Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-016-3196-2 |
Asymmetry of the winter extra-tropical teleconnections in the Northern Hemisphere associated with two types of ENSO | |
Feng, Juan1; Chen, Wen1; Li, Yanjie2 | |
2017-04-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 48 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Asymmetric atmospheric responses to ENSO are revisited after dividing it into two types: eastern-Pacific (EP) and central-Pacific (CP) ENSO. The EP ENSO triggers two obvious asymmetric atmospheric teleconnections: One is the Pacific-North American-like teleconnection. Its asymmetry is characterized by weaker amplitudes during the EP La Nia than EP El Nio, which is caused by a much weaker EP La Nia tropical forcing and the resultant weaker extra-tropical vorticity forcing. The other is the Atlantic-Eurasian teleconnection with negative height anomalies in the subtropical Atlantic and Eurasia and positive anomalies in the high-latitude Atlantic and northeast Asia, which appears during the EP La Nia but not during the EP El Nio. The background state plays a vital role in this asymmetry. The EP La Nia-type basic state is more conducive to propagation of the wave rays into the Atlantic-Eurasian region compared to EP El Nio situation. In contrast, the CP ENSO yields an Arctic Oscillation-like teleconnection, presenting an appreciable asymmetry in the subtropical amplitudes that are stronger during the CP El Nio than during the CP La Nia. In this case, the distinct effects of the different background state on the equatorward wave rays are responsible for this asymmetry. Under the CP El Nio-type background state, the equatorward wave rays tend to be reflected at the latitudes where the zonal wind equals zero (U = 0), and then successfully captured by the subtropical westerly jet. However, under the CP La Nia-type background state, the equatorward wave rays disappear at U = 0 latitudes. |
英文关键词 | Eastern-Pacific ENSO Central-Pacific ENSO Asymmetry Teleconnection |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398926400004 |
WOS关键词 | EL-NINO MODOKI ; EXTRATROPICAL RESPONSE ; DIFFERENT IMPACTS ; WAVE-PROPAGATION ; PACIFIC RIM ; LA-NINA ; CLIMATE ; NONLINEARITY ; RAINFALL ; EASTERN |
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/35586 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, Ctr Monsoon Syst Res, POB 2718, Beijing 100029, Peoples R China; 2.Chinese Acad Sci, Inst Atmospher Phys, LASG, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Feng, Juan,Chen, Wen,Li, Yanjie. Asymmetry of the winter extra-tropical teleconnections in the Northern Hemisphere associated with two types of ENSO[J]. CLIMATE DYNAMICS,2017,48. |
APA | Feng, Juan,Chen, Wen,&Li, Yanjie.(2017).Asymmetry of the winter extra-tropical teleconnections in the Northern Hemisphere associated with two types of ENSO.CLIMATE DYNAMICS,48. |
MLA | Feng, Juan,et al."Asymmetry of the winter extra-tropical teleconnections in the Northern Hemisphere associated with two types of ENSO".CLIMATE DYNAMICS 48(2017). |
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