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This paper made an overview and introduction of urban PM2.5 numerical forecast models in China, and mainly introduced air quality simulated forecast system of Beijing, Shanghai, and Nanjing. On this basis, it discussed development direction and existing problems of urban PM2.5 forecast models in China. Besides, it revealed significance of numerical models for air quality forecast. In a heavy air pollution of Beijing – Tianjin – Hebei in October 6 -12 of 2014, the forecast results indicated that pollutants flow from south to north, so the regional transport exerts great influence on concentration of PM2.5.


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