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| 论文编号: |
52 |
| 论文题目: |
Contributions of trans-boundary transport to summertime air quality in Beijing, China |
| 英文论文题目: |
Contributions of trans-boundary transport to summertime air quality in Beijing, China |
| 第一作者: |
Wu, JR |
| 英文第一作者: |
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| 联系作者: |
Li Guohui，Cao Junji |
| 英文联系作者: |
Li Guohui，Cao Junji |
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| 发表年度: |
2017 |
| 卷: |
17 |
| 期: |
3 |
| 页码: |
2035-2051 |
| 摘要: |
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| 英文摘要: |
In the present study, the WRF-CHEM model is used to evaluate the contributions of trans-boundary transport to the air quality in Beijing during a persistent air pollution episode from 5 to 14 July 2015 in Beijing-Tianjin-Hebei (BTH), China. Generally, the predicted temporal variations and spatial distributions of PM2.5 (fine particulate matter), O-3 (ozone), and NO2 are in good agreement with observations in BTH. The WRF-CHEM model also reproduces reasonably well the temporal variations of aerosol species compared to measurements in Beijing. The factor separation approach is employed to evaluate the contributions of transboundary transport of non-Beijing emissions to the PM2.5 and O-3 levels in Beijing. On average, in the afternoon during the simulation episode, the local emissions contribute 22.4% to the O-3 level in Beijing, less than 36.6% from non-Beijing emissions. The O-3 concentrations in Beijing are decreased by 5.1% in the afternoon due to interactions between local and non-Beijing emissions. The non-Beijing emissions play a dominant role in the PM2.5 level in Beijing, with a contribution of 61.5 %, much higher than 13.7 %, from Beijing local emissions. The emission interactions between local and non-Beijing emissions enhance the PM2.5 concentrations in Beijing, with a contribution of 5.9 %. Therefore, the air quality in Beijing is generally determined by the trans-boundary transport of non-Beijing emissions during summertime, showing that the cooperation with neighboring provinces to mitigate pollutant emissions is key for Beijing to improve air quality. |
| 刊物名称: |
ATMOSPHERIC CHEMISTRY AND PHYSICS |
| 英文刊物名称: |
ATMOSPHERIC CHEMISTRY AND PHYSICS |
| 论文全文: |
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| 英文论文全文: |
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| 全文链接: |
http://www.atmos-chem-phys.net/17/2035/2017/ |
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