, A Gandolfi, S Maggi, V Mancini, F Remy, F Tabacco, I Urbini, S Vittuari, L Zirizzotti, L 2004 http://hdl.handle.net/10281/17860 https://doi.org/10.3189/172756404781814591 eng eng International Glaciology Society info:eu-repo/semantics/altIdentifier/wos/WOS:000232368400064 volume:39 firstpage:423 lastpage:432 journal:ANNALS OF GLACIOLOGY http://hdl.handle.net/10281/17860 doi:10.3189/172756404781814591 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-23844462467 Antarctica mass balance radar survey info:eu-repo/semantics/article 2004 ftunivmilanobic https://doi.org/10.3189/172756404781814591 2024-03-28T01:02:31Z 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 East Antarctica Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) Annals of Glaciology 39 423 432 |
institution |
Open Polar |
collection |
Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) |
op_collection_id |
ftunivmilanobic |
language |
English |
topic |
Antarctica mass balance radar survey |
spellingShingle |
Antarctica mass balance radar survey Frezzotti, M Bitelli, G De Michelis, B Deponti, A Forieri, A Gandolfi, S Mancini, F Remy, F Tabacco, I Urbini, S Vittuari, L Zirizzotti, L. MAGGI, VALTER Geophysical survey at Talos Dome, East Antarctica: The search for a new deep-drilling site |
topic_facet |
Antarctica mass balance radar survey |
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 De Michelis, B Deponti, A Forieri, A Gandolfi, S Maggi, V Mancini, F Remy, F Tabacco, I Urbini, S Vittuari, L Zirizzotti, L |
format |
Article in Journal/Newspaper |
author |
Frezzotti, M Bitelli, G De Michelis, B Deponti, A Forieri, A Gandolfi, S Mancini, F Remy, F Tabacco, I Urbini, S Vittuari, L Zirizzotti, L. MAGGI, VALTER |
author_facet |
Frezzotti, M Bitelli, G De Michelis, B Deponti, A Forieri, A Gandolfi, S Mancini, F Remy, F Tabacco, I Urbini, S Vittuari, L Zirizzotti, L. MAGGI, VALTER |
author_sort |
Frezzotti, M |
title |
Geophysical survey at Talos Dome, East Antarctica: The search for a new deep-drilling site |
title_short |
Geophysical survey at Talos Dome, East Antarctica: The search for a new deep-drilling site |
title_full |
Geophysical survey at Talos Dome, East Antarctica: The search for a new deep-drilling site |
title_fullStr |
Geophysical survey at Talos Dome, East Antarctica: The search for a new deep-drilling site |
title_full_unstemmed |
Geophysical survey at Talos Dome, East Antarctica: The search for a new deep-drilling site |
title_sort |
geophysical survey at talos dome, east antarctica: the search for a new deep-drilling site |
publisher |
International Glaciology Society |
publishDate |
2004 |
url |
http://hdl.handle.net/10281/17860 https://doi.org/10.3189/172756404781814591 |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000232368400064 volume:39 firstpage:423 lastpage:432 journal:ANNALS OF GLACIOLOGY http://hdl.handle.net/10281/17860 doi:10.3189/172756404781814591 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-23844462467 |
op_doi |
https://doi.org/10.3189/172756404781814591 |
container_title |
Annals of Glaciology |
container_volume |
39 |
container_start_page |
423 |
op_container_end_page |
432 |
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1796933886964400128 |