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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Exploring the atmospheric chemistry of nitrous acid (HONO) at a rural site in Southern China
Atmospheric Chemistry and Physics, Volume 12, No. 3, Year 2012
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Description
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 ≈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 (Pm) was calculated to be 0.77 ppb h-1 on average. This value compares well to previous measurements in other environments. Our analysis of Pm provides evidence that the photolysis of HNO3 adsorbed on ground surfaces contributes to the HONO formation. © 2012 Author(s).
Authors & Co-Authors
Li, Xiaoqian
China, Beijing
Peking University
Germany, Julich
Forschungszentrum Jülich Gmbh
Brauers, Theo
Germany, Julich
Forschungszentrum Jülich Gmbh
Ḧaseler, Rolf
Germany, Julich
Forschungszentrum Jülich Gmbh
Bohn, Birger
Germany, Julich
Forschungszentrum Jülich Gmbh
Fuchs, Hendrik
Germany, Julich
Forschungszentrum Jülich Gmbh
Hofzumahaus, Andreas
Germany, Julich
Forschungszentrum Jülich Gmbh
Holland, Frank
Germany, Julich
Forschungszentrum Jülich Gmbh
Lou, Shengrong
Germany, Julich
Forschungszentrum Jülich Gmbh
China, Shanghai
Shanghai Jiao Tong University
China, Shanghai
Shanghai Academy of Environmental Sciences
Lu, Keding
China, Beijing
Peking University
Germany, Julich
Forschungszentrum Jülich Gmbh
Rohrer, Franz
Germany, Julich
Forschungszentrum Jülich Gmbh
Hu, Min
China, Beijing
Peking University
Zeng, Liming
China, Beijing
Peking University
Zhang, Yuanhang
China, Beijing
Peking University
Garland, Rebecca M.
Germany, Mainz
Max Planck Institute for Chemistry
South Africa, Pretoria
The Council for Scientific and Industrial Research
Su, Hang
China, Beijing
Peking University
Germany, Mainz
Max Planck Institute for Chemistry
Nowak, Andreas
Germany, Leipzig
Leibniz Institute for Tropospheric Research
Germany, Braunschweig
Physikalisch-technische Bundesanstalt
Wiedensohler, Alfred
Germany, Leipzig
Leibniz Institute for Tropospheric Research
Takegawa, Nobuyuki
Japan, Tokyo
University of Tokyo, Research Center for Advanced Science and Technology
Shao, Min
China, Beijing
Peking University
Wahner, Andreás
Germany, Julich
Forschungszentrum Jülich Gmbh
Statistics
Citations: 193
Authors: 20
Affiliations: 9
Identifiers
Doi:
10.5194/acp-12-1497-2012
ISSN:
16807316
e-ISSN:
16807324