干旱区研究2023，Vol.40Issue(12)：1885-1897,13.DOI:10.13866/j.azr.2023.12.02
敦煌太阳总辐射多时间尺度变化特征及影响因素
Multi-time scale change characteristics and influencing factors of total solar radiation in Dunhuang City
摘要
Abstract
Using ensemble empirical mode decomposition and the M-K mutation test,the multi-times cale characteristics of the evolution of total solar radiation in Dunhuang city were analyzed based on the meteorological data of total solar radiation,relative humidity,total cloudiness,and dust days in Dunhuang city between 1971 and 2020.The key meteorological factors influencing solar radiation in Dunhuang city were explored.The results show the following:(1)There was a significant upward trend of annual total solar radiation in Dunhuang city between 1971 and 2020,with a linear climate propensity rate of 49.6 MJ·m-2·(10a)-1,and the multiyear average annual radiation was 6354.0 MJ·m-2,belonging to the area with the most abundant solar resources.The annual radiation was lowest in the 1970s and highest in the 2010s.Dunhuang has four distinct seasons of solar radiation,with radiation increasing at rates of 32.5,13.4,2.9,and 1.1 MJ·m-2·(10a)-1 in summer>spring>fall>winter,respectively.The total solar radiation in Dunhuang city in the last 50 years was dominated by interannual variations of 2.9 and 7.1 years and interdecadal variations of 16.7 years.(2)Monthly solar radiation varied in a"single-peak"pattern,with a sharp increase in March,a peak in May,a gradual decrease in June,and a yearly minimum in December.The hourly distribution of total solar radiation is monomodal,with the maximum occurring between 12:00 and 13:00 a.m.(3)The annual,spring,and summer solar radiation changes were abrupt in 1997,2000,and 1982.(4)Meteorological factors affecting solar radiation at Dunhuang can be attributed to three factors:atmospheric transparency,illumination,and humidity,and the correlation between each meteorological factor and solar radiation varies according to the seasons.关键词
太阳辐射/变化特征/集合经验模态方法/突变检验/气象要素/敦煌Key words
solar radiation/variation characteristics/ensemble empirical mode method/mutation test/meteorological elements/Dunhuang City引用本文复制引用
王云鹏,李红英,姚玉璧,李栋梁,范琦玮,刘香萍..敦煌太阳总辐射多时间尺度变化特征及影响因素[J].干旱区研究,2023,40(12):1885-1897,13.基金项目
甘肃省高等学校产业支撑计划项目"一带一路"太阳能高辐射区光能开发潜力与利用效率评估研究及应用(2020C-34) （2020C-34）
甘肃省自然科学基金(22JR5RF1080) （22JR5RF1080）
2022年度酒泉市科技计划项目(2022MB1038) （2022MB1038）
