A quasi-synoptic interpretation of water mass distribution and circulation in the western North Pacific II: Circulation

Lingling Xie; Jiwei Tian; Dunxin Hu; Fan Wang

doi:10.1007/s00343-009-9240-x

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A quasi-synoptic interpretation of water mass distribution and circulation in the western North Pacific II: Circulation

Updated：2023-05-16

- A quasi-synoptic interpretation of water mass distribution and circulation in the western North Pacific II: Circulation
- Journal of Oceanology and Limnology Vol. 27, Issue 4, Pages: 955-965(2009)
- Affiliations：
  
  1. Physical Oceanography Laboratory Ocean University of China
  2. Institute of Oceanography Chinese Academia Science
- Author bio：
- Funds：
- DOI：10.1007/s00343-009-9240-x
  CLC：
- Online First：04 December 2009，
  
  Published：2009
- Accepted：
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Xie, L., Tian, J., Hu, D. et al. A quasi-synoptic interpretation of water mass distribution and circulation in the western North Pacific II: Circulation., Chin. J. Ocean. Limnol. 27, 955–965 (2009). https://doi.org/10.1007/s00343-009-9240-x
DOI：

Xie, L., Tian, J., Hu, D. et al. A quasi-synoptic interpretation of water mass distribution and circulation in the western North Pacific II: Circulation., Chin. J. Ocean. Limnol. 27, 955–965 (2009). https://doi.org/10.1007/s00343-009-9240-x DOI：

摘要

Abstract

Using the data of conductivity-temperature-depth (CTD) intensive observations conducted during Oct.–Nov. 2005

this study provides the first three-dimension quasi-synoptic description of the circulation in the western North Pacific. Several novel phenomena are revealed

especially in the deep ocean where earlier observations were very sparse. During the observations

the North Equatorial Current (NEC) splits at about 12°N near the sea surface. This bifurcation shifts northward with depth

reaching about 20°N at 1 000 m

and then remains nearly unchanged to as deep as 2 000 m. The Luzon Undercurrent (LUC)

emerging below the Kuroshio from about 21°N

intensifies southward

with its upper boundary surfacing around 12°N. From there

part of the LUC separates from the coast

while the rest continues southward to join the Mindanao Current (MC). The MC extends to 2 000 m near the coast

and appears to be closely related to the subsurface cyclonic eddies which overlap low-salinity water from the North Pacific. The Mindanao Undercurrent (MUC)

carrying waters from the South Pacific

shifts eastward upon approaching the Mindanao coast and eventually becomes part of the eastward undercurrent between 10°N and 12°N at 130°E. In the upper 2 000 dbar

the total westward transport across 130°E between 7.5°N and 18°N reaches 65.4 Sv (1 Sv = 10−6 m3s−1)

the northward transport across 18°N from Luzon coast to 130°E is up to 35.0 Sv

and the southward transport across 7.5°N from Mindanao coast to 130°E is 27.9 Sv.

关键词

Keywords

references

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