1981 Volume 59 Issue 1 Pages 33-39
Observations of continental aerosols were carried out in Canada in winter season. The horizontal distribution of aerosol concentrations in an area for approximately a 100km radius showed the characteristic features of dispersion over land. It was seen that the horizontal distributions of aerosol concentrations in a city were influenced by the emission rate and meteorological conditions.
The ratios N7.0/N1.5 representing vertical distributions of aerosol concentrations were greater than 1.0, that is to say, the aerosol concentrations at 1.5m were lower than those at 7.0m. The ratio N7.0/N1.5 became larger, as the atmospheric stability became more stable. It is considered that the characteristic features result from inactive diffusion with the ground sink under the stable condition.