Effects of multiple dynamic processes on chlorophyll variation in the Luzon Strait in summer 2019 based on glider observation

Xiangpeng WANG; Yan DU; Yuhong ZHANG; Tianyu WANG

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Effects of multiple dynamic processes on chlorophyll variation in the Luzon Strait in summer 2019 based on glider observation

Marine ecological environment and its response to marine dynamic processesin the South China Sea | Updated：2024-10-12

- Effects of multiple dynamic processes on chlorophyll variation in the Luzon Strait in summer 2019 based on glider observation
- Effects of multiple dynamic processes on chlorophyll variation in the Luzon Strait in summer 2019 based on glider observation
- 海洋湖沼学报(英文) 2023年41卷第2期页码：469-481
- Affiliations：
  
  1.State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
  2.College of Marine Science, University of Chinese Academy of Sciences, Beijing 100049, China
  3.Guangdong Key Laboratory of Ocean Remote Sensing, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
- Author bio：
  
  zhangyuhong@scsio.ac.cn
  wangty@scsio.ac.cn
- Funds：
  
  the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)(2019BT02H594);the Chinese Academy of Sciences(XDB42010305;XDA15020901;133244KYSB20190031;SCSIO202201;SCSIO202204);the National Natural Science Foundation of China(41976024);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA13010500);the Independent Research Project Program of State Key Laboratory of Tropical Oceanography(LTOZZ2101)
- DOI：
  中图分类号：
- 收稿：2021-12-11，
  
  纸质出版：2023-03-01
- Accepted：
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Effects of multiple dynamic processes on chlorophyll variation in the Luzon Strait in summer 2019 based on glider observation[J]. 海洋湖沼学报(英文), 2023,41(2):469-481.

WANG Xiangpeng,DU Yan,ZHANG Yuhong,et al.Effects of multiple dynamic processes on chlorophyll variation in the Luzon Strait in summer 2019 based on glider observation[J].Journal of Oceanology and Limnology,2023,41(02):469-481.
Effects of multiple dynamic processes on chlorophyll variation in the Luzon Strait in summer 2019 based on glider observation[J]. 海洋湖沼学报(英文), 2023,41(2):469-481. DOI：

WANG Xiangpeng,DU Yan,ZHANG Yuhong,et al.Effects of multiple dynamic processes on chlorophyll variation in the Luzon Strait in summer 2019 based on glider observation[J].Journal of Oceanology and Limnology,2023,41(02):469-481. DOI：

摘要

Abstract

Luzon Strait is the main channel connecting the South China Sea (SCS) and the western Pacific

with complex atmospheric and oceanic dynamic processes. Based on 44 days of glider measurements and satellite observations

we investigated the temporal and vertical variations of chlorophyll-

(Chl-

) concentration in the Luzon Strait from July 25 to September 6

2019. The Chl

was mainly distributed above 200 m and concentrated in the subsurface chlorophyll maximum (SCM) layer. The depth of SCM ranged between 50 m and 110 m

and the magnitude of SCM varied from 0.42 mg/m

to 1.12 mg/m

. The variation of Chl

was identified with three stages responding to different dynamic processes. Under the influence of Kuroshio intrusion

the SCM depth sharply deepened

and its magnitude decreased in Stage 1. Afterward

a prominent Chl-

bloom was observed in the SCM layer from August 6 to August 16. The Chl-

bloom in Stage 2 was related to the influence of a cyclonic eddy

which uplifted of the thermocline and thus the deep nutrients. During Stage 3

prolonged heavy rainfall in the northeastern SCS resulted in a significant salinity decrease in the upper ocean. The convergence of upper water deepened the thermocline and the mixed layer. Thus

the Chl

decreased in the SCM layer but increased in the surface layer. In particular

a typhoon passed through the Luzon Strait on August 24

which induced the Chl

increase in the upper 50 m. However

there was little change in the depth-integrated Chl

(0‍‍‍–‍200 m)

indicating that the Chl

increase in the surf

ace layer was likely associated with physical entrainment of SCM caused by strong mixing

rather than the phytoplankton bloom in the upper water column. Underwater gliders provide frequent autonomous observations that help us understand the regional ocean’s complex dynamic processes and biological responses.

关键词

Keywords

references

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