Journal article
Circulation-regulated impacts of aerosol pollution on urban heat island in Beijing
Atmospheric chemistry and physics, Vol.22(20), pp.13341-13353
10/18/2022
DOI: 10.5194/acp-22-13341-2022
Abstract
Unprecedented urbanization in China has led to serious urban heat island (UHI) issues, exerting intense heat stress on urban residents. Based on the observed temperature and PM2.5 concentrations in Beijing over 2016-2020, we find diverse influences of aerosol pollution on urban heat island intensity (UHII) under different circulations. When northerly winds are prevalent in urban Beijing, UHII tends to be much higher in both daytime and nighttime and it is less affected by aerosol concentrations. However, when southerly and westerly winds are dominant in rural Beijing, UHII is significantly reduced by aerosol pollution. Using coupled aerosol-radiation weather simulations, we demonstrate the underlying physical mechanism which is associated with local circulation and resulting spatial distribution of aerosols. Our results also highlight the role of black carbon in aggravating UHI, especially during nighttime. It could thus be targeted for cooperative management of heat islands and aerosol pollution.
Details
- Title: Subtitle
- Circulation-regulated impacts of aerosol pollution on urban heat island in Beijing
- Creators
- Fan Wang - Hong Kong Baptist Univ, Dept Geog, State Key Lab Environm & Biol Anal, Hong Kong 999077, Peoples R ChinaGregory R. Carmichael - University of IowaJing Wang - Tianjin Institute of Metrological Supervision TestingBin Chen - Univ Hong Kong, Fac Architecture, Div Landscape Architecture, Hong Kong 999077, Peoples R ChinaBo Huang - Chinese Univ Hong Kong, Inst Space & Earth Informat Sci, Hong Kong 999077, Peoples R ChinaYuguo Li - Univ Hong Kong, Dept Mech Engn, Pokfulam, Hong Kong 999077, Peoples R ChinaYuanjian Yang - Nanjing Univ Informat Sci & Technol, Sch Atmospher Phys, China Meteorol Adm, Key Lab Aerosol Cloud Precipitat,Collaborat Innov, Nanjing 210044, Peoples R ChinaMeng Gao - Hong Kong Baptist University
- Resource Type
- Journal article
- Publication Details
- Atmospheric chemistry and physics, Vol.22(20), pp.13341-13353
- DOI
- 10.5194/acp-22-13341-2022
- ISSN
- 1680-7316
- eISSN
- 1680-7324
- Publisher
- Copernicus Gesellschaft Mbh
- Number of pages
- 13
- Grant note
- 2019A1515011633 / Natural Science Foundation of Guangdong Province; National Natural Science Foundation of Guangdong Province 42005084 / National Natural Science Foundation of China; National Natural Science Foundation of China (NSFC) HKBU22201820; HKBU12202021 / Research Grants Council of the Hong Kong Special Administrative Region, China; Hong Kong Research Grants Council
- Language
- English
- Date published
- 10/18/2022
- Academic Unit
- Civil and Environmental Engineering; Nursing; Chemical and Biochemical Engineering
- Record Identifier
- 9984307659502771
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