지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록· 키워드
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The seasonal variations of ozone (O<sub>3</sub>) concentrations were investigated with regard to the relationship between O<sub>3</sub> and wind distributions at two different sites (Jung Ang (JA): a semi-closed topography and Seo Chang (SC): a closed topography) within a valley city (Yangsan) and their comparison between these sites (JA and SC) and two non-valley sites (Dae Jeo (DJ) and Sang Nam (SN)) located downwind from coastal cities (Busan and Ulsan). This analysis was performed using the data sets of hourly O<sub>3</sub> concentrations, meteorological factors (especially, wind speed and direction), and those on high O<sub>3</sub> days exceeding the 8-h standard (60 ppb) during 2008-2009. In summer and fall (especially in June and October), the monthly mean values of the daily maximum O<sub>3</sub> concentrations and the number of high O<sub>3</sub> days at JA (and SC) were relatively higher than those at DJ (and SN). The increase in daytime O<sub>3</sub> concentrations at JA in June was likely to be primarily impacted by the transport of O<sub>3</sub> and its precursors from the coastal emission sources in Busan along the dominant southwesterly winds (about 5 m/s) under the penetration of sea breeze condition, compared to other months and sites. Such a phenomenon at SC in October was likely to be mainly caused by the accumulation of O<sub>3</sub> and its precursors due to the relatively weak winds under the localized stagnant weather condition rather than the contribution of regional transport from the emission sources in Busan and Ulsan.
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