Introducing a partitioning mechanism for PAHs into the Community Multiscale Air Quality modeling system and its application to simulating the transport of benzo(a) pyrene over Europe
Introducing a partitioning mechanism for PAHs into the Community Multiscale Air Quality modeling system and its application to simulating the transport of benzo(a) pyrene over Europe
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DOI：
10.1175/2007jamc1395.1
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发表时间：
2007-11-01
影响因子：
3
通讯作者：
Quante, Markus
中科院分区：
文献类型：
--
作者：
Aulinger, Armin;Matthias, Volker;Quante, Markus
广泛用于模拟空气污染物的传输和归宿的社区多尺度空气质量建模系统 (CMAQ) 中插入了一个新模块，用于解释半挥发性有机化合物（特别是多环有机碳氢化合物 (PAH)）在气相和颗粒相之间的分配。这种 PAH 版本的 CMAQ 目前可应用于主要与颗粒相关且可假定为惰性的物质，如苯并 (a) 芘 [B(a) P] 的情况。该模型是为欧洲建立的，网格单元宽度为 54 公里，网格单元宽度为 18 公里，网格单元位于北海周围，模拟 2000 年 1 月、4 月、7 月和 10 月的环境空气浓度和 B(a) P 沉积。为了评估模拟结果的质量，将每日和每月的平均浓度与六个监测站的测量值进行了比较。模型与测量值的典型比率约为 4（中值），这对于测量和模拟的不确定性以及比较测量与模拟时涉及的问题证明，CMAQ 的 PAH 版本适合模拟 B(a) P 在欧洲的命运和迁移，并且可以作为另外考虑降解的其他 PAH 模型的起点。
Into the Community Multiscale Air Quality modeling system (CMAQ) that is widely used for simulating the transport and fate of air pollutants, a new module was inserted that accounts for the partitioning of semivolatile organic compounds-in particular, polycyclic organic hydrocarbons (PAHs)-between the gaseous and the particulate phases. This PAH version of CMAQ can at this time be applied to substances that are predominantly associated with particles and can be assumed to be inert, as is the case for benzo(a) pyrene [B(a) P]. The model was set up for Europe on a grid with 54-km cell width with a nest of 18-km gridcell width located around the North Sea to simulate ambient air concentrations and depositions of B(a) P in January, April, July, and October 2000. To evaluate the quality of the simulation results, daily and monthly mean concentrations were compared with measurements from six monitoring stations. The typical ratio of modeled to measured values is circa 4 (median), which-with respect to both measurement and simulation uncertainties and problems involved when comparing measurements with simulations-proved that the PAH version of CMAQ is suitable to simulate the fate and transport of B(a) P over Europe and can serve as a starting point for models for other PAHs that additionally consider degradation.