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潜在HONO来源增强二次污染物的不一致能力:WRF-Chem建模的证据

Jingwei Zhang¹, Haiyan Ran², Yu Qu³

¹Yunnan Key Laboratory of Meteorological Disasters and Climate Resources in the Greater Mekong Subregion, Yunnan University, Kunming 650500, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences, Beijing 100029, China.

Journal of environmental sciences (China)

|August 21, 2025

概括

酸可以显著增加SOA和PAN等二次污染物. 这项研究量化了HONO来源,发现与气溶相关的途径,特别是酸盐光解,对二次污染增强的影响最大.

科学领域:

大气化学
环境科学
空气污染研究

背景情况:

酸 (HONO) 是二次污染物形成的主要热层OH基源.
现有的研究量化了HONO总影响,但缺乏对二次有机气溶 (SOA) 和过氧乙酸盐 (PAN) 的单个来源贡献的详细分析.

研究的目的:

评估单个HONO来源对二次污染物的特定增强能力.
为了比较各种HONO来源的相对贡献,包括交通排放,土壤排放,室内和室外交换,酸盐光解和NO2异质反应.

主要方法:

利用来自中国六个地点的HONO,SOA和PAN的观测数据 (2015-2018).
采用了WRF-Chem模型,包含六个不同的HONO源来模拟它们的贡献.
与HONO相比,SOA和PAN的增量贡献和增强比率 (ER) 的计算.

主要成果:

在城市北京,地面HONO贡献有所不同:交通排放10%至20%,酸盐光解1%至12%,气溶异质反应2%至10%,地面异质反应50%至70%.
与交通排放 (∼0.3) 和室内外交换 (∼0.1) 相比,二次污染物的增强比率 (ER) 显示酸盐光解 (∼7) 和气溶异质反应 (∼2) 的影响更大.
与气溶相关的HONO来源,特别是酸盐光解,显示出更大的二次污染能力.

结论:

HONO来源增强二次污染物的能力取决于来源,与气溶相关的来源更为重要.
未来的研究应优先评估HONO来源的现实影响以及酸盐光解频率和吸收系数的关键作用.
与气溶相关的HONO来源,特别是酸盐光解,在推动二次污染方面发挥着更为重要的作用.

关键词:

大气氧化能力亚酸过氧乙酸盐二次有机气溶垂直配置文件 WRF-Chem公司

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