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| Titel |
Airborne measurements of gas and particle pollutants during CAREBeijing-2008 |
| VerfasserIn |
W. Zhang, T. Zhu, W. Yang, Z. Bai, Y. L. Sun, Y. Xu, B. Yin, X. Zhao |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 1 ; Nr. 14, no. 1 (2014-01-09), S.301-316 |
| Datensatznummer |
250118259
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| Publikation (Nr.) |
 copernicus.org/acp-14-301-2014.pdf |
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| Zusammenfassung |
| Measurements of gaseous pollutants – including ozone (O3), sulfur
dioxide (SO2), nitrogen oxides (NOX = NO + NO2),
carbon monoxide (CO), particle number concentrations (5.6–560 nm and
0.47–30 μm) – and meteorological parameters (T, RH, P) were
conducted during the Campaigns of Air Quality Research in Beijing and
Surrounding Regions in 2008 (CAREBeijing-2008), from 27 August through
13 October 2008. The data from a total 18 flights (70 h flight time) from
near the surface to 2100 m altitude were obtained with a Yun-12 aircraft in
the southern surrounding areas of Beijing (38–40° N,
114–118° E). The objectives of these measurements were to
characterize the regional variation of air pollution during and after the
Olympics of 2008, determine the importance of air mass trajectories and to
evaluate of other factors that influence the pollution characteristics. The
results suggest that there are primarily four distinct sources that
influenced the magnitude and properties of the pollutants in the measured
region based on back-trajectory analysis: (1) southerly transport of air
masses from regions with high pollutant emissions, (2) northerly and
northeasterly transport of less pollutant air from further away, (3) easterly
transport from maritime sources where emissions of gaseous pollutant are less
than from the south but still high in particle concentrations, and (4) the
transport of air that is a mixture from different regions; that is, the air
at all altitudes measured by the aircraft was not all from the same sources.
The relatively long-lived CO concentration is shown to be a possible
transport tracer of long-range transport from the northwesterly direction,
especially at the higher altitudes. Three factors that influenced the size
distribution of particles – i.e., air mass transport direction, ground
source emissions and meteorological influences – are also discussed. |
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