Improving the AMSR-E/NASA soil moisture data product using in-situ measurements from the Tibetan Plateau
The daily AMSR-E/NASA(the Advanced Microwave Scanning Radiometer-Earth Observing System/the National Aeronautics and Space Administration) and JAXA (the Japan Aerospace Exploration Agency) soil moisture (SM) products from 2002 to 2011 at 25 km resolution were developed and distributed by the NASA Na...
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fttudelft:oai:tudelft.nl:uuid:f0a91b92-6a41-4a88-a2da-498a46166d26 2024-04-28T08:28:32+00:00 Improving the AMSR-E/NASA soil moisture data product using in-situ measurements from the Tibetan Plateau Xie, Qiuxia (author) Menenti, M. (author) Jia, Li (author) 2019 http://resolver.tudelft.nl/uuid:f0a91b92-6a41-4a88-a2da-498a46166d26 https://doi.org/10.3390/rs11232748 en eng http://www.scopus.com/inward/record.url?scp=85076548756&partnerID=8YFLogxK Remote Sensing--2072-4292--21228f3b-c05d-4f31-8853-32966c16c27d http://resolver.tudelft.nl/uuid:f0a91b92-6a41-4a88-a2da-498a46166d26 https://doi.org/10.3390/rs11232748 © 2019 Qiuxia Xie, M. Menenti, Li Jia AMSR-E Soil moisture The microwave polarization difference index journal article 2019 fttudelft https://doi.org/10.3390/rs11232748 2024-04-09T23:57:24Z The daily AMSR-E/NASA(the Advanced Microwave Scanning Radiometer-Earth Observing System/the National Aeronautics and Space Administration) and JAXA (the Japan Aerospace Exploration Agency) soil moisture (SM) products from 2002 to 2011 at 25 km resolution were developed and distributed by the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) and JAXA archives, respectively. This study analyzed and evaluated the temporal changes and accuracy of the AMSR-E/NASA SM product and compared it with the AMSR-E/JAXA SM product. The accuracy of both AMSR-E/NASA and JAXA SM was low, with RMSE (root mean square error) > 0.1 cm 3 cm -3 against the in-situ SM measurements, especially the AMSR-E/NASA SM. Compared with the AMSR-E/JAXA SM, the dynamic range of AMSR-E/NASA SM is very narrow in many regions and does not reflect the intra- and inter-annual variability of soil moisture. We evaluated both data products by building a linear relationship between the SM and the Microwave Polarization Difference Index (MPDI) to simplify the AMSR-E/NASA SM retrieval algorithm on the basis of the observed relationship between samples extracted from the MPDI and SM data. We obtained the coe°cients of this linear relationship (i.e., A 0 and A 1 ) using in-situ measurements of SM and brightness temperature (T B ) data simulated with the same radiative transfer model applied to develop the AMSR-E/NASA SM algorithm. Finally, the linear relationships between the SM and MPDI were used to retrieve the SM monthly from AMSR-E T B data, and the estimated SM was validated using the in-situ SM measurements in the Naqu area on the Tibetan Plateau of China. We obtained a steeper slope, i.e., A 1 = 8, with the in-situ SM measurements against A 1 = 1, when using the NASA SM retrievals. The low A 1 value is a measure of the low sensitivity of the NASA SM retrievals to MPDI and its narrow dynamic range. These results were confirmed by analyzing a data set collected in Poland. In the case of the Tibetan Plateau, the higher ... Article in Journal/Newspaper National Snow and Ice Data Center Delft University of Technology: Institutional Repository Remote Sensing 11 23 2748 |
institution |
Open Polar |
collection |
Delft University of Technology: Institutional Repository |
op_collection_id |
fttudelft |
language |
English |
topic |
AMSR-E Soil moisture The microwave polarization difference index |
spellingShingle |
AMSR-E Soil moisture The microwave polarization difference index Xie, Qiuxia (author) Menenti, M. (author) Jia, Li (author) Improving the AMSR-E/NASA soil moisture data product using in-situ measurements from the Tibetan Plateau |
