Dissertation/Thesis Abstract

Comparison of polarized radiative transfer programs with applications to atmospheric and oceanic physics
by Cohen, Dennis, Ph.D., Stevens Institute of Technology, 2013, 143; 3568478
Abstract (Summary)

We first introduce the topic of radiative transfer and how it applies to a range of problems in physics from remote sensing of the Earth's atmospheres and oceans to investigating skin cancer. We then review the theoretical basis for radiative transfer modeling, which is further supplemented by Appendices 1-3. Afterwards a comparison is presented of two different methods for polarized radiative transfer in coupled media consisting of two adjacent slabs with different refractive indices, each slab being a stratified medium with no change in optical properties except in the direction of stratification. One of the methods is based on solving the integro-differential radiative transfer equation for the two coupled slabs using the discrete ordinate approximation. The other method is based on probabilistic and statistical concepts and simulates the propagation of polarized light using the Monte Carlo approach. The emphasis is on non-Rayleigh scattering for particles in the Mie regime. Comparisons with benchmark results available for a slab with constant refractive index show that both methods reproduce these benchmark results when the refractive index is set to be the same in the two slabs. We then we present a simple study to investigate the sensitivity of the Stokes components I, Q, and U to changes in a bimodal aerosol model for atmosphere-ocean scenes. Preliminary results show that there is significant promise in using the Q Stokes parameter in addition to I, while for this case U is deemed to be insensitive to our simple aerosol model. Lastly we conclude the work completed and suggest possible avenues for future work.

Indexing (document details)
Advisor: Stamnes, Knut
Commitee: Becker, Kurt, Martini, Rainer, Suffel, Charles, Yu, Ting
School: Stevens Institute of Technology
Department: Engineering Physics
School Location: United States -- New Jersey
Source: DAI-B 74/11(E), Dissertation Abstracts International
Subjects: Geophysics, Physics, Atmospheric sciences
Keywords: Aerosols, C-vdisort, Monte carlo, Polarized radiative transfer, Remote sensing, Stokes vector
Publication Number: 3568478
ISBN: 978-1-303-23011-0
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