Chemical properties of insoluble precipitation residue particles

TitleChemical properties of insoluble precipitation residue particles
Publication TypeJournal Article
Year of Publication2014
AuthorsCreamean JM, Lee C., Hill T.C, Ault AP, DeMott PJ, White AB, Ralph FM, Prather KA
JournalJournal of Aerosol Science
Date Published2014/10
Type of ArticleArticle
ISBN Number0021-8502
Accession NumberWOS:000342541100002
Keywordsaerosol-particles; asian dust; ATOFMS; biological ice nucleators; CalWater I; cloud condensation nuclei; desert dust; ice nuclei; individual particles; Insoluble residues; mineral dust; mixing state; particles; Precipitation chemistry; sea-salt; size distribution; Soluble ions

Precipitation chemistry can provide unique insights into the composition of aerosol particles involved in precipitation processes. Until recently, precipitation chemistry studies focused predominantly on soluble components. Analyzing the single particle insoluble components in addition to soluble ions in precipitation can provide detailed information on the individual particles originally in the cloud or removed by precipitation as well as the source of the aerosols. Herein, we present an in-depth analysis of resuspended residues from precipitation samples collected at a remote site in the Sierra Nevada Mountains in California during the 2009-2011 winter seasons. In addition, we present results from laboratory control experiments of dust, leaf litter, smoke, and sea salt samples that were conducted to better understand how insoluble and soluble residues are distributed during the atomization process and aid in the classification of the residue compositions in the precipitation samples. Further, immersion freezing ice nuclei (IN) measurements of insoluble residues from precipitation water enabled the determination of residue types that likely seeded clouds. Long-range transported dust mixed with biological material tended to be more IN active, while purely biological residues contained a variety of high and low temperature IN. Overall, results from this study can be used as a benchmark for classification of insoluble precipitation residues in future studies. Knowledge of the precipitation chemistry of insoluble residues coupled with meteorological and cloud microphysical measurements will ultimately improve our understanding of the link between aerosols, clouds, and precipitation. (C) 2014 Published by Elsevier Ltd.

Short TitleJ. Aerosol. Sci.
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