Greenland ice-sheet surface properties observed by the Seasat-A scatterometer at enhanced resolution
Abstract For 3 months in 1978, the 14.6 GHz Seasat-A scatterometer (SASS) measured the normalized microwave-radar back-scatter coefficient of the Earth’s surface for the purpose of estimating near-surface vector winds over the ocean. SASS also made back-scatter measurements over land and ice regions...
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Cambridge University Press (CUP)
1994
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Online Access: | http://dx.doi.org/10.1017/s0022143000007310 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000007310 |
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crcambridgeupr:10.1017/s0022143000007310 2024-09-15T18:09:01+00:00 Greenland ice-sheet surface properties observed by the Seasat-A scatterometer at enhanced resolution Long, David G. Drinkwater, Mark R. 1994 http://dx.doi.org/10.1017/s0022143000007310 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000007310 en eng Cambridge University Press (CUP) Journal of Glaciology volume 40, issue 135, page 213-230 ISSN 0022-1430 1727-5652 journal-article 1994 crcambridgeupr https://doi.org/10.1017/s0022143000007310 2024-06-26T04:04:25Z Abstract For 3 months in 1978, the 14.6 GHz Seasat-A scatterometer (SASS) measured the normalized microwave-radar back-scatter coefficient of the Earth’s surface for the purpose of estimating near-surface vector winds over the ocean. SASS also made back-scatter measurements over land and ice regions; however, the application of this data has been limited due to the low (50 km) resolution of the measurements. Using a new technique for generating 6 km enhanced-resolution SASS images of the radar back-scatter characteristics, we present a study of the 1978 condition of the Greenland ice sheet. We derive a time-series of back-scatter images spanning the period July–September 1978. These images show the extent of summer ablation along the ice-sheet periphery. Using the data and models relating firn structure and condition to radar back-scatter characteristics, we delineate and map the seasonal extent of zones which appear to correspond to dry-snow, percolation, wet-snow, and ablation facies, over virtually the entire ice sheet. The results provide a base line with which to compare current (ERS-1) and future Greenland radar maps of snow-and ice-surface conditions. Article in Journal/Newspaper Greenland Ice Sheet Journal of Glaciology Cambridge University Press Journal of Glaciology 40 135 213 230 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract For 3 months in 1978, the 14.6 GHz Seasat-A scatterometer (SASS) measured the normalized microwave-radar back-scatter coefficient of the Earth’s surface for the purpose of estimating near-surface vector winds over the ocean. SASS also made back-scatter measurements over land and ice regions; however, the application of this data has been limited due to the low (50 km) resolution of the measurements. Using a new technique for generating 6 km enhanced-resolution SASS images of the radar back-scatter characteristics, we present a study of the 1978 condition of the Greenland ice sheet. We derive a time-series of back-scatter images spanning the period July–September 1978. These images show the extent of summer ablation along the ice-sheet periphery. Using the data and models relating firn structure and condition to radar back-scatter characteristics, we delineate and map the seasonal extent of zones which appear to correspond to dry-snow, percolation, wet-snow, and ablation facies, over virtually the entire ice sheet. The results provide a base line with which to compare current (ERS-1) and future Greenland radar maps of snow-and ice-surface conditions. |
format |
Article in Journal/Newspaper |
author |
Long, David G. Drinkwater, Mark R. |
spellingShingle |
Long, David G. Drinkwater, Mark R. Greenland ice-sheet surface properties observed by the Seasat-A scatterometer at enhanced resolution |
author_facet |
Long, David G. Drinkwater, Mark R. |
author_sort |
Long, David G. |
title |
Greenland ice-sheet surface properties observed by the Seasat-A scatterometer at enhanced resolution |
title_short |
Greenland ice-sheet surface properties observed by the Seasat-A scatterometer at enhanced resolution |
title_full |
Greenland ice-sheet surface properties observed by the Seasat-A scatterometer at enhanced resolution |
title_fullStr |
Greenland ice-sheet surface properties observed by the Seasat-A scatterometer at enhanced resolution |
title_full_unstemmed |
Greenland ice-sheet surface properties observed by the Seasat-A scatterometer at enhanced resolution |
title_sort |
greenland ice-sheet surface properties observed by the seasat-a scatterometer at enhanced resolution |
publisher |
Cambridge University Press (CUP) |
publishDate |
1994 |
url |
http://dx.doi.org/10.1017/s0022143000007310 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000007310 |
genre |
Greenland Ice Sheet Journal of Glaciology |
genre_facet |
Greenland Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 40, issue 135, page 213-230 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000007310 |
container_title |
Journal of Glaciology |
container_volume |
40 |
container_issue |
135 |
container_start_page |
213 |
op_container_end_page |
230 |
_version_ |
1810446403541925888 |