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首页> 外文期刊>Atmospheric chemistry and physics >Evaluating the impact of new observational constraints on P-S/IVOC emissions, multi-generation oxidation, and chamber wall losses on SOA modeling for Los Angeles, CA
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Evaluating the impact of new observational constraints on P-S/IVOC emissions, multi-generation oxidation, and chamber wall losses on SOA modeling for Los Angeles, CA

机译：评估新的观察限制对P-S / IVOC排放，多代氧化和腔室墙壁损失对洛杉矶，CA的影响

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摘要

Secondary organic aerosol (SOA) is an important contributor to fine particulate matter (PM) mass in polluted regions, and its modeling remains poorly constrained. A box model is developed that uses recently published literature parameterizations and data sets to better constrain and evaluate the formation pathways and precursors of urban SOA during the CalNex 2010 campaign in Los Angeles. When using the measurements of intermediate-volatility organic compounds (IVOCs) reported in Zhao et al. (2014) and of semivolatile organic compounds (SVOCs) reported in Worton et al. (2014) the model is biased high at longer photochemical ages, whereas at shorter photochemical ages it is biased low, if the yields for VOC oxidation are not updated. The parameterizations using an updated version of the yields, which takes into account the effect of gas-phase wall losses in environmental chambers, show model-measurement agreement at longer photochemical ages, even though some low bias at short photochemical ages still remains. Furthermore, the fossil and non-fossil carbon split of urban SOA simulated by the model is consistent with measurements at the Pasadena ground site.
机译：二次有机气溶胶（SOA）是污染区域细颗粒物质（PM）质量的重要因素，其建模仍然受到严重的影响。开发了一个盒式型号，该模型使用最近公布的文献参数化和数据集，以更好地限制和评估在洛杉矶的Calnex 2010竞选期间城市SOA的形成途径和前兆。当使用Zhao等人报道的中间挥发性有机化合物（IVOC）的测量值时。 （2014）和在Worton等人报道的半挥发性有机化合物（SVOC）。 （2014）该模型在光化学年龄较长的时间内偏压，而在较短的光化学年龄下，如果VOC氧化的产量未更新，则偏置低。使用更新版本的收益率的参数化，这考虑了环境室中的气相壁损失的效果，以较长的光化学年龄显示模型测量协议，即使短暂光化学年龄仍然存在一些低偏差。此外，模型模拟的城市SOA的化石和非化石碳分割与Pasadena地面站的测量一致。

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