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Analysis of a severe prolonged regional haze episode in the Yangtze River Delta, China
Abstract A severe prolonged regional haze episode occurred over the Yangtze River Delta (YRD) from 2 to 14 December 2013. In this paper, we have discussed the probable cause of haze episode and aerosol characteristics. Analysis of visibility and meteorological parameters suggest that the meteorological conditions play a very important role in the accumulation of aerosol particles that cause haze. The height of the planetary boundary layer (PBL) is considered as one of the key factors together with other factors in the haze formation. The Principal Component Analysis (PCA) clearly shows accumulation process of air pollutants from vehicular, industrial and anthropogenic sources are major contributors for the haze formation. The aerosol optical properties (aerosol optical depth – AOD, Ångström exponent – α and Ultra Violet Aerosol Index – UVAI) are analyzed to study the temporal and spatial variations of aerosol loadings. The results show concentrations of fine mode particles during the haze episode, the dust could have been also entered in the region from the northwestern China. Analysis of vertical aerosol profiles indicate that dust aerosols concentrated in the lower part of the haze layers.
Highlights A severe prolonged regional haze episode occurred in YRD region, China. Principal influential factors of visibility were different in haze episode. Accumulation process of air pollutants was discussed based on PCA method. Characteristics of aerosol properties and loading were analyzed.
Analysis of a severe prolonged regional haze episode in the Yangtze River Delta, China
Abstract A severe prolonged regional haze episode occurred over the Yangtze River Delta (YRD) from 2 to 14 December 2013. In this paper, we have discussed the probable cause of haze episode and aerosol characteristics. Analysis of visibility and meteorological parameters suggest that the meteorological conditions play a very important role in the accumulation of aerosol particles that cause haze. The height of the planetary boundary layer (PBL) is considered as one of the key factors together with other factors in the haze formation. The Principal Component Analysis (PCA) clearly shows accumulation process of air pollutants from vehicular, industrial and anthropogenic sources are major contributors for the haze formation. The aerosol optical properties (aerosol optical depth – AOD, Ångström exponent – α and Ultra Violet Aerosol Index – UVAI) are analyzed to study the temporal and spatial variations of aerosol loadings. The results show concentrations of fine mode particles during the haze episode, the dust could have been also entered in the region from the northwestern China. Analysis of vertical aerosol profiles indicate that dust aerosols concentrated in the lower part of the haze layers.
Highlights A severe prolonged regional haze episode occurred in YRD region, China. Principal influential factors of visibility were different in haze episode. Accumulation process of air pollutants was discussed based on PCA method. Characteristics of aerosol properties and loading were analyzed.
Analysis of a severe prolonged regional haze episode in the Yangtze River Delta, China
Wang, Mengya (author) / Cao, Chunxiang (author) / Li, Guoshuai (author) / Singh, Ramesh P. (author)
Atmospheric Environment ; 102 ; 112-121
2014-11-15
10 pages
Article (Journal)
Electronic Resource
English