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16 - Adjoint Methods and Sensitivity Analysis

from Part IV - Inversion for Earth Structure

Published online by Cambridge University Press:  16 November 2020

Brian L. N. Kennett
Affiliation:
Australian National University, Canberra
Andreas Fichtner
Affiliation:
ETH Zurich
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Summary

Descent methods of optimisation depend on calculating the derivatives of the composite function with respect to the large number of model parameters. Adjoint techniques allow the computation of derivatives in such complex models, with much less calculation than direct methods, and so enable practical non-linear inversion. Adjoint methods also allow effective computation of sensitivity kernels associated with the variation of critical parameters for both structure and sources. Sensitivity kernels can provide insight into the nature of Earth structure and the potential resolution of seismic tomography.

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Chapter
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Exploiting Seismic Waveforms
Correlation, Heterogeneity and Inversion
, pp. 378 - 397
Publisher: Cambridge University Press
Print publication year: 2020

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