Current structure and its variation in the equatorial area of the western north Pacific Ocean

Guan Bingxian

doi:10.1007/BF02850411

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Current structure and its variation in the equatorial area of the western north Pacific Ocean

OriginalPaper | Updated：2023-05-16

- Current structure and its variation in the equatorial area of the western north Pacific Ocean
- Current structure and its variation in the equatorial area of the western north Pacific Ocean
- 海洋湖沼学报（英文） 1986年4卷第3期页码：239-255
- Affiliations：
  
  Institute of Oceanology Academia Sinica
- Author bio：
- Funds：
  
  Project supported by the Science Fund of the Chinese Academy of Sciences.;Contribution No. 1331 from the Inst. of Oceanol., Academia Sinica.
- DOI：10.1007/BF02850411
  中图分类号：
- 纸质出版：1986
- Accepted：
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Current structure and its variation in the equatorial area of the western north Pacific Ocean[J]. 海洋湖沼学报（英文）, 1986,4(3):239-255.

Bingxian, G. Current structure and its variation in the equatorial area of the western north Pacific Ocean., Chin. J. Ocean. Limnol. 4, 239–255 (1986). https://doi.org/10.1007/BF02850411
Current structure and its variation in the equatorial area of the western north Pacific Ocean[J]. 海洋湖沼学报（英文）, 1986,4(3):239-255. DOI： 10.1007/BF02850411.

Bingxian, G. Current structure and its variation in the equatorial area of the western north Pacific Ocean., Chin. J. Ocean. Limnol. 4, 239–255 (1986). https://doi.org/10.1007/BF02850411 DOI：

摘要

Abstract

Based on the current measurement data from the R/V Ryofu Maru of JMA in the equatorial area along 137°E (1972–83) and 155°E (1972–79) the structures of the zonal velocity of the Equatorial Undercurrent (EUC) and the North Equatorial Countercurrent (NECC) and their variations are systematically analyzed in detail. At 155°E

the current at the equator and 100–300 m depth was a typical eastward EUC

it intensified in 1973–75

i.e.

in the non-El Niño period. While the corresponding current at 137°E was mostly westward

and the origin of the EUC shifted to north of the equator around 0.5–1.5°N owing to the influence of the New Guinea Coast. The EUC origin disappeared in early July

1982. Comparing with the EUC disappearance at 159°W

the average speed of an eastward travelling wave would be∼1.1m/s. The velocity core of the NECC at 137°E generally shifted northward in winter and southward in summer

and was stronger in summer and weaker in winter. The fluctuations of the NECC were closely related to those of the wind stress curl over the region 2–10°N

160°E–150°W.

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references

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