Science China Earth Sciences

, Volume 53, Issue 3, pp 432–440

Meso-scale circulation at the intermediate-depth east of Mindanao observed by Argo profiling floats

  • Hui Zhou
  • DongLiang Yuan
  • PeiFang Guo
  • MaoChong Shi
  • QiLong Zhang
Research Paper

Abstract

The meso-scale circulation at the intermediate depth east of Mindanao is studied using Argo profiling floats observations. The trajectories and the parking-depth velocities of Argo floats show that the intermediate-depth circulation east of Mindanao contains significant meso-scale features that are highly variable both in space and in time. Both cyclonic and anticyclonic eddies at the intermediate depth (1000–2000 m) are indicated by the trajectories east of Mindanao. The mean tangential velocities of these eddies are about 10 cm/s at 2000 m and over 20 cm/s at 1000 m, which indicates that the geostrophic calculation may contain large errors due to the vigorous eddy activity at the reference levels. The analyses also suggest that these eddies might play an important role in mass and vorticity balances of the intermediate-depth circulation east of Mindanao.

Keywords

Mindanao Current intermediate-depth circulation meso-scale eddy Argo profiling float 

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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Hui Zhou
    • 1
  • DongLiang Yuan
    • 1
  • PeiFang Guo
    • 2
  • MaoChong Shi
    • 2
  • QiLong Zhang
  1. 1.Key Laboratory of Ocean Circulation and Wave StudiesChinese Academy of SciencesQingdaoChina
  2. 2.Physical Oceanography LaboratoryOcean University of ChinaQingdaoChina

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