An Atmospheric Particulate Sampling Procedure For Gravimetric And Elemental Analyses

Large quantities of atmospheric aerosols with compositions SO₄ ⁼, NO₃ ^? and NH₄ ⁺ have been detected in highly industrialized areas. The major portions of aerosol products are the results of energyrelated fuel combustion. Both microphysical and macrophysical processes are considered in investigating the time dependent evolution of the saturation spectra of condensation nuclei associated with both polluted and clean atmospheres during the time periods of advection fog formation. The results show that the condensation nuclei associated with a polluted atmosphere provide more favorable conditions than condensation nuclei associated with a clean atmosphere to produce dense advection fog, and that attaining a certain degree of supersaturation is not necessarily required for the formation of advection fog with condensation nuclei associated with a polluted atmosphere for monodisperse distribution.