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DOI | 10.1007/s00382-016-3432-9 |
Asymmetry in summertime atmospheric circulation anomalies over the northwest Pacific during decaying phase of El Nio and La Nina | |
Tao, Weichen1,4; Huang, Gang1,2; Wu, Renguang1,3; Hu, Kaiming1,2,3; Wang, Pengfei1,3; Chen, Dong5 | |
2017-09-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 49 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The present study has revealed the asymmetric characteristics of summertime atmospheric circulation anomalies over the Indo-Pacific for El Nio and La Nia, as well as the possible mechanism. During the summer when El Nio has dissipated, there are basin-wide warming over the tropical Indian Ocean (TIO) and cooling over the equatorial central and eastern Pacific (CEP). The northwest Pacific (NWP) anticyclone is maintained by a combined effect of the TIO warming and equatorial CEP cooling. The impact of TIO warming is via the Kelvin wave-induced divergence mechanism, and the effect of CEP cooling is by stimulating a Rossby wave response to its northwest. Correspondingly, there are lower (upper) level convergence (divergence) over the TIO and divergence (convergence) over the NWP. The tropical atmospheric waves and large-scale circulation anomalies could couple together and maintain the anticyclone. However, for La Nia, there are easterly wind anomalies over the equatorial western Pacific, and the anomalous NWP cyclone (NWPC) is weak and shifts northwestward, which are largely different from El Nio. The equatorial CEP cooling plays a dominant role in the maintenance of NWPC. The negative rainfall anomalies induced by CEP cooling force the anticyclonic wind anomalies over the WP as a Rossby wave response, which further cause the lower (upper) level convergence (divergence) over the MC and NWP. The resultant convergence leads to the enhanced convection there, inducing the NWPC as a Rossby wave response. Besides, the equatorial easterly wind anomalies trigger the upwelling oceanic Kelvin wave and maintain the CEP cooling as the Bjerknes feedback. |
英文关键词 | Asymmetry ENSO El Nino and La Nina Northwest Pacific circulation Central and eastern Pacific cooling |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000408718200029 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; INDO-WESTERN PACIFIC ; EAST-ASIAN CLIMATE ; INDIAN-OCEAN ; SST ANOMALIES ; INTERDECADAL VARIATIONS ; PART II ; ENSO ; MONSOON ; VARIABILITY |
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/35707 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China; 2.Joint Ctr Global Change Studies, Beijing 100875, Peoples R China; 3.Chinese Acad Sci, Inst Atmospher Phys, Ctr Monsoon Syst Res, Beijing 100029, Peoples R China; 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 5.Chengdu Univ Informat Technol, Chengdu 610225, Sichuan, Peoples R China |
推荐引用方式 GB/T 7714 | Tao, Weichen,Huang, Gang,Wu, Renguang,et al. Asymmetry in summertime atmospheric circulation anomalies over the northwest Pacific during decaying phase of El Nio and La Nina[J]. CLIMATE DYNAMICS,2017,49. |
APA | Tao, Weichen,Huang, Gang,Wu, Renguang,Hu, Kaiming,Wang, Pengfei,&Chen, Dong.(2017).Asymmetry in summertime atmospheric circulation anomalies over the northwest Pacific during decaying phase of El Nio and La Nina.CLIMATE DYNAMICS,49. |
MLA | Tao, Weichen,et al."Asymmetry in summertime atmospheric circulation anomalies over the northwest Pacific during decaying phase of El Nio and La Nina".CLIMATE DYNAMICS 49(2017). |
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