Spatio-Temporal Change of Sunshine Hour in Ningxia during the Past 50 Years
宁夏日照时数的时空变化特征分析

Seasonal,annual,and decadal changes of sunshine hour in Ningxia in recent 50 years were analyzed by the use of methods of climate tendency rate analysis,Kriging interpolation and wavelet analysis.The results showed that the annual sunshine hour decreased with an average rate of-2.23 h/10a,and the decrease trend was significant after 2000;The sunshine hour decreased in winter,but increased in spring;The annual sunshine hour increased from north to south,and the sunshine hour in the north region and the middl...