Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Investigation of Change in Air-Sea CO2 Exchange over the East China Sea using Biogeochemical Ocean Modeling

생지화학모델링을 이용한 동중국해 해양-대기 CO2교환량의 변화 연구

  • Park, Young-Gyu (Climate Change & Coastal Disaster Research Department, KORDI) ;
  • Choi, Sang-Hwa (Ocean Data Management Team, KORDI) ;
  • Yeh, Sang-Wook (Climate Change & Coastal Disaster Research Department, KORDI) ;
  • Lee, Jung-Suk (Institute of Environmental Protection and Safety, NeoEnBiz Co.) ;
  • Hwang, Jin-Hwan (Dept. Civil Environment System Engineering Dongguk University) ;
  • Kang, Seong-Gil (Marine Safety & Pollution Response Research Department, MOERI, KORDI)
  • 박영규 (한국해양연구원 기후.연안재해연구부) ;
  • 최상화 (한국해양연구원 해양자료팀) ;
  • 예상욱 (한국해양연구원 기후.연안재해연구부) ;
  • 이정석 ((주)네오엔비즈 환경안전연구소) ;
  • 황진환 (동국대학교 사회환경시스템공학과) ;
  • 강성길 (한국해양연구원 해양시스템안전연구소 해양안전.방제기술연구부)
  • Published : 2008.09.30
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Abstract

A biogeochemical model was used to estimate air-sea $CO_2$ exchange over the East China Sea. Since fresh water discharge from the Changjiang River and relevant chemistry were not considered in the employed model, we were not able to produce accurate results around the Changjiang River mouth. This factor aside, the model showed that the East China Sea, away from the Changjiang River mouth, takes approximately $1.5{\sim}2\;mole\;m^{-2}yr^{-1}$ of $CO_2$ from the atmosphere. The model also showed that biological factors modify the air-sea $CO_2$ flux by only a few percent when we assumed that biological activity increased two-fold. Therefore, we can argue that the biological effect is not strong enough over this area within the framework of the current phosphate-based biological model. Compared to the preindustrial era, in 1995 the East China Sea absorbed $0.4{\sim}0.8\;mole\;m^{-2}yr^{-1}$ more $CO_2$. If warming of the sea surface is considered, in addition to the increase in atmospheric $CO_2$ concentration, by 2045 the East China Sea would absorb $0.2{\sim}0.4\;mole\;m^{-2}yr^{-1}$ less $CO_2$ compared to the non-warming case.

Keywords

References

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