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Calculations of Incremental Secondary Organic Aerosol Reactivity

机译:增量式次级有机气溶胶反应性的计算

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The incremental secondary organic aerosol reactivity (ISOAR) of a species j is defined as the relative incremental change in secondary organic aerosol (SOA) formed per relative incremental change in the amount of species/emitted. The California Institute of Technology three-dimensional air quality model is used in conjunction with the Caltech Atmospheric Chemistry Mechanism (CACM) and the Model to Predict the Multiphase Partitioning of Organics to calculate spatially and temporally averaged ISOAR values for the South Coast Air Basin of California (SoCAB). The base case SOA concentrations are derived for September 9, 1993. The South Coast Air Quality Management District of California provided emission and meteorological data. ISOAR values are calculated for the lumped surrogate compounds considered by CACM: isoprene, low-yield monoterpenes, high-yield monoterpenes, high-yield aromatics, etc. This work presents basin-wide ISOAR values determined through regression analysis. In addition, ISOAR values are reported at individual locations within the SoCAB. Modeled data are compared with ISOAR values calculated using smog chamber data. Results indicate that long-chain alkanes present the highest ISOAR. On the other hand, short-chain organics present the lowest ISOAR.
机译:物种j的增量次级有机气溶胶反应性(ISOAR)定义为,物种/排放量的相对增量变化形成的次级有机气溶胶(SOA)的相对增量变化。加州理工学院三维空气质量模型与加州理工学院大气化学机制(CACM)和预测有机物的多相分配模型结合使用,以计算加利福尼亚南海岸空气盆地的时空平均ISOAR值(SoCAB)。基本案例中的SOA浓度是1993年9月9日得出的。加利福尼亚州南海岸空气质量管理区提供了排放和气象数据。计算CACM考虑的集总替代化合物的ISOAR值:异戊二烯,低收率单萜,高收率单萜,高收率芳烃等。这项工作提出了通过回归分析确定的全盆地范围的ISOAR值。另外,ISOAR值在SoCAB中的各个位置报告。将建模数据与使用烟雾室数据计算出的ISOAR值进行比较。结果表明,长链烷烃具有最高的ISOAR。另一方面,短链有机物的ISOAR最低。

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