气候变化领域集成服务门户(CCPortal): Comparison of the circulation anomalies associated with wet and dry extreme heat in South Korea and Southern-central Japan

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DOI	10.1175/JCLI-D-20-0260.1
	Comparison of the circulation anomalies associated with wet and dry extreme heat in South Korea and Southern-central Japan
	Xu K.; Lu R.; Na Y.; Kim B.-J.; Mao J.; Byon J.-Y.; Pang B.
发表日期	2021
ISSN	08948755
起始页码	1649
结束页码	1665
卷号	34 期号:5
英文摘要	This study indicates a significant variation of humidity on extreme heat (EH) days over South Korea and southern-central Japan during the period 1979-2018. EH is therefore classified into three categories: type-A wet EH, type-B wet EH, and dry EH. Their statistical characteristics and formation mechanisms are investigated and compared. Our results suggest that the type-A wet EH is the most destructive, with the highest intensity, longest duration, and broadest spatial scale covering most of midlatitude East Asia. By contrast, type-B wet EH and dry EH are weaker, shorter, and mostly confined to northeast Asia. Despite these differences in characteristics, both types of wet EH are caused by the poleward advance of tropical warm and humid air masses as a result of the northward displacement of the Asian westerly jet. By contrast, dry EH is primarily induced by an increase in adiabatic heating and solar radiation resulting from anomalous subsidence. The three types of EH are associated with distinct large-scale teleconnections over Eurasia. A stable and persistent tripole wave pattern is responsible for type-A wet EH. The activity of atmospheric blocking over northern Europe, where the pattern originates, plays a crucial role in maintaining this pattern. By contrast, type-B wet EH and dry EH are related to a quadrupole pattern and a Silk Road pattern-like teleconnection, respectively, both lasting for a shorter time. These results highlight the diversity of EH, which suggests that multiple local and large-scale circulations should be considered to improve the forecast skills for EH. © 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Asia; Atmospheric circulation; Extreme events; Temperature
语种	英语
scopus关键词	Climate models; Climatology; Adiabatic heating; Atmospheric blocking; Circulation anomalies; Formation mechanism; Large-scale circulation; Statistical characteristics; Teleconnections; Three categories; Atmospheric humidity; atmospheric circulation; comparative study; extreme event; formation mechanism; humidity; teleconnection; temperature; Japan; South Korea
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178701
作者单位	LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; College of Earth and Planetary Sciences, University of the Chinese, Academy of Sciences, Beijing, China; Beijing Regional Climate Center, Beijing, China; National Institute of Meteorological Sciences, Korea Meteorological Administration, Jeju-do, South Korea
推荐引用方式 GB/T 7714	Xu K.,Lu R.,Na Y.,et al. Comparison of the circulation anomalies associated with wet and dry extreme heat in South Korea and Southern-central Japan[J],2021,34(5).
APA	Xu K..,Lu R..,Na Y..,Kim B.-J..,Mao J..,...&Pang B..(2021).Comparison of the circulation anomalies associated with wet and dry extreme heat in South Korea and Southern-central Japan.Journal of Climate,34(5).
MLA	Xu K.,et al."Comparison of the circulation anomalies associated with wet and dry extreme heat in South Korea and Southern-central Japan".Journal of Climate 34.5(2021).