Geophysical survey at Talos Dome, East Antarctica: the search for a new deep-drilling site
ABSTRACT. 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 positio...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.472.1693 2023-05-15T13:53:22+02:00 Geophysical survey at Talos Dome, East Antarctica: the search for a new deep-drilling site Achille Zirizzottl The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.472.1693 http://www.taldice.org/pub/talos/Geophysic/Frezzotti_AG_2004.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.472.1693 http://www.taldice.org/pub/talos/Geophysic/Frezzotti_AG_2004.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.taldice.org/pub/talos/Geophysic/Frezzotti_AG_2004.pdf text ftciteseerx 2016-01-08T07:21:05Z ABSTRACT. 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; 2318.5m 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 cma–1. The other stakes, located 8 km away, move up to 0.33ma–1. Airborne radar measurements indicate that the bedrock at the Talos Dome summit is about 400m in elevation, and that it is covered by about 1900m 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 100m above the bedrock may cover one glacial–interglacial period. Text Antarc* Antarctic Antarctica East Antarctica Unknown Antarctic East Antarctica Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) |
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ftciteseerx |
language |
English |
description |
ABSTRACT. 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; 2318.5m 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 cma–1. The other stakes, located 8 km away, move up to 0.33ma–1. Airborne radar measurements indicate that the bedrock at the Talos Dome summit is about 400m in elevation, and that it is covered by about 1900m 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 100m above the bedrock may cover one glacial–interglacial period. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Achille Zirizzottl |
spellingShingle |
Achille Zirizzottl Geophysical survey at Talos Dome, East Antarctica: the search for a new deep-drilling site |
author_facet |
Achille Zirizzottl |
author_sort |
Achille Zirizzottl |
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 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.472.1693 http://www.taldice.org/pub/talos/Geophysic/Frezzotti_AG_2004.pdf |
long_lat |
ENVELOPE(158.000,158.000,-73.000,-73.000) |
geographic |
Antarctic East Antarctica Talos Dome |
geographic_facet |
Antarctic East Antarctica Talos Dome |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_source |
http://www.taldice.org/pub/talos/Geophysic/Frezzotti_AG_2004.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.472.1693 http://www.taldice.org/pub/talos/Geophysic/Frezzotti_AG_2004.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766258415575760896 |