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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Modeling of formation and distribution of secondary aerosols in the Milan area (Italy) - art. no. D05306
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Modeling of formation and distribution of secondary aerosols in the Milan area (Italy) - art. no. D05306

机译：米兰地区（意大利）二次气溶胶形成和分布的模型-艺术。没有。 D05306

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1] The performance of an aerosol module of the three-dimensional Eulerian model CAMx ( Comprehensive Air Quality Model with Extensions) was evaluated in a domain covering the Po Basin in northern Italy. Concentrations of secondary aerosol species such as particulate NO3-, NH4+, SO42-, and SOC ( secondary organic carbon) were calculated for the particle size below 2.5 mum and compared with the data available from a field experiment, which took place in May - June 1998. Model results for the inorganic aerosols were comparable to the measurements at an urban and a rural station. Sensitivity studies with reduced anthropogenic NOx and volatile organic carbon (VOC) emissions showed that SOC behaves in the same way as ozone, i.e., decreases with reduced VOC emissions and increases with reduced NOx emissions in the plume where ozone production is predicted to be VOC sensitive. Sensitivity of secondary aerosol formation to NH3 and NOx emissions was studied by reducing these emissions. Varying NH3 emissions led to an almost linear change in secondary aerosol mass at sites with low NH3. At ammonia-rich sites, on the other hand, availability of nitrate became important for the further formation of secondary aerosols. Monoterpene emissions were predicted to contribute about 25% of the secondary organic aerosols produced in the northern part of the model domain, which is mostly a forested area. [References: 35
机译：1]在覆盖意大利北部Po盆地的区域中评估了三维欧拉模型CAMx（具有扩展功能的综合空气质量模型）的气溶胶模块的性能。计算了粒径小于2.5微米的次级气溶胶物质（例如NO3-，NH4 +，SO42-和SOC（次级有机碳））的浓度，并将其与5月至6月进行的田间试验的数据进行了比较。 1998年。无机气溶胶的模型结果与城市和农村站点的测量结果相当。减少人为NOx和挥发性有机碳（VOC）排放的敏感性研究表明，SOC的行为与臭氧相同，即，随着烟气中VOC排放的减少，SOC降低，而预计臭氧产生对VOC敏感的烟羽中的NOx排放则降低。 。通过减少这些排放，研究了次级气溶胶形成对NH3和NOx排放的敏感性。 NH3排放量的变化导致NH3含量较低的地方的次级气溶胶质量几乎呈线性变化。另一方面，在富含氨的场所，硝酸盐的可用性对于进一步形成次级气溶胶变得很重要。预测单萜排放将贡献模型域北部（主要是森林地区）产生的二次有机气溶胶的约25％。 [参考：35

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