Geoacoustic inversion by mode amplitude perturbation
Poole, Travis L.
Frisk, George V.
Lynch, James F.
Pierce, Allan D.
MetadataShow full item record
This paper introduces a perturbative inversion algorithm for determining sea floor acoustic properties, which uses modal amplitudes as input data. Perturbative inverse methods have been used in the past to estimate bottom acoustic properties in sediments, but up to this point these methods have used only the modal eigenvalues as input data. As with previous perturbative inversion methods, the one developed in this paper solves the nonlinear inverse problem using a series of approximate, linear steps. Examples of the method applied to synthetic and experimental data are provided to demonstrate the method's feasibility. Finally, it is shown that modal eigenvalue and amplitude perturbation can be combined into a single inversion algorithm that uses all of the potentially available modal data.
Author Posting. © Acoustical Society of America, 2008. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 123 (2008): 667-678, doi:10.1121/1.2821975.
Showing items related by title, author, creator and subject.
Recent wind-driven variability in Atlantic water mass distribution and meridional overturning circulation Evans, Dafydd Gwyn; Toole, John M.; Forget, Gael; Zika, Jan D.; Naveira Garabato, Alberto C.; Nurser, A. J. George; Yu, Lisan (American Meteorological Society, 2017-03-17)Interannual variability in the volumetric water mass distribution within the North Atlantic Subtropical Gyre is described in relation to variability in the Atlantic meridional overturning circulation. The relative roles ...
Conductivity structure of the lithosphere-asthenosphere boundary beneath the eastern North American margin Attias, Eric; Evans, Rob L.; Naif, Samer; Elsenbeck, James R.; Key, Kerry (John Wiley & Sons, 2017-02-25)Tectonic plate motion and mantle dynamics processes are heavily influenced by the characteristics of the lithosphere-asthenosphere boundary (LAB), yet this boundary remains enigmatic regarding its properties and geometry. ...
Marchal, Olivier; Francois, Roger; Scholten, Jan C. (2007-01-02)An inverse finite-difference model of the abyssal circulation in the North Atlantic Ocean is developed in order to evaluate the dynamical information contained in measurements of thorium-230 (230Th). The model has a very ...