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Analysis of Sea-breeze Frontogenesis over the Coastal Urban Area Using Urbanized MM5

도시형 중규모기상모델을 이용한 연안도시 해풍전선 발달 분석

  • Hwang, Mi-Kyoung (Division of Earth Environmental System, Pusan National University) ;
  • Oh, In-Bo (Environmental Health Center, University of Ulsan) ;
  • Kim, Yoo-Keun (Division of Earth Environmental System, Pusan National University)
  • 황미경 (부산대학교 지구환경시스템학부) ;
  • 오인보 (울산대학교 환경보건센터) ;
  • 김유근 (부산대학교 지구환경시스템학부)
  • Received : 2011.01.28
  • Accepted : 2011.07.06
  • Published : 2011.08.31

Abstract

To analyze the physical processes of sea-breeze development over a coastal urban area, numerical simulation for seabreeze (SB) and its frontogenesis was examined based on urbanized MM5 (uMM5) with urban canopy parameterization. On 6 August 2006, SB and its front were well developed in Busan under a weak offshore flow. As a result of wind vector, ZVB (Zero Velocity Boundary), potential temperature obtained the uMM5, at 0900 LST, SB advanced below 200 m height in the coastal areas and the internal boundary grew with the urban coastal region. At noon, the height of the SB head with updraft was approximately one and a half times (~600 m) higher than its depth in central urban. Applying the frontogenesis function, the SB structure for frontogenesis and frontolysis were complicated spatially; the dynamic effects of wind (i.e. convergence and tilting term) could play an important role in the growth of SB, especially the convergence effect.

Keywords

References

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