一种建模方法,以动态估计局部光化学过程及其对表面污染的贡献
Saisai Chen1, Wei Wei2, Chuanda Wang1
1Department of Environmental Science and Engineering, Beijing University of Technology, Beijing, 100124, China.
Journal of environmental management
|November 29, 2024
概括
这项研究量化了中国北部局部臭氧 (O3) 的形成,揭示了它对城市空气污染的重大贡献. 开发的模型有助于针对有效的臭氧减少策略.
科学领域:
- 大气化学 大气化学
- 环境科学 环境科学
- 空气质量建模空气质量模型
背景情况:
- 城市臭氧 (O3) 污染源于当地的光化学和远程运输.
- 表面O3是城市地区的主要空气污染物,影响公众健康.
- 现有的模型难以动态区分当地O3贡献.
研究的目的:
- 开发一种新的建模方法来量化城市环境中的当地的光化学臭氧产量 (Chem_O3).
- 评估当地O3形成对不同类型城市整体表面O3污染的作用.
- 为了明智的政策制定,将当地O3贡献与物理运输分开.
主要方法:
- 使用ISAM模型来确定O3对局部NOx排放的每小时反应 (R_O3-NO2).
- 将R_O3-NO2与环境NO2度相结合,以量化时间变化的Chem_O3.
- 分析了Chem_O3及其比例 (Chem%) 与各种北BTH城市地区的总O3的关系.
主要成果:
- 当地光化学臭氧 (Chem_O3) 在主要北BTH城市地区占总O3的46.7%-62.6%.
- 根据城市类型的Chem_O3贡献有所不同:大城市 > 工业化 > 正常 > 森林城市.
- 每日Chem%的趋势与每日O3不同,除了大城市之外,大多数城市的负相关性.
结论:
- 开发的方法有效量化了当地的臭氧形成及其对城市空气质量的影响.
- 研究结果强调了当地的光化学在臭氧污染中的重要作用,指导了有针对性的减少策略.
- 该方法有助于环境管理人员制定有效的臭氧减排政策.
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