Retrieval of snow grain size and albedo of western Himalayan snow cover using satellite data
In the present study we describe the retrievals of snow grain size and spectral albedo (plane and spherical albedo) for western Himalayan snow cover using Hyperion sensor data. The asymptotic radiative transfer (ART) theory was explored for the snow retrievals. To make the methodology operational on...
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Copernicus Publications
2011
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Online Access: | https://doi.org/10.5194/tc-5-831-2011 http://www.the-cryosphere.net/5/831/2011/tc-5-831-2011.pdf https://doaj.org/article/d1c913bd9c3c4343a2e8fb58838bc615 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:d1c913bd9c3c4343a2e8fb58838bc615 2023-05-15T18:32:21+02:00 Retrieval of snow grain size and albedo of western Himalayan snow cover using satellite data H. S. Negi A. Kokhanovsky 2011-10-01 https://doi.org/10.5194/tc-5-831-2011 http://www.the-cryosphere.net/5/831/2011/tc-5-831-2011.pdf https://doaj.org/article/d1c913bd9c3c4343a2e8fb58838bc615 en eng Copernicus Publications doi:10.5194/tc-5-831-2011 1994-0416 1994-0424 http://www.the-cryosphere.net/5/831/2011/tc-5-831-2011.pdf https://doaj.org/article/d1c913bd9c3c4343a2e8fb58838bc615 undefined The Cryosphere, Vol 5, Iss 4, Pp 831-847 (2011) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2011 fttriple https://doi.org/10.5194/tc-5-831-2011 2023-01-22T19:19:14Z In the present study we describe the retrievals of snow grain size and spectral albedo (plane and spherical albedo) for western Himalayan snow cover using Hyperion sensor data. The asymptotic radiative transfer (ART) theory was explored for the snow retrievals. To make the methodology operational only five spectral bands (440, 500, 1050, 1240 and 1650 nm) of Hyperion were used for snow parameters retrieval. The bi-spectral method (440 nm in the visible and 1050/1240 nm in the NIR region) was used to retrieve snow grain size. Spectral albedos were retrieved using satellite reflectances and estimated grain size. A good agreement was observed between retrieved snow parameters and ground observed snow-meteorological conditions. The satellite retrieved grain sizes were compared with field spectroradiometer retrieved grain sizes and close results were found for lower Himalayan snow. The wavelength 1240 nm was found to be more suitable compared to 1050 nm for grain size retrieval along the steep slopes. The methodology was able to retrieve the spatial variations in snow parameters in different parts of western Himalaya which are due to snow climatic and terrain conditions of Himalaya. This methodology is of importance for operational snow cover and glacier monitoring in Himalayan region using space-borne and air-borne sensors. Article in Journal/Newspaper The Cryosphere Unknown Hyperion ENVELOPE(-68.917,-68.917,-72.033,-72.033) The Cryosphere 5 4 831 847 |
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English |
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geo envir H. S. Negi A. Kokhanovsky Retrieval of snow grain size and albedo of western Himalayan snow cover using satellite data |
topic_facet |
geo envir |
description |
In the present study we describe the retrievals of snow grain size and spectral albedo (plane and spherical albedo) for western Himalayan snow cover using Hyperion sensor data. The asymptotic radiative transfer (ART) theory was explored for the snow retrievals. To make the methodology operational only five spectral bands (440, 500, 1050, 1240 and 1650 nm) of Hyperion were used for snow parameters retrieval. The bi-spectral method (440 nm in the visible and 1050/1240 nm in the NIR region) was used to retrieve snow grain size. Spectral albedos were retrieved using satellite reflectances and estimated grain size. A good agreement was observed between retrieved snow parameters and ground observed snow-meteorological conditions. The satellite retrieved grain sizes were compared with field spectroradiometer retrieved grain sizes and close results were found for lower Himalayan snow. The wavelength 1240 nm was found to be more suitable compared to 1050 nm for grain size retrieval along the steep slopes. The methodology was able to retrieve the spatial variations in snow parameters in different parts of western Himalaya which are due to snow climatic and terrain conditions of Himalaya. This methodology is of importance for operational snow cover and glacier monitoring in Himalayan region using space-borne and air-borne sensors. |
format |
Article in Journal/Newspaper |
author |
H. S. Negi A. Kokhanovsky |
author_facet |
H. S. Negi A. Kokhanovsky |
author_sort |
H. S. Negi |
title |
Retrieval of snow grain size and albedo of western Himalayan snow cover using satellite data |
title_short |
Retrieval of snow grain size and albedo of western Himalayan snow cover using satellite data |
title_full |
Retrieval of snow grain size and albedo of western Himalayan snow cover using satellite data |
title_fullStr |
Retrieval of snow grain size and albedo of western Himalayan snow cover using satellite data |
title_full_unstemmed |
Retrieval of snow grain size and albedo of western Himalayan snow cover using satellite data |
title_sort |
retrieval of snow grain size and albedo of western himalayan snow cover using satellite data |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/tc-5-831-2011 http://www.the-cryosphere.net/5/831/2011/tc-5-831-2011.pdf https://doaj.org/article/d1c913bd9c3c4343a2e8fb58838bc615 |
long_lat |
ENVELOPE(-68.917,-68.917,-72.033,-72.033) |
geographic |
Hyperion |
geographic_facet |
Hyperion |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
The Cryosphere, Vol 5, Iss 4, Pp 831-847 (2011) |
op_relation |
doi:10.5194/tc-5-831-2011 1994-0416 1994-0424 http://www.the-cryosphere.net/5/831/2011/tc-5-831-2011.pdf https://doaj.org/article/d1c913bd9c3c4343a2e8fb58838bc615 |
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undefined |
op_doi |
https://doi.org/10.5194/tc-5-831-2011 |
container_title |
The Cryosphere |
container_volume |
5 |
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4 |
container_start_page |
831 |
op_container_end_page |
847 |
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1766216450977038336 |