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Título

Direct temperature and salinity acoustic full waveform inversion

AutorBornstein, G. ; Biescas, Berta ; Sallarès, Valentí ; Mojica, J.F.
Fecha de publicación12-jun-2014
CitaciónBook of Abstracts submitted to the IV Congress of Marine Sciences. Las Palmas de Gran Canaria, June 11th to 13th: 414 (2014)
ResumenAcoustic reflectivity provides insight into the fine structure of the ocean by using the multichannel seismic reflection method. Retrieving physical properties of the ocean from acoustic reflectivity has been one of the main topics of this subject. Until now, the main inversion strategy has been to invert sound speed from reflectivity. Afterwards, a combination of equations of state and a local T-S relationship is required to derive subsequently the rest of parameters (temperature, salinity and density). We have developed an alternative approach based on the direct inversion of temperature and salinity from the reflected waveform. We have implemented a time domain, multi scale, acoustic FWI algorithm with a gradient-based optimization scheme that solves for T and S. The sensitivity kernels of those parameters are calculated via the adjoint method, and we use the iterative non-linear conjugate gradients (NL-CG) search method to minimize a misfit function. We present in this work the T and S inversions obtained from acoustic synthetic data propagated through the thermohaline finestructure of the Gulf of Cadiz, North Atlantic Ocean
DescripciónIV Congress of Marine Sciences, 11-13 June 2014, Las Palmas de Gran Canaria.-- 1 page
Versión del editorhttp://ivcongresoccm.ulpgc.es/siquimar14/programa
URIhttp://hdl.handle.net/10261/116764
Identificadoresisbn: 978-84-697-0471-4
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