Modeling SOA formation from the oxidation anthropogenic precursors in an outdoor chamber
Modeling SOA formation from the oxidation anthropogenic precursors in an outdoor chamber
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DOI：
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发表时间：
2014-09
影响因子：
6.3
通讯作者：
F. Couvidat;M. G. Vivanco;C. Seigneur;B. Bessagnet
中科院分区：
文献类型：
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作者：
F. Couvidat;M. G. Vivanco;C. Seigneur;B. Bessagnet
二次有机气溶胶（SOA）是大气颗粒物的重要组成部分。这些颗粒是由于某些有机气体的氧化反应而形成的，该氧化反应导致形成低挥发性化合物。在过去的几年中，已经进行了大量的研究，以考虑SOA机制中的条件（如低NOx或高NOx条件，干燥或潮湿条件）的影响。在这项研究中，我们提出了SOA模型的箱形模型结果与EUPHORE室外室（Ceam，瓦伦西亚，西班牙; Vivanco等人，2013年）。实验的重点是在不同的条件下（干燥或潮湿的条件下，不同的NOx浓度和有或没有SO2）的四种人为VOCs（甲苯，1，3，5三甲苯，邻二甲苯和辛烷）的混合物。一些测量（如某些化合物的测量浓度，SMPS数据）被用来约束盒模型，并正确表示气相化学，这可能会强烈影响SOA的形成。
Secondary organic aerosols (SOA) constitute a significant fraction of the atmospheric particulate matter. These particles are formed as a consequence of the oxidation reaction of certain organic gases that leads to the formation of low-volatility compounds. Much research has been done during the last years to take into account the influence of conditions (like low-NOx or high NOx conditions, dry or humid conditions) in SOA mechanisms. In this study we present a comparison between box model results of a SOA model to measurements done in the outdoor chambers EUPHORE (Ceam, Valencia, Spain; Vivanco et al., 2013). The experiments were focused on a mixture of four anthropogenic VOCs (toluene, 1,3,5 trimethylbenzene, o-xylene and octane) over different sets of conditions (dry or humid conditions, different NOx concentrations and with or without SO2). Some measurements (like measured concentrations of some compounds, SMPS data) were used to constrain the box model and represent properly the gas-phase chemistry, which can impact strongly SOA formation.