Effects of COVID-19 Emergency Response Levels on Air Quality in the Guangdong-Hong Kong-Macao Greater Bay Area, China
Abstract The COVID-19 pandemic has affected air quality due to extreme changes in human behavior. We assessed the air quality response to different emergency levels during different COVID-19 periods and the naught period in the Guangdong-Hong Kong-Macao Greater Bay Area (GBA). We obtained the follow...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Springer
2020-10-01
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| Series: | Aerosol and Air Quality Research |
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| Online Access: | https://doi.org/10.4209/aaqr.2020.07.0416 |
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| _version_ | 1823862807026728960 |
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| author | Jie Li Haotian Yang Shuping Zha Nu Yu Xingang Liu Ruofei Sun |
| author_facet | Jie Li Haotian Yang Shuping Zha Nu Yu Xingang Liu Ruofei Sun |
| author_sort | Jie Li |
| collection | DOAJ |
| description | Abstract The COVID-19 pandemic has affected air quality due to extreme changes in human behavior. We assessed the air quality response to different emergency levels during different COVID-19 periods and the naught period in the Guangdong-Hong Kong-Macao Greater Bay Area (GBA). We obtained the following conclusions: (1) The measures implemented to prevent and control of COVID-19 directly impacted ambient air pollutants. The air quality index and the concentrations of NO2, PM2.5, PM10, and CO in the GBA for 1–19 January 2020 declined 19.4%, 16.7%, 27.5%, 15.8%, and 25.7%, respectively, compared to the same time period in 2016–2019. (2) The reduction in air pollution was strongly associated with the first-level emergency response during this pandemic. The AQI, NO2, PM2.5, PM10, O3, and CO in the GBA decreased by 37.4%, 47.0%, 40.5%, 44.8%, 6.7%, and 24.1%, respectively. We found no statistically significant difference in the concentrations of different pollutants, except for NO2, during the second- and third-level responses. (3) The higher the emergency response level, the greater the NO2 pollutants reduction. The NO2 concentration was reduced by 47.0%, 25.5%, and 12.1% at emergency response levels 1, 2, and 3, respectively. The results highlight the importance of understanding the role of emergency response in air quality, and provide reference for authorities to formulate more scientific and reasonable emergency responses to epidemic prevention and control. |
| format | Article |
| id | doaj-art-53edd5ff2035436fb174a76fd5348048 |
| institution | Kabale University |
| issn | 1680-8584 2071-1409 |
| language | English |
| publishDate | 2020-10-01 |
| publisher | Springer |
| record_format | Article |
| series | Aerosol and Air Quality Research |
| spelling | doaj-art-53edd5ff2035436fb174a76fd53480482025-02-09T12:21:36ZengSpringerAerosol and Air Quality Research1680-85842071-14092020-10-012121910.4209/aaqr.2020.07.0416Effects of COVID-19 Emergency Response Levels on Air Quality in the Guangdong-Hong Kong-Macao Greater Bay Area, ChinaJie Li0Haotian Yang1Shuping Zha2Nu Yu3Xingang Liu4Ruofei Sun5College of Civil Aviation, Nanjing, University of Aeronautics and AstronauticsCollege of Civil Aviation, Nanjing, University of Aeronautics and AstronauticsWuhu Institute of TechnologyCollege of Civil Aviation, Nanjing, University of Aeronautics and AstronauticsState Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal UniversityCollege of Civil Aviation, Nanjing, University of Aeronautics and AstronauticsAbstract The COVID-19 pandemic has affected air quality due to extreme changes in human behavior. We assessed the air quality response to different emergency levels during different COVID-19 periods and the naught period in the Guangdong-Hong Kong-Macao Greater Bay Area (GBA). We obtained the following conclusions: (1) The measures implemented to prevent and control of COVID-19 directly impacted ambient air pollutants. The air quality index and the concentrations of NO2, PM2.5, PM10, and CO in the GBA for 1–19 January 2020 declined 19.4%, 16.7%, 27.5%, 15.8%, and 25.7%, respectively, compared to the same time period in 2016–2019. (2) The reduction in air pollution was strongly associated with the first-level emergency response during this pandemic. The AQI, NO2, PM2.5, PM10, O3, and CO in the GBA decreased by 37.4%, 47.0%, 40.5%, 44.8%, 6.7%, and 24.1%, respectively. We found no statistically significant difference in the concentrations of different pollutants, except for NO2, during the second- and third-level responses. (3) The higher the emergency response level, the greater the NO2 pollutants reduction. The NO2 concentration was reduced by 47.0%, 25.5%, and 12.1% at emergency response levels 1, 2, and 3, respectively. The results highlight the importance of understanding the role of emergency response in air quality, and provide reference for authorities to formulate more scientific and reasonable emergency responses to epidemic prevention and control.https://doi.org/10.4209/aaqr.2020.07.0416COVID-19PandemicEmergency responseAir pollutionGuangdong-Hong Kong-Macao Greater Bay Area (GBA) |
| spellingShingle | Jie Li Haotian Yang Shuping Zha Nu Yu Xingang Liu Ruofei Sun Effects of COVID-19 Emergency Response Levels on Air Quality in the Guangdong-Hong Kong-Macao Greater Bay Area, China Aerosol and Air Quality Research COVID-19 Pandemic Emergency response Air pollution Guangdong-Hong Kong-Macao Greater Bay Area (GBA) |
| title | Effects of COVID-19 Emergency Response Levels on Air Quality in the Guangdong-Hong Kong-Macao Greater Bay Area, China |
| title_full | Effects of COVID-19 Emergency Response Levels on Air Quality in the Guangdong-Hong Kong-Macao Greater Bay Area, China |
| title_fullStr | Effects of COVID-19 Emergency Response Levels on Air Quality in the Guangdong-Hong Kong-Macao Greater Bay Area, China |
| title_full_unstemmed | Effects of COVID-19 Emergency Response Levels on Air Quality in the Guangdong-Hong Kong-Macao Greater Bay Area, China |
| title_short | Effects of COVID-19 Emergency Response Levels on Air Quality in the Guangdong-Hong Kong-Macao Greater Bay Area, China |
| title_sort | effects of covid 19 emergency response levels on air quality in the guangdong hong kong macao greater bay area china |
| topic | COVID-19 Pandemic Emergency response Air pollution Guangdong-Hong Kong-Macao Greater Bay Area (GBA) |
| url | https://doi.org/10.4209/aaqr.2020.07.0416 |
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