Variation Characteristic of Sunshine Duration in Xining in Recent 50 Years
近50年西宁市日照时数变化规律分析

The climate change characteristics of decade,annual,seasonal and monthly sunshine durations in Xining city were analyzed based on the observed data of sunshine duration in Xining city in recent 50 years.The resu1ts indicate that in recent 50 years,the sunshine duration decreased with a tendency of 75.1 h per ten years;the interannual variation amplitude is obvious;and the difference of the sunshine duration between 1963 and 2007 reaches up 635.3 h.There is obvious seasonal difference in sunshine duration,th...