Range-dependent acoustic tomography: modeling an upwelling filament using an asymmetric Gaussian function

C. Soares,
S.M. Jesus,
SiPLAB - FCT, University of Algarve
Campus de Gambelas,
PT-8000 Faro, Portugal

Comments: download file (pdf)
Ref.: SiPLAB Report 05/03, University of Algarve,2003.

Abstract: Acoustic tomography in range-dependent waveguides using source-array pair represents an inverse problem with many potential solutions. The present problem is to model an upwelling filament which is a localized up rise of cold water and introducing a high degree pf range dependence. In this study a parameterization scheme with a reduced number of parameters is proposed in order to represent the spatial evolution of the filament using an asymmetric Gaussian function parameterized by two variances, an amplitude coefficient and a mean value. Using a real data example of the filament of the California current system, this modelling scheme is tested on semi-synthetic data. The results indicate that such an approach can be considered for an efficient modelling of a complex oceanographic feature.

ACKNOWLEDGMENT: this work was supported by ATOMS project (FCT, Portugal).