추적자 확산 실험에 의한 서울 도심 확산 현상 연구- 추적기체의 확산특징과 CALPUFF 모델에 의한 모사

초록

A series of tracer experiments for the evaluation of atmospheric dispersion was performed over the urban area of-deposition perfluorocarbon (PMCH and m-PDCH) gases during three years campaignon 2002, 2003 and 2005. 30 sampling sites for collecting these tracers were located along two arcs of 2.5 and 5kilometers downwind from the release point. About ten measurements which each lasted for 2 hours or 4 hourswere made over the two consecutive days during each campaign.Modeling domain was 27 km× 23 km and the fine nest in the modeling domain had a grid size of 0.5 km. Theresults showed that CALPUFF dispersion model had a tendency to estimate tracer concentrations about 2~ 5 timesless than those of ambient samples under many conditions. These consistent inaccuracy in urban dispersion wasattributed to inherent inaccuracy and lack of details in terrain data at urban area.

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