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| Spatial Variability of Surface Soil Moisture at a Regional Scale in the Loess Plateau Based on SMOS |
| Li Xiaoying, Duan Zhenghu |
| Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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Abstract SMOS soil moisture data, MODIS vegetation index data and TRMM monthly precipitation data of the Loess Plateau were collected to study the spatial and temporal variability of surface soil moisture and its response to rainfall at a regional scale. The results show that the spatial distribution of surface soil moisture was low in west and northeast,while high in the southeast. The surface soil moisture in Qinghai rocky mountain area and the southwest in Shanxi province were different from the whole area. The surface soil moisture in the western of the Loess Plateau and the part of Hetao Plain had greater seasonal changes. Under different rainfall conditions, the correlation between surface soil moisture and precipitation posed a significant difference.
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Received: 09 November 2012
Published: 20 January 2014
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2014, Vol. 34 
