DOI: 10.1007/s00382-015-2741-8
Scopus记录号: 2-s2.0-84937676567
论文题名: Synoptic-scale characteristics and atmospheric controls of summer heat waves in China
作者: Wang W. ; Zhou W. ; Li X. ; Wang X. ; Wang D.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期: 2017-09-10 起始页码: 2923
结束页码: 2941
语种: 英语
英文关键词: East Asian jet stream
; Heat low
; Heat wave
; Synoptic-scale
; Western North Pacific subtropical high
英文摘要: 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. © 2015, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53770
Appears in Collections: 过去全球变化的重建
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作者单位: Guy Carpenter Asia–Pacific Climate Impact Centre, School of Energy and Environment, City University of Hong Kong, Tat Chee Ave 83, Kowloon, Hong Kong, China; State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; School of Architecture, The Chinese University of Hong Kong, Shatin, Hong Kong, China
Recommended Citation:
Wang W.,Zhou W.,Li X.,et al. Synoptic-scale characteristics and atmospheric controls of summer heat waves in China[J]. Climate Dynamics,2016-01-01,46(2017-09-10)