A preliminary study on the characteristics of marine nepheloid layers in the northern South China Sea and their influential factors

Zhang Xiaofei; Chen Jian; Xiang Lihui; Fang Jianyong; Li Dongyi; Zhu Yachao; Ou Yangkai; Fan Yanbin

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Article Navigation > Haiyang Xuebao > 2014 > 36(2): 51-65

Zhang Xiaofei, Chen Jian, Xiang Lihui, Fang Jianyong, Li Dongyi, Zhu Yachao, Ou Yangkai, Fan Yanbin. A preliminary study on the characteristics of marine nepheloid layers in the northern South China Sea and their influential factors[J]. Haiyang Xuebao, 2014, 36(2): 51-65.

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A preliminary study on the characteristics of marine nepheloid layers in the northern South China Sea and their influential factors

1.
Open Laboratory of Ocean and Coast Environmental Geology, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China;East China Geological & Mining Organization for Nonferrous Metals in Jiangsu Province, Nanjing 210007,China
2.
Open Laboratory of Ocean and Coast Environmental Geology, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
3.
East China Geological & Mining Organization for Nonferrous Metals in Jiangsu Province, Nanjing 210007,China

Received Date: 2013-02-01

Abstract

Abstract

Seven sections are studied in Yuedong(eastern Guangdong Province, China) upwelling area and the shelf-slope area of the northern South China Sea(NSCS). By analyzing the temperature, salinity, density, turbidity and chlorophyll concentration of seawater, and the mean grain size, volume concentration of suspended particles, the characteristics of the marine nepheloid layers in the NSCS and their influential factors are studied. The results show that the bottom nepheloid layer(BNL) develops widely in Yuedong upwelling area, and the surface nepheloid layer(SNL) exists at few sites. Particle matter in nepheloid layer is mainly from high energy coastal processes and bays, rivers in Guangdong Province.The BNL also develops widely in the shelf-slope area of the NSCS; the SNL often exists in the inner shelf off the Zhujiang River Estuary and the outer shelf-slope area; the intermediate nepheloid layer develops in the slope area. Particle matter in the nepheloid layer is mainly from the Zhujiang River and rivers in southwest Taiwan Island, seabed sediments and biogenous particle matter. The intensity and thickness of the BNL are mainly controlled by hydrodynamic conditions, dispersion of matter by river discharge, resuspension of fine deposites and so on.
- northern South China Sea,
- marine nepheloid layer,
- influencing factor

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