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dc.contributor.authorBaustian, Kelly J.
dc.contributor.authorCziczo, Daniel James
dc.contributor.authorWise, Matthew E.
dc.contributor.authorPratt, Kerri A.
dc.contributor.authorKulkarni, Gourihar
dc.contributor.authorHallar, A. Gannet
dc.contributor.authorTolbert, Margaret A.
dc.date.accessioned2012-12-17T20:18:58Z
dc.date.available2012-12-17T20:18:58Z
dc.date.issued2012-03
dc.date.submitted2012-01
dc.identifier.issn0148-0227
dc.identifier.issn2156–2202
dc.identifier.urihttp://hdl.handle.net/1721.1/75748
dc.description.abstractIn this study chemical compositions of background aerosol and ice nuclei were examined through laboratory investigations using Raman spectroscopy and field measurements by single-particle mass spectrometry. Aerosol sampling took place at Storm Peak Laboratory in Steamboat Springs, Colorado (elevation of 3210 m). A cascade impactor was used to collect coarse-mode aerosol particles for laboratory analysis by Raman spectroscopy; the composition, mixing state, and heterogeneous ice nucleation activity of individual particles were examined. For in situ analysis of fine-mode aerosol, ice nucleation on ambient particles was observed using a compact ice nucleation chamber. Ice crystals were separated from unactivated aerosol using a pumped counterflow virtual impactor, and ice nuclei were analyzed using particle analysis by laser mass spectrometry. For both fine and coarse modes, the ice nucleating particle fractions were enriched in minerals and depleted in sulfates and nitrates, compared to the background aerosol sampled. The vast majority of particles in both the ambient and ice active aerosol fractions contained a detectable amount of organic material. Raman spectroscopy showed that organic material is sometimes present in the form of a coating on the surface of inorganic particles. We find that some organic-containing particles serve as efficient ice nuclei while others do not. For coarse-mode aerosol, organic particles were only observed to initiate ice formation when oxygen signatures were also present in their spectra.en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (NSF-ATM0650023)en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (NSF-AGS1048536)en_US
dc.description.sponsorshipNational Aeronautics and Space Administration (NNX07ARBG)en_US
dc.description.sponsorshipPacific Northwest National Laboratory (U.S.)en_US
dc.description.sponsorshipUnited States. Dept. of Energy. (Laboratory Directed Research and Development Program)en_US
dc.language.isoen_US
dc.publisherAmerican Geophysical Union (AGU)en_US
dc.relation.isversionofhttp://dx.doi.org/10.1029/2011jd016784en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceProf. Cziczo via Chris Sherratten_US
dc.titleImportance of aerosol composition, mixing state, and morphology for heterogeneous ice nucleation: A combined field and laboratory approachen_US
dc.typeArticleen_US
dc.identifier.citationBaustian, Kelly J. et al. “Importance of Aerosol Composition, Mixing State, and Morphology for Heterogeneous Ice Nucleation: A Combined Field and Laboratory Approach.” Journal of Geophysical Research 117.D6 (2012). ©2012. American Geophysical Union.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciencesen_US
dc.contributor.approverCziczo, Daniel
dc.contributor.mitauthorCziczo, Daniel James
dc.relation.journalJournal of Geophysical Research Atmospheresen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsBaustian, Kelly J.; Cziczo, Daniel J.; Wise, Matthew E.; Pratt, Kerri A.; Kulkarni, Gourihar; Hallar, A. Gannet; Tolbert, Margaret A.en
dc.identifier.orcidhttps://orcid.org/0000-0003-1851-8740
mit.licensePUBLISHER_POLICYen_US
mit.metadata.statusComplete


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