Measurements of size-resolved hygroscopicity in the California coastal zone
Abstract
Aircraft – based measurements of aerosol hygroscopicity, both in the form of sizeresolved,
diameter growth factors and in the dependence of particle light scattering on
relative humidity, are presented for the marine boundary layer of the southern California coastal zone. The chemical composition of the aerosol is collated with the hygroscopicity
data, both to examine the nature of aerosol aging and as input for receptor type
modeling. The data suggest an increase in aerosol hygroscopicity with altitude, possibly
associated with oxidation of organic films. The receptor modeling suggests three
distinct aerosol types/sources for this venue: marine, biomass burning and pollution.
Model output is used in regression analyses to derive a prognostic mixing rule for the
hygroscopicity of aerosol with these three sources.
Description
Atmospheric Chemistry and Physics Discussions 8, 310531-10560
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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