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Spatial-Temporal Variations of Chlorophyll-a in the Adjacent Sea Area of the Yangtze River Estuary Influenced by Yangtze River Discharge

Author

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  • Ying Wang

    (Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Xianlin Road 163, Nanjing 210023, China
    International Institute for Earth System Science, Nanjing University, Xianlin Road 163, Nanjing 210023, China)

  • Hong Jiang

    (Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Xianlin Road 163, Nanjing 210023, China
    International Institute for Earth System Science, Nanjing University, Xianlin Road 163, Nanjing 210023, China)

  • Jiaxin Jin

    (Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Xianlin Road 163, Nanjing 210023, China
    International Institute for Earth System Science, Nanjing University, Xianlin Road 163, Nanjing 210023, China)

  • Xiuying Zhang

    (Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Xianlin Road 163, Nanjing 210023, China
    International Institute for Earth System Science, Nanjing University, Xianlin Road 163, Nanjing 210023, China)

  • Xuehe Lu

    (Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Xianlin Road 163, Nanjing 210023, China
    International Institute for Earth System Science, Nanjing University, Xianlin Road 163, Nanjing 210023, China)

  • Yueqi Wang

    (Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China)

Abstract

Carrying abundant nutrition, terrigenous freshwater has a great impact on the spatial and temporal heterogeneity of phytoplankton in coastal waters. The present study analyzed the spatial-temporal variations of Chlorophyll-a (Chl-a) concentration under the influence of discharge from the Yangtze River, based on remotely sensed Chl-a concentrations. The study area was initially zoned to quantitatively investigate the spatial variation patterns of Chl-a. Then, the temporal variation of Chl-a in each zone was simulated by a sinusoidal curve model. The results showed that in the inshore waters, the terrigenous discharge was the predominant driving force determining the pattern of Chl-a, which brings the risk of red tide disasters; while in the open sea areas, Chl-a was mainly affected by meteorological factors. Furthermore, a diversity of spatial and temporal variations of Chl-a existed based on the degree of influences from discharge. The diluted water extended from inshore to the east of Jeju Island. This process affected the Chl-a concentration flowing through the area, and had a potential impact on the marine environment. The Chl-a from September to November showed an obvious response to the discharge from July to September with a lag of 1 to 2 months.

Suggested Citation

  • Ying Wang & Hong Jiang & Jiaxin Jin & Xiuying Zhang & Xuehe Lu & Yueqi Wang, 2015. "Spatial-Temporal Variations of Chlorophyll-a in the Adjacent Sea Area of the Yangtze River Estuary Influenced by Yangtze River Discharge," IJERPH, MDPI, vol. 12(5), pages 1-19, May.
    • Handle: RePEc:gam:jijerp:v:12:y:2015:i:5:p:5420-5438:d:49845
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    1. Kim, Jaehoon & Kim, Sangsin, 2015. "2012년 국회법 개정의 효과 연구 [A Study on the Effect of the 2012 National Assembly Act Amendment]," KDI Research Monographs, Korea Development Institute (KDI), volume 127, number v:2015-03(k):y:2015:p:1-1.
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    1. Wang Tian & Huayong Zhang & Lei Zhao & Xiang Xu & Hai Huang, 2016. "The Relationship between Phytoplankton Evenness and Copepod Abundance in Lake Nansihu, China," IJERPH, MDPI, vol. 13(9), pages 1-15, August.

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