Size Distributions of Natural Aerosols Below 0.1 Micron

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Abstract
This paper presents the results of measurements of size distributions of particulate matter in the atmosphere. The general shape of the distributions is discussed, particularly the appearance of maxima corresponding to particles with radii about 6×10−6 cm and the sizeable fraction of the total particle population in the region r≤10−6 cm. Size distributions obtained from the same air mass before and after fog formation show apparent removal of smaller particles (r≤10−6 cm) which is consistent with Smoluchowski's coagulation law. Several representations of size distributions are presented in order to compare the results obtained with those of other researchers. Abstract This paper presents the results of measurements of size distributions of particulate matter in the atmosphere. The general shape of the distributions is discussed, particularly the appearance of maxima corresponding to particles with radii about 6×10−6 cm and the sizeable fraction of the total particle population in the region r≤10−6 cm. Size distributions obtained from the same air mass before and after fog formation show apparent removal of smaller particles (r≤10−6 cm) which is consistent with Smoluchowski's coagulation law. Several representations of size distributions are presented in order to compare the results obtained with those of other researchers.

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