Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Estimation of Atmospheric Turbulent Fluxes by the Bulk Transfer Method over Various Surface

다양한 지표면 위에서 총체 전달 방법에 의한 대기 난류 플럭스 추정

  • Kim, Min-Seong (Department of Environmental Atmospheric Sciences, Pukyong National University) ;
  • Kwon, Byung-Hyuk (Department of Environmental Atmospheric Sciences, Pukyong National University) ;
  • Kang, Dong-Hwan (Geo-Sciences Institute, Pukyong National University)
  • 김민성 (부경대학교 환경대기과학과) ;
  • 권병혁 (부경대학교 환경대기과학과) ;
  • 강동환 (부경대학교 지구과학연구소)
  • Received : 2014.04.22
  • Accepted : 2014.06.10
  • Published : 2014.06.30
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Abstract

The momentum flux and the sensible heat flux were measured with the scintillometers and ultrasonic anemometers at 6 sites of which surface characteristics like roughness length and zero-displacement are different each other. We estimated the momentum flux and the sensible heat flux based on the bulk transfer method with the drag coefficient and the heat transfer coefficient calculated from the temperature and wind speed at two heights. The variation of bulk transfer coefficients showed a remarkable difference depending on the atmospheric stability which is less influenced by the zero-displacement than the roughness length. The estimated sensible heat fluxes were in good agreement with those measured at 3 m, showing 23.7 $Wm^{-2}$ of the root mean square error that is less than 10% of its maximum. Since the estimated momentum flux is not only effected by drag coefficient but also by wind speed square, the determination of wind speed in the bulk transfer method is critical.

Keywords

References

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