Articles | Volume 15, issue 16
Atmos. Chem. Phys., 15, 9381–9398, 2015
https://doi.org/10.5194/acp-15-9381-2015
Atmos. Chem. Phys., 15, 9381–9398, 2015
https://doi.org/10.5194/acp-15-9381-2015

Research article 21 Aug 2015

Research article | 21 Aug 2015

Impacts of an unknown daytime HONO source on the mixing ratio and budget of HONO, and hydroxyl, hydroperoxyl, and organic peroxy radicals, in the coastal regions of China

Y. Tang et al.

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Short summary
High daytime HONO mixing ratios in experiments suggest that an unknown daytime HONO source (P unknown) could exist. P unknown≈19.60×NO2×J(NO2) was obtained using observed data from 13 field experiments across the globe, then coupled into the WRF-Chem model. Simulations indicated that elevated P unknown was found in the coastal regions of China; the additional HONO sources, especially the P unknown produced significant increases of radicals in the major cities, and accelerated the radical cycles.
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