Observation of the abyssal western boundary current in the Philippine Sea

Fangguo Zhai; Qingye Wang; Dunxin Hu; Xiaogang Guo

doi:10.1007/s00343-014-3339-4

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Observation of the abyssal western boundary current in the Philippine Sea

OriginalPaper | Updated：2023-05-16

- Observation of the abyssal western boundary current in the Philippine Sea
- Observation of the abyssal western boundary current in the Philippine Sea
- 海洋湖沼学报（英文） 2014年32卷第5期页码：1188-1197
- Affiliations：
  
  1. Third Institute of Oceanography State Oceanic Administration
  2. Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of Sciences
- Author bio：
- Funds：
  
  Supported by the China Postdoctoral Science Foundation (No. 2013M530331) and the Project of State Strategic Program of Global Change (No. 2013CB956202)
- DOI：10.1007/s00343-014-3339-4
  中图分类号：
- 网络首发：2014-07-11，
  
  纸质出版：2014
- Accepted：
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Observation of the abyssal western boundary current in the Philippine Sea[J]. 海洋湖沼学报（英文）, 2014,32(5):1188-1197.

Zhai, F., Wang, Q., Hu, D. et al. Observation of the abyssal western boundary current in the Philippine Sea., Chin. J. Ocean. Limnol. 32, 1188–1197 (2014). https://doi.org/10.1007/s00343-014-3339-4
Observation of the abyssal western boundary current in the Philippine Sea[J]. 海洋湖沼学报（英文）, 2014,32(5):1188-1197. DOI： 10.1007/s00343-014-3339-4.

Zhai, F., Wang, Q., Hu, D. et al. Observation of the abyssal western boundary current in the Philippine Sea., Chin. J. Ocean. Limnol. 32, 1188–1197 (2014). https://doi.org/10.1007/s00343-014-3339-4 DOI：

摘要

Abstract

Mooring observations were conducted from July 16

2011 to March 30

2012 east of Mindanao

Philippines (127°2.8′E

8°0.3′N) to observe the abyssal current at about 5 600 m deep and 500 m above the ocean bottom. Several features were revealed: 1) the observed abyssal current was highly variable with standard deviations of 57.3 mm/s and 34.0 mm/s

larger than the mean values of -31.9 and 16.6 mm/s for the zonal and meridional components

respectively; 2) low-frequency current longer than 6 days exhibited strong seasonal variation

flowing southeastward (mean flow direction of 119.0° clockwise from north) before about October 1

2011 and northwestward (mean flow direction of 60.5° counter-clockwise from north) thereafter; 3) the high-frequency flow bands were dominated by tidal currents O1

and S2

and near-inertial currents

whose frequencies were higher than the local inertial frequency. The two diurnal tidal constituents were much stronger than the two semidiurnal ones. This study provides for the first time an observational insight into the abyssal western boundary current east of Mindanao based on long-term observations at one site. It is meaningful for further research into the deep and abyssal circulation over the whole Philippine Sea and the 3D structure of the western boundary current system in this region. More observational and high-resolution model studies are needed to examine the spatial structure and temporal variation of the abyssal current over a much larger space and longer period

their relation to the upper-layer circulation

and the underlying dynamics.

关键词

Keywords

references

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