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《Meteorology and Disaster Reduction Research》 2018-02
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Analysis on Characteristics of Short-Duration Heavy Precipitation in Chizhou Area during 2006-2016

Wu Zhaoxian;Hu Jianchun;Zhang Mingming;Anhui Provincial Meteorological Bureau;  
Based on the 2006-2016 meteorological data of Chizhou regional station and national basic station,the temporal and spatial distribution characteristics of short-duration heavy rainfall were analyzed and three conceptual models were established.The corresponding general characteristics of mesoscale system and its physical quantity and radar echo were summarized.The results showed that the short-duration heavy precipitation in Chizhou was mainly occurred in flood season,most happened in July,followed by June and August.The daily variation of short-duration strong precipitation presented bimodal characteristics as the precipitation strength more than 20 mm/h and 30 mm/h,while presented a single-peak as the precipitation strength more than50 mm/h.The short-duration heavy precipitation mainly occurred in the county of Dongzhi.The short-duration heavy rainfall can be divided into subtropical high edge type,northwest airflow type and typhoon type,and the subtropical high edge type was prone to causing short-duration heavy precipitation;The small and mesoscale system had different influences on different weather types,while the corresponding physical differences were not significant;The radar's reflectivity factors of subtropical high edge and typhoon types were characterized by low centroid structure,but the northwest airflow pattern presented high centroid structure.
【Fund】: 安徽省气象局预报员专项(编号:KY201808)
【CateGory Index】: P458.121
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