The IRI Grid System for Use with WAVEWATCH 3
Abstract
This report describes a grid system created for use with the wave model WAVEWATCH III. The system uses three grids: irregular grids at high latitudes and a regular grid at low latitudes, and so it is referred to as Irregular-Regular-Irregular (IRI). There is two-way exchange of information (wave spectra boundary forcing) between grids. The grid system achieves efficiency by minimizing the variability of grid spacing, which allows a larger time step size. The northern grid extends to very high latitude (89N), and propagation is computed at third order accuracy. IRI systems have been created for four different resolutions: approximately 1/2, 1/4, 1/6, and 1/8. The report includes a review of advantages and disadvantages of different grid approaches; a description of important design considerations; a description of the four designs; timings; validation samples; and a discussion of the operational context (existing and future systems).
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 21, 2018
- Accession Number
- AD1065566
Entities
People
- Erick Erick Rogers
- Robert S. Linzell
Organizations
- United States Naval Research Laboratory