Stratospheric Aerosol Retrieval from OSIRIS Limb Scattered Sunlight Spectra
The SASKTRAN forward model results compare favorably with both OSIRIS observations as well as with other radiative transfer model calculations while remaining computationally practical for the operational inversion of large satellite data sets.
The spectral ratio relaxation algorithm is able to retrieve aerosol number density profiles at stratospheric altitudes from limb radiance profiles assuming the height profile of the aerosol particle size distribution is known. The equivalent aerosol extinction derived from the OSIRIS measurements at visible wavelengths agrees with coincident occultation measurements from other satellite instrumentation to within 15% when a size distribution appropriate for background aerosol conditions is used. Finally, it is demonstrated that the incorporation of simultaneous infra-red observations at 1530 nm into the inversion yields a useful proxy for the aerosol size distribution parameters.
Advisor:Srinivasan, Raj; Sofko, George J.; Moewes, Alexander; Loughman, Robert; Llewellyn, Edward J.; Hussey, Glenn C.; Koustov, Alexandre V. (Sasha); Degenstein, Douglas A.
School:University of Saskatchewan
School Location:Canada - Saskatchewan
Source Type:Master's Thesis
Keywords:radiative transfer aerosol atmosphere inversion
Date of Publication:04/30/2007