Measuring geophysical parameters of the Greenland ice sheet using airborne radar altimetry
Abstract This paper presents radar-altimeter scattering models for each of the diagenetic zones of the Greenland ice sheet. AAFE radar-altimeter waveforms obtained during the 1991 and 1993 NASA multi-sensor airborne altimetry experiments over Greenland reveal that the Ku-band return pulse changes si...
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Cambridge University Press (CUP)
1995
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Online Access: | http://dx.doi.org/10.1017/s0022143000034924 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000034924 |
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crcambridgeupr:10.1017/s0022143000034924 2024-03-03T08:44:57+00:00 Measuring geophysical parameters of the Greenland ice sheet using airborne radar altimetry Ferraro, Ellen J. Swift, Calvin T. 1995 http://dx.doi.org/10.1017/s0022143000034924 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000034924 en eng Cambridge University Press (CUP) Journal of Glaciology volume 41, issue 139, page 607-618 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1995 crcambridgeupr https://doi.org/10.1017/s0022143000034924 2024-02-08T08:38:15Z Abstract This paper presents radar-altimeter scattering models for each of the diagenetic zones of the Greenland ice sheet. AAFE radar-altimeter waveforms obtained during the 1991 and 1993 NASA multi-sensor airborne altimetry experiments over Greenland reveal that the Ku-band return pulse changes significantly with the different diagenetic zones. These changes are due to varying amounts of surface and volume scattering in the return waveform. In the ablation and soaked zones, where surface scattering dominates the AAFE return, geophysical parameters such as rms surface height and rms surface slope are obtained by fitting the waveforms to a surface-scattering model. Waveforms from the percolation zone show that sub-sruface ice features have a much more significant effect on the return pulse than the surrounding snowpack. Model percolation waveforms, created using a combined surface- and volume-scattering model and an ice-feature distribution obtained during the 1993 field season, agree well with actual AAFE waveforms taken in the same time period. Using a combined surface- and volume-scattering model for the dry-snow-zone return waveforms, the rms surface height and slope and the attenuation coefficient of the snowpack are obtained. These scattering models not only allow geophysical parameters of the ice sheet to he measured but also help in the understanding of satellite radar-altimeter data. Article in Journal/Newspaper Greenland Ice Sheet Journal of Glaciology Cambridge University Press Greenland Journal of Glaciology 41 139 607 618 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Ferraro, Ellen J. Swift, Calvin T. Measuring geophysical parameters of the Greenland ice sheet using airborne radar altimetry |
topic_facet |
Earth-Surface Processes |
description |
Abstract This paper presents radar-altimeter scattering models for each of the diagenetic zones of the Greenland ice sheet. AAFE radar-altimeter waveforms obtained during the 1991 and 1993 NASA multi-sensor airborne altimetry experiments over Greenland reveal that the Ku-band return pulse changes significantly with the different diagenetic zones. These changes are due to varying amounts of surface and volume scattering in the return waveform. In the ablation and soaked zones, where surface scattering dominates the AAFE return, geophysical parameters such as rms surface height and rms surface slope are obtained by fitting the waveforms to a surface-scattering model. Waveforms from the percolation zone show that sub-sruface ice features have a much more significant effect on the return pulse than the surrounding snowpack. Model percolation waveforms, created using a combined surface- and volume-scattering model and an ice-feature distribution obtained during the 1993 field season, agree well with actual AAFE waveforms taken in the same time period. Using a combined surface- and volume-scattering model for the dry-snow-zone return waveforms, the rms surface height and slope and the attenuation coefficient of the snowpack are obtained. These scattering models not only allow geophysical parameters of the ice sheet to he measured but also help in the understanding of satellite radar-altimeter data. |
format |
Article in Journal/Newspaper |
author |
Ferraro, Ellen J. Swift, Calvin T. |
author_facet |
Ferraro, Ellen J. Swift, Calvin T. |
author_sort |
Ferraro, Ellen J. |
title |
Measuring geophysical parameters of the Greenland ice sheet using airborne radar altimetry |
title_short |
Measuring geophysical parameters of the Greenland ice sheet using airborne radar altimetry |
title_full |
Measuring geophysical parameters of the Greenland ice sheet using airborne radar altimetry |
title_fullStr |
Measuring geophysical parameters of the Greenland ice sheet using airborne radar altimetry |
title_full_unstemmed |
Measuring geophysical parameters of the Greenland ice sheet using airborne radar altimetry |
title_sort |
measuring geophysical parameters of the greenland ice sheet using airborne radar altimetry |
publisher |
Cambridge University Press (CUP) |
publishDate |
1995 |
url |
http://dx.doi.org/10.1017/s0022143000034924 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000034924 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet Journal of Glaciology |
genre_facet |
Greenland Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 41, issue 139, page 607-618 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000034924 |
container_title |
Journal of Glaciology |
container_volume |
41 |
container_issue |
139 |
container_start_page |
607 |
op_container_end_page |
618 |
_version_ |
1792500473411928064 |