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Open AccessArticle

Blending Satellite Observed, Model Simulated, and in Situ Measured Soil Moisture over Tibetan Plateau

1
Faculty of Geo-Information Science and Earth Observation, University of Twente, Hengelosestraat 99, Enschede 7514 AE, The Netherlands
2
Institute of Hydrology and Water Resources, Department of Hydraulic Engineering, Tsinghua University, Xinshui Building Room 336, Qing Hua Yuan No.1, Haidian District, Beijing 100084, China
3
Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
*
Author to whom correspondence should be addressed.
Academic Editors: Zoltan Vekerdy, Magaly Koch and Prasad S. Thenkabail
Remote Sens. 2016, 8(3), 268; https://doi.org/10.3390/rs8030268
Received: 5 December 2015 / Revised: 29 February 2016 / Accepted: 16 March 2016 / Published: 22 March 2016
The inter-comparison of different soil moisture (SM) products over the Tibetan Plateau (TP) reveals the inconsistency among different SM products, when compared to in situ measurement. It highlights the need to constrain the model simulated SM with the in situ measured data climatology. In this study, the in situ soil moisture networks, combined with the classification of climate zones over the TP, were used to produce the in situ measured SM climatology at the plateau scale. The generated TP scale in situ SM climatology was then used to scale the model-simulated SM data, which was subsequently used to scale the SM satellite observations. The climatology-scaled satellite and model-simulated SM were then blended objectively, by applying the triple collocation and least squares method. The final blended SM can replicate the SM dynamics across different climatic zones, from sub-humid regions to semi-arid and arid regions over the TP. This demonstrates the need to constrain the model-simulated SM estimates with the in situ measurements before their further applications in scaling climatology of SM satellite products. View Full-Text
Keywords: Tibetan Plateau; soil moisture; climatic zones; Tibet-Obs; triple collocation; AMSRE; ASCAT; ERA-Interim Tibetan Plateau; soil moisture; climatic zones; Tibet-Obs; triple collocation; AMSRE; ASCAT; ERA-Interim
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MDPI and ACS Style

Zeng, Y.; Su, Z.; Van der Velde, R.; Wang, L.; Xu, K.; Wang, X.; Wen, J. Blending Satellite Observed, Model Simulated, and in Situ Measured Soil Moisture over Tibetan Plateau. Remote Sens. 2016, 8, 268.

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