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| Titel |
Air quality and emissions in the Yangtze River Delta, China |
| VerfasserIn |
L. Li, C. H. Chen, J. S. Fu, C. Huang, D. G. Streets, H. Y. Huang, G. F. Zhang, Y. J. Wang, C. J. Jang, H. L. Wang, Y. R. Chen, J. M. Fu |
| 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 ; 11, no. 4 ; Nr. 11, no. 4 (2011-02-21), S.1621-1639 |
| Datensatznummer |
250009367
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| Publikation (Nr.) |
 copernicus.org/acp-11-1621-2011.pdf |
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| Zusammenfassung |
| Regional trans-boundary air pollution has become an important issue in the
field of air pollution modeling. This paper presents the results of the
implementation of the MM5-CMAQ modeling system in the Yangtze River Delta
(YRD) for the months of January and July of 2004. The meteorological
parameters are obtained by using the MM5 model. A new regional emission
inventory with spatial and temporal allocations based on local statistical
data has been developed to provide input emissions data to the MM5-CMAQ
modeling system. The pollutant concentrations obtained from the MM5-CMAQ
modeling system have been compared with observational data from the national
air pollution monitoring network. It is found that air quality in winter in
the YRD is generally worse than in summer, due mainly to unfavorable
meteorological dispersion conditions. In winter, the pollution transport
from Northern China to the YRD reinforces the pollution caused by large
local emissions. The monthly average concentration of SO2 in the YRD is
0.026 ± 0.011 mg m−3 in January and 0.017 ± 0.009 mg m−3
in July. Monthly average concentrations of NO2 in the YRD in
January and July are 0.021 ± 0.009 mg m−3, and 0.014 ± 0.008 mg m−3,
respectively. The monthly average concentration
of PM10 in the YRD is 0.080 ± 0.028 mg m−3 in January
and 0.025 ± 0.015 mg m−3 in July. Visibility is also a
problem, with average deciview values of 26.4 ± 2.95 dcv in winter and
17.6 ± 3.3 dcv in summer. The ozone concentration in the downtown area of
a city like Zhoushan can be very high, with the highest simulated value
reaching 0.24 mg m−3. In January, the monthly average
concentration of O3 in the YRD is 0.052 ± 0.011 mg m−3,
and 0.054 ± 0.008 mg m−3 in July. Our results show that ozone
and haze have become extremely important issues in the regional air quality.
Thus, regional air pollution control is urgently needed to improve air
quality in the YRD. |
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