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《Acta Scientiarum Naturalium Universitatis Pekinensis》 2011-05
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Estimation of the Soil Moisture Using FY-3A/MWRI Data over Semiarid Areas

PENG Lichun1,2,LI Wanbiao1,2,,LIU Huizhi2 1.Department of Atmospheric and Oceanic Sciences,School of Physics,Peking University,Beijing 100871;2.LAPC,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029  
In order to monitor the range and extent of drought and resolve the serious problems of the semi-arid regions,a soil moisture retrieval method by satellite microwave remote sensing is proposed.The relation of microwave brightness temperature and surface soil moisture was simulated by surface and atmosphere microwave radiative transfer models.The soil moisture retrieval algorithm in the logarithm-cubic form was established.By using the data of the microwave radiation imager aboard the FY-3A polar orbiting meteorological satellite and the retrieval algorithm,the soil moisture was derived for the farmland and the grassland in Tongyu of Jilin.The result shows that the retrieval soil moisture is in good agreement with the ground-based observations.The root mean square error is 0.003 cm3/cm3 for the farmland,and 0.005 cm3/cm3 for grassland.The method can be applied to the future FY-3B satellite that is possible to derive more information.With the improved radiation transfer model in the future,the radiation characteristics of the various grounds will be obtained.The regional moisture study will be carried on in the future.
【Fund】: 大气边界层物理和大气化学国家重点实验室(LAPC-KF-2008-01)资助
【CateGory Index】: S152.7;TP79
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