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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
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Volume 18, issue 3
Atmos. Chem. Phys., 18, 1977–1996, 2018
https://doi.org/10.5194/acp-18-1977-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Chem. Phys., 18, 1977–1996, 2018
https://doi.org/10.5194/acp-18-1977-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 12 Feb 2018

Research article | 12 Feb 2018

Nitrous acid formation in a snow-free wintertime polluted rural area

Catalina Tsai et al.

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Nitrous acid (HONO) photolysis is an important source of hydroxyl radicals (OH). Vertical HONO fluxes, observed in the snow-free, wintertime Uintah Basin, Utah, USA, show that chemical formation of HONO on the ground closes the HONO budget. Under high NOx conditions, HONO formation is most likely due to photo-enhanced conversion of NO2 on the ground. Under moderate to low NO2 conditions, photolysis of HNO3 on the ground seems to be the most likely source of HONO.
Nitrous acid (HONO) photolysis is an important source of hydroxyl radicals (OH). Vertical HONO...
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