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| Titel |
Feasibility and difficulties of China's new air quality standard compliance: PRD case of PM2.5 and ozone from 2010 to 2025 |
| VerfasserIn |
H. Liu, X. M. Wang, J. M. Pang, K. B. He |
| 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 ; 13, no. 23 ; Nr. 13, no. 23 (2013-12-11), S.12013-12027 |
| Datensatznummer |
250085872
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| Publikation (Nr.) |
 copernicus.org/acp-13-12013-2013.pdf |
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| Zusammenfassung |
| Improving the air quality in China is a long and arduous task. Although
China has made very aggressive plans for air pollutant control, the
difficulties in achieving the new air quality goals are still significant. A
lot of cities are developing their implementation plan (CIP) for new air
quality goals. In this study, a southern city, Guangzhou, has been selected to
analyze the feasibility and difficulties of new air quality standard
compliance, as well as the CIP evaluation. A comprehensive study of the air
quality status in Guangzhou and the surrounding area was conducted using 22
monitoring sites collection data for O3, PM2.5 and PM10. The
monthly non-attainment rates for O3 vary from 7 to 25% for May to
November. The city average PM2.5 concentration was 53 μg m−3
in Guangzhou in 2010, which needs to be reduced by at least 34%
to achieve the target of 35 μg m−3. The PM2.5 high
violation months are from November to March. A CIP was developed for
Guangzhou, which focused on PM2.5. Based on the CIP, the emission
amounts of NOx, PM10, PM2.5 and volatile organic compounds (VOCs) in 2025 would be controlled
to 119, 61, 26 and 163 thousand tons, respectively, reduced by 51.9%,
55.9%, 61.8% and 41.3%, respectively, compared to 2010. Analysis of air quality
using the model MM5-STEM suggests that the long-term control measures would
achieve the PM2.5 and PM10 goals successfully by 2025. The
PM2.5 annual average concentration would be reduced to 27 μg m−3
in 2025. However, such PM2.5-based emission control scenarios
may enhance the ozone pollution problems. The O3 non-attainment rate
would increase from 7.1% in 2010 to 12.9% in 2025, implying that ozone
will likely become a major compliance issue with the new national ambient air quality standards (NAAQS). This
suggests that O3 control must be taken into account while designing
PM2.5 control strategies, especially PM2.5 compliance under
increased atmospheric oxidation, and for VOCs / NOx reduction ratios need to
be further investigated, in order to eventually achieve O3–PM2.5
co-improvement in this region or other cities. |
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