Accumulation and hoar effects on microwave emission in the Greenland ice-sheet dry-snow zones
Abstract The relationships between accumulation and microwave emissivity in the dry-snow regions of the Greenland ice sheet are studied with special focus on hoar formation. With the use of a discrete-ordinate radiative-transfer model, the relative contributions of hoar and accumulation to microwave...
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Cambridge University Press (CUP)
1998
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Online Access: | http://dx.doi.org/10.1017/s0022143000002045 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000002045 |
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crcambridgeupr:10.1017/s0022143000002045 2024-09-15T18:08:55+00:00 Accumulation and hoar effects on microwave emission in the Greenland ice-sheet dry-snow zones Abdalati, Waleed Steffen, Konrad 1998 http://dx.doi.org/10.1017/s0022143000002045 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000002045 en eng Cambridge University Press (CUP) Journal of Glaciology volume 44, issue 148, page 523-531 ISSN 0022-1430 1727-5652 journal-article 1998 crcambridgeupr https://doi.org/10.1017/s0022143000002045 2024-07-31T04:03:03Z Abstract The relationships between accumulation and microwave emissivity in the dry-snow regions of the Greenland ice sheet are studied with special focus on hoar formation. With the use of a discrete-ordinate radiative-transfer model, the relative contributions of hoar and accumulation to microwave omission are examined. The results show that the link between microwave emission and accumulation rates in the dry-snow area of the Greenland ice sheet is significant; however, the emissivity is also dependent on the extent of hoar development. As a result, accumulation estimates based on passive microwave observations in the low-accumulation dry-snow areas will require successful parameterization of hoar formation. Furthermore, the increasing T b , trends that were observed during the 1980s, which have been hypothesized to be related to accumulation changes, may be strongly related to variations in hoar development. Other possible explanations for these observed trends, such as slight surface melt or atmospheric conditions, are also discussed. Article in Journal/Newspaper Greenland Ice Sheet Journal of Glaciology Cambridge University Press Journal of Glaciology 44 148 523 531 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract The relationships between accumulation and microwave emissivity in the dry-snow regions of the Greenland ice sheet are studied with special focus on hoar formation. With the use of a discrete-ordinate radiative-transfer model, the relative contributions of hoar and accumulation to microwave omission are examined. The results show that the link between microwave emission and accumulation rates in the dry-snow area of the Greenland ice sheet is significant; however, the emissivity is also dependent on the extent of hoar development. As a result, accumulation estimates based on passive microwave observations in the low-accumulation dry-snow areas will require successful parameterization of hoar formation. Furthermore, the increasing T b , trends that were observed during the 1980s, which have been hypothesized to be related to accumulation changes, may be strongly related to variations in hoar development. Other possible explanations for these observed trends, such as slight surface melt or atmospheric conditions, are also discussed. |
format |
Article in Journal/Newspaper |
author |
Abdalati, Waleed Steffen, Konrad |
spellingShingle |
Abdalati, Waleed Steffen, Konrad Accumulation and hoar effects on microwave emission in the Greenland ice-sheet dry-snow zones |
author_facet |
Abdalati, Waleed Steffen, Konrad |
author_sort |
Abdalati, Waleed |
title |
Accumulation and hoar effects on microwave emission in the Greenland ice-sheet dry-snow zones |
title_short |
Accumulation and hoar effects on microwave emission in the Greenland ice-sheet dry-snow zones |
title_full |
Accumulation and hoar effects on microwave emission in the Greenland ice-sheet dry-snow zones |
title_fullStr |
Accumulation and hoar effects on microwave emission in the Greenland ice-sheet dry-snow zones |
title_full_unstemmed |
Accumulation and hoar effects on microwave emission in the Greenland ice-sheet dry-snow zones |
title_sort |
accumulation and hoar effects on microwave emission in the greenland ice-sheet dry-snow zones |
publisher |
Cambridge University Press (CUP) |
publishDate |
1998 |
url |
http://dx.doi.org/10.1017/s0022143000002045 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000002045 |
genre |
Greenland Ice Sheet Journal of Glaciology |
genre_facet |
Greenland Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 44, issue 148, page 523-531 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000002045 |
container_title |
Journal of Glaciology |
container_volume |
44 |
container_issue |
148 |
container_start_page |
523 |
op_container_end_page |
531 |
_version_ |
1810446292664451072 |