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首页> 外文期刊>Journal of the Air & Waste Management Association >Projected changes in particulate matter concentrations in the South Coast Air Basin due to basin-wide reductions in nitrogen oxides, volatile organic compounds, and ammonia emissions
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Projected changes in particulate matter concentrations in the South Coast Air Basin due to basin-wide reductions in nitrogen oxides, volatile organic compounds, and ammonia emissions

机译：由于整个盆地范围内氮氧化物，挥发性有机化合物和氨排放量的减少，预计南海岸空气盆地的颗粒物浓度将发生变化

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An ozone abatement strategy for the South Coast Air Basin (SoCAB) has been proposed by the South Coast Air Quality Management District (SCAQMD) and the California Air Resources Board (ARB). The proposed emissions reduction strategy is focused on the reduction of nitrogen oxide (NOx) emissions by the year 2030. Two high PM2.5 concentration episodes with high ammonium nitrate compositions occurring during September and November 2008 were simulated with the Community Multi-scale Air Quality model (CMAQ). All simulations were made with same meteorological files provided by the SCAQMD to allow them to be more directly compared with their previous modeling studies. Although there was an overall under-prediction bias, the CMAQ simulations were within an overall normalized mean error of 50%; a range that is considered acceptable performance for PM modeling. A range of simulations of these episodes were made to evaluate sensitivity to NOx and ammonia emissions inputs for the future year 2030. It was found that the current ozone control strategy will reduce daily average PM2.5 concentrations. However, the targeted NOx reductions for ozone were not found to be optimal for reducing PM2.5 concentrations. Ammonia emission reductions reduced PM2.5 and this might be considered as part of a PM2.5 control strategy.Implications: The SCAQMD and the ARB have proposed an ozone abatement strategy for the SoCAB that focuses on NOx emission reductions. Their strategy will affect both ozone and PM2.5. Two episodes that occurred during September and November 2008 with high PM2.5 concentrations and high ammonium nitrate composition were selected for simulation with different levels of nitrogen oxide and ammonia emissions for the future year 2030. It was found that the ozone control strategy will reduce maximum daily average PM2.5 concentrations but its effect on PM2.5 concentrations is not optimal.
机译：南海岸空气质量管理区（SCAQMD）和加利福尼亚空气资源委员会（ARB）已经提出了南海岸空气盆地（SoCAB）的臭氧减排策略。拟议的减排策略的重点是到2030年减少氮氧化物（NOx）排放。使用“社区多尺度空气质量”模拟了2008年9月和11月发生的两次高PM2.5浓度高事件和高硝酸铵成分的事件。模型（CMAQ）。所有模拟均使用SCAQMD提供的相同气象文件进行，以使其与以前的建模研究相比更直接。尽管总体上存在预测不足的偏见，但是CMAQ模拟的总体归一化平均误差在50％以内；该范围被认为是PM建模可接受的性能。对这些事件进行了一系列模拟，以评估未来2030年对NOx和氨气排放输入的敏感性。发现当前的臭氧控制策略将降低每日平均PM2.5浓度。然而，针对臭氧的目标NOx还原并不是降低PM2.5浓度的最佳方法。减少氨排放量减少了PM2.5，这可能被认为是PM2.5控制策略的一部分。启示：SCAQMD和ARB提出了针对SoCAB的臭氧减排策略，重点是减少NOx排放。他们的策略将影响臭氧和PM2.5。选择了在2008年9月和11月发生的两次事件，其中PM2.5浓度高且硝酸铵成分高，在未来2030年模拟了不同水平的氮氧化物和氨气排放。发现臭氧控制策略将最大程度地减少每日平均PM2.5浓度，但对PM2.5浓度的影响不是最佳的。

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    Stewart Devoun R.; Saunders Emily; Perea Roberto; Fitzgerald Rosa; Campbell David E.; Stockwell William R.;

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    Sacramento City Coll, Dept Chem, Sacramento, CA USA;

    NASA, Global Modeling & Assimilat Off, Goddard Space Flight Ctr, Greenbelt, MD USA;

    Univ Texas El Paso, Dept Informat Technol, El Paso, TX 79968 USA;

    Univ Texas El Paso, Dept Phys, El Paso, TX 79968 USA;

    Nevada Syst Higher Educ, Desert Res Inst, Div Atmospher Sci, 2215 Raggio Pkwy, Reno, NV 89512 USA;

    Univ Texas El Paso, Dept Phys, El Paso, TX 79968 USA|Nevada Syst Higher Educ, Desert Res Inst, Div Atmospher Sci, 2215 Raggio Pkwy, Reno, NV 89512 USA;

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