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Based on WRF-Chem,by changing the soil moisture,meteorological reanalysis data todrive dust emissions,we simulated the dust emissions in a dust storm process in Taklimakan Desert.Then we evaluated the uncertainties of dust emissions by both of the above factors.Just for wind field,ECWMF had a better effectiveness compared to the NECP.And wind speeds modeled by ECWMF are larger than the NECP in most areas of the desert hinterland.