美国东北部臭氧形成归因技术的比较
Qian Shu1, Sergey L Napelenok1, William T Hutzell1
1U.S. Environmental Protection Agency, Research Triangle Park, NC 27711, USA.
概括
在CMAQ模型中,修订后的综合来源分配方法 (ISAM) 提供了灵活的臭氧 (O3) 来源归因. 与OSAT和粗暴力量方法的比较验证了ISAM的有效性.
科学领域:
- 大气化学和空气质量建模
- 环境科学与工程环境科学与工程
背景情况:
- 综合来源分配方法 (ISAM) 是了解空气污染物来源的关键工具.
- 以前的ISAM版本在灵活性方面存在局限性,特别是在臭氧 (O3) 建模方面.
- 空气质量模型的进步需要更新的来源分配技术.
研究的目的:
- 在社区多尺度空气质量 (CMAQ) 模型中记录ISAM的重大更新.
- 评估这些ISAM修订对臭氧及其前体来源分配的影响.
- 为了比较更新的ISAM与其他既定方法 (如OSAT和粗暴武力) 的性能.
主要方法:
- 在CMAQ中修订ISAM算法,以包括多个归因选项 (例如,反应物特定,动态).
- 更新后的ISAM在CMAQ版本v5.3.2及后版本中的实施.
- 用臭氧源分配技术 (OSAT) 和粗力 (BF) 方法对ISAM结果进行比较分析.
- 应用模型在美国东北部以4公里分辨率进行为期2天的夏季案例研究.
主要成果:
- 更新的ISAM为臭氧来源的分配提供了更大的灵活性.
- 在ISAM,OSAT和BF的结果之间发现了总体一致性,验证了新的ISAM算法.
- 差异突出了每个方法的独特特征和潜在的模型制定差异.
- 国际臭氧管理团队 (ISAM) 和OSAT都确定了边界,移动和生物源作为臭氧和氧化物的主要贡献者.
结论:
- 修订后的ISAM为臭氧及其前体提供了有价值和灵活的来源分配能力.
- 更新的ISAM,集成到CMAQ,提供可靠的结果与其他方法相比较.
- 该研究证实了边界,移动和生物源对研究区域空气污染的重大贡献.
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