Variations in brightness temperature over cold first-year sea ice near Tuktoyaktuk, Northwest Territories
Microwave radiometric temperature T(B) profiles of first-year sea ice were obtained along 70- to 100-m traverses, with sled-mounted radiometers at 10, 18.7, 33.6, and 37 GHz and an effective spot size of 30 cm. Measurements of T(B) as a function of nadir angle were obtained at selected sites along t...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19860050811 2023-05-15T17:46:40+02:00 Variations in brightness temperature over cold first-year sea ice near Tuktoyaktuk, Northwest Territories Lohanick, A. W. Grenfell, T. C. Unclassified, Unlimited, Publicly available Apr 15, 1986 http://ntrs.nasa.gov/search.jsp?R=19860050811 unknown http://ntrs.nasa.gov/search.jsp?R=19860050811 Accession ID: 86A35549 Copyright Other Sources 48 Journal of Geophysical Research; 91; 5133-514 AD-A174148 AD-A177219 1986 ftnasantrs 2012-02-15T16:47:27Z Microwave radiometric temperature T(B) profiles of first-year sea ice were obtained along 70- to 100-m traverses, with sled-mounted radiometers at 10, 18.7, 33.6, and 37 GHz and an effective spot size of 30 cm. Measurements of T(B) as a function of nadir angle were obtained at selected sites along the traverses. Snow and ice properties were recorded and correlated with the T(B) measurements to infer the effect of snow cover and ice conditions on the radiometric temperature. T(B) correlated positively with the brine volume profile in the ice at several sites, suggesting that brine volume has a strong effect on T(B) under these conditions. An overall statistical comparison of snow thickness with T(B), when compared with previously published models, suggests that the effect of snow cover on the microwave transmission coefficient of the snow/ice interface may be an important contribution to the radiometric temperature at these frequencies. A model is proposed to explain the data. Other/Unknown Material Northwest Territories Sea ice Tuktoyaktuk NASA Technical Reports Server (NTRS) Northwest Territories Tuktoyaktuk ENVELOPE(-133.006,-133.006,69.425,69.425) |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
48 |
spellingShingle |
48 Lohanick, A. W. Grenfell, T. C. Variations in brightness temperature over cold first-year sea ice near Tuktoyaktuk, Northwest Territories |
topic_facet |
48 |
description |
Microwave radiometric temperature T(B) profiles of first-year sea ice were obtained along 70- to 100-m traverses, with sled-mounted radiometers at 10, 18.7, 33.6, and 37 GHz and an effective spot size of 30 cm. Measurements of T(B) as a function of nadir angle were obtained at selected sites along the traverses. Snow and ice properties were recorded and correlated with the T(B) measurements to infer the effect of snow cover and ice conditions on the radiometric temperature. T(B) correlated positively with the brine volume profile in the ice at several sites, suggesting that brine volume has a strong effect on T(B) under these conditions. An overall statistical comparison of snow thickness with T(B), when compared with previously published models, suggests that the effect of snow cover on the microwave transmission coefficient of the snow/ice interface may be an important contribution to the radiometric temperature at these frequencies. A model is proposed to explain the data. |
format |
Other/Unknown Material |
author |
Lohanick, A. W. Grenfell, T. C. |
author_facet |
Lohanick, A. W. Grenfell, T. C. |
author_sort |
Lohanick, A. W. |
title |
Variations in brightness temperature over cold first-year sea ice near Tuktoyaktuk, Northwest Territories |
title_short |
Variations in brightness temperature over cold first-year sea ice near Tuktoyaktuk, Northwest Territories |
title_full |
Variations in brightness temperature over cold first-year sea ice near Tuktoyaktuk, Northwest Territories |
title_fullStr |
Variations in brightness temperature over cold first-year sea ice near Tuktoyaktuk, Northwest Territories |
title_full_unstemmed |
Variations in brightness temperature over cold first-year sea ice near Tuktoyaktuk, Northwest Territories |
title_sort |
variations in brightness temperature over cold first-year sea ice near tuktoyaktuk, northwest territories |
publishDate |
1986 |
url |
http://ntrs.nasa.gov/search.jsp?R=19860050811 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(-133.006,-133.006,69.425,69.425) |
geographic |
Northwest Territories Tuktoyaktuk |
geographic_facet |
Northwest Territories Tuktoyaktuk |
genre |
Northwest Territories Sea ice Tuktoyaktuk |
genre_facet |
Northwest Territories Sea ice Tuktoyaktuk |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19860050811 Accession ID: 86A35549 |
op_rights |
Copyright |
_version_ |
1766150464160661504 |