Estimating Snow Mass in North America Through Assimilation of Advanced Microwave Scanning Radiometer Brightness Temperature Observations Using the Catchment Land Surface Model and Support Vector Machines
To estimate snow mass across North America, multi-frequency brightness temperature (Tb) observations collected by the Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) from 2002 to 2011 were assimilated into the Catchment land surface model using a support vector machine (SVM)...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20180006543 2023-05-15T18:40:30+02:00 Estimating Snow Mass in North America Through Assimilation of Advanced Microwave Scanning Radiometer Brightness Temperature Observations Using the Catchment Land Surface Model and Support Vector Machines Reichle, Rolf H. Xue, Yuan Forman, Barton A. Unclassified, Unlimited, Publicly available July 23, 2018 application/pdf http://hdl.handle.net/2060/20180006543 unknown Document ID: 20180006543 http://hdl.handle.net/2060/20180006543 Copyright, Use by or on behalf of the U.S. Government permitted CASI Earth Resources and Remote Sensing GSFC-E-DAA-TN58904 Water Resources Research (ISSN 0043-1397) (e-ISSN 1944-7973); 54; 9; 6488-6509 2018 ftnasantrs 2020-02-01T23:47:37Z To estimate snow mass across North America, multi-frequency brightness temperature (Tb) observations collected by the Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) from 2002 to 2011 were assimilated into the Catchment land surface model using a support vector machine (SVM) as the observation operator as part of a one-dimensional ensemble Kalman filter. The performance of the assimilation system is evaluated through comparisons against ground-based measurements and state-of-the-art SWE and snow depth products. Assimilation estimates agree better with ground-based snow depth measurements than model-only ("open loop", or OL) estimates in approximately 82% (56 out of 62) of pixels that are colocated with at least two ground-based stations. In addition, assimilation estimates tend to agree better with all snow products over tundra snow, alpine snow, maritime snow, as well as sparsely-vegetated snow covered pixels. Improvements in snow mass via assimilation translate into improvements in cumulative runoff estimates when compared against discharge measurements in 11 out of 13 major snow-dominated basins in Alaska. These results prove that a SVM can serve as an efficient and effective observation operator for snow mass estimation within a radiance assimilation system, but a better observational baseline is required to document a statistically significant improvement. Other/Unknown Material Tundra Alaska NASA Technical Reports Server (NTRS) |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
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topic |
Earth Resources and Remote Sensing |
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Earth Resources and Remote Sensing Reichle, Rolf H. Xue, Yuan Forman, Barton A. Estimating Snow Mass in North America Through Assimilation of Advanced Microwave Scanning Radiometer Brightness Temperature Observations Using the Catchment Land Surface Model and Support Vector Machines |
topic_facet |
Earth Resources and Remote Sensing |
description |
To estimate snow mass across North America, multi-frequency brightness temperature (Tb) observations collected by the Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) from 2002 to 2011 were assimilated into the Catchment land surface model using a support vector machine (SVM) as the observation operator as part of a one-dimensional ensemble Kalman filter. The performance of the assimilation system is evaluated through comparisons against ground-based measurements and state-of-the-art SWE and snow depth products. Assimilation estimates agree better with ground-based snow depth measurements than model-only ("open loop", or OL) estimates in approximately 82% (56 out of 62) of pixels that are colocated with at least two ground-based stations. In addition, assimilation estimates tend to agree better with all snow products over tundra snow, alpine snow, maritime snow, as well as sparsely-vegetated snow covered pixels. Improvements in snow mass via assimilation translate into improvements in cumulative runoff estimates when compared against discharge measurements in 11 out of 13 major snow-dominated basins in Alaska. These results prove that a SVM can serve as an efficient and effective observation operator for snow mass estimation within a radiance assimilation system, but a better observational baseline is required to document a statistically significant improvement. |
format |
Other/Unknown Material |
author |
Reichle, Rolf H. Xue, Yuan Forman, Barton A. |
author_facet |
Reichle, Rolf H. Xue, Yuan Forman, Barton A. |
author_sort |
Reichle, Rolf H. |
title |
Estimating Snow Mass in North America Through Assimilation of Advanced Microwave Scanning Radiometer Brightness Temperature Observations Using the Catchment Land Surface Model and Support Vector Machines |
title_short |
Estimating Snow Mass in North America Through Assimilation of Advanced Microwave Scanning Radiometer Brightness Temperature Observations Using the Catchment Land Surface Model and Support Vector Machines |
title_full |
Estimating Snow Mass in North America Through Assimilation of Advanced Microwave Scanning Radiometer Brightness Temperature Observations Using the Catchment Land Surface Model and Support Vector Machines |
title_fullStr |
Estimating Snow Mass in North America Through Assimilation of Advanced Microwave Scanning Radiometer Brightness Temperature Observations Using the Catchment Land Surface Model and Support Vector Machines |
title_full_unstemmed |
Estimating Snow Mass in North America Through Assimilation of Advanced Microwave Scanning Radiometer Brightness Temperature Observations Using the Catchment Land Surface Model and Support Vector Machines |
title_sort |
estimating snow mass in north america through assimilation of advanced microwave scanning radiometer brightness temperature observations using the catchment land surface model and support vector machines |
publishDate |
2018 |
url |
http://hdl.handle.net/2060/20180006543 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Tundra Alaska |
genre_facet |
Tundra Alaska |
op_source |
CASI |
op_relation |
Document ID: 20180006543 http://hdl.handle.net/2060/20180006543 |
op_rights |
Copyright, Use by or on behalf of the U.S. Government permitted |
_version_ |
1766229865577578496 |