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Scheidt, Stephen Paul (2010) AEOLIAN SYSTEM DYNAMICS DERIVED FROM THERMAL INFRARED DATA. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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Thermal infrared (TIR) remote-sensing and field-based observations were used to study aeolian systems, specifically sand transport pathways, dust emission sources and Saharan atmospheric dust. A method was developed for generating seamless and radiometrically accurate mosaics of thermal infrared data from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument. Using a combination of high resolution thermal emission spectroscopy results of sand samples and mosaic satellite data, surface emissivity was derived to map surface composition, which led to improvement in the understanding of sand accumulation in the Gran Desierto of northern Sonora, Mexico. These methods were also used to map sand transport pathways in the Sahara Desert, where the interaction between sand saltation and dust emission sources was explored. The characteristics and dynamics of dust sources were studied at White Sands, NM and in the Sahara Desert. At White Sands, an application was developed for studying the response of dust sources to surface soil moisture based on the relationship between soil moisture, apparent thermal inertia and the erosion potential of dust sources. The dynamics of dust sources and the interaction with sand transport pathways were also studied, focusing on the Bodele Depression of Chad and large dust sources in Mali and Mauritania. A dust detection algorithm was developed using ASTER data, and the spectral emissivity of observed atmospheric dust was related to the dust source area in the Sahara. At the Atmospheric Observatory (IZO) in Tenerife, Spain where direct measurement of the Saharan Air Layer could be made, the cycle of dust events occurring in July 2009 were examined. From the observation tower at the IZO, measurements of emitted longwave atmospheric radiance in the TIR wavelength region were made using a Forward Looking Infrared Radiometer (FLIR) handheld camera. The use of the FLIR to study atmospheric dust from the Saharan is a new application. Supporting data from AERONET and other orbital data enabled study of net radiative forcing.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Scheidt, Stephen
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairRamsey, Michaelmramsey@pitt.eduMRAMSEY
Committee MemberAbbott, Mark Bmabbott1@pitt.eduMABBOTT1
Committee MemberLancaster,
Committee MemberCapo, Rosemary Crcapo@pitt.eduRCAPO
Committee MemberRosenmeier, Michael Fmrosenme@pitt.eduMROSENME
Date: 28 January 2010
Date Type: Completion
Defense Date: 20 November 2009
Approval Date: 28 January 2010
Submission Date: 7 December 2009
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Geology and Planetary Science
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: atmospheric aerosols; dunes; linear spectral unmixing; longwave radiance; remote sensing
Other ID:, etd-12072009-215705
Date Deposited: 10 Nov 2011 20:09
Last Modified: 15 Nov 2016 13:53


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