Vertical structure and evolution of the Luzon Warm Eddy

Gengxin Chen; Yijun Hou; Xiaoqing Chu; Peng Qi

doi:10.1007/s00343-010-9040-3

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Vertical structure and evolution of the Luzon Warm Eddy

Updated：2023-05-16

- Vertical structure and evolution of the Luzon Warm Eddy
- Journal of Oceanology and Limnology Vol. 28, Issue 5, Pages: 955-961(2010)
- Affiliations：
  
  1. Institute of Oceanology Chinese Academy of Sciences
  2. Key Laboratory of Ocean Circulation and Waves (KLOCAW) Chinese Academy of Sciences
  3. Graduate University of Chinese Academy of Sciences
- Author bio：
- Funds：
- DOI：10.1007/s00343-010-9040-3
  CLC：
- Online First：11 September 2010，
  
  Published：2010
- Accepted：
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Chen, G., Hou, Y., Chu, X. et al. Vertical structure and evolution of the Luzon Warm Eddy., Chin. J. Ocean. Limnol. 28, 955–961 (2010). https://doi.org/10.1007/s00343-010-9040-3
DOI：

Chen, G., Hou, Y., Chu, X. et al. Vertical structure and evolution of the Luzon Warm Eddy., Chin. J. Ocean. Limnol. 28, 955–961 (2010). https://doi.org/10.1007/s00343-010-9040-3 DOI：

摘要

Abstract

Eddies are frequently observed in the northeastern South China Sea (SCS). However

there have been few studies on vertical structure and temporal-spatial evolution of these eddies. We analyzed the seasonal Luzon Warm Eddy (LWE) based on Argo float data and the merged data products of satellite altimeters of Topex/Poseidon

Jason-1 and European Research Satellites. The analysis shows that the LWE extends vertically to more than 500 m water depth

with a higher temperature anomaly of 5°C and lower salinity anomaly of 0.5 near the thermocline. The current speeds of the LWE are stronger in its uppermost 200 m

with a maximum speed of 0.6 m/s. Sometimes the LWE incorporates mixed waters from the Kuroshio Current and the SCS

and thus has higher thermohaline characteristics than local marine waters. Time series of eddy kinematic parameters show that the radii and shape of the LWE vary during propagation

and its eddy kinetic energy follows a normal distribution. In addition

we used the empirical orthogonal function (EOF) here to analyze seasonal characteristics of the LWE. The results suggest that the LWE generally forms in July

intensifies in August and September

separates from the coast of Luzon in October and propagates westward

and weakens in December and disappears in February. The LWE’s westward migration is approximately along 19°N latitude from northwest of Luzon to southeast of Hainan

with a mean speed of 6.6 cm/s.

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Keywords

references

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