Articles | Volume 21, issue 21
https://doi.org/10.5194/acp-21-16093-2021
https://doi.org/10.5194/acp-21-16093-2021
Research article
 | 
02 Nov 2021
Research article |  | 02 Nov 2021

Influence of atmospheric in-cloud aqueous-phase chemistry on the global simulation of SO2 in CESM2

Wendong Ge, Junfeng Liu, Kan Yi, Jiayu Xu, Yizhou Zhang, Xiurong Hu, Jianmin Ma, Xuejun Wang, Yi Wan, Jianying Hu, Zhaobin Zhang, Xilong Wang, and Shu Tao

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Compared with the observations, the results incorporating detailed cloud aqueous-phase chemistry greatly reduced SO2 overestimation. The biases in annual simulated SO2 concentrations (or mixing ratios) decreased by 46 %, 41 %, and 22 % in Europe, the USA, and China, respectively. Fe chemistry and HOx chemistry contributed more to SO2 oxidation than N chemistry. Higher concentrations of soluble Fe and higher pH values could further enhance the oxidation capacity.
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