SECONDARY ORGANIC AEROSOL FORMATION AND TRANSPORT
SECONDARY ORGANIC AEROSOL FORMATION AND TRANSPORT
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DOI：
10.1016/0960-1686(92)90358-r
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发表时间：
1992-09-01
期刊：
影响因子：
--
通讯作者：
SEINFELD, JH
中科院分区：
文献类型：
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作者：
PANDIS, SN;HARLEY, RA;SEINFELD, JH
本文建立了模拟二次有机气溶胶形成、输送和沉积的拉格朗日轨迹模型，并应用于1987年8月27-28日洛杉矶地区的大气污染事件。1987年8月28日预测的二次有机气溶胶占基本情景模拟中内陆地区测量的颗粒有机碳的15-22%，沿海地区的5-8%。在这次事件中，预计加州克莱蒙特的最大二次有机气溶胶浓度为6.8 μ -g -3。据预测，在克莱蒙特，每日平均约有46%的二次有机气溶胶是由非甲苯芳烃（二甲苯、烷基苯等）氧化产生的，19%来自甲苯，16%来自生物烃（α -蒎烯、β -蒎烯等），15%来自烷烃，4%来自烯烃。预测二次有机气溶胶浓度的主要不确定因素是反应性有机气体排放、气溶胶产量和两相间可冷凝气体的分配。反应性有机气体（ROG）排放量增加一倍会导致Claremont预测的二次有机气溶胶增加2.3倍。预测的二次有机气溶胶水平对二次有机气溶胶沉积和NOx排放的变化的敏感性低于对ROG排放的敏感性。
A Lagrangian trajectory model simulating the formation, transport and deposition of secondary organic aerosol is developed and applied to the Los Angeles area, for the air pollution episode of 27-28 August 1987. The predicted secondary organic aerosol on 28 August 1987 represents 15-22% of the measured particulate organic carbon at inland locations in the base case simulations, and 5-8% of that at coastal locations. A maximum secondary organic aerosol concentration of 6.8-mu-g m-3 is predicted for Claremont, CA, during this episode. On a daily average basis at Claremont about 46% of this secondary organic aerosol is predicted to be a result of the oxidation of non-toluene aromatics (xylenes, alkylbenzenes, etc.), 19% from toluene, 16% from biogenic hydrocarbons (alpha-pinene, beta-pinene, etc.), 15% from alkanes and 4% from alkenes. The major uncertainties in predicting secondary organic aerosol concentrations are the reactive organic gas emissions, the aerosol yields and the partitioning of the condensable gases between the two phases. Doubling the reactive organic gas (ROG) emissions results in an increase of the secondary organic aerosol predicted at Claremont by a factor of 2.3. Predicted secondary organic aerosol levels are less sensitive to changes in secondary organic aerosol deposition and NOx emissions than to ROG emissions.