田阳县近50a降水变化趋势特征分析

利用气候倾向率及相关系数分析方法,对站田阳站1959～2008年的年、季降水量、降水日数作统计分析。结果发现,田阳站50a年、季降水量随时间变化总趋势平稳少变,年降水气候倾向率为3.09mm/10a;小雨、中雨量级降水日数气候倾向率呈负值,小雨日数50a趋减9d;大雨以上强降水气候倾向率呈正值,表明强降水日数趋增。

Precipitation Variation Characteristics of Tianyang County in Recent 50 Years

Using such methods as climate tendency rate and correlation coefficient,the annual,seasonal precipitation and the precipitation days of Tianyang stations from1959-2008 were statistical analyzed.The results show that the annual,seasonal precipitation were stable.The climatic tendency of annual precipitation was 3.09mm/10a.The climate trend rate of drizzle,moderate rain(heavy rain) days were negative(positive).The number of light rain days reduced 9 days in the past 50 years,while the heavy precipitation days...