在2018-2021年期间,北京的PM_2.5污染事件的区域运输特征

在2018-2021年期间,北京的PM_2.5污染事件的区域运输特征

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Dejia Yin¹, Qian Song¹, Yuanxi Guo²

¹State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China.

Journal of environmental sciences (China)

|December 1, 2024

概括

区域运输对北京的PM2.5污染事件有很大的贡献,东南长途运输是最常见的类型. 优化区域控制策略对于减轻这些污染事件至关重要.

科学领域:

环境科学环境科学
大气化学大气化学
空气质量管理管理空气质量

背景情况:

尽管排放量有所减少,但北京的PM2.5污染仍然存在.
区域运输被确定为这些污染事件的主要驱动因素.
描述区域运输及其来源仍然具有挑战性.

研究的目的:

量化区域交通对北京PM2.5污染的贡献.
根据运输特征确定主要贡献地区并对污染事件类型进行分类.
为优化区域污染控制战略提供见解.

主要方法:

使用了与综合来源分配模型 (ISAM) 集成的社区多级空气质量 (CMAQ) 模型.
分析了2018年至2021年北京的PM2.5污染事件.
按运输方向 (本地,SW,SE,SM) 和距离 (短,长) 分类的污染事件.

主要成果:

区域运输占PM2.5污染事件的61.3%.
山东,河北南部,宝丁和朗是主要贡献的地区.
东南长途 (SE-long) 运输类型是最常见的 (20%),与北京-天津-河北地区的特定风力模式有关.

结论:

区域交通是北京PM2.5污染的一个关键因素.
了解运输类型和来源对于有效的污染控制至关重要.
建议采取优化,区域特定的联合污染控制措施.

关键词:

这就是CMAQ-ISAM.在PM中{2.5)污染事件污染事件区域运输区域运输区域运输

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