Volume 12 Issue 4
Aug.  2016
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YU Jie, CHEN Guobao, ZHANG Kui, CHEN Zuozhi. Vertical distribution of summer chlorophyll a concentration in the middle South China Sea[J]. South China Fisheries Science, 2016, 12(4): 1-8. DOI: 10.3969/j.issn.2095-0780.2016.04.001
Citation: YU Jie, CHEN Guobao, ZHANG Kui, CHEN Zuozhi. Vertical distribution of summer chlorophyll a concentration in the middle South China Sea[J]. South China Fisheries Science, 2016, 12(4): 1-8. DOI: 10.3969/j.issn.2095-0780.2016.04.001
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Vertical distribution of summer chlorophyll a concentration in the middle South China Sea

  • Key Lab. of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture; Scientific Observing and Experimental Station of South China Sea Fishery Resources & Environments, Ministry of Agriculture; South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China

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  • Received Date: January 26, 2016
  • Revised Date: March 24, 2016
    Graphical Abstract
    • Abstract

  • We investigated the chlorophyll a (Chl-a) concentration in the middle South China Sea (12°N~18°N, 110°E~117°E) in July and August 2014 to provide valuable data for the study of vertical distribution of Chl-a. The results show that: 1) Chl-a in the middle South China Sea increased first and then decreased in depth. High concentration accumulated in depth of 30~70 m. 2) At subsurface layer, the maximum of Chl-a (SCM) intensity varied from 0.94 mg·m-3to 4.69 mg·m-3 with an average of 1.90 mg·m-3, which was 18.10 times compared with satellite surface Chl-a. SCM depth varied from 4 m to 75.36 m. SCM thickness varied from 19.01 m to 80.36 m. 3) The upwelling had great effect on the vertical distribution of Chl-a according to the distribution characteristics in Transect A and B. Coastal upwelling in Transect A showed the greatest intensity, smallest depth and largest thickness of SCM, while Zhongsha Islands upwelling in Transect B showed the greatest intensity, smallest depth and thickness.

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