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Synthetic modelling of acoustical propagation applied to seismic oceanography experiments
Author(s) -
Kormann Jean,
Cobo Pedro,
Biescas Berta,
Sallarés Valentí,
Papenberg Cord,
Recuero Manuel,
Carbonell Ramón
Publication year - 2010
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2009gl041763
Subject(s) - geology , synthetic data , seismology , geophysics , acoustics , algorithm , computer science , physics
Recent work shows that multichannel seismic (MCS) systems provide detailed information on the oceans' finestructure. The aim of this paper is to analyze if high order numerical algorithms are suitable to accurately model the extremely weak wavefield scattered by the oceans' finestructures. For this purpose, we generate synthetic shot records along a coincident seismic and oceanographic profile acquired across a Mediterranean salt lens in the Gulf of Cadiz. We apply a 2D finite‐difference time‐domain propagation model, together with second‐order Complex Frequency Shifted Perfectly Matched Layers at the numerical boundaries, using as reference a realistic sound speed map with the lateral resolution of the seismic data. We show that our numerical propagator creates an acoustical image of the ocean finestructures including the salt lens that reproduces with outstanding detail the real acquired one.