Articles | Volume 21, issue 15
https://doi.org/10.5194/acp-21-11581-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-21-11581-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Photodegradation of atmospheric chromophores: changes in oxidation state and photochemical reactivity
Zhen Mu
School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
Lixin Zhang
School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
Dongjie Guan
School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
Hao Li
School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
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Using an updated soil reactive nitrogen emission scheme in the Unified Inputs for Weather Research and Forecasting coupled with Chemistry (UI-WRF-Chem) model, we investigate the role of soil NO and HONO (Nr) emissions in air quality and temperature in North China. Contributions of soil Nr emissions to O3 and secondary pollutants are revealed, exceeding effects of soil NOx or HONO emission. Soil Nr emissions play an important role in mitigating O3 pollution and addressing climate change.
Huanhuan Zhang, Rui Li, Chengpeng Huang, Xiaofei Li, Shuwei Dong, Fu Wang, Tingting Li, Yizhu Chen, Guohua Zhang, Yan Ren, Qingcai Chen, Ru-jin Huang, Siyu Chen, Tao Xue, Xinming Wang, and Mingjin Tang
Atmos. Chem. Phys., 23, 3543–3559, https://doi.org/10.5194/acp-23-3543-2023, https://doi.org/10.5194/acp-23-3543-2023, 2023
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This work investigated the seasonal variation of aerosol Fe solubility for coarse and fine particles in Xi’an, a megacity in northwestern China severely affected by anthropogenic emission and desert dust aerosol. In addition, we discussed in depth what controlled aerosol Fe solubility at different seasons for coarse and fine particles.
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The photochemical reactions of atmospheric aerosols are complicated, some reaction processes exist which have not been identified at present. This study focuses on a new mechanism of photochemical reactions, namely triplet reactions (3C*), and its potential impact on aerosol aging. This study demonstrate the coupling effect of 3C* formation between different aerosol components. The result is novel and useful in explaining how complex components affect photochemical aging of atmospheric aerosol.
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Short summary
Sunlight affects the life and chemical composition of atmospheric aerosols and thus alters air quality. This study demonstrated that the photo-aging process not only changed the chemical compositions of chromophoric aerosols but also changed the roles of the chromophoric organic matter in the photo-aging process of aerosol. This study adds to our understanding of how sunlight affects chromophoric aerosol aging.
Sunlight affects the life and chemical composition of atmospheric aerosols and thus alters air...
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