globalchange  > 影响、适应和脆弱性
DOI: 10.1002/jgrd.50757
论文题名:
Nitrogen dioxide measurement by cavity attenuated phase shift spectroscopy (CAPS) and implications in ozone production efficiency and nitrate formation in Beijing, China
作者: Ge B.; Sun Y.; Liu Y.; Dong H.; Ji D.; Jiang Q.; Li J.; Wang Z.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期:16
起始页码: 9499
结束页码: 9509
语种: 英语
Scopus关键词: Chemical sensors ; Nitrates ; Nitrogen ; Ozone ; Phase shift ; Phase shifters ; Detection limits ; Formation mechanism ; Meteorological condition ; Nitrogen dioxides ; Ozone production ; Phase shift spectroscopy ; Photochemical smog ; Reactive nitrogen species ; Nitrogen oxides ; meteorology ; nitrate ; nitrogen dioxide ; ozone ; particle size ; smog ; spectroscopy ; uncertainty analysis ; volatile organic compound ; Beijing [China] ; China
英文摘要: Nitrogen dioxide (NO2) is a key species in studying photochemical smog and formation mechanisms of nitrate in fine particles. However, the conventional commercially available chemiluminescence (CL)-based method often has uncertainties in measuring NO2 because of interferences with other reactive nitrogen species. In this study, an Aerodyne Cavity Attenuated Phase Shift Spectroscopy (CAPS) NO2 monitor that essentially has no interferences with nitrogen containing species was deployed in Beijing for the first time during August 2012. The CAPS NO2 monitor is highly sensitive with a detection limit (3σ) of 46.6 ppt for 1 min integration. The NO2 measured by CAPS shows overall agreement with that from CL, yet large differences up to 20% were also observed in the afternoon. Further, the discrepancies of NO2 measurements between CAPS and CL appear to be NOz dependent with larger differences at higher NOz concentrations (e.g., > 14 ppb). As a result, the ozone production efficiency of NOx (OPEx) derived from the correlations of Ox-NOz with the CL NO2 can be overestimated by 19-37% in Beijing. The daily OPEx calculated with the CAPS NO2 ranges from 1.0 to 6.8 ppb/ppb with an average (±1σ) of 2.6 (±1.3) for the entire study. The relatively low OPEx and the relationship between OPEx and NOx suggest that ozone production chemistry is VOC sensitive during summer in Beijing. Two case studies further show that high concentrations of NOx can significantly enhance the formation of nitrate in fine particles in the presence of high O3 and favorable meteorological conditions. © 2013. Her Majesty the Queen in Right of Canada. American Geophysical Union.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63386
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Chinese Academy of Sciences, Institute of Atmospheric Physics, Beijing 100029, China; Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan; Laboratory for Climate Studies National Climate Center, China Meteorological Administration, Beijing, China; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing, China

Recommended Citation:
Ge B.,Sun Y.,Liu Y.,et al. Nitrogen dioxide measurement by cavity attenuated phase shift spectroscopy (CAPS) and implications in ozone production efficiency and nitrate formation in Beijing, China[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(16)
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