The influence of turbulent mixing on the subsurface chlorophyll maximum layer in the northern South China Sea

Chenjing SHANG; Changrong LIANG; Guiying CHEN; Yongli GAO

doi:10.1007/s00343-020-0313-1

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The influence of turbulent mixing on the subsurface chlorophyll maximum layer in the northern South China Sea

Physics | Updated：2023-05-20

- The influence of turbulent mixing on the subsurface chlorophyll maximum layer in the northern South China Sea
- Journal of Oceanology and Limnology Vol. 39, Issue 6, Pages: 2167-2180(2021)
- Affiliations：
  
  1.Shenzhen Key Laboratory of Marine Bioresources and Eco-environmental Science, College of Life Science and Oceanography, Shenzhen University, Shenzhen 518060, China
  2.State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
  3.Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou), Guangzhou 511458, China
  4.Equipment Public Service Center, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
- Author bio：
  
  Changrong LIANG, E-mail: crliang@scsio.ac.cn
- Funds：
- DOI：10.1007/s00343-020-0313-1
  CLC：
- Received：21 August 2020，
  
  Accepted：09 October 2020，
  
  Online First：20 November 2020，
  
  Published：2021-11
- Accepted：
Scan QR Code
Chenjing SHANG, Changrong LIANG, Guiying CHEN, et al. The influence of turbulent mixing on the subsurface chlorophyll maximum layer in the northern South China Sea[J]. Journal of Oceanology and Limnology, 2021, 39(6): 2167-2180.
DOI：

Chenjing SHANG, Changrong LIANG, Guiying CHEN, et al. The influence of turbulent mixing on the subsurface chlorophyll maximum layer in the northern South China Sea[J]. Journal of Oceanology and Limnology, 2021, 39(6): 2167-2180. DOI： 10.1007/s00343-020-0313-1.

摘要

Abstract

We present observations from deployments of turbulent microstructure instrument and CTD package in the northern South China Sea from April to May 2010. From them we determined the turbulent mixing (dissipation rate

and diapycnal diffusivity

)

nutrients (phosphate

nitrate

and nitrite)

nutrient fluxes

and chlorophyll

in two transects (A and B). Transect A was located in the region where turbulent mixing in the upper 100 m was weak (

~10

-6

–10

-4

/s). Transect B was located in the region where the turbulent mixing in the upper 100 m was strong (

~10

-5

–10

-3

/s) due to the influence of internal waves originating from the Luzon Strait and water intrusion from the Western Pacific. In both transects

there was a thin subsurface chlorophyll maximum layer (SCML) (

0.25 mg/m

) nested in the upper 100 m. The observations indicate that the effects of turbulent mixing on the distributions of nutrients and chlorophyll

were different in the two transects. In the transect A with weak turbulent mixing

nutrient fluxes induced by turbulent mixing transported nutrients to the SCML but not to the upper water. Nutrients were sufficient to support a local SCML phytoplankton population and the SCML remained compact. In the transect B with strong turbulent mixing

nutrient fluxes induced by turbulent mixing transported nutrients not only to the SCML but also to the upper water

which scatters the nutrients in the water column and diffuses the SCML.

关键词

Keywords

references

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