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| Titel |
Atmospheric reactive nitrogen concentrations at ten sites with contrasting land use in an arid region of central Asia |
| VerfasserIn |
K. H. Li, W. Song, X. J. Liu, J. L. Shen, X. S. Luo, X. Q. Sui, B. Liu, Y. K. Hu, P. Christie, C. Y. Tian |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 9, no. 10 ; Nr. 9, no. 10 (2012-10-18), S.4013-4021 |
| Datensatznummer |
250007334
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| Publikation (Nr.) |
 copernicus.org/bg-9-4013-2012.pdf |
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| Zusammenfassung |
| Atmospheric concentrations of reactive nitrogen (Nr) species from 2009 to
2011 are reported for ten sites in Xinjiang, China, an arid region of
central Asia. Concentrations of NH3, NO2, particulate ammonium and
nitrate (pNH4+ and pNO3−) showed large spatial and
seasonal variation and averaged 7.71, 9.68, 1.81 and 1.13 μg N m−3, and PM10
concentrations averaged 249.2 μg m−3 across all sites. Lower NH3 concentrations and higher
NO2, pNH4+ and pNO3− concentrations were
found in winter, reflecting serious air pollution due to domestic heating in
winter and other anthropogenic sources such as increased emissions from
motor traffic and industry. The increasing order of total concentrations of
Nr species was alpine grassland; desert, desert-oasis ecotone; desert
in an oasis; farmland; suburban and urban ecosystems. Lower ratios of
secondary particles (NH4+ and NO3−) were found in the
desert and desert-oasis ecotone, while urban and suburban areas had higher
ratios, which implied that anthropogenic activities have greatly influenced
local air quality and must be controlled. |
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