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A simulation study of shallow water tomography for coastal monitoring
Carrière, O.; Hermand, J.-P.; Stephan, Y. (2008). A simulation study of shallow water tomography for coastal monitoring. J. Acoust. Soc. Am. 123(5): 3912.
In: Journal of the Acoustical Society of America. American Institute of Physics: New York, etc.. ISSN 0001-4966, more
Peer reviewed article  

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Document type: Summary

Authors  Top 
  • Carrière, O., more
  • Hermand, J.-P., more
  • Stephan, Y.

    Developing operational oceanographic models for coastal environment is an exciting challenge for the next decades. The typical sparsity of assimilated in-situ observations often creates biases in the model predictions reducing the overall accuracy of the forecasting. In such a highly dynamic environment, acoustic tomography can be a good candidate to provide synoptic measurements over wide areas while a range-dependent inversion scheme allows to achieve a reasonable spatial resolution. In this work, we present simulation results of a Kalman-based assimilation of ocean-acoustic data for a basic model of the Ushant front west off Britanny. In a first part, a single vertical slice tomography experiment is simulated for a static front model to study in which way the modal propagation of a multifrequency acoustic signal is affected by the characteristics of the front (position, intensity). In a second part, the problem of assimilating full-field acoustic data into a dynamic model and tracking of the range-dependent sound-speed field is addressed.

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