Using a mass transfer model and the volatility basis set, we estimate the volatility distribution for the organic aerosol (OA) components during summer and winter in Paris, France as part of the collaborative project MEGAPOLI. The concentrations of the OA components as a function of temperature were measured combining data from a thermodenuder and an aerosol mass spectrometer (AMS) with Positive Matrix Factorization (PMF) analysis. The hydrocarbon-like organic aerosol (HOA) had similar volatility distributions for the summer and winter campaigns with half of the material in the saturation concentration bin of 10?μg?m?3 and another 35–40 % consisting of low and extremely low volatility organic compounds (LVOCs with effective saturation concentrations C* of 10?3–0.1?μg?m?3 and ELVOCs C* less or equal than 10?4?μg?m?3, respectively). The winter cooking OA (COA) was more than an order of magnitude less volatile than the summer COA. The low-volatility oxygenated OA (LV-OOA) factor detected in the summer had the lowest volatility of all the derived factors and consisted almost exclusively of ELVOCs. The volatility for the semi-volatile oxygenated OA (SV-OOA) was significantly higher than that of the LV-OOA, containing both semi-volatile organic components (SVOCs with C* in the 1–100?μg?m?3 range) and LVOCs. The oxygenated OA (OOA) factor in winter consisted of SVOCs (45 %), LVOCs (25 %) and ELVOCs (30 %). The volatility of marine OA (MOA) was higher than that of the other factors containing around 60 % SVOCs. The biomass burning OA (BBOA) factor contained components with a wide range of volatilities with significant contributions from both SVOCs (50 %) and LVOCs (30 %). Finally, combining the bulk average O?:?C ratios and volatility distributions of the various factors, our results are placed into the two-dimensional volatility basis set (2D-VBS) framework. The OA factors cover a broad spectrum of volatilities with no direct link between the average volatility and average O?:?C of the OA components.
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机译：使用大规模转移模型和挥发性基础集，我们估计了法国巴黎夏季和冬季的有机气溶胶（OA）组件的波动率分布，作为百万富相协作项目的一部分。测量作为温度的函数的OA组分的浓度与阳性基质分子（PMF）分析相结合的数据与恒温器和气溶胶质谱仪（AMS）组合。烃类有机气溶胶（HOA）在夏季和冬季运动中具有相似的挥发性分布，其中饱和浓度箱的一半物质为10？μg≤M≤3和另外35-40％，由低且极低的挥发性组成有机化合物（具有有效饱和浓度的LVOC，C *为10？3-0.1≤μg≤M≤3和ELVOCs C *较小或等于10？4？μg≤M≤3）。冬季烹饪OA（COA）比夏季COA更不稳定的数量级。夏季检测到的低挥发性氧化OA（LV-OOA）因子具有所有衍生因子的最低波动性，几乎仅由ELVOC组成。半挥发性含氧OA（SV-OOA）的挥发性显着高于LV-OOA的挥发性，含有半挥发性有机组分（在1-100Ωμg≤M≤M≤3范围内的SVOC。和lvocs。冬季中的含氧OA（OOA）因子由SVOC（45％），LVOC（25％）和ELVOC（30％）组成。海洋OA（MOA）的挥发性高于含有约60％SVOC的其他因素的挥发性。生物质燃烧OA（BboA）因子包含具有广泛易变量的组成部分，具有来自SVOC的显着贡献（50％）和LVOC（30％）。最后，组合批量平均O？：？C比率和各种因素的挥发性分布，我们的结果被置于二维波动性基础集（2D-VBS）框架中。 OA因子涵盖了广泛的易变量，平均波动性与平均O之间没有直接链接？：oA组件的Δc。
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