Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
권호 표지

On the Low Level Strong Wind Occurring at the Downwind Side of the Kumjeong Mountain.

금정산 풍하측 저고도의 강풍 현상

  • 임상진 (부산대학교 지구과학과) ;
  • 서광수 (부산대학교 지구과학과)
  • Published : 1996.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

We identified two characteristic turbulent flow cases, weakening and strengthening, which appear at the downwind side. Observations were made two times, Dec. 2-3. 1995 and Feb. 13-14. 1996 at Pusan National University site located downwind side of Kumjeong mountain. Meteorological observation system, tethersonde, was adopted to present observation. In the case of the west wind which blows perpendicular to Sanghak mountain located westward from the site, the wind speed highly increased in exponential with height. Therefore, the low level wind speed was so weak just like Taylor(1988)'s review. While the wind speed was intensified at 200-400m layer when the northwest wind blows from the continental Siberian high. We suppose 기 is because of the strong vertical convergence of flow between the surface inversion layer and the upper one, and also the horizontal convergence along the saddle and valley between the two mountains, Kumjeong and Sanghak-because of Bernoulli's effect. The inversion layer existed at surface-l00m and 500-600m level and the strong wind existed at about 200-400m layer.

Keywords

References

  1. Meso-Scale Atmospheric Circulation Atkinson,B.W.
  2. Q. Jl. R. Met. Soc. v.108 Airflow over hills of moderate slope Carruthers,D.J.;T.W.Choularton
  3. Q. Jl. R. Met. Soc. v.84 The air flow over a ridge - the effects of the upper boundary and high level conditions Corby,G.A.;Sawyer,J.S.
  4. Meteorologicke Zpravy v.3 Wave currents on the leeward side of mountain crests Forchtgott,J.
  5. Atmospheric Boundary Layer Flows Kaimal,J.C.;J.J.Finnigan
  6. Bull. Am. Met. Soc. v.29 The problem of air flow over mountains: summary of theoretical studies Queney,P.A.
  7. Q. Jl. R. Met. Soc. v.86 Numerical calculation of the displacements of a stratified airstrem crossing a ridge of small height Sawyer,J.S.
  8. Flow and Transport in the Natural Environment: Advances and Applications Turbulent wakes in the atmospheric boundary layer Taylor,P.A.
  9. Weather v.15 Introduction to lee waves in atmosphere Wallington,C.E.