气候变化领域集成服务门户(CCPortal): Record-breaking heat wave in southern China and delayed onset of South China Sea summer monsoon driven by the Pacific subtropical high

CCPortal

DOI	10.1007/s00382-020-05203-8
	Record-breaking heat wave in southern China and delayed onset of South China Sea summer monsoon driven by the Pacific subtropical high
	Deng K.; Yang S.; Gu D.; Lin A.; Li C.
发表日期	2020
ISSN	0930-7575
起始页码	3751
结束页码	3764
卷号	54
英文摘要	We investigate a record-breaking heat wave in southern China (SC) and explore its association with the South China Sea (SCS) summer monsoon (SCSSM), using station observations and various reanalysis products. This heat wave event started in mid-May 2018 and persisted more than 15 days, when the maximum air temperature anomaly exceeded 6 °C. Meanwhile, the onset of the SCSSM was extremely late in 2018, primarily due to the intrusion of easterly winds over the SCS. We show that the anomalous easterlies over the SCS associated with the delayed SCSSM could block the moisture transport from the tropical oceans to SC, which led to decreased rainfall, increased surface radiation, and elevated probability of heat wave in SC during May 2018. Further analysis reveals that both SC heat waves and SCSSM were significantly affected by the Pacific subtropical high (PSH). The westward extension of the PSH can hinder the establishment of SCSSM via inducing easterly anomalies over the SCS, which reduces SC rainfall and results in a drier surface condition. Moreover, the westward displacement of the PSH may cause anomalously high pressures, descending air motions, and divergent winds over SC, which triggers above-normal air temperatures that are conducive to the occurrences of SC heat waves. This study also underlines the importance of Eurasian planetary wave trains in bridging the upstream climate variability and the changes in PSH during boreal spring, which could be used to improve the intra-seasonal predictions of SC heat wave and SCSSM onset. © 2020, The Author(s).
英文关键词	Heat waves; Pacific subtropical high; South China Sea summer monsoon; Southern China
语种	英语
scopus关键词	air temperature; climate variation; heat wave; moisture transfer; monsoon; planetary wave; summer; temperature anomaly; Pacific Ocean; South China Sea
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145513
作者单位	School of Atmospheric Sciences, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, 510275, China; Regional Climate Group, Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden; Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Guangzhou, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, Guangdong, China; Guangzhou Institute of Tropical and Marine Meteorology, CMA, Guangzhou, China
推荐引用方式 GB/T 7714	Deng K.,Yang S.,Gu D.,et al. Record-breaking heat wave in southern China and delayed onset of South China Sea summer monsoon driven by the Pacific subtropical high[J],2020,54.
APA	Deng K.,Yang S.,Gu D.,Lin A.,&Li C..(2020).Record-breaking heat wave in southern China and delayed onset of South China Sea summer monsoon driven by the Pacific subtropical high.Climate Dynamics,54.
MLA	Deng K.,et al."Record-breaking heat wave in southern China and delayed onset of South China Sea summer monsoon driven by the Pacific subtropical high".Climate Dynamics 54(2020).