 |
| Titel |
Modeling study of PM2.5 pollutant transport across cities in China's Jing–Jin–Ji region during a severe haze episode in December 2013 |
| VerfasserIn |
C. Jiang, H. Wang, T. Zhao, T. Li, H. Che |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 15, no. 10 ; Nr. 15, no. 10 (2015-05-26), S.5803-5814 |
| Datensatznummer |
250119756
|
| Publikation (Nr.) |
 copernicus.org/acp-15-5803-2015.pdf |
|
|
|
|
|
| Zusammenfassung |
| To study the influence of particulate matter (PM) transported from
surrounding regions on the high PM2.5 pollution levels in Beijing, the
GRAPES-CUACE model was used to simulate a serious haze episode that occurred
on 6–7~December 2013. The results demonstrate the model's suitability for
describing haze episodes throughout China, especially in the
Beijing–Tianjin–Hebei (Jing–Jin–Ji) region. A very close positive
correlation was found between the southerly wind speed over the plain to the
south of Beijing and changes in PM2.5 in Beijing, both reaching maximum
values at about 900 hPa, suggesting that the lower atmosphere was the
principal layer for pollutant PM transport from its southern
neighbouring region to Beijing. During
haze episodes, and dependent upon the period, Beijing was either a pollution
source or sink for its surrounding area. PM input from Beijing's environs was
much higher than the output from the city, resulting in the most serious
pollution episode, with the highest PM2.5 values occurring from 00:00 to
10:00 UTC (08:00 to 18:00 LT), 7 December 2013. PM pollutants from the
environs of the city accounted for over 50 % of the maximum PM2.5
values reached in Beijing. At other times, the Beijing area was a net
contributor to pollution in its environs. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|