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Related Experiment Video

Updated: Jun 21, 2026

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Analyzing lateral seabed variability with Bayesian inference of seabed reflection data.

Jan Dettmer1, Charles W Holland, Stan E Dosso

  • 1School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia, Canada. jand@uvic.ca

The Journal of the Acoustical Society of America
|July 17, 2009
PubMed
Summary

This study uses Bayesian inversion to analyze seabed reflection data, revealing spatial sediment variability by rigorously estimating uncertainties. This method helps distinguish true geological changes from inversion limitations.

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Area of Science:

  • Geophysics
  • Oceanography
  • Acoustic remote sensing

Background:

  • Understanding seabed geoacoustic properties is crucial for marine surveys and acoustic modeling.
  • Lateral variability in seabed sediments can significantly impact acoustic wave propagation.
  • Accurate uncertainty quantification is essential for reliable geophysical inversions.

Purpose of the Study:

  • To investigate the lateral variability of seabed geoacoustic properties using Bayesian inversion.
  • To rigorously estimate uncertainties in geoacoustic model parameters.
  • To differentiate true seabed spatial variability from inversion-related uncertainties.

Main Methods:

  • Bayesian inversion of seabed reflection-coefficient data.
  • Bayesian model selection using the Bayesian Information Criterion.
  • Quantification of data error statistics using full covariance matrices.
  • Markov-chain Monte Carlo (MCMC) approach with a Metropolis-Hastings algorithm.
  • Bhattacharyya coefficient for comparing probability distributions.

Main Results:

  • Successfully resolved lateral variability in seabed sediments across four sites on the Malta Plateau.
  • Demonstrated rigorous uncertainty estimation to distinguish geological variability from inversion uncertainties.
  • Validated inversion results against core samples and chirp sub-bottom-profiler data.

Conclusions:

  • Bayesian inversion provides a robust framework for studying seabed lateral variability.
  • Accurate uncertainty quantification is key to interpreting geophysical inversion results.
  • The study highlights significant spatial variations in Mediterranean seabed geoacoustic properties.