Annals of Glaciology 41 2005 Bedrock topography and wind erosion sites in East Antarctica: observations from the 2002 US-ITASE traverse
ABSTRACT. Ice stratigraphy from deep-penetrating radar data collected during the 2002 US International Trans-Antarctic Scientific Expedition (US-ITASE) traverse shows evidence of a significant erosion surface and drift-filled basin related to a previously undiscovered 1400 m subglacial mountain betw...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.366.6545 2023-05-15T13:56:12+02:00 Annals of Glaciology 41 2005 Bedrock topography and wind erosion sites in East Antarctica: observations from the 2002 US-ITASE traverse Brian C. Welch Robert W. Jacobel The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.366.6545 http://www.stolaf.edu/other/cegsic/publications/Annals_41/AnnalsGlac--Welch_Jacobel_2005_EAIS_wind_scour_v41_p92.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.366.6545 http://www.stolaf.edu/other/cegsic/publications/Annals_41/AnnalsGlac--Welch_Jacobel_2005_EAIS_wind_scour_v41_p92.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.stolaf.edu/other/cegsic/publications/Annals_41/AnnalsGlac--Welch_Jacobel_2005_EAIS_wind_scour_v41_p92.pdf text ftciteseerx 2016-01-08T01:04:47Z ABSTRACT. Ice stratigraphy from deep-penetrating radar data collected during the 2002 US International Trans-Antarctic Scientific Expedition (US-ITASE) traverse shows evidence of a significant erosion surface and drift-filled basin related to a previously undiscovered 1400 m subglacial mountain between Hercules Dome (87842 0 S, 1088 W) and South Pole. The 3 MHz radar profile crosses three subglacial mountains at approximately 458 to the ice-flow direction. Cross-cutting reflectors in the top 500 m of ice stratigraphy are interpreted as angular unconformities resulting from wind erosion as the ice deforms over the mountain tops. The unconformities correlate locally with zones of high RADARSAT reflectivity. Several nearby sites with similar relatively high RADARSAT reflectivity adjacent to the traverse indicate that active wind erosion may be taking place at these locations as well. Based on the local correlation between surface wind scour and subglacial topography, we interpret the nearby cluster of bright RADARSAT reflectivity to indicate the presence of a small range of subglacial mountains. The ability to trace isochronal stratigraphy, associated with scour sites using shallow and deep radar, to nearby dated ice cores presents the possibility of exploiting wind-scour zones to access well-dated older ice with shallow-coring equipment. Text Antarc* Antarctic Antarctica East Antarctica South pole South pole Unknown Antarctic East Antarctica South Pole Hercules ENVELOPE(161.450,161.450,-77.483,-77.483) Hercules Dome ENVELOPE(-105.000,-105.000,-86.000,-86.000) |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
ABSTRACT. Ice stratigraphy from deep-penetrating radar data collected during the 2002 US International Trans-Antarctic Scientific Expedition (US-ITASE) traverse shows evidence of a significant erosion surface and drift-filled basin related to a previously undiscovered 1400 m subglacial mountain between Hercules Dome (87842 0 S, 1088 W) and South Pole. The 3 MHz radar profile crosses three subglacial mountains at approximately 458 to the ice-flow direction. Cross-cutting reflectors in the top 500 m of ice stratigraphy are interpreted as angular unconformities resulting from wind erosion as the ice deforms over the mountain tops. The unconformities correlate locally with zones of high RADARSAT reflectivity. Several nearby sites with similar relatively high RADARSAT reflectivity adjacent to the traverse indicate that active wind erosion may be taking place at these locations as well. Based on the local correlation between surface wind scour and subglacial topography, we interpret the nearby cluster of bright RADARSAT reflectivity to indicate the presence of a small range of subglacial mountains. The ability to trace isochronal stratigraphy, associated with scour sites using shallow and deep radar, to nearby dated ice cores presents the possibility of exploiting wind-scour zones to access well-dated older ice with shallow-coring equipment. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Brian C. Welch Robert W. Jacobel |
spellingShingle |
Brian C. Welch Robert W. Jacobel Annals of Glaciology 41 2005 Bedrock topography and wind erosion sites in East Antarctica: observations from the 2002 US-ITASE traverse |
author_facet |
Brian C. Welch Robert W. Jacobel |
author_sort |
Brian C. Welch |
title |
Annals of Glaciology 41 2005 Bedrock topography and wind erosion sites in East Antarctica: observations from the 2002 US-ITASE traverse |
title_short |
Annals of Glaciology 41 2005 Bedrock topography and wind erosion sites in East Antarctica: observations from the 2002 US-ITASE traverse |
title_full |
Annals of Glaciology 41 2005 Bedrock topography and wind erosion sites in East Antarctica: observations from the 2002 US-ITASE traverse |
title_fullStr |
Annals of Glaciology 41 2005 Bedrock topography and wind erosion sites in East Antarctica: observations from the 2002 US-ITASE traverse |
title_full_unstemmed |
Annals of Glaciology 41 2005 Bedrock topography and wind erosion sites in East Antarctica: observations from the 2002 US-ITASE traverse |
title_sort |
annals of glaciology 41 2005 bedrock topography and wind erosion sites in east antarctica: observations from the 2002 us-itase traverse |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.366.6545 http://www.stolaf.edu/other/cegsic/publications/Annals_41/AnnalsGlac--Welch_Jacobel_2005_EAIS_wind_scour_v41_p92.pdf |
long_lat |
ENVELOPE(161.450,161.450,-77.483,-77.483) ENVELOPE(-105.000,-105.000,-86.000,-86.000) |
geographic |
Antarctic East Antarctica South Pole Hercules Hercules Dome |
geographic_facet |
Antarctic East Antarctica South Pole Hercules Hercules Dome |
genre |
Antarc* Antarctic Antarctica East Antarctica South pole South pole |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica South pole South pole |
op_source |
http://www.stolaf.edu/other/cegsic/publications/Annals_41/AnnalsGlac--Welch_Jacobel_2005_EAIS_wind_scour_v41_p92.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.366.6545 http://www.stolaf.edu/other/cegsic/publications/Annals_41/AnnalsGlac--Welch_Jacobel_2005_EAIS_wind_scour_v41_p92.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766263566256570368 |