Fluctuations of satellite-derived chlorophyll concentrations and optical indices at the Southern Yellow Sea

Authors

  • Qianguo Xing Chinese Academy of Sciences, LCEP, Yantai Institute of Coastal Zone Research, Laishan District, Yantai 264003, China
  • Hubert Loisel Centre National de la Recherche Scientifique (CNRS), Laboratory of Oceanology and Geosciences, UMR 8187 LOG 62930, Wimereux, France
  • François G. Schmitt Centre National de la Recherche Scientifique (CNRS), Laboratory of Oceanology and Geosciences, UMR 8187 LOG 62930, Wimereux, France
  • David Dessailly Centre National de la Recherche Scientifique (CNRS), Laboratory of Oceanology and Geosciences, UMR 8187 LOG 62930, Wimereux, France
  • Yanju Hao Chinese Academy of Sciences, LCEP, Yantai Institute of Coastal Zone Research, Laishan District, Yantai 264003, China
  • Qiuying Han Chinese Academy of Sciences, LCEP, Yantai Institute of Coastal Zone Research, Laishan District, Yantai 264003, China
  • Ping Shi Chinese Academy of Sciences, LCEP, Yantai Institute of Coastal Zone Research, Laishan District, Yantai 264003, China

Keywords:

Chlorophyll-a concentration, particle back-scattering coefficients, particle size distribution

Abstract

Time series of chlorophyll-a concentration (chl a), backscattering coefficient at 490 nm (b bp(490)) and spectral slope of b bp (γ) derived from satellite imagery of ocean color were used to study the aquatic ecosystem of the Southern Yellow Sea during the time period of 1997–2007. Our study indicated that chl a increased in offshore waters by 0.02 mg m−3 y −1 (p < 0.05), in contrast to a decline observed in the middle and low-latitude global waters. b bp(490), a proxy of total suspended particulate matter concentration did not have any significant trend, while γ, a proxy of the relative proportion of small-sized and larger particles in the surface ocean, decreased significantly. Annual spring phytoplankton blooms occurred in nearshore and offshore waters of the central Southern Yellow Sea; while autumn blooms only occurred in nearshore waters.

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Published

2012-04-01

Issue

Vol. 15 No. 2 (2012): Linkages of lakes, rivers, estuaries and oceans: Asia-Pacific focus

Section

Research article

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