Articles | Volume 23, issue 12
https://doi.org/10.5194/acp-23-7057-2023
https://doi.org/10.5194/acp-23-7057-2023
Research article
 | 
26 Jun 2023
Research article |  | 26 Jun 2023

OH measurements in the coastal atmosphere of South China: possible missing OH sinks in aged air masses

Zhouxing Zou, Qianjie Chen, Men Xia, Qi Yuan, Yi Chen, Yanan Wang, Enyu Xiong, Zhe Wang, and Tao Wang

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Latest update: 22 May 2024
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Short summary
We present OH observation and model simulation results at a coastal site in Hong Kong. The model predicted the OH concentration under high-NOx well but overpredicted it under low-NOx conditions. This implies an insufficient understanding of OH chemistry under low-NOx conditions. We show evidence of missing OH sinks as a possible cause of the overprediction.
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