Airborne-radar studies: Ice Streams A, B and C, West Antarctica
Abstract Digital airborne-radar data were collected during the 1988–89 Antarctic field season in six gridded blocks covering the upstream parts of Ice Streams A, Β and C. An automated processing procedure was developed for picking onset times, converting travel times, interpolating missing data, con...
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Online Access: | http://dx.doi.org/10.1017/s0022143000016397 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000016397 |
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crcambridgeupr:10.1017/s0022143000016397 2024-03-03T08:37:15+00:00 Airborne-radar studies: Ice Streams A, B and C, West Antarctica Retzlaff, R. Lord, N. Bentley, C.R. 1993 http://dx.doi.org/10.1017/s0022143000016397 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000016397 en eng Cambridge University Press (CUP) Journal of Glaciology volume 39, issue 133, page 495-506 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1993 crcambridgeupr https://doi.org/10.1017/s0022143000016397 2024-02-08T08:36:10Z Abstract Digital airborne-radar data were collected during the 1988–89 Antarctic field season in six gridded blocks covering the upstream parts of Ice Streams A, Β and C. An automated processing procedure was developed for picking onset times, converting travel times, interpolating missing data, converting pressure-transducer readings, correcting navigational drift, performing cross-over analysis and zeroing remanent cross-over errors. Cross-over analysis was used to remove the effects of temporal variations in atmospheric pressure and to estimate errors. Interpolation between flight lines was carried out using the Kriging method. Surface elevation was referred to the Rapp Set A geoid by tying the gridded surface to satellite-surveyed ground stations, using a planar-model fit. Maps of surface elevation, ice thickness and bottom topography with standard-error estimates of 4–9 m for surface elevation and 30–60 m for ice thickness and bottom topography were produced. These maps show that the locations of the ice streams are not clearly reflected in either the surface or basal topography, so are presumably controled by basal or internal conditions, that there is no clearly demarcated transition zone between sheet flow and streaming flow, that there is no clear cut evidence for the capture of the catchment of Ice Stream C by Ice Stream B, but that Ice Stream Β does drain virtually the entire region between the lateral boundaries of Ice Streams A and C. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Stream B Ice Stream C Journal of Glaciology West Antarctica Cambridge University Press Antarctic West Antarctica Journal of Glaciology 39 133 495 506 |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Retzlaff, R. Lord, N. Bentley, C.R. Airborne-radar studies: Ice Streams A, B and C, West Antarctica |
topic_facet |
Earth-Surface Processes |
description |
Abstract Digital airborne-radar data were collected during the 1988–89 Antarctic field season in six gridded blocks covering the upstream parts of Ice Streams A, Β and C. An automated processing procedure was developed for picking onset times, converting travel times, interpolating missing data, converting pressure-transducer readings, correcting navigational drift, performing cross-over analysis and zeroing remanent cross-over errors. Cross-over analysis was used to remove the effects of temporal variations in atmospheric pressure and to estimate errors. Interpolation between flight lines was carried out using the Kriging method. Surface elevation was referred to the Rapp Set A geoid by tying the gridded surface to satellite-surveyed ground stations, using a planar-model fit. Maps of surface elevation, ice thickness and bottom topography with standard-error estimates of 4–9 m for surface elevation and 30–60 m for ice thickness and bottom topography were produced. These maps show that the locations of the ice streams are not clearly reflected in either the surface or basal topography, so are presumably controled by basal or internal conditions, that there is no clearly demarcated transition zone between sheet flow and streaming flow, that there is no clear cut evidence for the capture of the catchment of Ice Stream C by Ice Stream B, but that Ice Stream Β does drain virtually the entire region between the lateral boundaries of Ice Streams A and C. |
format |
Article in Journal/Newspaper |
author |
Retzlaff, R. Lord, N. Bentley, C.R. |
author_facet |
Retzlaff, R. Lord, N. Bentley, C.R. |
author_sort |
Retzlaff, R. |
title |
Airborne-radar studies: Ice Streams A, B and C, West Antarctica |
title_short |
Airborne-radar studies: Ice Streams A, B and C, West Antarctica |
title_full |
Airborne-radar studies: Ice Streams A, B and C, West Antarctica |
title_fullStr |
Airborne-radar studies: Ice Streams A, B and C, West Antarctica |
title_full_unstemmed |
Airborne-radar studies: Ice Streams A, B and C, West Antarctica |
title_sort |
airborne-radar studies: ice streams a, b and c, west antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
1993 |
url |
http://dx.doi.org/10.1017/s0022143000016397 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000016397 |
geographic |
Antarctic West Antarctica |
geographic_facet |
Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctica Ice Stream B Ice Stream C Journal of Glaciology West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Stream B Ice Stream C Journal of Glaciology West Antarctica |
op_source |
Journal of Glaciology volume 39, issue 133, page 495-506 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000016397 |
container_title |
Journal of Glaciology |
container_volume |
39 |
container_issue |
133 |
container_start_page |
495 |
op_container_end_page |
506 |
_version_ |
1792497822717706240 |