Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Characteristics of Snow-cell Formation Processes over the Southern Part of Yellow Sea on 4 February 2004 using the KEOP Intensive Observation Data

KEOP 집중관측자료를 활용한 2004년 2월 4일 황해 남부해상의 강설세포 형성과정 특성 분석

  • Kim, Baek-Jo (Policy Research Lab., National Institute of Meteorological Research) ;
  • Cho, Chun-Ho (Policy Research Lab., National Institute of Meteorological Research) ;
  • Ryu, Chan-Su (Department of Atmospheric Sciences, Graduate School Chosun University) ;
  • Chung, Hyo-Sang (Department of Atmospheric Sciences, Graduate School Chosun University)
  • Published : 2007.12.31
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Abstract

The formation mechanism of the snow cells of the Yellow Sea associated with snowfall over the southwestern part of Korea on 4 February, 2004 has been investigated using special upper-air sounding and radar data obtained for the KEOP(Korea Enhanced Observing Period) Intensive Observing Period(IOP). Results show that the types of snow cells for the selected period are classified into L(Longitudinal)-mode, Low-level convergence, and T(Transverse)-mode with their evolution from L-mode to T-mode. In particular, the existence of low-level warm and humid layer associated with temporally southwesterly inflow for about 4 hours provides a favorable condition in forming the T-mode snow cells. The vertical depth of the T-mode snow cells is deeper than that of L-mode ones due to the southeastward penetration of cold and dry air into relatively warm and humid air. In addition, it is found that wind shear vector between 1000 hPa and 600 hPa is one of the factors which control the orientation of snow cells in formation embedded into the snowbands for the both modes.

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References

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