Reduction of weather effects in the calculation of sea ice concentration from microwave radiances
A technique is presented which improves existing methods of calculating sea ice concentrations from microwave radiances by reducing weather-related effects over open ocean areas and in the vicinity of marginal sea ice zones. Winds, atmospheric water vapor, cloud liquid water, and rain increase the m...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19860048366 2023-05-15T18:16:21+02:00 Reduction of weather effects in the calculation of sea ice concentration from microwave radiances Gloersen, P. Cavalier, D. J. Unclassified, Unlimited, Publicly available Mar 15, 1986 http://ntrs.nasa.gov/search.jsp?R=19860048366 unknown http://ntrs.nasa.gov/search.jsp?R=19860048366 Accession ID: 86A33104 Copyright Other Sources 48 Journal of Geophysical Research; 91; 3913-391 1986 ftnasantrs 2012-02-15T16:46:38Z A technique is presented which improves existing methods of calculating sea ice concentrations from microwave radiances by reducing weather-related effects over open ocean areas and in the vicinity of marginal sea ice zones. Winds, atmospheric water vapor, cloud liquid water, and rain increase the microwave emission over these regions and thus result in erroneous values of computed sea ice concentration. The method described is based on the microwave spectral properties of sea ice and ice-free ocean and utilizes ratios of the polarized radiances at the 0.81-cm (37 GHz) and 1.7-cm (18 GHz) wavelengths. Following a discussion of the physical basis for this technique, examples are provided which demonstrate its utility. While the technique was developed for use with the Nimbus 7 scanning multichannel microwave radiometer data, it is applicable also to data from other microwave radiometers operating in a similar wavelength range. Other/Unknown Material Sea ice NASA Technical Reports Server (NTRS) |
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NASA Technical Reports Server (NTRS) |
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48 |
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48 Gloersen, P. Cavalier, D. J. Reduction of weather effects in the calculation of sea ice concentration from microwave radiances |
topic_facet |
48 |
description |
A technique is presented which improves existing methods of calculating sea ice concentrations from microwave radiances by reducing weather-related effects over open ocean areas and in the vicinity of marginal sea ice zones. Winds, atmospheric water vapor, cloud liquid water, and rain increase the microwave emission over these regions and thus result in erroneous values of computed sea ice concentration. The method described is based on the microwave spectral properties of sea ice and ice-free ocean and utilizes ratios of the polarized radiances at the 0.81-cm (37 GHz) and 1.7-cm (18 GHz) wavelengths. Following a discussion of the physical basis for this technique, examples are provided which demonstrate its utility. While the technique was developed for use with the Nimbus 7 scanning multichannel microwave radiometer data, it is applicable also to data from other microwave radiometers operating in a similar wavelength range. |
format |
Other/Unknown Material |
author |
Gloersen, P. Cavalier, D. J. |
author_facet |
Gloersen, P. Cavalier, D. J. |
author_sort |
Gloersen, P. |
title |
Reduction of weather effects in the calculation of sea ice concentration from microwave radiances |
title_short |
Reduction of weather effects in the calculation of sea ice concentration from microwave radiances |
title_full |
Reduction of weather effects in the calculation of sea ice concentration from microwave radiances |
title_fullStr |
Reduction of weather effects in the calculation of sea ice concentration from microwave radiances |
title_full_unstemmed |
Reduction of weather effects in the calculation of sea ice concentration from microwave radiances |
title_sort |
reduction of weather effects in the calculation of sea ice concentration from microwave radiances |
publishDate |
1986 |
url |
http://ntrs.nasa.gov/search.jsp?R=19860048366 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19860048366 Accession ID: 86A33104 |
op_rights |
Copyright |
_version_ |
1766189915633090560 |