Open AccessModelling of scattering of seismic waves from a corrugated rough sea surface: a comparison of three methods
Author(s) -
Robertsson Johan O. A.,
Laws Robert,
Chapman Chris,
Vilotte JeanPierre,
Delavaud Elise
Publication year - 2006
Publication title -
geophysical journal international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0956-540X
DOI - 10.1111/j.1365-246x.2006.03115.x
Subject(s) - coda , amplitude , scattering , reflection (computer programming) , surface (topology) , surface wave , geology , plane (geometry) , optics , plane wave , finite element method , rough surface , seismic wave , seismology , geometry , physics , materials science , mathematics , computer science , programming language , composite material , thermodynamics
SUMMARY We compare three numerical methods to model the sea surface interaction in a marine seismic reflection experiment (the frequencies considered are in the band 10–100 Hz): the finite‐difference method (FDM), the spectral element method (SEM) and the Kirchhoff method (KM). A plane wave is incident at angles of 0° and 30° with respect to the vertical on a rough Pierson–Moskowitz surface with 2 m significant wave height and the response is synthesized at 6, 10 and 50 m below the average height of the sea surface. All three methods display an excellent agreement for the main reflected arrival. The FDM and SEM also agree very well all through the scattered coda. The KM shows some discrepancies, particularly in terms of amplitudes.