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大气氧化能力对兰州大气颗粒物度的影响

Xiyin Zhou¹, Xiaoqing Gao², Yi Chang³

¹Northwest Institute of Eco-Environment and Resources/Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Chinese Academy of Sciences, Lanzhou, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China.

The Science of the total environment

|January 1, 2024

概括

兰州的大气氧化能力 (AOC) 在夏季最高,冬季最低. 臭氧 (O3) 显著影响了AOC,影响了二次颗粒的形成.

科学领域:

大气化学大气化学
环境科学环境科学
空气质量研究空气质量研究

背景情况:

大气氧化能力 (AOC) 量化了污染物去除速度,这对于了解颗粒物形成至关重要.
AOC的特点是氧化剂度和总反应速率,作为大气变化的关键指标.
兰州的空气质量受到影响影响污染物度的复杂大气过程.

研究的目的:

在2020-2021年期间分析兰州大气氧化剂的特性.
估计大气氧化特性对二次颗粒物产生的影响.
研究大气氧化剂与空气质量指标之间的关系.

主要方法:

来自兰州大气综合观测站 (2020-2021) 的数据收集.
应用经验方程来建模二次颗粒物形成.
对氧化剂度 (Ox,O3,NO2) 和它们与颗粒物及其相关比率 (SOR,NOR) 的统计分析.

主要成果:

年平均Ox度为146μg/m3 (2020) 和139μg/m3 (2021).
AOC在夏季达到峰值,在冬季最低,臭氧 (O3) 与氧气的相关性比二氧化 (NO2) 更强.
低AOC水平促进了VOC氧化和二次气溶的形成,而高Ox水平显示了与颗粒物,SOR和NOR的负相关性,表明SO2和NO2转化受到了抑制.

结论:

臭氧是影响兰州大气氧化能力的主要因素.
大气氧化过程对兰州的二次颗粒物形成有显著的贡献.
高氧化剂水平可能会抑制SO2和NO2的转化,影响空气质量动态.

关键词:

大气综合观测站大气综合观测站大气氧化能力的大气氧化能力.大气中的颗粒物是大气中的颗粒物.兰州兰州兰州十三) 的情况.

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