W.: New methods to infer snow albedo from the MISR instrument with applications to the Greenland ice sheet
Abstract-Snow-covered surfaces have a very high surface albedo, thereby allowing little energy to be absorbed by the snowpack. As the snowpack ages and/or begins to melt, the snow albedo decreases and more solar energy is absorbed by the snowpack. Therefore, accurate estimation of snow albedo is ess...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1060.3347 2023-05-15T16:26:16+02:00 W.: New methods to infer snow albedo from the MISR instrument with applications to the Greenland ice sheet Julienne C Stroeve Anne W Nolin The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1060.3347 http://www.geo.oregonstate.edu/%7Enolina/RESEARCH_GROUP/Stroeve_Nolin_IEEE_2002.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1060.3347 http://www.geo.oregonstate.edu/%7Enolina/RESEARCH_GROUP/Stroeve_Nolin_IEEE_2002.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.geo.oregonstate.edu/%7Enolina/RESEARCH_GROUP/Stroeve_Nolin_IEEE_2002.pdf text ftciteseerx 2020-04-19T00:17:44Z Abstract-Snow-covered surfaces have a very high surface albedo, thereby allowing little energy to be absorbed by the snowpack. As the snowpack ages and/or begins to melt, the snow albedo decreases and more solar energy is absorbed by the snowpack. Therefore, accurate estimation of snow albedo is essential for monitoring the state of the cryosphere. This paper examines the retrieval of snow albedo using data from the Multi-angle Imaging SpectroRadiometer (MISR) instrument over the Greenland ice sheet. Two different methods are developed and examined to derive the snow albedo: one based on the spectral information from MISR and one utilizing the angular information from the MISR instrument. The latter method is based on a statistical relationship between in situ albedo measurements and the MISR red channel reflectance at all MISR viewing angles and is found to give good agreement with the ground-based measurements. Good agreement is also found using the spectral information, although the method is more sensitive to instrument calibration, snow bidirectional reflectance distribution function (BRDF) models, and narrowband-to-broadband relationships. In general, using either method retrieves snow surface albedo values that are within about 6% of that measured at the stations in Greenland. Index Terms-Greenland, Multi-angle Imaging SpectroRadiometer (MISR), snow albedo. Text Greenland Ice Sheet Unknown Greenland |
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English |
description |
Abstract-Snow-covered surfaces have a very high surface albedo, thereby allowing little energy to be absorbed by the snowpack. As the snowpack ages and/or begins to melt, the snow albedo decreases and more solar energy is absorbed by the snowpack. Therefore, accurate estimation of snow albedo is essential for monitoring the state of the cryosphere. This paper examines the retrieval of snow albedo using data from the Multi-angle Imaging SpectroRadiometer (MISR) instrument over the Greenland ice sheet. Two different methods are developed and examined to derive the snow albedo: one based on the spectral information from MISR and one utilizing the angular information from the MISR instrument. The latter method is based on a statistical relationship between in situ albedo measurements and the MISR red channel reflectance at all MISR viewing angles and is found to give good agreement with the ground-based measurements. Good agreement is also found using the spectral information, although the method is more sensitive to instrument calibration, snow bidirectional reflectance distribution function (BRDF) models, and narrowband-to-broadband relationships. In general, using either method retrieves snow surface albedo values that are within about 6% of that measured at the stations in Greenland. Index Terms-Greenland, Multi-angle Imaging SpectroRadiometer (MISR), snow albedo. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Julienne C Stroeve Anne W Nolin |
spellingShingle |
Julienne C Stroeve Anne W Nolin W.: New methods to infer snow albedo from the MISR instrument with applications to the Greenland ice sheet |
author_facet |
Julienne C Stroeve Anne W Nolin |
author_sort |
Julienne C Stroeve |
title |
W.: New methods to infer snow albedo from the MISR instrument with applications to the Greenland ice sheet |
title_short |
W.: New methods to infer snow albedo from the MISR instrument with applications to the Greenland ice sheet |
title_full |
W.: New methods to infer snow albedo from the MISR instrument with applications to the Greenland ice sheet |
title_fullStr |
W.: New methods to infer snow albedo from the MISR instrument with applications to the Greenland ice sheet |
title_full_unstemmed |
W.: New methods to infer snow albedo from the MISR instrument with applications to the Greenland ice sheet |
title_sort |
w.: new methods to infer snow albedo from the misr instrument with applications to the greenland ice sheet |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1060.3347 http://www.geo.oregonstate.edu/%7Enolina/RESEARCH_GROUP/Stroeve_Nolin_IEEE_2002.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
http://www.geo.oregonstate.edu/%7Enolina/RESEARCH_GROUP/Stroeve_Nolin_IEEE_2002.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1060.3347 http://www.geo.oregonstate.edu/%7Enolina/RESEARCH_GROUP/Stroeve_Nolin_IEEE_2002.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766015167439568896 |