在华南上的坚持的重降雨事件(PHRE ) 在 1981-2014 期间被选择并且由一个客观方法分类,基于在在中国的 752 个车站的每日的降水数据。发行量特征,以及 PHRE 的每种类型的干燥寒冷的空气和潮湿来源被检验。主要结果如下。32 非台风的一个总数在华南影响了 PHRE 在学习时期上被识别。由关联分析, PHRE 被划分成三种类型:SC -- 一种类型,与它位于沿海的区域和广东的东北的主要 rainbelt 省;SC-B 类型,与它在广东之间的主要 rainbelt 省和 Guangxi 区域;并且 SC-C 类型,与它位于 Guangxi 的北方的主要 rainbelt 区域。为 SC -- A 事件,干燥寒冷的空气在从乌拉尔山和韦斯特西伯利亚平原发源的中间的对流层在马槽的驾驶效果下面飞到华南;而, SC-C 事件没被冷空气从高纬度影响。来自为两个的低纬度的区域有三条水蒸汽小径 SC -- A 和 SC-C PHRE。热带印度洋是为这二种 PHRE 类型的主要的水蒸汽来源,当华南海也贡献了 SC-C PHRE 时。另外, SC -- A 事件被从黄海发源的潮湿、冷的空气也影响。通常, SC-C PHRE 属于一种温暖扇区的降雨类型,区域其猛冲被西南的风,和集中处于风速度统治,是为降水的主要原因。
Persistent heavy rainfall events (PHREs) over South China during 1981 2014 were selected and classified by an objective method, based on the daily precipitation data at 752 stations in China. The circulation characteristics, as well as the dry-cold air and moisture sources of each type of PHREs were examined. The main results are as follows. A total of 32 non-typhoon influenced PHREs in South China were identified over the study period. By correlation analysis, the PHREs are divided into three types: SC-A type, with its main rainbelt located in the coastal areas and the northeast of Guangdong Province; SC-B type, with its main rainbelt between Guangdong Province and Guangxi Region; and SC-C type, with its main rainbelt located in the north of Guangxi Region. For the SC-A events, dry-cold air flew to South China under the steering effect of troughs in the middle troposphere which originated from the Ural Mountains and West Siberia Plain; whereas, the SC-C events were not influenced by the cold air from high latitudes. There were three water vapor pathways from low-latitude areas for both the SC-A and SC-C PHREs. The tropical Indian Ocean was the main water vapor source for these two PHRE types, while the South China Sea also contributed to the SC-C PHREs. In addition, the SC-A events were also influenced by moist and cold air originating from the Yellow Sea. Generally, the SC-C PHREs belonged to a warm-sector rainfall type, whose precipitation areas were dominated by southwesterly wind, and the convergence in wind speed was the main reason for precipitation.