上层臭氧入侵促进了冬季地面上的二次气溶形成
Yuzheng Wang1, Yongchun Liu1, Feixue Zheng1
1Aerosol and Haze Laboratory, Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
National science review
|January 26, 2026
概括
上层臭氧入侵 (ULOI) 对地表空气质量产生重大影响. 本研究引入了一种新的方法来识别ULOI事件,并量化它们对中国臭氧和气溶形成的影响.
科学领域:
- 大气化学 大气化学
- 空气污染研究研究
- 环境科学 环境科学
背景情况:
- 上层臭氧侵入 (ULOI) 是表面臭氧的主要来源,影响大气化学和气溶形成.
- 目前用于从地面观测中识别ULOI事件的方法是不够的.
- 了解ULOI对表面大气化学的影响对于空气质量管理至关重要.
研究的目的:
- 开发一种使用地面臭氧测量来识别ULOI事件的新方法.
- 评估ULOI对中国地下臭氧和二次气溶形成的贡献.
- 评估ULOI对大气氧化能力和气溶成分的影响.
主要方法:
- 开发了一种新的方法,通过分析黎明前的臭氧度来识别ULOI事件.
- 在中国的各个地区确定了ULOI事件的频率.
- 量化了ULOI对地面层臭氧度和气溶形成的影响.
主要成果:
- 在中国各地,ULOI事件经常发生,范围从22%到74%,在沿海地区的比率更高.
- ULOI在夜间显著增加地面层臭氧13-43ppbv,白天增加3-14ppbv.
- 乌洛伊增强大气氧化能力,促进硫酸盐和二次有机气溶的形成.
结论:
- 开发的方法提供了一种强大的方法,可以使用地面观测来识别ULOI事件.
- 乌洛伊在中国的表面臭氧水平和气溶形成方面发挥着重要作用.
- 大气层之间的相互作用,特别是ULOI,对于理解和管理表面大气化学是至关重要的.
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