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dc.contributor.authorSchuldt, Kimberly Jean
dc.date.accessioned2014-10-28T04:30:21Z
dc.date.available2014-10-28T04:30:21Z
dc.date.issued2014-05
dc.identifier.otherschuldt_kimberly_j_201405_ms
dc.identifier.urihttp://purl.galileo.usg.edu/uga_etd/schuldt_kimberly_j_201405_ms
dc.identifier.urihttp://hdl.handle.net/10724/30621
dc.description.abstractThe interaction of aerosol particles and solar radiation plays an important role in the global radiative balance. Discussed in this work is the use of cavity ring down spectroscopy for the measurement of complex refractive indices for homogeneous aerosols and aerosol mixtures. Application of a novel calibration method improved the uncertainty of extinction cross section measurements collected from 10.6% to 2%. This technique retrieved complex refractive index measurements in close agreement with the values predicted by the volume-fraction mixing rule for an absorbing binary mixture composed of 2-(2-benzotriazol-2-yl)-6-dodecyl-4-methylphenol (BDMP), a strong UV absorber, and squalane. These measurements demonstrate high sensitivity and the ability to measure atmospherically relevant absorption. Measurements of aerosol external mixtures demonstrated the ability to measure the contribution of multiple-charged particles to measured extinction cross sections at small particle diameters. An initial investigation into the importance of phase in aerosol optical properties is also described.
dc.languageeng
dc.publisheruga
dc.rightspublic
dc.subjectcavity ring down spectroscopy
dc.subjectcomplex refractive index
dc.subjectaerosol
dc.subjectoptical properties
dc.subjectUV
dc.subjectvolume fraction mixing rule
dc.subjectinternal mixture
dc.subjectmultiple-charged particles
dc.subjectexternal mixture
dc.titleApplication of a calibrated aerosol cavity ring down spectrometer at 355 nm for the measurement of scattering and absorbing homogeneous aerosols and aerosol mixtures
dc.typeThesis
dc.description.degreeMS
dc.description.departmentChemistry
dc.description.majorChemistry
dc.description.advisorGeoffrey D. Smith
dc.description.committeeGeoffrey D. Smith
dc.description.committeeJason Locklin
dc.description.committeeGary Douberly


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