Application Of Cloud Motion Wind Data Of FY-2C And Its Impact On Prediction Of Typhoon Cases

In this paper, the control and two assimilation experiments of WRF regional mesoscale mod-el prediction are verified in the typhoon Haitang(0505).Based on the WRF-3DVAR system, the FY-2C infrared and water vapor cloud motion winds are assimilated into WRF model. The as-similation data of One assimilation test is the cloud motion winds before quality control and the other is cloud motion winds after quality control. The effect of the cloud motion winds on the prediction of rain and wind field are analyzed through compareing the three tests. Results show that the assimilation of the quality-controled cloud motion winds into the initial fields have positive impact on prediction of the area and intensity of rain,also indicate that the different grades of Ts score are improved by far than the other tests.The assimilation make improvement on the forecast of wind.Taking the same approach as Haitang to simulate other two typhoon cases and giving the Ts scores of the forecast rainfall. From the results of two typhoon cases similar conclusions can be obtainedand.Therefore, assimilating cloud motion winds with reasonable control and selection can well improve the descriptive possibility of wind field in WRF model,supply the mesoscale in-formation in initialization field to improve the simulation result of precipitation and wind field and have positive impact on the forecasting ability of WRF model finally.