Lidar- and UAV-Based Vertical Observation of Spring Ozone and Particulate Matter in Nanjing, China
The rapid urbanization in China is accompanied by increasingly serious air pollution. Particulate matter and ozone are the main air pollutants, and the study of their vertical distribution and correlation plays an important role in the synergistic air pollution control. In this study, we performed L...
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MDPI AG
2022-06-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/13/3051 |
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| author | Yawei Qu Ming Zhao Tijian Wang Shu Li Mengmeng Li Min Xie Bingliang Zhuang |
| author_facet | Yawei Qu Ming Zhao Tijian Wang Shu Li Mengmeng Li Min Xie Bingliang Zhuang |
| author_sort | Yawei Qu |
| collection | DOAJ |
| description | The rapid urbanization in China is accompanied by increasingly serious air pollution. Particulate matter and ozone are the main air pollutants, and the study of their vertical distribution and correlation plays an important role in the synergistic air pollution control. In this study, we performed Lidar- and UAV-based observations in spring in Nanjing, China. The average concentrations of surface ozone and PM<sub>2.5</sub> during the observation period are 87.78 µg m<sup>−3</sup> and 43.48 µg m<sup>−3</sup>, respectively. Vertically, ozone reaches a maximum in the upper boundary layer, while the aerosol extinction coefficient decreases with height. Generally, ozone and aerosol are negatively correlated below 650 m. The correlation coefficient increases with altitude and reaches a maximum of 0.379 at 1875 m. Within the boundary layer, ozone and aerosols are negatively correlated on days with particulate pollution (PM<sub>2.5</sub> > 35 μg m<sup>−3</sup>), while on clean days they are positively correlated. Above the boundary layer, the correlation coefficient is usually positive, regardless of the presence of particulate pollution. The UAV study compensates for Lidar detections below 500 m. We found that ozone concentration is higher in the upper layers than in the near-surface layers, and that ozone depletion is faster in the near-surface layers after sunset. |
| first_indexed | 2024-03-09T12:37:29Z |
| format | Article |
| id | doaj.art-ffd4d01605144933871900109e0efd40 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T12:37:29Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-ffd4d01605144933871900109e0efd402023-11-30T22:22:45ZengMDPI AGRemote Sensing2072-42922022-06-011413305110.3390/rs14133051Lidar- and UAV-Based Vertical Observation of Spring Ozone and Particulate Matter in Nanjing, ChinaYawei Qu0Ming Zhao1Tijian Wang2Shu Li3Mengmeng Li4Min Xie5Bingliang Zhuang6College of Intelligent Science and Control Engineering, Jinling Institute of Technology, Nanjing 211169, ChinaKey Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, ChinaSchool of Atmospheric Sciences, Nanjing University, Nanjing 210023, ChinaSchool of Atmospheric Sciences, Nanjing University, Nanjing 210023, ChinaSchool of Atmospheric Sciences, Nanjing University, Nanjing 210023, ChinaSchool of Atmospheric Sciences, Nanjing University, Nanjing 210023, ChinaSchool of Atmospheric Sciences, Nanjing University, Nanjing 210023, ChinaThe rapid urbanization in China is accompanied by increasingly serious air pollution. Particulate matter and ozone are the main air pollutants, and the study of their vertical distribution and correlation plays an important role in the synergistic air pollution control. In this study, we performed Lidar- and UAV-based observations in spring in Nanjing, China. The average concentrations of surface ozone and PM<sub>2.5</sub> during the observation period are 87.78 µg m<sup>−3</sup> and 43.48 µg m<sup>−3</sup>, respectively. Vertically, ozone reaches a maximum in the upper boundary layer, while the aerosol extinction coefficient decreases with height. Generally, ozone and aerosol are negatively correlated below 650 m. The correlation coefficient increases with altitude and reaches a maximum of 0.379 at 1875 m. Within the boundary layer, ozone and aerosols are negatively correlated on days with particulate pollution (PM<sub>2.5</sub> > 35 μg m<sup>−3</sup>), while on clean days they are positively correlated. Above the boundary layer, the correlation coefficient is usually positive, regardless of the presence of particulate pollution. The UAV study compensates for Lidar detections below 500 m. We found that ozone concentration is higher in the upper layers than in the near-surface layers, and that ozone depletion is faster in the near-surface layers after sunset.https://www.mdpi.com/2072-4292/14/13/3051particulate matterozoneLidarUAV |
| spellingShingle | Yawei Qu Ming Zhao Tijian Wang Shu Li Mengmeng Li Min Xie Bingliang Zhuang Lidar- and UAV-Based Vertical Observation of Spring Ozone and Particulate Matter in Nanjing, China Remote Sensing particulate matter ozone Lidar UAV |
| title | Lidar- and UAV-Based Vertical Observation of Spring Ozone and Particulate Matter in Nanjing, China |
| title_full | Lidar- and UAV-Based Vertical Observation of Spring Ozone and Particulate Matter in Nanjing, China |
| title_fullStr | Lidar- and UAV-Based Vertical Observation of Spring Ozone and Particulate Matter in Nanjing, China |
| title_full_unstemmed | Lidar- and UAV-Based Vertical Observation of Spring Ozone and Particulate Matter in Nanjing, China |
| title_short | Lidar- and UAV-Based Vertical Observation of Spring Ozone and Particulate Matter in Nanjing, China |
| title_sort | lidar and uav based vertical observation of spring ozone and particulate matter in nanjing china |
| topic | particulate matter ozone Lidar UAV |
| url | https://www.mdpi.com/2072-4292/14/13/3051 |
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