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Anelastic sensitivity kernels with parsimonious storage for adjoint tomography and full waveform inversion

Author(s): Komatitsch, Dimitri; Xie, Zhinan; Bozdağ, Ebru; de Andrade, Elliott S; Peter, Daniel; et al

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Abstract: We introduce a technique to compute exact anelastic sensitivity kernels in the time domain using parsimonious disk storage. The method is based on a reordering of the time loop of time-domain forward/adjoint wave propagation solvers combined with the use of a memory buffer. It avoids instabilities that occur when time-reversing dissipative wave propagation simulations. The total number of required time steps is unchanged compared to usual acoustic or elastic approaches. The cost is reduced by a factor of 4/3 compared to the case in which anelasticity is partially accounted for by accommodating the effects of physical dispersion. We validate our technique by performing a test in which we compare the Kα sensitivity kernel to the exact kernel obtained by saving the entire forward calculation. This benchmark confirms that our approach is also exact. We illustrate the importance of including full attenuation in the calculation of sensitivity kernels by showing significant differences with physical-dispersion-only kernels.
Publication Date: 13-Jun-2016
Citation: Komatitsch, Dimitri, Zhinan Xie, Ebru Bozdağ, Elliott Sales de Andrade, Daniel Peter, Qinya Liu, and Jeroen Tromp. "Anelastic sensitivity kernels with parsimonious storage for adjoint tomography and full waveform inversion." Geophysical Journal International 206, no. 3 (2016): 1467-1478. doi:10.1093/gji/ggw224.
DOI: doi:10.1093/gji/ggw224
ISSN: 0956-540X
EISSN: 1365-246X
Pages: 1467 - 1478
Type of Material: Journal Article
Journal/Proceeding Title: Geophysical Journal International
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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