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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국기상학회 Asia-Pacific Journal of Atmospheric Sciences 韓國氣象學會誌 第28卷 第3號
발행연도
수록면
225 - 241 (17page)

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초록· 키워드

A numerical experiment of nocturnal drainage flows with and without prevailing synoptic winds in an area of the Taebaek mountains is performed using a simplified second-moment turbulence closure model in which only turbulence kinetic energy and turbulence length scale equations are solved prognostically. The results show that for the case of the zero prevailing synoptic wind the nocturnal drainage flows are well developed along the downslope with horizontal convergence both in the basin and valley while horizontal divergence at the top of the mountains. The associated circulation produces a cool air pool in the basin and valley while warming at the top of the mountains. The Drainage flows are confined within the lower layer near the surface with a maximum intensity at the height of 10 m above the ground. This intensity tends to increase with increasing slope angles and downslope distance but decreases in the valley due to horizontal convergence of drainage flows. For the cases of a given prevailing synoptic wind, horizontal convergence and the associated vertical motion in the lower layer near the surface are more intensified compared with pure drainage flows, probably due to advection by the synoptic wind. A cool air pool in the basin and valley is also intensified due to enhanced horizontal convergence and vertical motion, which, in turn, develops valley flows flowing out of the basin and valley. Consequently, the flows along the downslope are also strengthened in order to satisfy mass conservation. The simulated winds for the given synoptic wind are found to be fairly good agreement with the observed winds in the region where the model topography is more realistic.
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목차

  1. Abstract
  2. 1. 서론
  3. 2. 지형
  4. 3. 모델 방정식
  5. 4. 경계 조건
  6. 5. 모델 설계
  7. 6. 초기 조건
  8. 7. 모델 결과 및 분석
  9. 8. 요약 및 결론
  10. 참고문헌

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UCI(KEPA) : I410-ECN-0101-2009-453-016264013