Occurrence of atmospheric nitrous acid in the urban area of Beijing (China)

The atmospheric concentrations of nitrous acid (HONO) have been measured during two field campaigns in the winter and summer of 2007 at Beijing (China). The results were discussed from the standpoint of temporal and diurnal variations and meteorological effects. The daily average HONO concentrations...

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Veröffentlicht in:	The Science of the total environment 2013-03, Vol.447, p.210-224
Hauptverfasser:	Spataro, Francesca, Ianniello, Antonietta, Esposito, Giulio, Allegrini, Ivo, Zhu, Tong, Hu, Min
Format:	Artikel
Sprache:	eng
Schlagworte:	Air Pollutants - analysis Annular denuder Applied sciences Atmospheric pollution China Cities Environmental Monitoring - methods Exact sciences and technology Heterogeneous chemistry Hydroxyl radical Nitrogen oxides Nitrogen Oxides - analysis Nitrogen Oxides - chemistry Nitrous acid Nitrous Acid - analysis Pollutants physicochemistry study: properties, effects, reactions, transport and distribution Pollution Urban area
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Beschreibung
Zusammenfassung:	The atmospheric concentrations of nitrous acid (HONO) have been measured during two field campaigns in the winter and summer of 2007 at Beijing (China). The results were discussed from the standpoint of temporal and diurnal variations and meteorological effects. The daily average HONO concentrations were in the range of 0.03–2.91ppb and didn't show temporal variation between the winter and summer periods. The temporal trends seemed to be largely affected by meteorological conditions. HONO concentrations showed very typical diurnal variations during intensive winter and summer periods. Nitrogen oxides were key precursors of HONO formation and the HONO/NO2 values were higher than those reported for direct emission (
ISSN:	0048-9697 1879-1026
DOI:	10.1016/j.scitotenv.2012.12.065