Variation Characteristics of Sunshine Duration in Xiuwen of Guizhou From 1963 to 2020
Based on the sunshine duration data from 1963 to 2020,the characteristics were analyzed by the trend test and Mann-Kendall test.It is found that,the annual sunshine duration was 1257.5h and exhibited a downward trend.The climatic tendency rate of annual sunshine duration was-46 h/10 a.The sunshine duration in spring,summer,autumn and winter showed a decreasing trend.The sunshine duration was relatively more from April to September.The annual sunshine duration had an abrupt change around 2007.The number of sunshine duration in September had an abrupt change from more to less between 2017 and 2019 and the sunshine duration in spring,summer,autumn and winter all changed from more to less.
NETL
NSTL
万方数据
