Impacts of meteorology and emission reductions on haze pollution during the lockdown in the North China Plain
<p>Haze events in the North China Plain (NCP) during the COVID-19 lockdown underscore the intricate challenges of air quality management amid reduced human activities. Utilizing the WRF-Chem model, we explored how sharp emission reductions and varying meteorological conditions influenced fine-...
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Copernicus Publications
2025-02-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/25/1569/2025/acp-25-1569-2025.pdf |
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| author | L. Liu L. Liu X. Long Y. Li Y. Li Z. Zang Z. Zang F. Wang Y. Han Z. Bao Y. Chen T. Feng J. Yang |
| author_facet | L. Liu L. Liu X. Long Y. Li Y. Li Z. Zang Z. Zang F. Wang Y. Han Z. Bao Y. Chen T. Feng J. Yang |
| author_sort | L. Liu |
| collection | DOAJ |
| description | <p>Haze events in the North China Plain (NCP) during the COVID-19 lockdown underscore the intricate challenges of air quality management amid reduced human activities. Utilizing the WRF-Chem model, we explored how sharp emission reductions and varying meteorological conditions influenced fine-particulate-matter (PM<span class="inline-formula"><sub>2.5</sub></span>) concentrations across the NCP. Our analysis highlights a marked regional contrast: in the northern NCP (NNCP), adverse meteorology largely offset emission reductions, resulting in PM<span class="inline-formula"><sub>2.5</sub></span> increases of 30 to 60 <span class="inline-formula">µ</span>g m<span class="inline-formula"><sup>−3</sup></span> during haze episodes. Conversely, the southern NCP (SNCP) benefited from favorable meteorological conditions that, combined with emission reductions, lowered PM<span class="inline-formula"><sub>2.5</sub></span> by 20 to 40 <span class="inline-formula">µ</span>g m<span class="inline-formula"><sup>−3</sup></span>. These findings emphasize the critical role of meteorology in shaping the air quality response to emission changes, particularly in regions like the NNCP, where unfavorable weather patterns can counteract the benefits of emission reductions. Our study provides valuable insights into the complex interplay of emissions, meteorology, and pollutant dynamics, suggesting that adequate air quality strategies must integrate emission controls and meteorological considerations to address regional variations effectively.</p> |
| format | Article |
| id | doaj-art-44822e74425a43e282b8e0e6445c84e3 |
| institution | Kabale University |
| issn | 1680-7316 1680-7324 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj-art-44822e74425a43e282b8e0e6445c84e32025-02-04T11:30:13ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242025-02-01251569158510.5194/acp-25-1569-2025Impacts of meteorology and emission reductions on haze pollution during the lockdown in the North China PlainL. Liu0L. Liu1X. Long2Y. Li3Y. Li4Z. Zang5Z. Zang6F. Wang7Y. Han8Z. Bao9Y. Chen10T. Feng11J. Yang12College of Meteorology and Oceanography, National University of Defense Technology, Changsha, 410073, ChinaKey Laboratory of High Impact Weather (special), China Meteorological Administration, Changsha, 410073, ChinaResearch Center for Atmospheric Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, ChinaCollege of Meteorology and Oceanography, National University of Defense Technology, Changsha, 410073, ChinaKey Laboratory of High Impact Weather (special), China Meteorological Administration, Changsha, 410073, ChinaCollege of Meteorology and Oceanography, National University of Defense Technology, Changsha, 410073, ChinaKey Laboratory of High Impact Weather (special), China Meteorological Administration, Changsha, 410073, ChinaKey Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400030, ChinaResearch Center for Atmospheric Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, ChinaResearch Center for Atmospheric Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, ChinaResearch Center for Atmospheric Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, ChinaDepartment of Geography and Spatial Information Techniques, Ningbo University, Ningbo, 315211, ChinaSchool of Geography and Remote Sensing, Guangzhou University, Guangzhou, 510006, China<p>Haze events in the North China Plain (NCP) during the COVID-19 lockdown underscore the intricate challenges of air quality management amid reduced human activities. Utilizing the WRF-Chem model, we explored how sharp emission reductions and varying meteorological conditions influenced fine-particulate-matter (PM<span class="inline-formula"><sub>2.5</sub></span>) concentrations across the NCP. Our analysis highlights a marked regional contrast: in the northern NCP (NNCP), adverse meteorology largely offset emission reductions, resulting in PM<span class="inline-formula"><sub>2.5</sub></span> increases of 30 to 60 <span class="inline-formula">µ</span>g m<span class="inline-formula"><sup>−3</sup></span> during haze episodes. Conversely, the southern NCP (SNCP) benefited from favorable meteorological conditions that, combined with emission reductions, lowered PM<span class="inline-formula"><sub>2.5</sub></span> by 20 to 40 <span class="inline-formula">µ</span>g m<span class="inline-formula"><sup>−3</sup></span>. These findings emphasize the critical role of meteorology in shaping the air quality response to emission changes, particularly in regions like the NNCP, where unfavorable weather patterns can counteract the benefits of emission reductions. Our study provides valuable insights into the complex interplay of emissions, meteorology, and pollutant dynamics, suggesting that adequate air quality strategies must integrate emission controls and meteorological considerations to address regional variations effectively.</p>https://acp.copernicus.org/articles/25/1569/2025/acp-25-1569-2025.pdf |
| spellingShingle | L. Liu L. Liu X. Long Y. Li Y. Li Z. Zang Z. Zang F. Wang Y. Han Z. Bao Y. Chen T. Feng J. Yang Impacts of meteorology and emission reductions on haze pollution during the lockdown in the North China Plain Atmospheric Chemistry and Physics |
| title | Impacts of meteorology and emission reductions on haze pollution during the lockdown in the North China Plain |
| title_full | Impacts of meteorology and emission reductions on haze pollution during the lockdown in the North China Plain |
| title_fullStr | Impacts of meteorology and emission reductions on haze pollution during the lockdown in the North China Plain |
| title_full_unstemmed | Impacts of meteorology and emission reductions on haze pollution during the lockdown in the North China Plain |
| title_short | Impacts of meteorology and emission reductions on haze pollution during the lockdown in the North China Plain |
| title_sort | impacts of meteorology and emission reductions on haze pollution during the lockdown in the north china plain |
| url | https://acp.copernicus.org/articles/25/1569/2025/acp-25-1569-2025.pdf |
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