干旱区研究 ›› 2023, Vol. 40 ›› Issue (12): 1885-1897.doi: 10.13866/j.azr.2023.12.02 cstr: 32277.14.j.azr.2023.12.02

• 天气与气候 • 上一篇    下一篇

敦煌太阳总辐射多时间尺度变化特征及影响因素

王云鹏1(),李红英1(),姚玉璧2,李栋梁3,范琦玮1,刘香萍4   

  1. 1.酒泉市气象局,甘肃 酒泉 735000
    2.兰州资源环境职业技术大学,甘肃 兰州 730021
    3.南京信息工程大学,江苏 南京 210044
    4.敦煌市气象局,甘肃 敦煌 736200
  • 收稿日期:2023-03-20 修回日期:2023-10-09 出版日期:2023-12-15 发布日期:2023-12-18
  • 作者简介:王云鹏(1967-),男,高级工程师,主要从事应用气象研究. E-mail: 25592188@163.com
  • 基金资助:
    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);甘肃省自然科学基金(22JR5RF1080);2022年度酒泉市科技计划项目(2022MB1038)

Multi-time scale change characteristics and influencing factors of total solar radiation in Dunhuang City

WANG Yunpeng1(),LI Hongying1(),YAO Yubi2,LI Dongliang3,FAN Qiwei1,LIU Xiangping4   

  1. 1. Jiuquan Meteorological Bureau, Jiuquan 735000, Gansu, China
    2. Lanzhou Resources and Environment Vocational and Technical University, Lanzhou 730021, Gansu, China
    3. Nanjing University of Information Science & Technology, Nanjing 210044, Jiangsu, China
    4. Dunhuang Meteorological Bureau, Dunhuang 736200, Gansu, China
  • Received:2023-03-20 Revised:2023-10-09 Published:2023-12-15 Online:2023-12-18

摘要:

采用集合经验模态分解(EEMD)以及M-K突变检验方法,基于敦煌市1971—2020年太阳总辐射、相对湿度、总云量和沙尘日数等气象资料,分析了敦煌市太阳总辐射演变的多时间尺度特征,探讨了影响敦煌市太阳辐射的关键气象因素。结果表明:(1) 1971—2020年敦煌市年太阳总辐射上升趋势显著,线性气候倾向率为49.6 MJ·m-2·(10a)-1,多年平均年辐射量为6354.0 MJ·m-2,属于太阳能资源最丰富区。年辐射在1970年代最少,2010年代最大。敦煌市太阳辐射四季分明,辐射量夏季>春季>秋季>冬季,分别以32.5、13.4、2.9 MJ·m-2·(10a)-1和1.1 MJ·m-2?(10a)-1的速率增加。近50 a敦煌市太阳总辐射以2.9 a和7.1 a的年际变化和16.7 a的年代际变化占主导地位。(2) 月太阳辐射变化呈“单峰型”,从3月开始急剧增加,5月达峰值,6月开始逐渐下降,12月达全年最低值。太阳总辐射小时分布呈单峰型,一天中最大值出现在12:00—13:00。(3) 年、春季和夏季太阳辐射变化的突变时间为1997年、2000年和1982年。(4) 影响敦煌太阳辐射的气象要素可归结为三个因子:大气透明度因子、光照因子和湿度因子,不同季节各气象因子与太阳辐射的相关性有所差异。

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

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.

Key words: solar radiation, variation characteristics, ensemble empirical mode method, mutation test, meteorological elements, Dunhuang City