气候变化领域集成服务门户(CCPortal): The Trends of Warm-Season Thunderstorm and Lightning Days in China and the Influence of Environmental Factors

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DOI	10.1029/2021JD034950
	The Trends of Warm-Season Thunderstorm and Lightning Days in China and the Influence of Environmental Factors
	Xue X.; Ren G.; Xu X.; Sun X.; Yang G.; Zhang P.; Zhang S.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:15
英文摘要	Previous studies indicated that numbers of meso-micro scale severe convective weather exhibited a significant decrease over China's mainland in the past decades. However, the possible mechanism of the decrease has not been well understood. This paper analyzes the changes in frequency of thunderstorm and lightning days using an updated data set of denser national observational stations and theirs links to the atmospheric circulation and regional environmental factors. The results confirm the highly significant decreasing trend of frequency of thunderstorm and lightning days during 1961–2013, with the decreasing rates of −2.6 days/10 years and −6.5 days/10 years in the warm season, respectively. The decrease of geopotential height difference between south and north, the weakening of westerly jet strength at 200 hPa and the decline of zonal wind speed of high level are found to be the direct reasons for the wide-spread decrease of thunderstorm and lightning days across the country. Meanwhile, there is a significant positive correlation between thunderstorm days and convective available potential energy (CAPE), indicating a reduction of potential atmospheric instability accompanying the decline of thunderstorm days especially in the south of China. The decrease in the relative humidity at the lower troposphere, the weakening of 0–6 km vertical wind shear and the accompanying slackening of actual convective activity, may have also contributed to the downward trends of the severe convective weather. Our analysis shows a strong link of the decreasing thunderstorm and lightning days to the long-term changes of the atmospheric circulation and environmental factors. Further investigation is needed to examine what have driven the changes of the environmental factors over the time period. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	CAPE; China; jet stream; lightning; relative humidity; thunderstorm; trend; vertical wind shear; zonal wind
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237082
作者单位	Department of Atmospheric Science, School of Environmental Studies, China University of Geosciences, Wuhan, China; Laboratory for Climate Studies, National Climate Center, China Meteorological Administration, Beijing, China; State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China; State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
推荐引用方式 GB/T 7714	Xue X.,Ren G.,Xu X.,et al. The Trends of Warm-Season Thunderstorm and Lightning Days in China and the Influence of Environmental Factors[J],2021,126(15).
APA	Xue X..,Ren G..,Xu X..,Sun X..,Yang G..,...&Zhang S..(2021).The Trends of Warm-Season Thunderstorm and Lightning Days in China and the Influence of Environmental Factors.Journal of Geophysical Research: Atmospheres,126(15).
MLA	Xue X.,et al."The Trends of Warm-Season Thunderstorm and Lightning Days in China and the Influence of Environmental Factors".Journal of Geophysical Research: Atmospheres 126.15(2021).