Abstract
Particle number and mass concentrations were measured in Beijing during the winter and summer periods in 2003, together with some other parameters including black carbon (BC) and meteorological conditions. Particle mass concentrations exhibited low seasonality, and the ratio of PM2.5/PM10 in winter was higher than that in summer. Particle number size distribution (PSD) was characterized by four modes and exhibited low seasonality. BC was well correlated with the number and mass concentrations of accumulation and coarse particles, indicating these size particles are related to anthropogenic activities. Particle mass and number concentrations (except ultra-fine and nucleation particles) followed well the trends of BC concentration for the majority of the day, indicating that most particles were associated with primary emissions. The diurnal number distributions of accumulation and coarse mode particles were characterized by two peaks.
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Jianhua, Y., Guinot, B., Tong, Y. et al. Seasonal variations of number size distributions and mass concentrations of atmospheric particles in Beijing. Adv. Atmos. Sci. 22, 401–407 (2005). https://doi.org/10.1007/BF02918753
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DOI: https://doi.org/10.1007/BF02918753