Numerical Simulation of Topography Impact on Transport and Source Apportionment on PM<sub>2.5</sub> in a Polluted City in Fenwei Plain
The unique energy structure, high intensity of coal production, and complex terrain, make Fenwei Plain a highly polluted region in China. In this study, we characterized the transport characteristic and sources of PM<sub>2.5</sub> (the fraction of particulate matter ≤ 2.5 μm) in Sanmenxi...
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| Format: | Article |
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MDPI AG
2022-01-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/13/2/233 |
| _version_ | 1797482824693972992 |
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| author | Yanyu Li Xuan Wang Jie Li Lingyun Zhu Yong Chen |
| author_facet | Yanyu Li Xuan Wang Jie Li Lingyun Zhu Yong Chen |
| author_sort | Yanyu Li |
| collection | DOAJ |
| description | The unique energy structure, high intensity of coal production, and complex terrain, make Fenwei Plain a highly polluted region in China. In this study, we characterized the transport characteristic and sources of PM<sub>2.5</sub> (the fraction of particulate matter ≤ 2.5 μm) in Sanmenxia, a polluted city in canyon terrain. The results showed that special topography in Sanmenxia had an important role in the transport of particulates. Sanmenxia is located between two northeast-southwest facing mountains, showing a special local circulation. The local circulation was dominated by a downslope wind at nighttime, while the cross−mountain airflow and zonal wind were dominant during the daytime in the canyon terrain. PM<sub>2.5</sub> accumulated near Sanmenxia with the influence of downslope, zonal wind, and topography. The main regional transport paths could be summarized into an eastern path, a northern path, and a western path during the severe haze episodes. The PM<sub>2.5</sub> source apportionment revealed by an on-line tracer-tagged of the Nested Air Quality Prediction Model System (NAQPMS) showed that the main regional sources of Sanmenxia were Yuncheng, Sanmenxia, and Weinan. The contribution to PM<sub>2.5</sub> concentration in Sanmenxia was 39%, 25%, and 11%, respectively. The northern path had the most important impact on Sanmenxia. The results can provide scientific basis for the establishment of severe haze control in Sanmenxia and regional joint control. |
| first_indexed | 2024-03-09T22:38:59Z |
| format | Article |
| id | doaj.art-b5e54cebbee54af58f217863d38305f0 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-09T22:38:59Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-b5e54cebbee54af58f217863d38305f02023-11-23T18:44:18ZengMDPI AGAtmosphere2073-44332022-01-0113223310.3390/atmos13020233Numerical Simulation of Topography Impact on Transport and Source Apportionment on PM<sub>2.5</sub> in a Polluted City in Fenwei PlainYanyu Li0Xuan Wang1Jie Li2Lingyun Zhu3Yong Chen4State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaHenan Key Laboratory of Environmental Monitoring Technology, Zhengzhou 450000, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaInstitute of Meteorological Science of Shanxi Province, Taiyuan 030002, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaThe unique energy structure, high intensity of coal production, and complex terrain, make Fenwei Plain a highly polluted region in China. In this study, we characterized the transport characteristic and sources of PM<sub>2.5</sub> (the fraction of particulate matter ≤ 2.5 μm) in Sanmenxia, a polluted city in canyon terrain. The results showed that special topography in Sanmenxia had an important role in the transport of particulates. Sanmenxia is located between two northeast-southwest facing mountains, showing a special local circulation. The local circulation was dominated by a downslope wind at nighttime, while the cross−mountain airflow and zonal wind were dominant during the daytime in the canyon terrain. PM<sub>2.5</sub> accumulated near Sanmenxia with the influence of downslope, zonal wind, and topography. The main regional transport paths could be summarized into an eastern path, a northern path, and a western path during the severe haze episodes. The PM<sub>2.5</sub> source apportionment revealed by an on-line tracer-tagged of the Nested Air Quality Prediction Model System (NAQPMS) showed that the main regional sources of Sanmenxia were Yuncheng, Sanmenxia, and Weinan. The contribution to PM<sub>2.5</sub> concentration in Sanmenxia was 39%, 25%, and 11%, respectively. The northern path had the most important impact on Sanmenxia. The results can provide scientific basis for the establishment of severe haze control in Sanmenxia and regional joint control.https://www.mdpi.com/2073-4433/13/2/233PM<sub>2.5</sub>Sanmenxiacanyon terraintransportsource apportionment |
| spellingShingle | Yanyu Li Xuan Wang Jie Li Lingyun Zhu Yong Chen Numerical Simulation of Topography Impact on Transport and Source Apportionment on PM<sub>2.5</sub> in a Polluted City in Fenwei Plain Atmosphere PM<sub>2.5</sub> Sanmenxia canyon terrain transport source apportionment |
| title | Numerical Simulation of Topography Impact on Transport and Source Apportionment on PM<sub>2.5</sub> in a Polluted City in Fenwei Plain |
| title_full | Numerical Simulation of Topography Impact on Transport and Source Apportionment on PM<sub>2.5</sub> in a Polluted City in Fenwei Plain |
| title_fullStr | Numerical Simulation of Topography Impact on Transport and Source Apportionment on PM<sub>2.5</sub> in a Polluted City in Fenwei Plain |
| title_full_unstemmed | Numerical Simulation of Topography Impact on Transport and Source Apportionment on PM<sub>2.5</sub> in a Polluted City in Fenwei Plain |
| title_short | Numerical Simulation of Topography Impact on Transport and Source Apportionment on PM<sub>2.5</sub> in a Polluted City in Fenwei Plain |
| title_sort | numerical simulation of topography impact on transport and source apportionment on pm sub 2 5 sub in a polluted city in fenwei plain |
| topic | PM<sub>2.5</sub> Sanmenxia canyon terrain transport source apportionment |
| url | https://www.mdpi.com/2073-4433/13/2/233 |
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