도시녹지의 대기환경개선 효과 - 서울시 중구를 중심으로 -

초록

This study explored effects of urban greenspace on improving atmospheric environment, which is concerned with CO2, SO2 and NO2 uptake, and with reduction of summer air temperatures. The site of this study was focused on Jung-gu in Seoul. Tree density and cover were 1.1trees/100 m2 and 12.5% respectively for the study area except forest lands. Atmospheric purification by greenspace was associated with changes in tree cover per unit area of each land use type. The mean CO2 storage by woody plants was 19.4t/㏊, and annual uptake averaged 2.2t/㏊/yr for CO2, 1.9㎏/㏊/yr for SO2 and 5.0㎏/㏊/yr for NO2. Entire tree plantings in the study area played a significant role by annually offsetting CO2 emissions of about 1,830t from fossil fuel consumption by 330 persons, SO2 emissions of 1,620㎏ by 1,080 persons, and NO2 emissions of 4,230㎏ by 450 persons.The summer air temperature was 3.6 cooler at a location with 54% cover of woody plants and 4.5 cooler at a forest site with 100% cover, compared to a place with no planting. A 10% increase of woody plant cover was estimated to decrease summer air temperature by approximately 0.6 until a certain level of canopy cover. Analyzing data from the Automatic Weather Stations in Seoul revealed that increasing tree

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