Efficient numerical simulation of stochastic internal-wave-induced sound-speed perturbation fields

J. A. Colosi, M. G. Brown

Research output: Contribution to journalArticle

103 Scopus citations


An efficient method is presented to numerically simulate stochastic internal-wave-induced sound-speed perturbation fields in deep ocean environments. The sound-speed perturbation field is represented as an internal-wave eigenfunction expansion in which WKB amplitude scaling and stretching of the depth coordinate are exploited. Individual realizations of the sound-speed perturbation field are constructed by evaluating a multidimensional fast Fourier transform of a complex-valued function whose modulus has a known simple form and whose phase is random. Approximations made are shown to be consistent with approximations built into the Garrett- Munk internal-wave spectrum, which is the starting point of this analysis. Both time-varying internal-wave fields in three space dimensions and frozen fields in a vertical plane are considered.

Original languageEnglish (US)
Pages (from-to)2232-2235
Number of pages4
JournalJournal of the Acoustical Society of America
Issue number4
StatePublished - Jan 1 1998
Externally publishedYes


ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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