| 1971-2015年无棣县日照时数变化及影响因素分析 |
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| 引用本文： | 徐青文,路淑文,刘树棣,王明涛,付华波.1971-2015年无棣县日照时数变化及影响因素分析[J].湖北农业科学,2017,56(20). |
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| 作者姓名： | 徐青文 路淑文 刘树棣 王明涛 付华波 |
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| 作者单位： | 山东省无棣县气象局,山东 滨州,251900 |
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| 摘 要： | 根据无棣国家一般气象站1971-2015年近45年的日照数据资料,利用线性拟合、相关系数、Mann-Kendall非参数检验等方法分析了日照时数的年、季、月变化规律,并探讨了日照时数变化与雾日数、相对湿度、云量的关系.结果表明,①无棣县年日照时数呈下降趋势,倾向率为-12.528 h/年.自2001年开始,年日照时数低于近30年平均值.②日照时数的季节变化规律与年变化规律一致.其中,春季日照时数最多,冬季日照时数最少,秋季日照时数的减少最显著.③日照时数的各月数值呈减少趋势,9月日照时数减少最明显.④年日照时数的突变时间为2000年.⑤总云量、雾日数与年日照时数、季日照时数的变化相关性较强.而相对湿度、低云量的相关性较弱.⑥无棣县日照时数的减少与城市化进程的推进、高楼建筑增多、热岛效应增强、汽车、化工厂污染物排放量增加、大气气溶胶增加有密切关系.
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| 关 键 词： | 日照时数 雾日数 变化特征 |
Analysis on the Changes of the Sunshine Duration of Wudi County from 1971 to 2015 and the Influencing Factors |
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| XU Qing-wen,LU Shu-wen,LIU Shu-di,WANG Ming-tao,FU Hua-bo.Analysis on the Changes of the Sunshine Duration of Wudi County from 1971 to 2015 and the Influencing Factors[J].Hubei Agricultural Sciences,2017,56(20). |
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| Authors: | XU Qing-wen LU Shu-wen LIU Shu-di WANG Ming-tao FU Hua-bo |
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| Abstract: | According to the sunshine data of the 45 years from 1971 to 2015 provided by National Meteorological Station of Wudi county, linear fitting, correlation coefficient, and Mann-Kendall non-parametric test were adopted to explore the change law of sunshine duration monthly, quarterly and annually, and the relation between the changes of sunshine duration and fog days, relative humidity and cloud cover was discussed. The results showed that, ①The annual sunshine duration of Wudi county showed a downward trend, and the inclination rate was -12.528 h/a. Since 2001, the annual sunshine duration had been lower than the average value of the recent 30 years. ②The quarterly change law of sunshine duration was consistent with the annual change law. The sunshine duration in spring was the longest throughout the year while it was the shortest in winter. The sunshine duration in autumn reduced significantly. ③The monthly sunshine duration showed a decreasing trend, and it decreased most significantly in September. ④The jump time of annual sunshine duration was in 2000. ⑤Total cloud cover and fog days had a strong dependency with annual sunshine duration. While relative humidity and low cloud cover had a weak dependency with annual sunshine duration. ⑥The reduction of sunshine duration in Wudi county was mainly caused by the advancement of urbanization, the increase of high-rise buildings, the enhancement of heat island effect, the aggrava-tion of pollutants emission of vehicles and chemical plants, and the increase of atmospheric aerosol. |
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| Keywords: | sunshine duration fog days change characteristics |
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