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Korean Meteorological Society (한국기상학회)
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Observation and Analysis of Turbulent Fluxes Observed at Ieodo Ocean Research Station in Autumn 2014

2014년 가을철 이어도 종합과학기지에서의 난류 플럭스의 관측 및 분석

  • Yun, Junghee (Department of Atmospheric Sciences, Pusan National University) ;
  • Oh, Hyoeun (Department of Atmospheric Sciences, Pusan National University) ;
  • Ha, Kyung-Ja (Department of Atmospheric Sciences, Pusan National University)
  • 윤정희 (부산대학교 지구환경시스템학부) ;
  • 오효은 (부산대학교 지구환경시스템학부) ;
  • 하경자 (부산대학교 지구환경시스템학부)
  • Received : 2015.09.10
  • Accepted : 2015.11.28
  • Published : 2015.12.31
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Abstract

This study investigates the characteristics of turbulent fluxes observed at Ieodo Ocean Research Station (IORS) in autumn 2014. The 10 Hz IORS data is quality controlled and calculated to be the 30 minutes turbulent fluxes. The quality control consists of five steps: a weather check, Vickers and Mahrt (VM) sequential check, VM parallel check, flag check, and direction check. Since the IORS is an open-sea station with no orographic influence, there are no significant diurnal variations for the turbulent fluxes and 10 m wind speed. According to stabilities, the unstable and semi-unstable states appear more than 28% and 70% in autumn, respectively and they have strong winds of over $10m\;s^{-1}$. In addition, the turbulent fluxes increase with increasing wind speed. In particular, the latent heat flux and its deviations are clearly shown because the latent heat flux is influenced by the change of both the sea surface roughness and wave height induced by the wind. To demonstrate the changes of the turbulent fluxes before and after typhoon, Vongpong (1419), which is the most intense typhoon affecting the Korean Peninsula in 2014, is considered. The turbulent flux fluctuates in accordance with the location of Vongpong. The turbulent fluxes have a large (small) variation when Vongpong approaches (retreats) at the IORS. The overall results represent that the IORS data helps us understand physical processes related to air-sea interaction by providing the valuable and reliable observed data.

Keywords

References

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