IOCAS-IR  > 海洋环流与波动重点实验室
Interannual variations of North Equatorial Current transport in the Pacific Ocean during two types of El Nino
Wu Guoli1,2,3; Zhai Fangguo4; Hu Dunxin1
2016-05-01
Source PublicationCHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
Volume34Issue:3Pages:585-596
SubtypeArticle
AbstractInterannual variations of Pacific North Equatorial Current (NEC) transport during eastern-Pacific El Ninos (EP-El Ninos) and central-Pacific El Ninos (CP-El Ninos) are investigated by composite analysis with European Centre for Medium-Range Weather Forecast Ocean Analysis/Reanalysis System 3. During EP-El Nino, NEC transport shows significant positive anomalies from the developing to decay phases, with the largest anomalies around the mature phase. During CP-El Nino, however, the NEC transport only shows positive anomalies before the mature phase, with much weaker anomalies than those during EP-El Nino. The NEC transport variations are strongly associated with variations of the tropical gyre and wind forcing in the tropical North Pacific. During EP-El Nino, strong westerly wind anomalies and positive wind stress curl anomalies in the tropical North Pacific induce local upward Ekman pumping and westward-propagating upwelling Rossby waves in the ocean, lowering the sea surface height and generating a cyclonic gyre anomaly in the western tropical Pacific. During CP-El Nino, however, strength of the wind and associated Ekman pumping velocity are very weak. Negative sea surface height and cyclonic flow anomalies are slightly north of those during EP-El Nino.
KeywordNorth Equatorial Current Transport Interannual Variation El Nino
DOI10.1007/s00343-015-4352-y
Indexed BySCI
Language英语
WOS IDWOS:000375677600019
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/131047
Collection海洋环流与波动重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.China Univ Petr, Coll Sci, Qingdao 266580, Peoples R China
4.Ocean Univ China, Coll Ocean & Atmospher Sci, Qingdao 266100, Peoples R China
Recommended Citation
GB/T 7714
Wu Guoli,Zhai Fangguo,Hu Dunxin. Interannual variations of North Equatorial Current transport in the Pacific Ocean during two types of El Nino[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2016,34(3):585-596.
APA Wu Guoli,Zhai Fangguo,&Hu Dunxin.(2016).Interannual variations of North Equatorial Current transport in the Pacific Ocean during two types of El Nino.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,34(3),585-596.
MLA Wu Guoli,et al."Interannual variations of North Equatorial Current transport in the Pacific Ocean during two types of El Nino".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 34.3(2016):585-596.
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