IDENTIFICATION OF SUBGLACIAL LAKES USING ERS-1 RADAR ALTIMETER
Radar-altimeter data from ERS-1 allow detailed topographic mapping of Antarctica to 82-degrees-S to be carried out, revealing several notable surface features. Among these is the large subglacial lake near Vostok which is mapped here in detail. The central part of the lake is found to have an except...
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INT GLACIOL SOC
1993
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ftucl:oai:eprints.ucl.ac.uk.OAI2:154941 2023-05-15T13:42:34+02:00 IDENTIFICATION OF SUBGLACIAL LAKES USING ERS-1 RADAR ALTIMETER RIDLEY, JK CUDLIP, W LAXON, SW 1993 http://discovery.ucl.ac.uk/154941/ unknown INT GLACIOL SOC J GLACIOL , 39 (133) 625 - 634. (1993) CONTINENTAL ICE SHEETS TOPOGRAPHY MODEL Article 1993 ftucl 2016-01-21T23:11:26Z Radar-altimeter data from ERS-1 allow detailed topographic mapping of Antarctica to 82-degrees-S to be carried out, revealing several notable surface features. Among these is the large subglacial lake near Vostok which is mapped here in detail. The central part of the lake is found to have an exceptionally smooth surface with r.m.s. elevation variations of less than 0.2 m. A search for other large Antarctic lakes in the data is made based on the smoothness and low gradient of the surface. A number of other flat areas are identified with lake locations previously determined from radio-echo sounding observations. However, radar-altimeter observations show that a minimum lake size of 20 km is required for a surface above a lake to become flat. Numerous bowl-like features can be seen in the surface topography, and these may be associated with intermediate-sized subglacial lakes. It is determined that high spatial-resolution radar altimetery could be used to identify subglacial lakes greater than 10 km in lateral extent. Flat regions of the ice sheet are particularly useful as they may be used as height-reference surfaces to help fix the orbits of radar-altimeter satellites. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet University College London: UCL Discovery Antarctic |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
unknown |
topic |
CONTINENTAL ICE SHEETS TOPOGRAPHY MODEL |
spellingShingle |
CONTINENTAL ICE SHEETS TOPOGRAPHY MODEL RIDLEY, JK CUDLIP, W LAXON, SW IDENTIFICATION OF SUBGLACIAL LAKES USING ERS-1 RADAR ALTIMETER |
topic_facet |
CONTINENTAL ICE SHEETS TOPOGRAPHY MODEL |
description |
Radar-altimeter data from ERS-1 allow detailed topographic mapping of Antarctica to 82-degrees-S to be carried out, revealing several notable surface features. Among these is the large subglacial lake near Vostok which is mapped here in detail. The central part of the lake is found to have an exceptionally smooth surface with r.m.s. elevation variations of less than 0.2 m. A search for other large Antarctic lakes in the data is made based on the smoothness and low gradient of the surface. A number of other flat areas are identified with lake locations previously determined from radio-echo sounding observations. However, radar-altimeter observations show that a minimum lake size of 20 km is required for a surface above a lake to become flat. Numerous bowl-like features can be seen in the surface topography, and these may be associated with intermediate-sized subglacial lakes. It is determined that high spatial-resolution radar altimetery could be used to identify subglacial lakes greater than 10 km in lateral extent. Flat regions of the ice sheet are particularly useful as they may be used as height-reference surfaces to help fix the orbits of radar-altimeter satellites. |
format |
Article in Journal/Newspaper |
author |
RIDLEY, JK CUDLIP, W LAXON, SW |
author_facet |
RIDLEY, JK CUDLIP, W LAXON, SW |
author_sort |
RIDLEY, JK |
title |
IDENTIFICATION OF SUBGLACIAL LAKES USING ERS-1 RADAR ALTIMETER |
title_short |
IDENTIFICATION OF SUBGLACIAL LAKES USING ERS-1 RADAR ALTIMETER |
title_full |
IDENTIFICATION OF SUBGLACIAL LAKES USING ERS-1 RADAR ALTIMETER |
title_fullStr |
IDENTIFICATION OF SUBGLACIAL LAKES USING ERS-1 RADAR ALTIMETER |
title_full_unstemmed |
IDENTIFICATION OF SUBGLACIAL LAKES USING ERS-1 RADAR ALTIMETER |
title_sort |
identification of subglacial lakes using ers-1 radar altimeter |
publisher |
INT GLACIOL SOC |
publishDate |
1993 |
url |
http://discovery.ucl.ac.uk/154941/ |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet |
op_source |
J GLACIOL , 39 (133) 625 - 634. (1993) |
_version_ |
1766169806431584256 |