安徽梅雨年际变化特征研究

本文对安徽省1951～2002年52a的入梅日期、出梅日期、梅雨日数、梅雨期降水总量等数据进行了统计。反映梅雨期年际变化特征的分析结果表明：安徽省入梅日期主要集中在6月的第2候和第4候，出梅日期主要集中在7月第2候；入梅日期的早晚与梅雨期天气形势、梅雨日数、梅雨期总降水量有着一定的对应关系。文中揭示的有关梅雨期年际变化特征，对于做好入梅日期、梅雨日数、梅雨期总降水量的预报，进而做好防汛抗旱的服务工作具有一定的参考意义。

THE STUDY OF INTERANNUAL CHANGES ABOUT THE MEIYU PERIOD IN ANHUI PROVINCE

In this paper, by using of the Meiyu data of 52 years from 1951 to 2002 in Anhui province, the first day, the last day, the length and the total precipitations of the Meiyu period are discussed. The results show that the beginning of the Meiyu period is always in the second pentad or the fourth pentad in June, and the end of the Meiyu period is usually in second pentad in July. There are correlativities between the first day of the Meiyu period and the weather pattern, the length of the Meiyu period, the total precipitations of the Meiyu period. The characteristic of the interannual changes about the Meiyu period that we found in this paper will develop our skills about how to make the more accurate forecast about the first day, the last day, the length and the total precipitations of the Meiyu period. Furthermore, it will help us to do our flood- control and drought-resistance services better.