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DOI | 10.1007/s00382-019-04732-1 |
Mechanisms causing east Australian spring rainfall differences between three strong El Nino events | |
van Rensch, Peter1,2,3; Arblaster, Julie1,4,5; Gallant, Ailie J. E.1,3; Cai, Wenju2; Nicholls, Neville1; Durack, Paul J.6 | |
2019-09-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53页码:3641-3659 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; USA |
英文摘要 | Strong El Nino events have had significant impacts on society through their association with extreme events, such as droughts and floods. However, questions remain as to the robustness of strong El Nino events in forcing regional climate variability. The strong 1982, 1997 and 2015 El Nino events were of similar type and strength, but in eastern Australia they were associated with differing spring rainfall anomaly magnitudes and patterns. To understand these differences, we first determined the most important processes for teleconnecting the El Nino signal to east Australian spring rainfall using historical relationships with winds and sea level pressure. Then, using a 60-member atmospheric model ensemble, we estimated the influence of sea surface temperatures (SSTs) on Australian atmospheric circulation and rainfall during these three El Nino events relative to internal variability. We found that the different east Australian spring rainfall anomalies for each of the three El Nino events are best explained by differences in the strength of the meridional wind component of the regional circulation. All three El Nino events exhibited a positive sea level pressure anomaly to the south of Australia, which was associated with rainfall deficits along the southeast Australian coast. The experiments indicate the regional atmospheric circulation and rainfall differences were forced by SSTs during spring of 1982 and 1997, with their influence on the circulation in 2015 remaining unclear. We also show that SSTs adjacent to Australia further contributed to the modelled rainfall differences mainly by regulating moisture availability. |
英文关键词 | 1982-1983 1997-1998 2015-2016 Precipitation Extreme El Nino Super El Nino Climate variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000483626900067 |
WOS关键词 | SOUTHERN ANNULAR MODE ; ENSO ; VARIABILITY ; CLIMATE ; OSCILLATION ; PRECIPITATION ; FREQUENCY ; TRENDS ; IMPACT |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/186395 |
专题 | 气候变化 |
作者单位 | 1.Monash Univ, Earth Atmosphere & Environm, Clayton, Vic, Australia; 2.CSIRO, Aspendale, Vic, Australia; 3.Monash Univ, ARC Ctr Excellence Climate Syst Sci, Clayton, Vic, Australia; 4.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA; 5.Monash Univ, ARC Ctr Excellence Climate Extremes, Clayton, Vic, Australia; 6.Lawrence Livermore Natl Lab, Program Climate Model Diag & Intercomparison, 7000 East Ave, Livermore, CA 94550 USA |
推荐引用方式 GB/T 7714 | van Rensch, Peter,Arblaster, Julie,Gallant, Ailie J. E.,et al. Mechanisms causing east Australian spring rainfall differences between three strong El Nino events[J]. CLIMATE DYNAMICS,2019,53:3641-3659. |
APA | van Rensch, Peter,Arblaster, Julie,Gallant, Ailie J. E.,Cai, Wenju,Nicholls, Neville,&Durack, Paul J..(2019).Mechanisms causing east Australian spring rainfall differences between three strong El Nino events.CLIMATE DYNAMICS,53,3641-3659. |
MLA | van Rensch, Peter,et al."Mechanisms causing east Australian spring rainfall differences between three strong El Nino events".CLIMATE DYNAMICS 53(2019):3641-3659. |
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