Articles | Volume 22, issue 13
https://doi.org/10.5194/acp-22-8951-2022
https://doi.org/10.5194/acp-22-8951-2022
Research article
 | 
12 Jul 2022
Research article |  | 12 Jul 2022

Budget of nitrous acid (HONO) at an urban site in the fall season of Guangzhou, China

Yihang Yu, Peng Cheng, Huirong Li, Wenda Yang, Baobin Han, Wei Song, Weiwei Hu, Xinming Wang, Bin Yuan, Min Shao, Zhijiong Huang, Zhen Li, Junyu Zheng, Haichao Wang, and Xiaofang Yu

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Cited articles

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Acker, K., Febo, A., Trick, S., Perrino, C., Bruno, P., Wiesen, P., Möller, D., Wieprecht, W., Auel, R., Giusto, M., Geyer, A., Platt, U., and Allegrini, I.: Nitrous acid in the urban area of Rome, Atmos. Environ., 40, 3123–3133, https://doi.org/10.1016/j.atmosenv.2006.01.028, 2006. 
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Ammann, M., Kalberer, M., Jost, D. T., Tobler, L., Rössler, E., Piguet, D., Gäggeler, H. W., and Baltensperger, U.: Heterogeneous production of nitrous acid on soot in polluted air masses, Nature, 395, 157–160, https://doi.org/10.1038/25965, 1998. 
Aubin, D. G. and Abbatt, J. P. D.: Interaction of NO2 with Hydrocarbon Soot: Focus on HONO Yield, Surface Modification, and Mechanism, J. Phys. Chem. A, 111, 6263–6273, https://doi.org/10.1021/jp068884h, 2007. 
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Short summary
We have investigated the budget of HONO at an urban site in Guangzhou. Budget and comprehensive uncertainty analysis suggest that at such locations as ours, HONO direct emissions and NO + OH can become comparable or even surpass other HONO sources that typically receive greater attention and interest, such as the NO2 heterogeneous source and the unknown daytime photolytic source. Our findings emphasize the need to reduce the uncertainties of both conventional and novel HONO sources and sinks.
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