Synoptic-scale characteristics and atmospheric controls of summer heat waves in China

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Synoptic-scale characteristics and atmospheric controls of summer heat waves in China
	Wang, Weiwen; Zhou, Wen; Li, Xiuzhen; Wang, Xin; Wang, Dongxiao
刊名	CLIMATE DYNAMICS
	2016
卷号	46 期号:2016-09-10 页码:2923-2941
关键词	Heat wave Synoptic-scale East Asian jet stream Western North Pacific subtropical high Heat low
通讯作者	Zhou, W (reprint author), City Univ Hong Kong, Sch Energy & Environm, Guy Carpenter Asia Pacific Climate Impact Ctr, Tat Chee Ave 83, Kowloon, Hong Kong, Peoples R China.
中文摘要	Summer heat waves with persistent extreme high temperatures have been occurring with increasing frequency in recent decades. These extreme events have disastrous consequences for human health, economies, and ecosystems. In this study, we examine three summers with intense and protracted heat waves: the summers of 2003, 2006, and 2013, with high temperatures located mainly in southeastern, southwestern, and eastern China, respectively. The synoptic-scale characteristics of these heat waves and associated atmospheric circulation anomalies are investigated. In the early heat wave episode of 2003, a heat center was located in the southeast coastal provinces during the first 20 days of July. The maximum southward displacement of the East Asian jet stream (EAJS) induced anticyclonic anomalies to the south, associated with southwestward intensification of the western North Pacific subtropical high (WNPSH), and extreme high temperatures were found only to the south of the Yangtze River. In the later episode, a poleward displacement of the EAJS and an enhanced WNPSH over the midlatitudes of eastern China resulted in a "heat dome" over the region, and the heat wave extended northward to cover a larger area of eastern China. The coupling between the westward-enhanced WNPSH and poleward-displaced EAJS was found in the East China heat wave of 2013 as well. But the area of high temperatures reached far to the north in August 2013, with below-normal temperatures located in a small region of South China. In the 2006 southwestern drought and heat wave, extreme poleward displacement of the EAJS, associated with extraordinary westward extension of the WNSPH, resulted in further blocking of the moisture supply from the southwest monsoon. Large-scale moisture deficiencies, dry conditions, and downslope winds were common features of all investigated heat wave episodes. But in 2006, low-level heat lows associated with a well-mixed layer due to intensive daytime heating and atmospheric turbulence were emphasized.
学科主题	Meteorology & Atmospheric Sciences
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/15369]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	Wang, Weiwen,Zhou, Wen,Li, Xiuzhen,et al. Synoptic-scale characteristics and atmospheric controls of summer heat waves in China[J]. CLIMATE DYNAMICS,2016,46(2016-09-10):2923-2941.
APA	Wang, Weiwen,Zhou, Wen,Li, Xiuzhen,Wang, Xin,&Wang, Dongxiao.(2016).Synoptic-scale characteristics and atmospheric controls of summer heat waves in China.CLIMATE DYNAMICS,46(2016-09-10),2923-2941.
MLA	Wang, Weiwen,et al."Synoptic-scale characteristics and atmospheric controls of summer heat waves in China".CLIMATE DYNAMICS 46.2016-09-10(2016):2923-2941.