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Direct temperature and salinity acoustic full waveform inversion
Author(s) -
Bornstein G.,
Biescas B.,
Sallarès V.,
Mojica J. F.
Publication year - 2013
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/grl.50844
Subject(s) - inversion (geology) , waveform , geology , temperature salinity diagrams , salinity , speed of sound , electrical impedance , geophysics , seismology , acoustics , physics , voltage , oceanography , quantum mechanics , tectonics
Recent work has shown that Full Waveform Inversion could be suitable to extract physical properties such as sound speed ( c ), density ( ρ ), temperature ( T ), and salinity ( S ) from the weak impedance contrasts associated with the ocean's thermohaline fine structure.The seismic inversion approaches proposed so far are based on the iterative inversion of c from multichannel seismic data, while the rest of parameters ( T , S , and ρ ) are determined in a second step using two equations of state and a local T ‐ S empirical relationship. In this work, we present an alternative to this approach. Using 1‐D synthetic seismic data, we demonstrate that the direct full waveform inversion of T and S using adjoint methods is feasible without the use of any local T ‐ S relationship and that the models of physical properties obtained with this approach are far more accurate than those inferred from c .