Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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The Distribution and Interannual Variation in Suspended Solid and Particulate Organic Carbon in the Northern East China Sea

동중국해 북부해역에서 부유물질과 입자성유기탄소의 분포 특성 및 연간 변화

  • 김동선 (한국해양연구원 기후.연안재해연구부) ;
  • 최상화 (한국해양연구원 해양자료팀) ;
  • 김경희 (한국해양연구원 기후.연안재해연구부) ;
  • 김철호 (한국해양연구원 기후.연안재해연구부)
  • Published : 2009.06.30
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Abstract

In order to establish annual variations in the marine ecosystem of the East China Sea, suspended solids (SSs) and particulate organic carbon (POC) were extensively investigated in the northern part of the East China Sea from August 2003 to April 2008. Surface SS concentrations showed large spatial variations in spring and fall, but not in summer. Surface SS concentrations in spring were lower than those in summer and fall. In summer, SSs discharged from Changjiang were mostly deposited in the coastal areas and did not reach our study area which was located about 260 km from the river mouth. High SS concentrations were observed near the bottom, which resulted from resuspension of bottom sediments by the bottom currents. Surface POC concentrations did not exhibited large seasonal variations. Phytoplankton biomass was a main factor controlling surface POC concentrations. POC/chlorophyll ratios showed large seasonal variations, with maximum numbers in summer. POC/PON ratios were higher in summer than the Redefied ratio (6.6), while they were lower in spring and fall. In summer, higher POC/chlorophyll and POC/PON ratios were probably attributed to the high phytoplankton mortality caused by nutrient depletion in surface waters.

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References

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