How Does PM2.5 Impact the Urban Vertical Temperature Structure? A Case Study in Nanjing
Abstract PM2.5 impacts the atmospheric temperature structure through scattering or absorbing solar radiation, whose concentration and composition can affect the impact. This study calculated the effect of PM2.5 on the temperature structures in the urban centre and the suburbs of Nanjing, as well as...
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| Format: | Article |
| Language: | English |
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Springer
2024-01-01
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| Series: | Aerosol and Air Quality Research |
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| Online Access: | https://doi.org/10.4209/aaqr.230214 |
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| author | Hao Wu Yang Cao Tijian Wang Jiawei You Tingting Yang Yawei Qu Shuqi Yan Huadong Yang Xiyu Mu Libo Gao Congwu Huang |
| author_facet | Hao Wu Yang Cao Tijian Wang Jiawei You Tingting Yang Yawei Qu Shuqi Yan Huadong Yang Xiyu Mu Libo Gao Congwu Huang |
| author_sort | Hao Wu |
| collection | DOAJ |
| description | Abstract PM2.5 impacts the atmospheric temperature structure through scattering or absorbing solar radiation, whose concentration and composition can affect the impact. This study calculated the effect of PM2.5 on the temperature structures in the urban centre and the suburbs of Nanjing, as well as their differences. The results show that the optical parameters, atmospheric heating rate, radiative forcing, and temperature are all impacted by the concentration and composition of PM2.5. The uneven distribution of PM2.5 influences the differences in those factors between the urban centre and suburbs. In spring, summer, autumn, and winter, surface temperatures in the urban centre were approximately 283 K, 285 K, 305 K, and 277 K, while those in the suburbs were approximately 282 K, 283 K, 304 K, and 274 K. The urban heat island intensity has been reduced by 0.1–0.4 K due to the presence of PM2.5 in Nanjing. Due to the black carbon component’s warming effect on the top of the boundary layer, the impact of PM2.5 on the urban heat island intensity profile drops quickly at the 0.75–1.25 km. PM2.5 may mask the “warm city” problem and have a more complex impact on the urban climate. |
| format | Article |
| id | doaj-art-cde3a55b8b74485ebb0c47d5a1bb986f |
| institution | Kabale University |
| issn | 1680-8584 2071-1409 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Springer |
| record_format | Article |
| series | Aerosol and Air Quality Research |
| spelling | doaj-art-cde3a55b8b74485ebb0c47d5a1bb986f2025-02-09T12:23:33ZengSpringerAerosol and Air Quality Research1680-85842071-14092024-01-0124411710.4209/aaqr.230214How Does PM2.5 Impact the Urban Vertical Temperature Structure? A Case Study in NanjingHao Wu0Yang Cao1Tijian Wang2Jiawei You3Tingting Yang4Yawei Qu5Shuqi Yan6Huadong Yang7Xiyu Mu8Libo Gao9Congwu Huang10Key Laboratory of Transportation Meteorology of China Meteorological Administration, Nanjing Joint Institute for Atmospheric SciencesCollege of Construction Engineering, Jiangsu Open UniversitySchool of Atmospheric Sciences, Nanjing UniversityProductivity Centre of Jiangsu ProvinceKey Laboratory of Transportation Meteorology of China Meteorological Administration, Nanjing Joint Institute for Atmospheric SciencesCollege of Intelligent and Control Engineering, Jinling Institute of TechnologyKey Laboratory of Transportation Meteorology of China Meteorological Administration, Nanjing Joint Institute for Atmospheric SciencesKey Laboratory of Transportation Meteorology of China Meteorological Administration, Nanjing Joint Institute for Atmospheric SciencesKey Laboratory of Transportation Meteorology of China Meteorological Administration, Nanjing Joint Institute for Atmospheric SciencesJiangsu Meteorological ObservatoryFaculty of Resources and Environmental Science, Hubei UniversityAbstract PM2.5 impacts the atmospheric temperature structure through scattering or absorbing solar radiation, whose concentration and composition can affect the impact. This study calculated the effect of PM2.5 on the temperature structures in the urban centre and the suburbs of Nanjing, as well as their differences. The results show that the optical parameters, atmospheric heating rate, radiative forcing, and temperature are all impacted by the concentration and composition of PM2.5. The uneven distribution of PM2.5 influences the differences in those factors between the urban centre and suburbs. In spring, summer, autumn, and winter, surface temperatures in the urban centre were approximately 283 K, 285 K, 305 K, and 277 K, while those in the suburbs were approximately 282 K, 283 K, 304 K, and 274 K. The urban heat island intensity has been reduced by 0.1–0.4 K due to the presence of PM2.5 in Nanjing. Due to the black carbon component’s warming effect on the top of the boundary layer, the impact of PM2.5 on the urban heat island intensity profile drops quickly at the 0.75–1.25 km. PM2.5 may mask the “warm city” problem and have a more complex impact on the urban climate.https://doi.org/10.4209/aaqr.230214PM2.5Urban heat islandBox modelRadiative forcingFine particulate matter |
| spellingShingle | Hao Wu Yang Cao Tijian Wang Jiawei You Tingting Yang Yawei Qu Shuqi Yan Huadong Yang Xiyu Mu Libo Gao Congwu Huang How Does PM2.5 Impact the Urban Vertical Temperature Structure? A Case Study in Nanjing Aerosol and Air Quality Research PM2.5 Urban heat island Box model Radiative forcing Fine particulate matter |
| title | How Does PM2.5 Impact the Urban Vertical Temperature Structure? A Case Study in Nanjing |
| title_full | How Does PM2.5 Impact the Urban Vertical Temperature Structure? A Case Study in Nanjing |
| title_fullStr | How Does PM2.5 Impact the Urban Vertical Temperature Structure? A Case Study in Nanjing |
| title_full_unstemmed | How Does PM2.5 Impact the Urban Vertical Temperature Structure? A Case Study in Nanjing |
| title_short | How Does PM2.5 Impact the Urban Vertical Temperature Structure? A Case Study in Nanjing |
| title_sort | how does pm2 5 impact the urban vertical temperature structure a case study in nanjing |
| topic | PM2.5 Urban heat island Box model Radiative forcing Fine particulate matter |
| url | https://doi.org/10.4209/aaqr.230214 |
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