Interesting Features Of Radar Imagery Of Ice-Covered North Slope Lakes
Abstract Side-looking airborne radar (SLAR) imagery obtained in April-May 1974 from the North Slope of Alaska between Barrow and Harrison Bay indicates that tundra lakes can be separated into two classes based on the strength of the radar returns. Correlations between the areal patterns of the retur...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1977
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0022143000021572 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000021572 |
id |
crcambridgeupr:10.1017/s0022143000021572 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0022143000021572 2024-09-15T17:58:16+00:00 Interesting Features Of Radar Imagery Of Ice-Covered North Slope Lakes Weeks, W. F. Sellmann, P. Campbell, W. J. 1977 http://dx.doi.org/10.1017/s0022143000021572 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000021572 en eng Cambridge University Press (CUP) Journal of Glaciology volume 18, issue 78, page 129-136 ISSN 0022-1430 1727-5652 journal-article 1977 crcambridgeupr https://doi.org/10.1017/s0022143000021572 2024-06-26T04:03:20Z Abstract Side-looking airborne radar (SLAR) imagery obtained in April-May 1974 from the North Slope of Alaska between Barrow and Harrison Bay indicates that tundra lakes can be separated into two classes based on the strength of the radar returns. Correlations between the areal patterns of the returns, limited ground observations on lake depths and water compositions, and information obtained from LANDSAT imagery strongly suggest that areas of fresh-water lakes giving weak returns are frozen completely to the bottom while areas giving strong returns are not. This is a reasonable interpretation inasmuch as the reflection coefficient associated with the high-dielectric-contrast ice-water interface would be roughly twelve times that associated with the low-contrast ice-soil interface. Brackish lakes also give weak returns even when they are not completely frozen. This is the result of the brine present in the lower portion of the ice cover limiting the penetration of the X-band radiation into the ice. The ability to separate tundra lakes rapidly and easily into these two classes via SLAR should be useful in understanding a wide variety of problems. Article in Journal/Newspaper Barrow Journal of Glaciology north slope Tundra Alaska Cambridge University Press Journal of Glaciology 18 78 129 136 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract Side-looking airborne radar (SLAR) imagery obtained in April-May 1974 from the North Slope of Alaska between Barrow and Harrison Bay indicates that tundra lakes can be separated into two classes based on the strength of the radar returns. Correlations between the areal patterns of the returns, limited ground observations on lake depths and water compositions, and information obtained from LANDSAT imagery strongly suggest that areas of fresh-water lakes giving weak returns are frozen completely to the bottom while areas giving strong returns are not. This is a reasonable interpretation inasmuch as the reflection coefficient associated with the high-dielectric-contrast ice-water interface would be roughly twelve times that associated with the low-contrast ice-soil interface. Brackish lakes also give weak returns even when they are not completely frozen. This is the result of the brine present in the lower portion of the ice cover limiting the penetration of the X-band radiation into the ice. The ability to separate tundra lakes rapidly and easily into these two classes via SLAR should be useful in understanding a wide variety of problems. |
format |
Article in Journal/Newspaper |
author |
Weeks, W. F. Sellmann, P. Campbell, W. J. |
spellingShingle |
Weeks, W. F. Sellmann, P. Campbell, W. J. Interesting Features Of Radar Imagery Of Ice-Covered North Slope Lakes |
author_facet |
Weeks, W. F. Sellmann, P. Campbell, W. J. |
author_sort |
Weeks, W. F. |
title |
Interesting Features Of Radar Imagery Of Ice-Covered North Slope Lakes |
title_short |
Interesting Features Of Radar Imagery Of Ice-Covered North Slope Lakes |
title_full |
Interesting Features Of Radar Imagery Of Ice-Covered North Slope Lakes |
title_fullStr |
Interesting Features Of Radar Imagery Of Ice-Covered North Slope Lakes |
title_full_unstemmed |
Interesting Features Of Radar Imagery Of Ice-Covered North Slope Lakes |
title_sort |
interesting features of radar imagery of ice-covered north slope lakes |
publisher |
Cambridge University Press (CUP) |
publishDate |
1977 |
url |
http://dx.doi.org/10.1017/s0022143000021572 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000021572 |
genre |
Barrow Journal of Glaciology north slope Tundra Alaska |
genre_facet |
Barrow Journal of Glaciology north slope Tundra Alaska |
op_source |
Journal of Glaciology volume 18, issue 78, page 129-136 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000021572 |
container_title |
Journal of Glaciology |
container_volume |
18 |
container_issue |
78 |
container_start_page |
129 |
op_container_end_page |
136 |
_version_ |
1810434661759844352 |