CMAQ simulations of the benzo(a)pyrene distribution over Europe for 2000 and 2001
CMAQ simulations of the benzo(a)pyrene distribution over Europe for 2000 and 2001
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DOI：
10.1016/j.atmosenv.2009.04.058
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发表时间：
2009-08-01
影响因子：
5
通讯作者：
Quante, Markus
中科院分区：
文献类型：
--
作者：
Matthias, Volker;Aulinger, Armin;Quante, Markus
为了调查欧洲环境空气中的苯并（a）芘（B（a）P）浓度和相应的沉积场，使用了社区多尺度空气质量模拟系统的扩展版本来模拟2000年和2001年的这些场。欧洲不同地区之间以及冬季和夏季浓度之间存在显著差异。模拟得出的B（a）P浓度在中欧、乌克兰南部和莫斯科周边地区最高。湿沉降与浓度的区域分布基本一致。将模拟的浓度和沉积物与欧洲监测和评价方案网络和德国联邦环境机构选定地点的测量值进行比较。这些数据平均被低估了50%。该模型较好地反映了B（a）P的时空演变和区域分布特征。在这里提出的方法中，颗粒结合的B（a）P通过与臭氧反应而发生降解。为了评估降解过程的重要性，将结果与未考虑颗粒结合B（a）P降解的模型运行进行比较。结果发现，包括B（a）P与臭氧的非均相反应导致模拟空气浓度降低约10%。系数为5。(C)2009爱思唯尔有限公司版权所有。
In order to investigate benzo(a)pyrene (B(a)P) concentrations in ambient air in Europe and the respective deposition fields an expanded version of the Community Multiscale Air Quality (CMAQ) Modelling system has been used to simulate these fields for the years 2000 and 2001. Significant differences exist between different regions in Europe and between winter and summer concentrations. Modelled B(a)P concentrations are highest in Central Europe, South Ukraine and around Moscow. Wet deposition shows mainly the same regional distribution as the concentrations. Simulated concentrations and depositions are compared to measurements at selected sites of the EMEP network and of the German Federal Environmental Agencies. The measurements are on average underestimated by 50%. The temporal evolution and the regional distribution of B(a)P are captured by the model. In the approach presented here, particle bound B(a)P undergoes degradation by reactions with ozone. In order to assess the importance of the degradation process the results are compared to a model run where no degradation of particle bound B(a)P is considered. It was found that the inclusion of heterogeneous reactions of B(a)P with ozone results in a reduction of the modelled air concentration by approx. a factor of 5. (C) 2009 Elsevier Ltd. All rights reserved.