topic_facet |
AMSR-E Soil moisture The microwave polarization difference index |
description |
The daily AMSR-E/NASA(the Advanced Microwave Scanning Radiometer-Earth Observing System/the National Aeronautics and Space Administration) and JAXA (the Japan Aerospace Exploration Agency) soil moisture (SM) products from 2002 to 2011 at 25 km resolution were developed and distributed by the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) and JAXA archives, respectively. This study analyzed and evaluated the temporal changes and accuracy of the AMSR-E/NASA SM product and compared it with the AMSR-E/JAXA SM product. The accuracy of both AMSR-E/NASA and JAXA SM was low, with RMSE (root mean square error) > 0.1 cm 3 cm -3 against the in-situ SM measurements, especially the AMSR-E/NASA SM. Compared with the AMSR-E/JAXA SM, the dynamic range of AMSR-E/NASA SM is very narrow in many regions and does not reflect the intra- and inter-annual variability of soil moisture. We evaluated both data products by building a linear relationship between the SM and the Microwave Polarization Difference Index (MPDI) to simplify the AMSR-E/NASA SM retrieval algorithm on the basis of the observed relationship between samples extracted from the MPDI and SM data. We obtained the coe°cients of this linear relationship (i.e., A 0 and A 1 ) using in-situ measurements of SM and brightness temperature (T B ) data simulated with the same radiative transfer model applied to develop the AMSR-E/NASA SM algorithm. Finally, the linear relationships between the SM and MPDI were used to retrieve the SM monthly from AMSR-E T B data, and the estimated SM was validated using the in-situ SM measurements in the Naqu area on the Tibetan Plateau of China. We obtained a steeper slope, i.e., A 1 = 8, with the in-situ SM measurements against A 1 = 1, when using the NASA SM retrievals. The low A 1 value is a measure of the low sensitivity of the NASA SM retrievals to MPDI and its narrow dynamic range. These results were confirmed by analyzing a data set collected in Poland. In the case of the Tibetan Plateau, the higher ... |
format |
Article in Journal/Newspaper |
author |
Xie, Qiuxia (author) Menenti, M. (author) Jia, Li (author) |
author_facet |
Xie, Qiuxia (author) Menenti, M. (author) Jia, Li (author) |
author_sort |
Xie, Qiuxia (author) |
title |
Improving the AMSR-E/NASA soil moisture data product using in-situ measurements from the Tibetan Plateau |
title_short |
Improving the AMSR-E/NASA soil moisture data product using in-situ measurements from the Tibetan Plateau |
title_full |
Improving the AMSR-E/NASA soil moisture data product using in-situ measurements from the Tibetan Plateau |
title_fullStr |
Improving the AMSR-E/NASA soil moisture data product using in-situ measurements from the Tibetan Plateau |
title_full_unstemmed |
Improving the AMSR-E/NASA soil moisture data product using in-situ measurements from the Tibetan Plateau |
title_sort |
improving the amsr-e/nasa soil moisture data product using in-situ measurements from the tibetan plateau |
publishDate |
2019 |
url |
http://resolver.tudelft.nl/uuid:f0a91b92-6a41-4a88-a2da-498a46166d26 https://doi.org/10.3390/rs11232748 |
genre |
National Snow and Ice Data Center |
genre_facet |
National Snow and Ice Data Center |
op_relation |
http://www.scopus.com/inward/record.url?scp=85076548756&partnerID=8YFLogxK Remote Sensing--2072-4292--21228f3b-c05d-4f31-8853-32966c16c27d http://resolver.tudelft.nl/uuid:f0a91b92-6a41-4a88-a2da-498a46166d26 https://doi.org/10.3390/rs11232748 |
op_rights |
© 2019 Qiuxia Xie, M. Menenti, Li Jia |
op_doi |
https://doi.org/10.3390/rs11232748 |
container_title |
Remote Sensing |
container_volume |
11 |
container_issue |
23 |
container_start_page |
2748 |
_version_ |
1797587025266737152 |