Title:
Investigation of high spectral resolution signatures and radiative forcing of tropospheric aerosol in the thermal infrared

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dc.contributor.advisor Sokolik, Irina N.
dc.contributor.author Boer, Gregory Jon en_US
dc.contributor.committeeMember Carol Paty
dc.contributor.committeeMember Josef Dufek
dc.contributor.committeeMember Curry, Judith
dc.contributor.committeeMember Olga Kalashnikova
dc.contributor.department Earth and Atmospheric Sciences en_US
dc.date.accessioned 2010-06-10T17:04:29Z
dc.date.available 2010-06-10T17:04:29Z
dc.date.issued 2010-01-15 en_US
dc.description.abstract An investigation of the high spectral resolution signatures and radiative forcing of tropospheric aerosol in the thermal infrared was conducted. To do so and to support advanced modeling of optical properties, a high spectral resolution library of atmospheric aerosol optical constants was developed. This library includes new optical constants of sulfate-nitrate-ammonium aqueous solutions and the collection of a broad range of existing optical constants for aerosol components, particularly mineral optical constants. The mineral optical constants were used to model and study infrared dust optical signatures as a function of composition, size, shape and mixing state. In particular, spherical and non-spherical optical models of dust particles were examined and compared to high spectral resolution laboratory extinction measurements. Then the performance of some of the most common effective medium approximations for internal mixtures was examined by modeling the optical constants of the newly determined sulfate-nitrate-ammonium mixtures. The optical signature analysis was applied to airborne and satellite high spectral resolution thermal infrared radiance data impacted by Saharan dust events. A new technique to retrieve dust microphysical properties from the dust spectral signature was developed and compared to a standard technique. The microphysics retrieved from this new technique and from a standard technique were then used to investigate the effects of dust on radiative forcing and cooling rates in the thermal IR. en_US
dc.description.degree Ph.D. en_US
dc.identifier.uri http://hdl.handle.net/1853/34001
dc.publisher Georgia Institute of Technology en_US
dc.subject Aerosol radiative forcing en_US
dc.subject Aerosol refractive index en_US
dc.subject Thermal infrared en_US
dc.subject Radiative transfer en_US
dc.subject Dust aerosol en_US
dc.subject Aerosol remote sensing en_US
dc.subject.lcsh Atmospheric aerosols
dc.subject.lcsh Heat Radiation and absorption
dc.subject.lcsh Infrared radiation
dc.subject.lcsh Optical constants
dc.subject.lcsh Dust Microstructure
dc.title Investigation of high spectral resolution signatures and radiative forcing of tropospheric aerosol in the thermal infrared en_US
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.advisor Sokolik, Irina N.
local.contributor.corporatename School of Earth and Atmospheric Sciences
local.contributor.corporatename College of Sciences
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relation.isOrgUnitOfPublication 85042be6-2d68-4e07-b384-e1f908fae48a
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