Accession Number:

ADA210521

Title:

IFD (Implicit Finite Difference): Interfaced with Harvard Open Ocean Model Forecasts

Descriptive Note:

Summary rept.

Corporate Author:

NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT

Report Date:

1989-05-30

Pagination or Media Count:

27.0

Abstract:

In 1982, the implicit finite difference IFD computer model was developed by Lee and Botseas at NUSC for solving the parabolic wave equation. The IFD model was designed to predict acoustics propagation in both range-dependent and range-independent undersea environments. Given an environment, the IFD model marches the acoustics solution in the water column forward, step-by-step, until maximum range has been reached. The capability to interface the IFD computer model with mesoscale forecasts generated by the Harvard Open Model is announced. Given the latitude and longitude of the source location, the IFD model extracts from the 3-dimensional Harvard data set sound speed profiles encountered in the direction of propagation. Contour plots are set containing both warm- and cold-core eddies in the vicinity of the Gulf Stream. Acoustic propagation loss through a cold-core eddy is presented. A listing of the subroutine that links IFD with the Harvard data set is included. Keywords Eddies fluid mechanics Acoustic data Cold core eddy Gulf Stream Mesosphere forecasts Warm core eddy.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE