Articles | Volume 20, issue 11
Atmos. Chem. Phys., 20, 6479–6493, 2020
https://doi.org/10.5194/acp-20-6479-2020
Atmos. Chem. Phys., 20, 6479–6493, 2020
https://doi.org/10.5194/acp-20-6479-2020

Research article 05 Jun 2020

Research article | 05 Jun 2020

The mechanisms and seasonal differences of the impact of aerosols on daytime surface urban heat island effect

Wenchao Han et al.

Data sets

EARTHDATA NASA https://search.earthdata.nasa.gov/

Hourly PM2.5 data Ministry of Ecology and Environment of China http://106.37.208.233:20035

NCEP FNL Operational Model Global Tropospheric Analyses, continuing from July 1999 NCEP https://doi.org/10.5065/D6M043C6

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Short summary
Observational data and model simulation were used to analyze the daytime urban heat island intensity (UHII) under polluted and clean conditions in China. We found that aerosols reduce the UHII in summer but increase the UHII in winter. Two mechanisms, the aerosol radiative effect (ARE) and the aerosol dynamic effect (ADE), behave differently in summer and winter. In summer, the UHII is mainly affected by the ARE, and the ADE is weak, and the opposite is the case in winter.
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