Analysis of the Simulation of an Unusually Heavy Rain in Wengyuan Using the WRF Model
Using the mesoscale numerical model of WRF,this work simulated and studied an unusually heavy rain that took place in Wengyuan on May 6,2010.The results are shown as follows.The model suc-cessfully simulated the 24-h accumulated rainfall as well as the rain area and magnitude of rain intensity for the first two raining stages but failed to depict relevant elements for the third stage.The abundant amount,sustained supply and intense convergence of water vapor,a deep moist layer,a highly energized tongue at 850 hPa and a mesoscale energy front provided good conditions of water vapor and thermodynamics for the in-tense rain.On the other hand,a much weakened low-level southwesterly and a prevailing northwesterly at the mid-and high-levels in the third stage resulted in the divergence of water vapor and reduced thermody-namic conditions over Wengyuan,playing an important role in causing poor simulation for the stage.In sum-mary,the study process was characterized by vigorous growth and elevated extension of convective clouds with profiles of warm cloud layers,which can be classified as a warm-sector heavy rain mainly consisting of cumulus.
synopticsnumerical simulationunusually heavy rainWRF modelWengyuan
万方数据
维普
