Analysis of the Impact of Meteorological Factors on Ambient Air Quality during the COVID-19 Lockdown in Jilin City in 2022
This paper explored the changes of six significant pollutants (PM<sub>2.5</sub>, PM<sub>10</sub>, SO<sub>2</sub>, NO<sub>2</sub>, O<sub>3</sub>, and CO) in Jilin City during the coronavirus disease 2019 (COVID-19) epidemic in 2022, and comp...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/14/2/400 |
| _version_ | 1797622417521115136 |
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| author | Ju Wang Weihao Shi Kexin Xue Tong Wu Chunsheng Fang |
| author_facet | Ju Wang Weihao Shi Kexin Xue Tong Wu Chunsheng Fang |
| author_sort | Ju Wang |
| collection | DOAJ |
| description | This paper explored the changes of six significant pollutants (PM<sub>2.5</sub>, PM<sub>10</sub>, SO<sub>2</sub>, NO<sub>2</sub>, O<sub>3</sub>, and CO) in Jilin City during the coronavirus disease 2019 (COVID-19) epidemic in 2022, and compared them with the same period of previous years to analyze the impact of anthropogenic emissions on the concentration of pollutants; The Weather Research and Forecasting Community Multiscale Air Quality (WRF–CMAQ) model was used to evaluate the effect of meteorological factors on pollutant concentration. The results showed that except for O<sub>3</sub>, the concentrations of the other five pollutants decreased significantly, with a range of 21–47%, during the lockdown period caused by the government’s shutdown and travel restrictions. Compared with the same period in 2021, the decrease of PM<sub>2.5</sub> was only 25% of PM<sub>10</sub>. That was because there was still a large amount of PM<sub>2.5</sub> produced by coal-fired heating during the blockade period, which made the decrease of PM<sub>2.5</sub> more minor. A heavy pollution event caused by adverse meteorological conditions was found during the lockdown period, indicating that only controlling artificial emissions cannot eliminate the occurrence of severe pollution events. The WRF–CMAQ results showed that the lower pollutant concentration in 2022 was not only caused by the reduction of anthropogenic emissions but also related to the influence of favorable meteorological factors (higher planetary boundary layer thickness, higher wind speed, and higher temperature). |
| first_indexed | 2024-03-11T09:09:59Z |
| format | Article |
| id | doaj.art-6e8977ee3c914f2a9528c285e7022bc3 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-11T09:09:59Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-6e8977ee3c914f2a9528c285e7022bc32023-11-16T19:04:19ZengMDPI AGAtmosphere2073-44332023-02-0114240010.3390/atmos14020400Analysis of the Impact of Meteorological Factors on Ambient Air Quality during the COVID-19 Lockdown in Jilin City in 2022Ju Wang0Weihao Shi1Kexin Xue2Tong Wu3Chunsheng Fang4College of New Energy and Environment, Jilin University, Changchun 130012, ChinaCollege of New Energy and Environment, Jilin University, Changchun 130012, ChinaCollege of New Energy and Environment, Jilin University, Changchun 130012, ChinaChina Coal Technology & Engineering Group Shenyang Engineering Company, Shenyang 113122, ChinaCollege of New Energy and Environment, Jilin University, Changchun 130012, ChinaThis paper explored the changes of six significant pollutants (PM<sub>2.5</sub>, PM<sub>10</sub>, SO<sub>2</sub>, NO<sub>2</sub>, O<sub>3</sub>, and CO) in Jilin City during the coronavirus disease 2019 (COVID-19) epidemic in 2022, and compared them with the same period of previous years to analyze the impact of anthropogenic emissions on the concentration of pollutants; The Weather Research and Forecasting Community Multiscale Air Quality (WRF–CMAQ) model was used to evaluate the effect of meteorological factors on pollutant concentration. The results showed that except for O<sub>3</sub>, the concentrations of the other five pollutants decreased significantly, with a range of 21–47%, during the lockdown period caused by the government’s shutdown and travel restrictions. Compared with the same period in 2021, the decrease of PM<sub>2.5</sub> was only 25% of PM<sub>10</sub>. That was because there was still a large amount of PM<sub>2.5</sub> produced by coal-fired heating during the blockade period, which made the decrease of PM<sub>2.5</sub> more minor. A heavy pollution event caused by adverse meteorological conditions was found during the lockdown period, indicating that only controlling artificial emissions cannot eliminate the occurrence of severe pollution events. The WRF–CMAQ results showed that the lower pollutant concentration in 2022 was not only caused by the reduction of anthropogenic emissions but also related to the influence of favorable meteorological factors (higher planetary boundary layer thickness, higher wind speed, and higher temperature).https://www.mdpi.com/2073-4433/14/2/400WRF–CMAQmeteorological factorsCOVID-19air pollution |
| spellingShingle | Ju Wang Weihao Shi Kexin Xue Tong Wu Chunsheng Fang Analysis of the Impact of Meteorological Factors on Ambient Air Quality during the COVID-19 Lockdown in Jilin City in 2022 Atmosphere WRF–CMAQ meteorological factors COVID-19 air pollution |
| title | Analysis of the Impact of Meteorological Factors on Ambient Air Quality during the COVID-19 Lockdown in Jilin City in 2022 |
| title_full | Analysis of the Impact of Meteorological Factors on Ambient Air Quality during the COVID-19 Lockdown in Jilin City in 2022 |
| title_fullStr | Analysis of the Impact of Meteorological Factors on Ambient Air Quality during the COVID-19 Lockdown in Jilin City in 2022 |
| title_full_unstemmed | Analysis of the Impact of Meteorological Factors on Ambient Air Quality during the COVID-19 Lockdown in Jilin City in 2022 |
| title_short | Analysis of the Impact of Meteorological Factors on Ambient Air Quality during the COVID-19 Lockdown in Jilin City in 2022 |
| title_sort | analysis of the impact of meteorological factors on ambient air quality during the covid 19 lockdown in jilin city in 2022 |
| topic | WRF–CMAQ meteorological factors COVID-19 air pollution |
| url | https://www.mdpi.com/2073-4433/14/2/400 |
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