the effect of meteorological elements on continuing heavy air pollution: a case study in the chengdu area during the 2014 spring festival
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2017
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Abstract
Meteorological conditions significantly influence air pollution. The Chengdu plain, with few external pollution sources and homogeneous meteorological conditions, is a natural lab to study the effects of meteorological elements on the diffusion and dissipation of pollutants. Large-scale and long-duration haze events occurred all over China during the Spring Festival in 2014. This study tries to detect the characteristics and the formation mechanisms of this haze event in the Chengdu area using air quality and the meteorological monitoring of this event. The results showed that, when considering the concentration changes of the primary pollutant, this haze event could be divided into three stages: Stage 1, the concentration of all pollutions increased; Stage 2, the concentration of gaseous pollutants decreased, while that of particulate matter increased; Stage 3, the concentration of all pollutants decreased. Adverse atmospheric circulation, unfavorable meteorological conditions (lower air temperature and wind speed, higher air pressure and relative humidity), a frequently occurring inversion layer (with a strong intensity and lower bottom), and the low height of the mixing layer resulted in this haze. This study suggests that not only surface meteorological factors, but also the boundary layer structure, played an important role in the vertical diffusion of the pollutants.
| Reference Key |
zeng2017atmospherethe
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|---|---|
| Authors | ;Shenglan Zeng;Yu Zhang |
| Journal | Journal of the science of food and agriculture |
| Year | 2017 |
| DOI |
10.3390/atmos8040071
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| URL | |
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