003 3次元モデル解析による最大オゾン濃度出現時刻とNO_xおよびHC排出量の関係(環境シミュレーション技術)

概要

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Photochemical ozone (O_3) is one of the most common types of pollutant in Japan. O_3 concentrations more than twice the environmental standard are often observed in Japan's big cities. In this study, we developed a comprehensive prediction model for atmospheric pollutants concentration, including O_3, nitrogen oxides (NO_x) and other pollutants. By using the model, we investigated the relationship between O_3 generation and emission levels of primary pollutants such as NO_x and hydrocarbons (HC) around Osaka bay area. We simulated to reproduce O_3, NO and NO_2 concentration on typical summer day. Diurnal variations of simulation results were similar to observations. Predicted pollutants levels couldn't reproduce perfectly. The results of the simulation suggested that O_3 concentration decreases with reduction in emissions of NO_x and HC. However, for higher emissions of NO_x, reduction in the rate of NO_x emissions leads to an increase in O_3 concentration above its uncontrolled value. Also, with decrease in O_3 concentration, the time when maximum O_3 value appeared tends to become late.
社団法人日本機械学会の論文
2001-07-09