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首页> 外文期刊>Atmospheric environment >Influence of grid resolution and meteorological forcing on simulated European air quality: A sensitivity study with the modeling system COSMO-MUSCAT
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Influence of grid resolution and meteorological forcing on simulated European air quality: A sensitivity study with the modeling system COSMO-MUSCAT

机译：网格分辨率和气象强迫对模拟欧洲空气质量的影响：使用建模系统COSMO-MUSCAT进行的敏感性研究

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摘要

Model evaluation studies are essential for determining model performance as well as assessing model deficiencies, and are the focus of the Air Quality Model Evaluation International Initiative (AQMEII). The chemistry-transport model system COSMO—MUSCAT participates in this initiative. In this paper the robustness and variability of the model results against changes in the model setup are analyzed. Special focus is given to the formation of secondary paniculate matter and the ability to reproduce unusually high levels of PM_(10) in Central Europe caused by long-range transported smoke of fires in western Russia. Seven different model configurations are investigated in this study. The COSMO-MUSCAT results are evaluated in comparison with ground-based measurements in Central Europe. The analysis is performed for two selected periods in April/May 2006 and October 2006 which are characterized by elevated concentrations of PM. Furthermore, the sensitivity of the results is studied against the used grid resolution and the meteorological forcing. Here, COSMO-MUSCAT is applied with different horizontal grid sizes and, alternatively, forced by reanalysis data with finer resolution. The use of finer grid resolutions in COSMO-MUSCAT has direct consequences on the meteorological forcing as well as on the calculated emission and deposition rates. The presented results suggest a large impact of the meteorological effects on the PM concentrations. The more accurate spatial appointment of the emissions and deposition fluxes seems to be of little consequence compared to the meteorological forcing.
机译：模型评估研究对于确定模型性能以及评估模型缺陷至关重要，也是国际空气质量模型评估倡议（AQMEII）的重点。化学运输模型系统COSMO-MUSCAT参与了该计划。本文分析了模型结果对模型设置变化的鲁棒性和可变性。特别关注的是二次圆锥状物质的形成以及中西部俄罗斯远距离转移的浓烟引起的异常高水平PM_（10）的复制能力。在这项研究中调查了七个不同的模型配置。与中欧的地面测量结果相比，对COSMO-MUSCAT结果进行了评估。在2006年4月/ 5月和2006年10月的两个选定时期内进行了分析，其特征是PM浓度升高。此外，还针对所使用的网格分辨率和气象强迫研究了结果的敏感性。在此，COSMO-MUSCAT适用于不同的水平网格大小，或者由具有更高分辨率的重新分析数据强制执行。在COSMO-MUSCAT中使用更精细的网格分辨率会对气象强迫以及所计算的排放和沉积速率产生直接影响。提出的结果表明，气象影响对PM浓度有很大影响。与气象强迫相比，排放和沉积通量的更精确的空间分配似乎没有多大意义。

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