Open AccessNitrous acid (HONO) and its daytime sources at a rural site during the 2004 PRIDE‐PRD experiment in China
Author(s) -
Su Hang,
Cheng Ya Fang,
Shao Min,
Gao Dong Feng,
Yu Zhong Ying,
Zeng Li Min,
Slanina Jacob,
Zhang Yuan Hang,
Wiedensohler Alfred
Publication year - 2008
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2007jd009060
Subject(s) - daytime , nitrous acid , environmental science , atmospheric sciences , air quality index , meteorology , environmental chemistry , chemistry , geology , geography , inorganic chemistry
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 O 3 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 NO 2 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.