Abstract
The mass concentrations of atmospheric refractory black carbon (rBC), an important absorber of solar radiation, were continuously measured with a single particle soot photometer (SP2) during wintertime haze period to investigate the transport of pollution to Beijing. The average mass concentration of rBC was 6.1 ± 3.9 μg m-3 during hazy periods, which was 4.7 times higher than it during non-hazy periods. Cluster analysis showed that the air parcels arriving at Beijing mainly originated from the northwest, passed through the south and brought the most polluted air to Beijing. Concentration-weighted trajectory analyses indicated that the central North China Plain were the most likely source region for the rBC that impacted Beijing. Furthermore, the Weather Research and Forecasting-Black Carbon model showed that 71.4-82.0% of the rBC at Beijing was from regional transport during the high rBC episodes and that 47.9-56.8% of the rBC can be attributed to sources in the central North China Plain. These results suggest that regional transport from the central North China Plain, rather than local emissions, was a more important source for rBC pollution in Beijing.
Original language | English |
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Pages (from-to) | 11-18 |
Number of pages | 8 |
Journal | Atmospheric Environment |
Volume | 132 |
DOIs | |
Publication status | Published - 1 May 2016 |
Externally published | Yes |
Keywords
- Beijing
- Black carbon
- Concentration weighted trajectory analysis
- Regional transport
- WRF-BC model
ASJC Scopus subject areas
- General Environmental Science
- Atmospheric Science