Estimating fractional snow cover from passive microwave brightness temperature data using MODIS snow cover product over North America
The dynamic characteristics of seasonal snow cover are critical for hydrology management, the climate system, and the ecosystem functions. Optical satellite remote sensing has proven to be an effective tool for monitoring global and regional variations in snow cover. However, accurately capturing th...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:2ea204a380d3414b8a4a7150fb6f5dca 2023-05-15T18:32:19+02:00 Estimating fractional snow cover from passive microwave brightness temperature data using MODIS snow cover product over North America X. Xiao S. Liang T. He D. Wu C. Pei J. Gong 2021-02-01 https://doi.org/10.5194/tc-15-835-2021 https://tc.copernicus.org/articles/15/835/2021/tc-15-835-2021.pdf https://doaj.org/article/2ea204a380d3414b8a4a7150fb6f5dca en eng Copernicus Publications doi:10.5194/tc-15-835-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/835/2021/tc-15-835-2021.pdf https://doaj.org/article/2ea204a380d3414b8a4a7150fb6f5dca undefined The Cryosphere, Vol 15, Pp 835-861 (2021) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.5194/tc-15-835-2021 2023-01-22T19:22:55Z The dynamic characteristics of seasonal snow cover are critical for hydrology management, the climate system, and the ecosystem functions. Optical satellite remote sensing has proven to be an effective tool for monitoring global and regional variations in snow cover. However, accurately capturing the characteristics of snow dynamics at a finer spatiotemporal resolution continues to be problematic as observations from optical satellite sensors are greatly impacted by clouds and solar illumination. Traditional methods of mapping snow cover from passive microwave data only provide binary information at a spatial resolution of 25 km. This innovative study applies the random forest regression technique to enhanced-resolution passive microwave brightness temperature data (6.25 km) to estimate fractional snow cover over North America in winter months (January and February). Many influential factors, including land cover, topography, and location information, were incorporated into the retrieval models. Moderate Resolution Imaging Spectroradiometer (MODIS) snow cover products between 2008 and 2017 were used to create the reference fractional snow cover data as the “true” observations in this study. Although overestimating and underestimating around two extreme values of fractional snow cover, the proposed retrieval algorithm outperformed the other three approaches (linear regression, artificial neural networks, and multivariate adaptive regression splines) using independent test data for all land cover classes with higher accuracy and no out-of-range estimated values. The method enabled the evaluation of the estimated fractional snow cover using independent datasets, in which the root mean square error of evaluation results ranged from 0.189 to 0.221. The snow cover detection capability of the proposed algorithm was validated using meteorological station observations with more than 310 000 records. We found that binary snow cover obtained from the estimated fractional snow cover was in good agreement with ground ... Article in Journal/Newspaper The Cryosphere Unknown The Cryosphere 15 2 835 861 |
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geo envir X. Xiao S. Liang T. He D. Wu C. Pei J. Gong Estimating fractional snow cover from passive microwave brightness temperature data using MODIS snow cover product over North America |
topic_facet |
geo envir |
description |
The dynamic characteristics of seasonal snow cover are critical for hydrology management, the climate system, and the ecosystem functions. Optical satellite remote sensing has proven to be an effective tool for monitoring global and regional variations in snow cover. However, accurately capturing the characteristics of snow dynamics at a finer spatiotemporal resolution continues to be problematic as observations from optical satellite sensors are greatly impacted by clouds and solar illumination. Traditional methods of mapping snow cover from passive microwave data only provide binary information at a spatial resolution of 25 km. This innovative study applies the random forest regression technique to enhanced-resolution passive microwave brightness temperature data (6.25 km) to estimate fractional snow cover over North America in winter months (January and February). Many influential factors, including land cover, topography, and location information, were incorporated into the retrieval models. Moderate Resolution Imaging Spectroradiometer (MODIS) snow cover products between 2008 and 2017 were used to create the reference fractional snow cover data as the “true” observations in this study. Although overestimating and underestimating around two extreme values of fractional snow cover, the proposed retrieval algorithm outperformed the other three approaches (linear regression, artificial neural networks, and multivariate adaptive regression splines) using independent test data for all land cover classes with higher accuracy and no out-of-range estimated values. The method enabled the evaluation of the estimated fractional snow cover using independent datasets, in which the root mean square error of evaluation results ranged from 0.189 to 0.221. The snow cover detection capability of the proposed algorithm was validated using meteorological station observations with more than 310 000 records. We found that binary snow cover obtained from the estimated fractional snow cover was in good agreement with ground ... |
format |
Article in Journal/Newspaper |
author |
X. Xiao S. Liang T. He D. Wu C. Pei J. Gong |
author_facet |
X. Xiao S. Liang T. He D. Wu C. Pei J. Gong |
author_sort |
X. Xiao |
title |
Estimating fractional snow cover from passive microwave brightness temperature data using MODIS snow cover product over North America |
title_short |
Estimating fractional snow cover from passive microwave brightness temperature data using MODIS snow cover product over North America |
title_full |
Estimating fractional snow cover from passive microwave brightness temperature data using MODIS snow cover product over North America |
title_fullStr |
Estimating fractional snow cover from passive microwave brightness temperature data using MODIS snow cover product over North America |
title_full_unstemmed |
Estimating fractional snow cover from passive microwave brightness temperature data using MODIS snow cover product over North America |
title_sort |
estimating fractional snow cover from passive microwave brightness temperature data using modis snow cover product over north america |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-835-2021 https://tc.copernicus.org/articles/15/835/2021/tc-15-835-2021.pdf https://doaj.org/article/2ea204a380d3414b8a4a7150fb6f5dca |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
The Cryosphere, Vol 15, Pp 835-861 (2021) |
op_relation |
doi:10.5194/tc-15-835-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/835/2021/tc-15-835-2021.pdf https://doaj.org/article/2ea204a380d3414b8a4a7150fb6f5dca |
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op_doi |
https://doi.org/10.5194/tc-15-835-2021 |
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The Cryosphere |
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15 |
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2 |
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835 |
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861 |
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