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Numerical Study on Atmospheric Flow Variation Associated With the Resolution of Topography
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 Title & Authors
Numerical Study on Atmospheric Flow Variation Associated With the Resolution of Topography
Lee, Soon-Hwan; Kim, Sun-Hee; Ryu, Chan-Su;
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 Abstract
Orographic effect is one of the important factors to induce Local circulations and to make atmospheric turbulence, so it is necessary to use the exact topographic data for prediction of local circulations. In order to clarify the sensitivity of the spatial resolution of topography data, numerical simulations using several topography data with different spatial resolution are carried out under stable and unstable synoptic conditions. The results are as follows: 1) Influence of topographic data resolution on local circulation tends to be stronger at simulation with fine grid than that with coarse grid. 2) The hight of mountains in numerical model become mote reasonable with high resolution topographic data, so the orographic effect is also emphasized and clarified when the topographic data resolution is higher. 2) The higher the topographic resolution is, the stronger the mountain effect is. When used topographic data resolution become fine, topography in numerical model becomes closer to real topography. 3) The topographic effect tends to be stronger when atmospheric stability is strong stable. 4) Although spatial resolution of topographic data is not fundamental factor for dramatic improvement of weather prediction accuracy, some influence on small scale circulation can be recognized, especially in fluid dynamic simulation.
 Keywords
Topography;Spatial resolution;Atmospheric flow;Numerical simulation;Atmospheric stability;
 Language
Korean
 Cited by
1.
복잡 연안지역의 지표면 자료 상세화에 따른 수치 기상장 분석,이화운;전원배;이순환;최현정;

한국대기환경학회지, 2008. vol.24. 6, pp.649-661 crossref(new window)
2.
한반도 풍력 자원 지도의 공간 해상도가 풍력자원 예측 정확도에 미치는 영향에 관한 수치연구,이순환;이화운;김동혁;김민정;김현구;

Journal of Environmental Science International, 2009. vol.18. 8, pp.885-897 crossref(new window)
3.
합성토지피복자료와 고해상도 중규모 모형을 이용한 시화호 지역의 토지이용 변화에 따른 주변 기상장 변화 연구,박선기;김지희;

대기, 2011. vol.21. 4, pp.405-414
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