定安县近40年气候变化特征分析

Characteristic of Climate Change of Dingan in Recent 40years

采用一元线性回归、累计距平、标准差异常分析等统计方法,分析近40年来定安县气温和降水变化特征。结果表明:(1)近40年来,定安县年、季温度呈变暖趋势,而年降水、汛期呈递减趋势;(2)定安县年平均气温变化可分为2个冷期和2个暖期,降水量演变大体上可分为2个多雨期和3个少雨期。

This paper analyzed the variation of temperature and precipitation in Dingan with the statistical method of linear regression,accumulated anomaly,and exception analysis of standard deviation.The results showed that：（1）annual and seasonal temperature were getting warmer while the annual precipitation and flood season were less in recent 40a of Dingan;（2） the variation of annual average temperature could be divided into 2 clod periods and 2 warm periods,and the variation of precipitation could be divided into 2 rainy periods and 3 brief rain period.