河南降水及最长连续无降水日数时空特征

利用河南省均匀分布的50个台站自建站至1997年近50年的定时降水资料，分析了河南省日小雨、日中雨、日大雨降水过程出现次数和最长连续无降水日数，结果显示，河南省日小雨、日中雨降水过程一年四季均可出现，日大而过程主要出现在3～11月份，冬季仅在豫南一些台站出现，各级降水过程出现次数季节性变化明显，冬季出现最少，夏季出现最多，其地理分布随测站纬度、拔海高度、地形地貌不同有较大差异；最长连续无降水日数也有明显的季节性变化特点，其最大值多出现在冬季，春秋次之，夏季最小，地理位置差异也较明显。

The Spacial and Temporal Character of Precipitation and Number of the Longest Continued Non - Precipitation Day in Henan

The numbers of light rain, moderate rain, heavy rain process generated in daytime and the numbers of the longest continuous non - precipitation day are analyzed, using the precipitation data within fifty years from being founded to the year of 1997 of fifty stations in Henan province. The light rain and moderate rain can generate in any season. The heavy rain mainly generates between March and November,in winter they only generate in some stations located in south of Henan. Further more the number of every type process vary evidently with season, it is the least in winter, the most in summer. Their distribution vary with latitude,elevation and landform. The number of the longest continued non - precipitation day vary with season as well, the maximum lies in winter, the minor in spring and autumn, the least in summer,the difference in distribution is obvious too.