Impact of the COVID-19 Event on Trip Intensity and Air Quality in Southern China
Abstract The COVID-19 epidemic discovered and reported at the end of December 2019 and began spreading rapidly around the world. The impact of the COVID-19 event on the trip intensity, AQI (air quality index), and air pollutants, including PM2.5, PM10, SO2, CO, NO2, and O3 in Shenzhen, Guangzhou, an...
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| Format: | Article |
| Language: | English |
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Springer
2024-12-01
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| Series: | Aerosol and Air Quality Research |
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| Online Access: | https://doi.org/10.4209/aaqr.2020.07.0364 |
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| author | Shun Wan Kangping Cui Ya-Fen Wang Jhong-Lin Wu Wei-Syun Huang Kaijie Xu Jiajia Zhang |
| author_facet | Shun Wan Kangping Cui Ya-Fen Wang Jhong-Lin Wu Wei-Syun Huang Kaijie Xu Jiajia Zhang |
| author_sort | Shun Wan |
| collection | DOAJ |
| description | Abstract The COVID-19 epidemic discovered and reported at the end of December 2019 and began spreading rapidly around the world. The impact of the COVID-19 event on the trip intensity, AQI (air quality index), and air pollutants, including PM2.5, PM10, SO2, CO, NO2, and O3 in Shenzhen, Guangzhou, and Foshan (the so-called ‘three cities’) from January 12 to March 27, in 2019 and 2020, are compared and discussed. In 2020, the combined trip intensity in the three cities ranged between 0.73 and 5.54 and averaged 2.57, which was 28.4% lower than that in 2019. In terms of the combined AQIs for the three cities, from January 12 to March 26, 2020, the daily AQIs ranged between 21.0 and 121.3 and averaged 56.4, which was 16.0% lower than that in 2019. The average AQIs in order were Guangzhou (57.5) > Foshan (54.1) > Shenzhen (44.1). In 2019, the distribution proportions of the six AQI classes were 45.2%, 50.4%, 4.40%, 0%, 0%, and 0%, respectively, while those in 2020 were 62.7%, 37.3%, 0%, 0%, 0% and 0%, respectively. For the combined data for the three cities, on the top five days with the highest AQIs during the epidemic period, the average concentrations of PM2.5, PM10, SO2, CO, NO2, and O3 were 76.4 µg m–3, 113.4 µg m–3, 5.14 ppb, 0.88 ppm, 36.5 ppb and 55.5 ppb, which were 55.2%, 49.4%, 55.1%, 30.0%, 45.1% and 15.5% lower than those during the non-epidemic period (from January 12 to March 27, 2017–2019). The above results revealed that the comprehensive strict epidemic prevention and control actions reduced trip intensity and improved the air quality significantly. |
| format | Article |
| id | doaj-art-4f220f5f5cb3499ba418de6bedb2c8da |
| institution | Kabale University |
| issn | 1680-8584 2071-1409 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Springer |
| record_format | Article |
| series | Aerosol and Air Quality Research |
| spelling | doaj-art-4f220f5f5cb3499ba418de6bedb2c8da2025-02-09T12:19:24ZengSpringerAerosol and Air Quality Research1680-85842071-14092024-12-012081727174710.4209/aaqr.2020.07.0364Impact of the COVID-19 Event on Trip Intensity and Air Quality in Southern ChinaShun Wan0Kangping Cui1Ya-Fen Wang2Jhong-Lin Wu3Wei-Syun Huang4Kaijie Xu5Jiajia Zhang6School of Resources and Environmental Engineering, Hefei University of TechnologySchool of Resources and Environmental Engineering, Hefei University of TechnologyDepartment of Environmental Engineering, Chung-Yuan Christian UniversityEnvironmental Resource and Management Research Center, National Cheng Kung UniversityDepartment of Atmospheric Sciences, National Central UniversitySchool of Resources and Environmental Engineering, Hefei University of TechnologySchool of Resources and Environmental Engineering, Hefei University of TechnologyAbstract The COVID-19 epidemic discovered and reported at the end of December 2019 and began spreading rapidly around the world. The impact of the COVID-19 event on the trip intensity, AQI (air quality index), and air pollutants, including PM2.5, PM10, SO2, CO, NO2, and O3 in Shenzhen, Guangzhou, and Foshan (the so-called ‘three cities’) from January 12 to March 27, in 2019 and 2020, are compared and discussed. In 2020, the combined trip intensity in the three cities ranged between 0.73 and 5.54 and averaged 2.57, which was 28.4% lower than that in 2019. In terms of the combined AQIs for the three cities, from January 12 to March 26, 2020, the daily AQIs ranged between 21.0 and 121.3 and averaged 56.4, which was 16.0% lower than that in 2019. The average AQIs in order were Guangzhou (57.5) > Foshan (54.1) > Shenzhen (44.1). In 2019, the distribution proportions of the six AQI classes were 45.2%, 50.4%, 4.40%, 0%, 0%, and 0%, respectively, while those in 2020 were 62.7%, 37.3%, 0%, 0%, 0% and 0%, respectively. For the combined data for the three cities, on the top five days with the highest AQIs during the epidemic period, the average concentrations of PM2.5, PM10, SO2, CO, NO2, and O3 were 76.4 µg m–3, 113.4 µg m–3, 5.14 ppb, 0.88 ppm, 36.5 ppb and 55.5 ppb, which were 55.2%, 49.4%, 55.1%, 30.0%, 45.1% and 15.5% lower than those during the non-epidemic period (from January 12 to March 27, 2017–2019). The above results revealed that the comprehensive strict epidemic prevention and control actions reduced trip intensity and improved the air quality significantly.https://doi.org/10.4209/aaqr.2020.07.0364COVID-19Trip intensityAQIPM2.5PM10SO2 |
| spellingShingle | Shun Wan Kangping Cui Ya-Fen Wang Jhong-Lin Wu Wei-Syun Huang Kaijie Xu Jiajia Zhang Impact of the COVID-19 Event on Trip Intensity and Air Quality in Southern China Aerosol and Air Quality Research COVID-19 Trip intensity AQI PM2.5 PM10 SO2 |
| title | Impact of the COVID-19 Event on Trip Intensity and Air Quality in Southern China |
| title_full | Impact of the COVID-19 Event on Trip Intensity and Air Quality in Southern China |
| title_fullStr | Impact of the COVID-19 Event on Trip Intensity and Air Quality in Southern China |
| title_full_unstemmed | Impact of the COVID-19 Event on Trip Intensity and Air Quality in Southern China |
| title_short | Impact of the COVID-19 Event on Trip Intensity and Air Quality in Southern China |
| title_sort | impact of the covid 19 event on trip intensity and air quality in southern china |
| topic | COVID-19 Trip intensity AQI PM2.5 PM10 SO2 |
| url | https://doi.org/10.4209/aaqr.2020.07.0364 |
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