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The Physical Environments and Cochlodinium polykrikoides Bloom in the Sea near Naro-Do

  • Lee, Dong-Kyu (Department of Marine Sciences and Marine Research Institute, Busan National University) ;
  • Kang, Yoon-Hyang (Department of Marine Sciences and Marine Research Institute, Busan National University)
  • Published : 2003.09.30

Abstract

The initiation of Cochlodinium polykrikoides blooming in the South Sea of Korea occurs in the sea near Naro-Do in late August. In this paper, the relationships of this annual occurrence with the environmental conditions are presented. In early summer, the winds in the sea near Naro-Do are southwesterly and the upwelling occurs in the near-shore area. The favorable winds to the upwelling are relaxed in August and the downwelling favorable northeasterly winds set in around late August. The change of wind direction causes the onshore transport of warm-and-fresh off-shore water into the sea near Naro-Do and a front between near-shore water and off·shore water is formed. Along the front, downwelling occurs and the environmental conditions for the diatom become unfavorable. When the typhoon and storm bring well-mixed East China Sea water into the sea near Naro-Do in September, the conditions for the dinoflagellates become unfavorable and blooming of C. polykrikoides disappears.

Keywords

References

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