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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2011
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00026683 2023-05-15T18:32:32+02:00 Retrieval of snow grain size and albedo of western Himalayan snow cover using satellite data Negi, H. S. Kokhanovsky, A. 2011-10 electronic https://doi.org/10.5194/tc-5-831-2011 https://noa.gwlb.de/receive/cop_mods_00026683 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00026638/tc-5-831-2011.pdf https://tc.copernicus.org/articles/5/831/2011/tc-5-831-2011.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-5-831-2011 https://noa.gwlb.de/receive/cop_mods_00026683 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00026638/tc-5-831-2011.pdf https://tc.copernicus.org/articles/5/831/2011/tc-5-831-2011.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2011 ftnonlinearchiv https://doi.org/10.5194/tc-5-831-2011 2022-02-08T22:49:07Z 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 Niedersächsisches Online-Archiv NOA Hyperion ENVELOPE(-68.917,-68.917,-72.033,-72.033) The Cryosphere 5 4 831 847 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Negi, H. S. Kokhanovsky, A. Retrieval of snow grain size and albedo of western Himalayan snow cover using satellite data |
topic_facet |
article Verlagsveröffentlichung |
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 |
Negi, H. S. Kokhanovsky, A. |
author_facet |
Negi, H. S. Kokhanovsky, A. |
author_sort |
Negi, H. S. |
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 https://noa.gwlb.de/receive/cop_mods_00026683 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00026638/tc-5-831-2011.pdf https://tc.copernicus.org/articles/5/831/2011/tc-5-831-2011.pdf |
long_lat |
ENVELOPE(-68.917,-68.917,-72.033,-72.033) |
geographic |
Hyperion |
geographic_facet |
Hyperion |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-5-831-2011 https://noa.gwlb.de/receive/cop_mods_00026683 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00026638/tc-5-831-2011.pdf https://tc.copernicus.org/articles/5/831/2011/tc-5-831-2011.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-5-831-2011 |
container_title |
The Cryosphere |
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5 |
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4 |
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831 |
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847 |
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