Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/ab7d07 |
Summer heat extremes in northern continents linked to developing ENSO events | |
Luo, Ming1,2,3; Lau, Ngar-Cheung3,4 | |
2020-07-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2020 |
卷号 | 15期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Understanding the variations of extreme weather/climate events is important to improve the seasonal forecast skill of such harmful events. Previous studies have linked boreal summer hot extremes to decaying El Nino-Southern Oscillation (ENSO) events at the interannual scale, but how these hot extreme episodes respond to developing ENSO events remains unclear. Using observational analyses, we demonstrate strong linkages between developing ENSO and extreme heat events in northern continents. In particular, heat extremes in North America, Eastern Europe-Central Asia and Northeast Asia tend to be more frequent during La Nina developing summers and less frequent during El Nino developing phases. Associated atmospheric changes reveal that developing ENSO events feature a circumglobal teleconnection (CGT) pattern over the mid-latitudes. In the La Nina developing summer, this CGT pattern exhibits enhanced geopotential height and anomalous anticyclones over North Pacific, North America, Eastern Europe-Central Asia and Northeastern Asia, and the jet stream generally shifts northward. The atmospheric circulation changes lead to more persistent weather conditions that favor extreme heat events in mid-latitudes. Conversely, opposite changes associated with developing El Nino can inhibit heat extremes in the above locations. The responses of heat extremes to different types (i.e., conventional Eastern Pacific and Modoki Central Pacific) and durations (1 and 2 year) of ENSO events are also discussed. |
英文关键词 | summer heat extremes El Nino-Southern Oscillation interannual variability circumglobal teleconnection jet stream |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000552683700001 |
WOS关键词 | NINO-SOUTHERN OSCILLATION ; SEA-SURFACE TEMPERATURE ; EAST-ASIAN SUMMER ; EL-NINO ; CIRCUMGLOBAL TELECONNECTION ; CLIMATE VARIABILITY ; LA-NINA ; PACIFIC ; WAVES ; RAINFALL |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/289396 |
专题 | 气候变化 |
作者单位 | 1.Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China; 2.Sun Yat Sen Univ, Guangdong Key Lab Urbanizat & Geosimulat, Guangzhou 510275, Peoples R China; 3.Chinese Univ Hong Kong, Inst Environm Energy & Sustainabil, Sha Tin, Hong Kong, Peoples R China; 4.Chinese Univ Hong Kong, Dept Geog & Resource Management, Sha Tin, Hong Kong, Peoples R China |
推荐引用方式 GB/T 7714 | Luo, Ming,Lau, Ngar-Cheung. Summer heat extremes in northern continents linked to developing ENSO events[J]. ENVIRONMENTAL RESEARCH LETTERS,2020,15(7). |
APA | Luo, Ming,&Lau, Ngar-Cheung.(2020).Summer heat extremes in northern continents linked to developing ENSO events.ENVIRONMENTAL RESEARCH LETTERS,15(7). |
MLA | Luo, Ming,et al."Summer heat extremes in northern continents linked to developing ENSO events".ENVIRONMENTAL RESEARCH LETTERS 15.7(2020). |
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