近63 a安康地区降水与太阳黑子活动的相关性分析

Correlation Between Sunspot Activity and Precipitation in the Ankang Region in Recent 63 Years

依据安康气象局安康站1953—2015年逐日降水量和太阳黑子逐年相对数,利用Mann-Kendall突变检验、Morlet小波分析等方法,对安康地区近63 a降水变化特征及其与太阳黑子相对数关系进行了分析。结果显示：近63 a安康地区年降水量以及夏季降水整体呈增加趋势,增加量分别为0.99 mm·a^-1、1.65 mm·a^-1,春季、秋季和冬季降水整体呈下降趋势,减少量分别为0.26 mm·a^-1、0.35 mm·a^-1、0.06 mm·a^-1,降水集中分布在夏季和秋季。年降水距平极值与太阳黑子相对数峰谷值主要存在0-3 a滞后;近63 a安康地区年降水有显著3 a和28 a的变化周期,与太阳黑子相对数的9 a变化周期存在一定差异。

In this study,the Mann-Kendall test and Morlet wavelet analysis were used to lucubrate the variation of precipitation and its relationship with the relative number of sunspots in the Ankang region in recent 63 years based on the data of relative annual number of sunspots and daily precipitation observed by Ankang Meteorological Station,Ankang Meteorological Bureau during the period of 1953-2015.The results showed that,in the Ankang region,the annual and summer precipitations were significantly increased with increments of 0.99 mm·a^-1and1.65 mm·a^-1respectively.The spring,autumn and winter precipitations were decreased slightly with reductions of 0.26 mm·a^-1,0.35 mm·a^-1and 0.06 mm·a^-1respectively.Precipitation occurred mainly in summer and autumn.There was a 0-3 a time lag of the anomaly of extreme precipitation than the occurrence of peak-valley value of relative sunspot number.There were the significant 3 a and 28 a variation periods of annual precipitation in the Ankang region,which was different from the 9 year variation period of relative sunspot number.