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全年分析东亚气溶颗粒中的多相硫酸盐生产情况

Katherine R Travis¹, Benjamin A Nault^2,3, James H Crawford¹

¹NASA Langley Research Center, Hampton, Virginia 23681-2199, United States.

ACS ES&T air

|August 14, 2025

概括

新的二氧化硫 (SO2) 多相氧化路径被添加到GEOS-Chem模型中,改善了东亚的硫酸盐估计. 这项研究突出了气溶化学在模拟全年硫酸盐水平的关键作用.

科学领域:

大气化学大气化学
气溶科学气溶科学
环境建模环境建模

背景情况:

在东亚的雾事件中低估硫酸盐度与当前模型中缺失的硫酸盐生产途径有关.
现有的模型往往无法完全解释气溶颗粒中的二氧化硫 (SO2) 复杂的多相氧化过程.

研究的目的:

在GEOS-Chem模型中纳入和评估SO2的多相氧化途径.
评估这些新途径对东亚不同季节和地点的硫酸盐总产量的贡献.

主要方法:

由过渡金属离子 (TMI) 催化H2O2,O3,NO2,HCHO和O2的SO2氧化被添加到GEOS-Chem模型中.
模型的性能是通过在韩国首尔的地面观测,来自KORUS-AQ运动的空中数据和来自中国北京的地面数据来评估的.

主要成果:

多相化学贡献了14%至90%的硫酸盐总产量,每天平均硫酸盐增加2-3μg m-3 (高达12μg m-3).
氧化途径因季节性变化而变化,H2O2在春季和夏季占主导地位,改善了与观察到的H2O2度的模型协议.
路径的重要性在首尔和北京之间有所不同,受过渡金属水平和混合层深度的影响.

结论:

实施的多相气溶化学对于准确的全年硫酸盐模拟至关重要,而不仅仅是在雾事件期间.
这项研究表明了多相化学的重要合气相和气溶相影响,改善了未来研究的模型能力.

关键词:

在 KORUS-AQQ 中.气溶喷雾剂是一种气溶.东亚东亚亚洲东亚亚洲雾的时间模型模型模型模型模型模型硫酸盐是一种硫酸盐.

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