European hot summers associated with a reduction of cloudiness

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	European hot summers associated with a reduction of cloudiness
	Tang Qiuhong
	2012
关键词	Clouds Climatology Remote sensing Temperature
英文摘要	A pronounced summer warming is observed in Europe since the 1980s that has been accompanied by an increase in the occurrence of heat waves. Water deficit that strongly reduces surface latent cooling is a widely accepted explanation for the causes of hot summers. The authors show that the variance of European summer temperature is partly explained by changes in summer cloudiness. Using observation-based products of climate variables, satellite-derived cloud cover, and radiation products, the authors show that, during the 1984-2007 period, Europe has become less cloudy (except northeastern Europe) and the regions east of Europe have become cloudier in summer daytime. In response, the summer temperatures increased in the areas of total cloud cover decrease and stalled or declined in the areas of cloud cover increase. Trends in the surface shortwave radiation are generally positive (negative) in the regions with summer warming (cooling or stalled warming), whereas the signs of trends in top-of-atmosphere (TOA) reflected shortwave radiation are reversed. The authors' results suggest that total cloud cover is either the important local factor influencing the summer temperature changes in Europe or a major indicator of these changes. 2012 American Meteorological Society.
出处	Journal of Climate
卷	25 期:10 页:3637-3644
收录类别	EI
内容类型	EI期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/31363]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Tang Qiuhong. European hot summers associated with a reduction of cloudiness. 2012.