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Istituto sull'inquinamento atmosferico

Torna all'elenco Contributi in rivista anno 2010

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Occurrence of gas phase ammonia in the area of Beijing (China)

Anno di pubblicazione: 2010

Formato: Elettronico

Autori: Ianniello, A. (1); Spataro, F. (1); Esposito, G.(1); Allegrini, I. (1); Rantica, E.(1); Ancora, M.P. (1); Hu, M. (2); Zhu, T. (2);

Affiliazioni autori: 1) CNR - Institute of Atmospheric Pollution Research, Via Salaria Km 29.3, CP10, 00015 Monterotondo S., Rome, Italy; 2) State Key Joint Laboratory for Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China;

Autori CNR:

  • IVO ALLEGRINI
  • MARIA PIA ANCORA
  • GIULIO ESPOSITO
  • ANTONIETTA IANNIELLO
  • ELENA RANTICA
  • FRANCESCA SPATARO

Lingua: inglese

Abstract: The atmospheric concentrations of gaseous ammonia have been measured during two field campaigns in the winter and in the summer of 2007 at Beijing (China). These measurements were carried out by means of diffusion annular denuders coated with phosphorous acid. The results were discussed from the standpoint of temporal and diurnal variations and meteorological effects. The daily average NH(3) concentrations were in the range of 0.20-44.38 mu g/m(3) and showed regular temporal variations with higher concentrations during summer and with lower during winter. The temporal trends seemed to be largely affected by air temperature because of agricultural sources. No diurnal variability was observed for gaseous NH(3) levels in both winter and summer seasons. The highest ammonia value of 105.67 mu g/m(3) was measured in the early morning during the summer period when stable atmospheric conditions occurred. The diurnal winter and summer trends of ammonia showed a weak dependence on the air temperature and they were affected nearly by wind direction suggesting regional and local source influences. Ammonia was also correlated with the atmospheric mixing in the boundary layer, and, with NO(x), CO and PM(2.5) air concentrations supporting the hypothesis that the traffic may be also an important source of ammonia in Beijing.

Pagine da: 9487

Pagine a: 9503

Pagine totali: 17

Rivista:

Atmospheric chemistry and physics Copernicus Publ.
Paese di pubblicazione: Germania
Lingua: inglese
ISSN: 1680-7324

Numero volume: 10

Numero fascicolo: 19

DOI: 10.5194/acp-10-9487-2010

Referee: Sė: Internazionale

Indicizzato da: ISI Web of Science (WOS) [000283066300017]

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