Zhu J.,Hainan Climate Center |
Zhu J.,Key Laboratory of Meteorological Disaster Prevention and Reduction of South China Sea |
Zhang J.,Hainan Climate Center |
Zhang J.,Key Laboratory of Meteorological Disaster Prevention and Reduction of South China Sea |
And 5 more authors.
Journal of Natural Disasters | Year: 2014
Rainstorm is one of the major weather disasters of the new satellite launch center in Wenchang City of Hainan Province, which will cause unpredictable disasters in test task of the site. Using the daily precipitation data of Wenchang meteorological station and global reanalysis gridded data of NCEP/NCAR from 1970 to 2010 and based on seven weather systems (cold procsee from east, cold procsee from west, subtropical high, warm ridge of high pressure, South China Sea trough, southwest trough, Vietnam trough) , this paper statistically analyzed the climatic characteristics and the conceptual cause model of the non-typhoon rainstorm weather process in Wenchang region of Hainan Province during recent 41 years under influence of each kind of weather system. Results show that, the annual frequency of the non-typhoon rainstorm in the launch site region has a tendency of slow rise, with the number of the annual rainstorms slowly increases. The distribution of monthly occurrence number shows " quasi-bimodal" characteristic. The main peak is in the September and October. The second peak is in May and June. The non-typhoon rainstorm occurs mainly from April to October. In addition, geopotential height, wind and moisture distribution can well characterize the non-typhoon rainstorm circulation features.