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The Role of Local Circulation for the Improvement on Urban Thermal Environment

도시 열환경 개선을 위한 국지순환풍의 역할에 관한 연구

  • Park, Myong-Hee (National fisheries Research & Development Institute) ;
  • Jung, Woo-Sik (Department of Atmospheric Environment Information Engineering/Atmospheric Environment Information Research Center, Inje University) ;
  • Kim, Hae-Dong (College of Environment, Keimyung University)
  • 박명희 (국립수산과학원) ;
  • 정우식 (인제대학교 대기환경정보공학과/대기환경정보연구센터) ;
  • 김해동 (계명대학교 환경대학)
  • Received : 2010.08.10
  • Accepted : 2010.09.13
  • Published : 2010.10.31

Abstract

In this study the AWS was installed in three areas to analyze creation and characteristics of local wind circulation through observation. According to the result, in night time when mountain wind is well developed showed temperature in A area located in Dalbigol valley and B area adjacent with the valley was lower than C area located in the lowland of the center of city by $1.5\sim4^{\circ}C$. The wind speed was also shown two times stronger than C area. In addition, in terms of wind direction, A and B areas showed east wind consistently according to topographic shapes of Dalbigol valley with high altitude and residential sites of lowland with low altitude. Although the C area didn't show big changes in wind direction due to the effects of city structures, east wind is often seen so mountain wind from Dalbigol valley is found to have an effect at least. Through the analysis of temperature, wind speed, and wind direction, nigh time showed relatively cold mountain wind blew following Dalbigol valley, throughout residential sites and to the center of city with lowland. During the daytime, the temperature in the city with lowland and residential sites is constantly higher than A area located in Dalbigol valley, and strong wind speed following Dalbigol valley, and three areas have $200\sim300^{\circ}$ of main wind direction, so west valley wind throughout the city with lowland and following Dalbigol is clearly formed.

Keywords

Local circulation;Valley wind

Acknowledgement

Supported by : 한국연구재단

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