Concentrations of size-resolved airborne particulate matter measured in Phoenix, Arizona in 1995-1996 indicate a strong linear relationship between the soil components of PM 2.5 and the intermodal PM concentration and similarly between the nonsoil components of PM 2.5 and the PM 1 concentration. Moreover, the ratio of PM 1 to intermodal PM varies considerably at all reported concentrations of PM 2.5 , and this variation appears to be systematically related to the proportion of PM 2.5 comprised of soil components.
Aerosol Science and Technology
Volume 35, 2001 - Issue 5
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