Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences
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Beijing Da Xue Xue Bao · Jun 2014
[Concentrations of fine particulate matters and ultrafine particles and influenced factors during winter in an area of Beijing].
To study the concentrations of fine particulate matters and ultrafine particles and influenced factors during winter in an area of Beijing. ⋯ The level of the particulate matters in this area was high. Heavy traffic, setting off of fireworks/firecrackers and meteorological factors may be some of the main factors affecting the concentrations of the particulate matters in this area. Among those factors, the effect of setting off of fireworks/firecrackers didn't last long and the effect of the meteorological factors had a hysteresis effect.