Interannual variations of North Equatorial Current transport in the Pacific Ocean during two types of El Niño

Guoli Wu; Fangguo Zhai; Dunxin Hu

doi:10.1007/s00343-015-4352-y

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Interannual variations of North Equatorial Current transport in the Pacific Ocean during two types of El Niño

OriginalPaper | Updated：2023-05-16

- Interannual variations of North Equatorial Current transport in the Pacific Ocean during two types of El Niño
- Interannual variations of North Equatorial Current transport in the Pacific Ocean during two types of El Niño
- 海洋湖沼学报（英文） 2016年34卷第3期页码：585-596
- Affiliations：
  
  1. Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences
  2. University of Chinese Academy of Sciences
  3. College of Science China University of Petroleum
  4. College of Oceanic and Atmospheric Sciences Ocean University of China
- Author bio：
- Funds：
  
  Supported by the National Basic Research Program of China (973 Program) (Nos. 2012CB417401, 2013CB956202), the Key Project of National Natural Science Foundation of China (No. 41330963), and the Fundamental Research Funds for the Central Universities (No. 201513030)
- DOI：10.1007/s00343-015-4352-y
  中图分类号：
- 网络首发：2015-10-21，
  
  纸质出版：2016
- Accepted：
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Interannual variations of North Equatorial Current transport in the Pacific Ocean during two types of El Niño[J]. 海洋湖沼学报（英文）, 2016,34(3):585-596.

Wu, G., Zhai, F. & Hu, D. Interannual variations of North Equatorial Current transport in the Pacific Ocean during two types of El Niño., Chin. J. Ocean. Limnol. 34, 585–596 (2016). https://doi.org/10.1007/s00343-015-4352-y
Interannual variations of North Equatorial Current transport in the Pacific Ocean during two types of El Niño[J]. 海洋湖沼学报（英文）, 2016,34(3):585-596. DOI： 10.1007/s00343-015-4352-y.

Wu, G., Zhai, F. & Hu, D. Interannual variations of North Equatorial Current transport in the Pacific Ocean during two types of El Niño., Chin. J. Ocean. Limnol. 34, 585–596 (2016). https://doi.org/10.1007/s00343-015-4352-y DOI：

摘要

Abstract

Interannual variations of Pacific North Equatorial Current (NEC) transport during eastern-Pacific El Niños (EP-El Niños) and central-Pacific El Niños (CP-El Niños) are investigated by composite analysis with European Centre for Medium-Range Weather Forecast Ocean Analysis/Reanalysis System 3. During EP-El Niño

NEC transport shows significant positive anomalies from the developing to decay phases

with the largest anomalies around the mature phase. During CP-El Niño

however

the NEC transport only shows positive anomalies before the mature phase

with much weaker anomalies than those during EP-El Niño. The NEC transport variations are strongly associated with variations of the tropical gyre and wind forcing in the tropical North Pacific. During EP-El Niño

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 Niño

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 Niño.

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references

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