Abstract:

In order to analyze the local affect of typhoon rainstorm, the author simulated the rainstorms caused by 0601 typhoon ‘Chanchu’ in Chaozhou of Guangdong with WRF model, and the simulated results which had been diagnosed and analyzed by using the method of Q vectors. The simulated results showed that low level convergence and transportation of moisture were critical to typhoon rainstorm during typhoon ‘Chanchu’. The author diagnosed the outputs of WRF model by using Q vectors, the results showed that the raining areas coexisted with Q vectors convergence along its moving direction. At the same time, the big values areas of Q vectors divergence were corresponded by large rain distribution. The vertical distribution of Q vectors divergence could be estimated the frontgenesis and frontolysis. This two physics factors could be used to forecast the decay and disappear of typhoon.