Articles | Volume 18, issue 23
Atmos. Chem. Phys., 18, 17717–17733, 2018
https://doi.org/10.5194/acp-18-17717-2018
Atmos. Chem. Phys., 18, 17717–17733, 2018
https://doi.org/10.5194/acp-18-17717-2018

Research article 13 Dec 2018

Research article | 13 Dec 2018

Contributions to the explosive growth of PM2.5 mass due to aerosol–radiation feedback and decrease in turbulent diffusion during a red alert heavy haze in Beijing–Tianjin–Hebei, China

Hong Wang et al.

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The explosive growth (EG) of PM2.5 resulted in a PM2.5 maximum, which was generally underestimated by atmospheric chemical models due to the deficient description of the local turbulence intermittent. The aerosol–radiation feedback (AF) and decrease in turbulence diffusion (DTD) may reduce the underestimation of PM2.5 EG by 20–25% and 14–20%, respectively. The modeled EG stage PM2.5 error was decreased from −40 to −51% to −11 to 2% by the combined effects of AF and DTD in Jing–Jin–Ji.
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