在首尔大都会地区使用CMAQQ助理对表面臭氧来源贡献的案例研究
Arash Kashfi Yeganeh1, Mahmoudreza Momeni1, Yunsoo Choi1
1Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX, USA.
概括
来自东亚的跨境臭氧 (O3) 污染对韩国产生重大影响,海外的排放对首尔大都会地区 (SMA) 的超标事件作出了重大贡献. 这项研究量化了区域影响,强调了在空气质量管理方面需要国际合作的必要性.
科学领域:
- 大气化学和物理大气化学和物理
- 空气质量建模和评估.
- 环境科学与政策
背景情况:
- 首尔大都市区 (SMA) 的臭氧 (O3) 超值事件受到当地和跨境排放的影响.
- 了解O3前体的来源归因对于韩国有效的空气质量管理至关重要.
研究的目的:
- 量化调查臭氧及其前体对SMA中O3超值事件的跨境运输和来源贡献.
- 利用社区多级空气质量 (CMAQ) 辅助模型来确定SMA O3水平对各种东亚地区排放的敏感性.
主要方法:
- 使用CMAQ辅助技术计算SMA中的O3的基于排放和基于度的灵敏度.
- 分析了来自韩国本地排放和海外地区的贡献,包括北京-天津-河北 (BTH),山东,长江三角洲 (YRD) 和中国中部.
- 使用HYSPLIT反向轨迹分析来确认空中包裹的移动.
主要成果:
- 海外前体排放和O3对SMA的O3超值事件有显著的贡献.
- 山东,YRD,中国中部和BTH排放分别为11.42,4.28,1.24和0.9ppb的O3超值.
- 韩国的排放量贡献了31.1 ppb,而来自中国东部以外的背景O3增加了19.3 ppb.
结论:
- 当地和区域的前体排放都在SMA的O3超值事件中发挥着关键作用.
- 跨境污染物运输具有重大影响,需要国际合作来改善空气质量.
- CMAQ辅助技术为了解和减轻大都市地区O3影响提供了有价值的框架.
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