Evaluation of Moderate-Resolution Imaging Spectroradiometer (MODIS) Snow Albedo Product (MCD43A) Over Tundra
This study assesses the MODIS standard Bidirectional Reflectance Distribution Function (BRDF)/Albedo product, and the daily Direct Broadcast BRDF/Albedo algorithm at tundra locations under large solar zenith angles and high anisotropic diffuse illumination and multiple scattering conditions. These p...
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Online Access: | https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/279 https://doi.org/10.1016/j.rse.2011.10.002 |
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ftmontclairstuni:oai:digitalcommons.montclair.edu:earth-environ-studies-facpubs-1278 2023-07-23T04:22:04+02:00 Evaluation of Moderate-Resolution Imaging Spectroradiometer (MODIS) Snow Albedo Product (MCD43A) Over Tundra Wang, Zhuosen Schaaf, Crystal B. Chopping, Mark Strahler, Alan H. Wang, Jindi Román, Miguel O. Rocha, Adrian V. Woodcock, Curtis E. Shuai, Yanmin 2012-02-15T08:00:00Z https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/279 https://doi.org/10.1016/j.rse.2011.10.002 unknown Montclair State University Digital Commons https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/279 doi:10.1016/j.rse.2011.10.002 Department of Earth and Environmental Studies Faculty Scholarship and Creative Works High latitude tundra MODIS standard and daily Albedo product Snow Spatial representativeness text 2012 ftmontclairstuni https://doi.org/10.1016/j.rse.2011.10.002 2023-07-03T21:48:21Z This study assesses the MODIS standard Bidirectional Reflectance Distribution Function (BRDF)/Albedo product, and the daily Direct Broadcast BRDF/Albedo algorithm at tundra locations under large solar zenith angles and high anisotropic diffuse illumination and multiple scattering conditions. These products generally agree with ground-based albedo measurements during the snow cover period when the Solar Zenith Angle (SZA) is less than 70°. An integrated validation strategy, including analysis of the representativeness of the surface heterogeneity, is performed to decide whether direct comparisons between field measurements and 500-m satellite products were appropriate or if the scaling of finer spatial resolution airborne or spaceborne data was necessary. Results indicate that the Root Mean Square Errors (RMSEs) are less than 0.047 during the snow covered periods for all MCD43 albedo products at several Alaskan tundra areas. The MCD43 1-day daily albedo product is particularly well suited to capture the rapidly changing surface conditions during the spring snow melt. Results also show that a full expression of the blue sky albedo is necessary at these large SZA snow covered areas because of the effects of anisotropic diffuse illumination and multiple scattering. In tundra locations with dark residue as a result of fire, the MODIS albedo values are lower than those at the unburned site from the start of snowmelt. Text Tundra Montclair State University Digital Commons Remote Sensing of Environment 117 264 280 |
institution |
Open Polar |
collection |
Montclair State University Digital Commons |
op_collection_id |
ftmontclairstuni |
language |
unknown |
topic |
High latitude tundra MODIS standard and daily Albedo product Snow Spatial representativeness |
spellingShingle |
High latitude tundra MODIS standard and daily Albedo product Snow Spatial representativeness Wang, Zhuosen Schaaf, Crystal B. Chopping, Mark Strahler, Alan H. Wang, Jindi Román, Miguel O. Rocha, Adrian V. Woodcock, Curtis E. Shuai, Yanmin Evaluation of Moderate-Resolution Imaging Spectroradiometer (MODIS) Snow Albedo Product (MCD43A) Over Tundra |
topic_facet |
High latitude tundra MODIS standard and daily Albedo product Snow Spatial representativeness |
description |
This study assesses the MODIS standard Bidirectional Reflectance Distribution Function (BRDF)/Albedo product, and the daily Direct Broadcast BRDF/Albedo algorithm at tundra locations under large solar zenith angles and high anisotropic diffuse illumination and multiple scattering conditions. These products generally agree with ground-based albedo measurements during the snow cover period when the Solar Zenith Angle (SZA) is less than 70°. An integrated validation strategy, including analysis of the representativeness of the surface heterogeneity, is performed to decide whether direct comparisons between field measurements and 500-m satellite products were appropriate or if the scaling of finer spatial resolution airborne or spaceborne data was necessary. Results indicate that the Root Mean Square Errors (RMSEs) are less than 0.047 during the snow covered periods for all MCD43 albedo products at several Alaskan tundra areas. The MCD43 1-day daily albedo product is particularly well suited to capture the rapidly changing surface conditions during the spring snow melt. Results also show that a full expression of the blue sky albedo is necessary at these large SZA snow covered areas because of the effects of anisotropic diffuse illumination and multiple scattering. In tundra locations with dark residue as a result of fire, the MODIS albedo values are lower than those at the unburned site from the start of snowmelt. |
format |
Text |
author |
Wang, Zhuosen Schaaf, Crystal B. Chopping, Mark Strahler, Alan H. Wang, Jindi Román, Miguel O. Rocha, Adrian V. Woodcock, Curtis E. Shuai, Yanmin |
author_facet |
Wang, Zhuosen Schaaf, Crystal B. Chopping, Mark Strahler, Alan H. Wang, Jindi Román, Miguel O. Rocha, Adrian V. Woodcock, Curtis E. Shuai, Yanmin |
author_sort |
Wang, Zhuosen |
title |
Evaluation of Moderate-Resolution Imaging Spectroradiometer (MODIS) Snow Albedo Product (MCD43A) Over Tundra |
title_short |
Evaluation of Moderate-Resolution Imaging Spectroradiometer (MODIS) Snow Albedo Product (MCD43A) Over Tundra |
title_full |
Evaluation of Moderate-Resolution Imaging Spectroradiometer (MODIS) Snow Albedo Product (MCD43A) Over Tundra |
title_fullStr |
Evaluation of Moderate-Resolution Imaging Spectroradiometer (MODIS) Snow Albedo Product (MCD43A) Over Tundra |
title_full_unstemmed |
Evaluation of Moderate-Resolution Imaging Spectroradiometer (MODIS) Snow Albedo Product (MCD43A) Over Tundra |
title_sort |
evaluation of moderate-resolution imaging spectroradiometer (modis) snow albedo product (mcd43a) over tundra |
publisher |
Montclair State University Digital Commons |
publishDate |
2012 |
url |
https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/279 https://doi.org/10.1016/j.rse.2011.10.002 |
genre |
Tundra |
genre_facet |
Tundra |
op_source |
Department of Earth and Environmental Studies Faculty Scholarship and Creative Works |
op_relation |
https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/279 doi:10.1016/j.rse.2011.10.002 |
op_doi |
https://doi.org/10.1016/j.rse.2011.10.002 |
container_title |
Remote Sensing of Environment |
container_volume |
117 |
container_start_page |
264 |
op_container_end_page |
280 |
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1772188637099720704 |