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学科主题: Meteorology & Atmospheric Sciences
题名: Summer high temperature extremes in Southeast China associated with the East Asian jet stream and circumglobal teleconnection
作者: [Wang, Weiwen ; Zhou, Wen] City Univ Hong Kong, Sch Energy & Environm, Guy Carpenter Asia Pacific Climate Impact Ctr, Hong Kong 00852, Hong Kong, Peoples R China ; [Wang, Weiwen ; Wang, Xin] Chinese Acad Sci, State Key Lab Trop Oceanog, South China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China ; [Fong, Soi Kun ; Leong, Ka Cheng] Macao Meteorol & Geophys Bur, Taipa, Peoples R China
通讯作者: wenzhou@cityu.edu.hk
关键词: high temperature extreme ; jet stream ; circumglobal teleconnection ; East Asia
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
发表日期: 2013
卷: 118, 期:15, 页:8306-8319
部门归属: LTO
资助者: This research is supported by 973 Basic research program Grant 2009CB421401, the National Nature Science Foundation of China grant 41175079, and Macao Meteorological and Geophysical Bureau (SMG) project 9231048.
摘要: High temperature extremes (HTEs) have received increasing attention due to their rising impacts on human mortality, regional economies, and ecosystems. In this study, HTEs are defined as days with daily maximum temperature above the 90th percentile derived from a specific climatological period. Occurrences of summer HTEs in Southeast China (south of 35 degrees N and east of 105 degrees E) associated with atmospheric anomalies are investigated. Two key domains in the upper level that are associated with HTE variation, the exit and the tail of the East Asian Jet Stream (EAJS), are identified. Poleward displacement of the exit is associated with warming tropospheric temperatures over East Asia and tends to be linked with high HTE frequency, while enhancement of the tail is associated with cooling tropospheric temperatures in the northern Pacific and tends to be linked with low HTE frequency. A possible reflection effect of the stratosphere on cool summers in Southeast China is proposed. Furthermore, these two domains are in essence two sectors of the phase-locked circumglobal teleconnection (CGT) pattern in the Northern Hemisphere. Linkages are found between HTEs in Southeast China and precipitation anomalies in the Indian summer monsoon region, and also in extratropical regions such as northeastern Europe. These teleconnections are set up through the CGT pattern associated with the westerly jet in the midlatitudes. These findings may be a source of variability and predictability of HTEs in Southeast China.
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000324032900014
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10891
Appears in Collections:热带海洋环境国家重点实验室(LTO)_期刊论文

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[Wang, Weiwen; Zhou, Wen] City Univ Hong Kong, Sch Energy & Environm, Guy Carpenter Asia Pacific Climate Impact Ctr, Hong Kong 00852, Hong Kong, Peoples R China; [Wang, Weiwen; Wang, Xin] Chinese Acad Sci, State Key Lab Trop Oceanog, South China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China; [Fong, Soi Kun; Leong, Ka Cheng] Macao Meteorol & Geophys Bur, Taipa, Peoples R China.Summer high temperature extremes in Southeast China associated with the East Asian jet stream and circumglobal teleconnection,JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2013,118(15):8306-8319
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