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KMID : 1024520100190101257
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Journal of the Environmental Sciences
2010 Volume.19 No. 10 p.1257 ~ p.1269
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The Role of Local Circulation for the Improvement on Urban Thermal Environment
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Park Myong-Hee
Jeong Woo-Sik
Kim Hae-Dong
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Abstract
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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∼4℃. 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∼300° of main wind direction, so west valley wind throughout the city with lowland and following Dalbigol is clearly formed.
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KEYWORD
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Local circulation, Valley wind
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