title: [Light scattering extinction properties of atmospheric particle and pollution characteristics in hazy weather in Hangzhou].
abstract: In order to evaluate the influence of particle scattering on visibility, light scattering coefficient, particle concentrations and meteorological factor were simultaneously monitored from July 2011 to June 2012 in Hangzhou. Daily scattering coefficients ranged from 108.4 to 1 098.1 Mm(-1), with an annual average concentration of 428.6 Mm(-1) ± 200.2 Mm(-1). Seasonal variation of scattering coefficients was significant, with the highest concentrations observed in autumn and winter and the lowest in summer. It was found there were two peaks for the average diurnal variations of the scattering coefficient, which could be observed at 08:00 and 21:00. The scattering efficiencies of PM2.5 and PM10 were 7.6 m2 x g(-1) and 4.4 m2 x g(-1), respectively. The particle scattering was about 90.2 percent of the total light extinction. The scattering coefficients were 684.4 Mm(-1) ± 218.1 Mm(-1) and 1 095.4 Mm(-1) ± 397.7 Mm(-1) in hazy and heavy hazy days, respectively, which were 2.6 and 4.2 times as high as in non-hazy weather, indicating that particle scattering is the main factor for visibility degradation and the occurrence of hazy weather in Hangzhou.
authors.forename: Chang
authors.initials: C
authors.lastname: Xu
authors.forename: Hui
authors.initials: H
authors.lastname: Ye
authors.forename: Jian-Dong
authors.initials: JD
authors.lastname: Shen
authors.forename: Hong-Liang
authors.initials: HL
authors.lastname: Sun
authors.forename: Sheng-Mao
authors.initials: SM
authors.lastname: Hong
authors.forename: Li
authors.initials: L
authors.lastname: Jiao
authors.forename: Kan
authors.initials: K
authors.lastname: Huang
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D002681:China; D004784:Environmental Monitoring; D008027:Light; D052638:Particulate Matter / Q000032:analysis*; D012621:Seasons; D014887:Weather
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter