Journal Article

PreJuSER-20012

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Exploring the atmospheric chemistry of nitrous acid (HONO) at a rural site in Southern China

Li, X.FZJ* ; Brauers, T.FZJ* ; Häseler, R.FZJ* ; Bohn, B.FZJ* ; Fuchs, H.FZJ* ; Hofzumahaus, A.FZJ* ; Holland, F.FZJ* ; Lou, S.FZJ* ; Lu, K. D.FZJ* ; Rohrer, F.FZJ* ; Hu, M. ; Zeng, L. M. ; Zhang, Y. H. ; Garland, R. M. ; Su, H. ; Nowak, A. ; Wiedensohler, A. ; Takegawa, N. ; Shao, M. ; Wahner, A.FZJ*

2012
EGU Katlenburg-Lindau

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/7416  doi:10.5194/acp-12-1497-2012

Abstract: 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.

Keyword(s): J

Note: This work was supported by the China National Basic Research and Development Program 2002CB410801, and the National High Technology Research and Development Program of China (863 Program) 2006AA06A301.

---

Contributing Institute(s):

1. Troposphäre (IEK-8)

Research Program(s):

1. Atmosphäre und Klima (P23)

Appears in the scientific report 2012

---

Database coverage:
; ; ; ; Current Contents - Social and Behavioral Sciences ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

---