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- W4327606490 endingPage "101492" @default.
- W4327606490 startingPage "101492" @default.
- W4327606490 abstract "Fine particles (PM2.5) scatter and absorb solar radiation affecting the atmospheric temperature structure, and the effects vary with different concentrations and compositions. This study investigated the effect of PM2.5 on the urban temperature structure of Nanjing through concentration- and species-sensitive experiments using a box model. The results show that the optical parameters, atmospheric heating rate, radiative forcing, and temperature are affected by the PM2.5 concentration, PM2.5 composition, and relative humidity. Under 80% relative humidity, the asymmetry and single scattering albedo (SSA) were 0.7 and 0.88, while under 20% relative humidity, they were 0.6 and 0.77, respectively. PM2.5 increased the atmospheric heating rate by 1–18 K/day; while the surface temperature decreased with the presence of PM2.5. Furthermore, the heterogeneous concentration and composition distributions of PM2.5 led to changes in urban heat island (UHI) intensity. The UHI intensity could be reduced by 1–3 K by PM2.5, and the reduction increased with the increase in PM2.5 concentration and absorbing compositions. The existence of absorbing compositions and high concentrations of PM2.5 may work together to mask the UHI effect and other problems of urban development from 2000s till the present." @default.
- W4327606490 created "2023-03-17" @default.
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- W4327606490 date "2023-05-01" @default.
- W4327606490 modified "2023-10-01" @default.
- W4327606490 title "An idealized sensitivity study of fine particles' impact on the urban vertical temperature structure" @default.
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- W4327606490 doi "https://doi.org/10.1016/j.uclim.2023.101492" @default.
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