Simulation and Assessment of Soil Moisture at Different Depths in China Area
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Abstract:
The weather products of FY 2 geostationary meteorological satellite are used to gain the hourly precipitation estimation data and surface incident solar radiation data. The high spatial and temporal resolution atmospheric forcing fields of surface temperature, humidity, pressure and wind speed from NCEP/NCAR reanalysis data are established to drive the CLM30 model and simulate the 10 km daily soil moisture dataset from July 2005 to June 2010 of China. Through the comparison to agro meteorological soil moisture observation data, it is found that at the depths of 0 to 10 cm and 0 to 20 cm, the CLM30 model simulation results are consistent with observations in the spatial distribution and time change rate, and at 70 to 100 cm depths, the spatial distributions are in good agreement, but the time change rate is smaller. According to the climate characteristics, China can be divided into eight regions. The analysis of the temporal variations of the regional average soil moisture indicates that the northwest and southwest regions are in good agreement, followed by the northeast and north regions.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.