Nitrous acid (HONO) and its daytime sources at a rural site during the 2004 PRIDE-PRD experiment in China

High HONO level during daytime was observed at a rural site Xinken in southeastern China during the 2004 Program of Regional Integrated Experiments of Air Quality over Pear River Delta (PRIDE‐PRD). The high HONO concentration led to a daytime (9:00–15:00) OH formation up to three times faster than t...

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Bibliographic Details
Published in:Journal of Geophysical Research: Atmospheres 2008-07, Vol.113 (D14), p.np-n/a
Main Authors: Su, Hang, Cheng, Ya Fang, Shao, Min, Gao, Dong Feng, Yu, Zhong Ying, Zeng, Li Min, Slanina, Jacob, Zhang, Yuan Hang, Wiedensohler, Alfred
Format: Article
Language:English
Subjects:
Aerosols
Brackish
China
Daytime
Deltas
Earth sciences
Earth, ocean, space
Exact sciences and technology
Freshwater
Grounds
heterogeneous reactions
HONO
nitrous acid
Pears
photo-enhanced
Photolysis
photolytic
Rural
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Summary:High HONO level during daytime was observed at a rural site Xinken in southeastern China during the 2004 Program of Regional Integrated Experiments of Air Quality over Pear River Delta (PRIDE‐PRD). The high HONO concentration led to a daytime (9:00–15:00) OH formation up to three times faster than that from O3 photolysis. An unexplained daytime HONO source, approximately four times faster than the reaction of OH with NO, has been derived from the HONO budget estimation. According to current understanding, this unknown source was attributed to heterogeneous reactions of NO2 on ground and aerosol surfaces. The good correlation between the unknown source and J values is consistent with the photolytic HONO source observed in laboratory studies.
ISSN:0148-0227
2169-897X
2156-2202
2169-8996
DOI:10.1029/2007JD009060