Ocean and Polar Research

  • 제27권1호
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  • Pages.1-13
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  • 2005
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  • 1598-141X(pISSN)
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  • 2234-7313(eISSN)
한국해양과학기술원 (Korea Institute of Ocean Science & Technology)
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북동태평양 KODOS 해역의 유기탄소 및 겉보기산소량 특성

Characteristics of Organic Carbon and Apparent Oxygen Utilization in the NE Pacific KODOS Area

  • 손주원 (한국해양연구원 해저환경.자원연구본부) ;
  • 손승규 (한국해양연구원 해저환경.자원연구본부) ;
  • 김경홍 (한국해양연구원 해저환경.자원연구본부) ;
  • 김기현 (한국해양연구원 해저환경.자원연구본부) ;
  • 박용철 (인하대학교 이과대학 해양과학과) ;
  • 김동화 (인하대학교 이과대학 해양과학과) ;
  • 김태하 (인하대학교 이과대학 해양과학과)
  • Son, Ju-Won (Marine Geoenvironment and Resources Research Division, KORDI) ;
  • Son, Seung-Kyu (Marine Geoenvironment and Resources Research Division, KORDI) ;
  • Kim, Kyeong-Hong (Marine Geoenvironment and Resources Research Division, KORDI) ;
  • Kim, Ki-Hyune (Marine Geoenvironment and Resources Research Division, KORDI) ;
  • Park, Yong-Chul (Department of Oceanography, College of Natural Science Inha University) ;
  • Kim, Dong-Hwa (Department of Oceanography, College of Natural Science Inha University) ;
  • Kim, Tae-Ha (Department of Oceanography, College of Natural Science Inha University)
  • 발행 : 2005.03.31
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초록

The samples for organic carbon analysis were collected between $5^{\circ}\;and\;17^{\circ}N$ along $131.5^{\circ}W$ in the northeast Pacific KODOS (Korea Deep Ocean Study) area. The mean concentration of total organic carbon (TOC) in the surface mixed layer $({\sim}50 m)$ was $100.13{\pm}2.05{\mu}M-C$, while the mean concentration of TOC in the lower 500m of the water column was $50.19{\pm}4.23{\mu}M-C$. A strong linear regression between TOC and temperature $(r^2=0.70)$ showed that TOC distribution was controlled by physical process. Results from the linear regression between chlorophyll-a and TOC, and between chlorophyll-a and particulate organic carbon (POC), decreasing of dissolved organic carbon (DOC) in the surface layer caused by non-biological photo-oxidation process. Below the surface layer, biological production and consumption occurred. DOC accumulation dominated in the depth range of $30{\sim}50m$ and DOC consumption occurred in the depth range of $50{\sim}200m$. TOC was inversely correlated with apparent oxygen utilization (AOU) and TOC/AOU molar ratios ranged from -0.077 to -0.21. These ratios indicated that TOC oxidation was responsible fur $10.9{\sim}30.1%$ (mean 20.2%) of oxygen consumption in the NE Pacific KODOS area. In the euphotic zone, distributions of dissolved and particulate organic matter were controlled by photo-chemical, chemical, biological and physical processes.

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