福州市近70年日照变化趋势分析

Analysis of Sunshine Variation Trend in Fuzhou in Recent 70 years

利用福州市1951—2020年的逐日日照资料,采用线性倾向估计、累积距平法和MannKendall检验法对福州市日照时数变化特征及突变情况进行了分析。结果表明:福州市日照时数总体上呈减少趋势,气候倾向率为71.338 h/10年;四季日照时数也呈减少趋势,其中,夏、冬季节减少幅度最大;福州市日照时数在1980年左右发生由多向少的突变。

Based on the daily sunshine data of Fuzhou from 1951 to 2020, the variation characteristics and mutation of sunshine hours in Fuzhou were analyzed by using linear tendency estimation, cumulative anomaly method and Mann-Kendall test.The results show that the sunshine hours in Fuzhou generally show a decreasing trend,and the climatic tendency rate is 71.338h/10 a. The sunshine hours in four seasons also show a decreasing trend, with the largest reduction in summer and winter. The number of sunshine hours in Fuzhou changed from more to less around 1980.