School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
Environmental Research Centre of Beijing-Tianjin-Hebei Region, Chinese Academy of Environmental Planning, Beijing 100012, China.
Int J Environ Res Public Health. 2022 Oct 19;19(20):13512. doi: 10.3390/ijerph192013512.
In recent years, the problem of atmospheric pollution has been concerning in the Beijing-Tianjin-Hebei region, due to the frequent haze. It has become a significant issue to improve regional air quality through appropriate emission reduction measures. In this study, considering the regional atmospheric transmission of air pollutants, the WRF/CALPUFF model (the Weather Research and Forecasting model coupled with the California Puff air quality model) was used to describe the impact of each city's pollutant emissions on the concentrations of every city. Then, a new optimization model was designed to calculate the maximum allowable emissions of every city. The results showed that NOx and PM emissions need to be reduced by 44% and 48%, respectively, in the traditional mitigation scenario (any city's pollutant emissions are not allowed to increase). However, in the optimized scenario, NOx and PM emissions should be reduced by 23% and 46%, respectively, to meet the national secondary standard. The emissions of cities with low transfer coefficients, such as Zhangjiakou, Qinhuangdao, and Chengde, could even be appropriately increased. This means that the optimized scenario could reduce the pressure on emission reduction. Although the optimization results are theoretical and idealistic, this research study provides a new idea for formulating emission mitigation policies in various regions to reduce the impact on the economy.
近年来，由于雾霾频发，京津冀地区的大气污染问题备受关注。通过采取适当的减排措施来改善区域空气质量已成为当务之急。本研究考虑到大气污染物的区域传输，采用 WRF/CALPUFF 模型（天气研究与预测模型与加利福尼亚烟羽空气质量模型的耦合）来描述每个城市的污染物排放对每个城市浓度的影响。然后，设计了一个新的优化模型来计算每个城市的最大允许排放量。结果表明，在传统减排情景下（不允许任何城市的污染物排放增加），NOx 和 PM 排放量分别需要减少 44%和 48%。然而，在优化情景下，NOx 和 PM 排放量应分别减少 23%和 46%，以达到国家二级标准。对于传输系数较低的城市，如张家口、秦皇岛和承德，其排放量甚至可以适当增加。这意味着优化情景可以减轻减排压力。虽然优化结果是理论和理想化的，但本研究为制定各地区减排政策提供了一个新思路，以减轻对经济的影响。
