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RISS 인기검색어
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- 저자 : Ronald C. Cohen (검색결과 1 건)
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Begie Perdigones,Soojin Lee,Ronald C. Cohen,Jeong-Hoo Park,Kyung-Eun Min 한국대기환경학회 2021 한국대기환경학회 학술대회논문집 Vol.2021 No.10
At ground level, ozone (O₃) is a growing environmental concern as it is a toxic air pollutant and greenhouse gas. The complexity and impact of its control measures mainly depend on its precursor emissions (NOx and VOCs) and their related chemistry. In this study, we analyze how the atmosphere responds to the changes in precursors abundances and project the reduction scenario for attaining the O₃ standard using two decades of air quality and meteorological datasets in South Coast Air Basin (SoCAB), California. Under the carefully selected circumstances, we computed the rate of change in O₃ concentration to serve as O₃ production and loss rate proxies which are needed to back-calculate the 8-hour maximum O₃ concentration and consequently assess O₃ percent exceedance days. Based on the results, SoCAB has ~26% O₃ exceedance days which agrees with real observation (~28%). Given this current exceedance, it is estimated that an additional ~41 to 62% NOx reduction would be necessary to at least lower the exceedance to ~20 and 10%, respectively. However, under the current energy production reliance, this would be challenging to achieve without the concurrent reduction in VOCs.
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