摘要
利用连山县1966—2015年日照时数资料,采用线性趋势分析、小波变换和Mann-Kendall突变检验等方法对近50年连山县日照变化进行了分析。结果表明,近50年连山县年日照时数总体呈减少趋势,变化率为-5.05 h/a,减少趋势非常显著;春、夏、秋、冬各季日照时数变化总体都呈减少趋势,气候倾向率分别为-0.74、-2.20、-1.44、-0.59 h/a。连山县年日照时数存在明显的多时间尺度变化,准16年特征时间尺度的周期振荡为主周期,25～28年尺度为第2周期。年日照时数在20世纪90年代初发生突变,具体是从1990年开始的。
According to the sunshine duration data from Lianshan County from 1966 to 2015,the sunshine hours changes of Lianshan County were analyzed by using climate trend analysis,wavelet transform and Mann-Kendall mutation testing method.The results showed that the annual sunshine hours of Lianshan County was a decreasing trend in recent 50 years,the change rate was-5.05 h/a,the decreasing trend was very significant;the change of sunshine hours in spring,summer,autumn and winter showed a decreasing trend,the climate tendency rates were-0.74,-2.20,-1.44,-0.59 h/a,respectively.There was a clear multi-time scale change in the sunshine hours in Lianshan County,quasi-16-year characteristic time scale was the main cycle,25-28 years was the second cycle.The sunshine hours had suddenly changed in early 1990s,it started in 1990.
作者
杨鑑斌
彭窈
阮楚雯
YANG Jian-bin;PENG Yao;RUAN Chu-wen(Alert Information Publish Center of Qingyuan City,Qingyuan,Guangdong 511500;Qingxin Meteorological Bureau,Qingyuan,Guangdong 511800;Lianzhou Meteorological Bureau,Lianzhou,Guangdong 513400)
出处
《安徽农业科学》
CAS
2019年第3期212-214,共3页
Journal of Anhui Agricultural Sciences
