This title appears in the Scientific Report :
2012
Please use the identifier:
http://hdl.handle.net/2128/7416 in citations.
Please use the identifier: http://dx.doi.org/10.5194/acp-12-1497-2012 in citations.
Exploring the atmospheric chemistry of nitrous acid (HONO) at a rural site in Southern China
Exploring the atmospheric chemistry of nitrous acid (HONO) at a rural site in Southern China
We performed measurements of nitrous acid (HONO) during the PRIDE-PRD2006 campaign in the Pearl River Delta region 60 km north of Guangzhou, China, for 4 weeks in June 2006. HONO was measured by a LOPAP in-situ instrument which was setup in one of the campaign supersites along with a variety of inst...
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Personal Name(s): | Li, X. |
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Brauers, T. / Häseler, R. / Bohn, B. / Fuchs, H. / Hofzumahaus, A. / Holland, F. / Lou, S. / Lu, K.D. / Rohrer, F. / Hu, M. / Zeng, L.M. / Zhang, Y.H. / Garland, R.M. / Su, H. / Nowak, A. / Wiedensohler, A. / Takegawa, N. / Shao, M. / Wahner, A. | |
Contributing Institute: |
Troposphäre; IEK-8 |
Published in: | Atmospheric chemistry and physics, 12 (2012) S. 1497 - 1513 |
Imprint: |
Katlenburg-Lindau
EGU
2012
|
Physical Description: |
1497 - 1513 |
DOI: |
10.5194/acp-12-1497-2012 |
Document Type: |
Journal Article |
Research Program: |
Atmosphäre und Klima |
Series Title: |
Atmospheric Chemistry and Physics
12 |
Subject (ZB): | |
Link: |
Get full text OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.5194/acp-12-1497-2012 in citations.
We performed measurements of nitrous acid (HONO) during the PRIDE-PRD2006 campaign in the Pearl River Delta region 60 km north of Guangzhou, China, for 4 weeks in June 2006. HONO was measured by a LOPAP in-situ instrument which was setup in one of the campaign supersites along with a variety of instruments measuring hydroxyl radicals, trace gases, aerosols, and meteorological parameters. Maximum diurnal HONO mixing ratios of 1-5 ppb were observed during the nights. We found that the nighttime build-up of HONO can be attributed to the heterogeneous NO2 to HONO conversion on ground surfaces and the OH + NO reaction. In addition to elevated nighttime mixing ratios, measured noontime values of approximate to 200 ppt indicate the existence of a daytime source higher than the OH + NO -> HONO reaction. Using the simultaneously recorded OH, NO, and HONO photolysis frequency, a daytime additional source strength of HONO (P-M) was calculated to be 0.77 ppb h(-1) on average. This value compares well to previous measurements in other environments. Our analysis of P-M provides evidence that the photolysis of HNO3 adsorbed on ground surfaces contributes to the HONO formation. |