A possible pathway for rapid growth of sulfate during haze days in China
Rapid industrialization and urbanization have caused frequent occurrence of haze in China during wintertime in recent years. The sulfate aerosol is one of the most important components of fine particles (PM<sub>2. 5</sub>) in the atmosphere, contributing significantly to the haze formati...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2017-03-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/17/3301/2017/acp-17-3301-2017.pdf |
| Summary: | Rapid industrialization and urbanization have caused
frequent occurrence of haze in China during wintertime in recent years. The
sulfate aerosol is one of the most important components of fine particles
(PM<sub>2. 5</sub>) in the atmosphere, contributing significantly to the haze
formation. However, the heterogeneous formation mechanism of sulfate remains
poorly characterized. The relationships of the observed sulfate with
PM<sub>2. 5</sub>, iron, and relative humidity in Xi'an, China have been employed
to evaluate the mechanism and to develop a parameterization of the sulfate
heterogeneous formation involving aerosol water for incorporation into
atmospheric chemical transport models. Model simulations with the proposed
parameterization can successfully reproduce the observed sulfate rapid
growth and diurnal variations in Xi'an and Beijing, China. Reasonable
representation of sulfate heterogeneous formation in chemical transport
models considerably improves the PM<sub>2. 5</sub> simulations, providing the
underlying basis for better understanding the haze formation and supporting
the design and implementation of emission control strategies. |
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| ISSN: | 1680-7316 1680-7324 |