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首页> 外文会议>Tenth International Conference on Modelling, Monitoring and Management of Air Pollution Jul, 2002 City of Segovia >Modelling the episodic pollutants deposition over the EMEP 17,6 cell
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Modelling the episodic pollutants deposition over the EMEP 17,6 cell

机译：模拟EMEP 17,6细胞上的突发污染物沉积

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摘要

EMEP 17,6 cell is a 150x150 km~2 area located at the Northwest of Spain, that includes several complex features in air pollution dispersion and chemical transformation, such as different and complex pollutants sources, and a coastal and complex terrain environment, with changeable weather. Considering these features, in order to estimate the pollutants' deposition at this location and the relative contribution of the main sources, episodic simulations of the pollutants' transport was done using the Sulphur Transport Eulerian Model 2 (STEM-II), for dry and wet deposition conditions. Emissions were obtained from CORINE AIR and stack measurements (when available). BVOC emissions were considered too. As the main result, the S and N depositions are increased by the action of the oxidants (such as H_2O_2, due to the VOCs photochemical mechanisms) in the coastal plumes, over the SO_2 (and NO_x) from power plants plumes. The increment of S deposition (as sulphate) is around 4 times (respect to the S deposition as SO_2, without the VOCs-NO_x emissions influence); in the case of N deposition, an additional influence over the coastline was observed, so the maximum deposition is located over the Northeastern coast. Therefore, for the management of the S and N deposition in this area, not only SO_2 and NO_x sources, but also VOCs sources should be considered.
机译：EMEP 17,6单元是位于西班牙西北部的150x150 km〜2区域，包括空气污染扩散和化学转化中的多个复杂特征，例如不同和复杂的污染物源，以及沿海和复杂的地形环境，其变化多端天气。考虑到这些特征，为了估算污染物在该位置的沉积及其主要来源的相对贡献，使用硫传递欧拉模型2（STEM-II）对干湿两点进行了污染物迁移的情景模拟沉积条件。排放是从CORINE AIR和烟囱测量（如果有）获得的。也考虑了BVOC排放。作为主要结果，在电厂烟羽中SO_2（和NO_x）的作用下，沿海烟羽中氧化剂（例如H_2O_2，由于VOC的光化学机理）的作用增加了S和N的沉积。 S沉积（以硫酸盐计）的增量约为4倍（相对于S沉积为SO_2，不受VOCs-NO_x排放的影响）；在N沉积的情况下，还观察到了对海岸线的额外影响，因此最大的沉积位于东北海岸。因此，为了管理该区域的S和N沉积，不仅应考虑SO_2和NO_x源，还应考虑VOCs源。

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