气候变化领域集成服务门户(CCPortal): Decreasing trend of sunshine hours and related driving forces in Southwestern China

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DOI	10.1007/s00704-012-0583-4
	Decreasing trend of sunshine hours and related driving forces in Southwestern China
	Li Zongxing; Feng Qi; Zhang Wei; He Yuanqing; Wang Xufeng; Catto, Norm; An Wenlin; Du Jiankuo; Chen Aifang; Liu Li; Hu Meng
发表日期	2012
ISSN	0177-798X
EISSN	1434-4483
卷号	109 期号:2019-01-02
英文摘要	Total hours of sunshine are one of the most important factors affecting climate and environment, and its long-term variation is of much concern in climate studies. Trends of temporal and spatial patterns in sunshine hours and related climatic factors over southwestern China are evaluated for the period 1961-2009 based on data from 111 standard meteorological stations. The results showed that southwestern China is experiencing a statistical decrease of sunshine hours, at the rate of 31.9 h/10a during 1961-2009. The decline was particularly strong in summer, whereas it is nonsignificant in winter. Spatially, statistically significant decreases of sunshine hours mainly occurred in lower altitude regions, especially in the Sichuan basin and Guizhou plateau. Sunshine hours have a high correlation with wind speed, relative humidity, precipitation, cloud cover, surface downwards solar radiation flux, and cloud water content, with wind speed showing the strongest relationship to sunshine hours, implicit in the close correlation (temporally and spatially) between the two variables. Changing water vapor and cloud cover influence sunshine hours in southwestern China. In addition, the increased surface downwards solar radiation flux also made some contribution to a rise of sunshine hours during 1991-2009. The larger decreasing trends of sunshine hours at urban stations than rural stations may reflect the effect of urbanization on sunshine hours. Variations are dominated by the comprehensive functions of multiple factors owing to the complex nature of effects on sunshine hours.
学科领域	Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
来源期刊	THEORETICAL AND APPLIED CLIMATOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111671
作者单位	Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li Zongxing,Feng Qi,Zhang Wei,et al. Decreasing trend of sunshine hours and related driving forces in Southwestern China[J]. 中国科学院西北生态环境资源研究院,2012,109(2019-01-02).
APA	Li Zongxing.,Feng Qi.,Zhang Wei.,He Yuanqing.,Wang Xufeng.,...&Hu Meng.(2012).Decreasing trend of sunshine hours and related driving forces in Southwestern China.THEORETICAL AND APPLIED CLIMATOLOGY,109(2019-01-02).
MLA	Li Zongxing,et al."Decreasing trend of sunshine hours and related driving forces in Southwestern China".THEORETICAL AND APPLIED CLIMATOLOGY 109.2019-01-02(2012).