Accession Number:

ADA555061

Title:

TSA - A Two Scale Approximation for Wind-Generated Ocean Surface Waves

Descriptive Note:

Corporate Author:

BEDFORD INST OF OCEANOGRAPHY DARTMOUTH (NOVA SCOTIA)

Personal Author(s):

Report Date:

2011-09-01

Pagination or Media Count:

6.0

Abstract:

To provide an accurate, efficient, computational model two-scale approximation, TSA for the 4-wave interactions, in operational wave forecast models, suitable for global, basin and coastal scale applications, and able to transition seamlessly from deep to shallow water. Fully test TSA with respect to exact codes for the full Boltzmann integral FBI, for durationlimited, fetch-limited wave growth, turning winds, swell-windsea, interactions, etc. Numerically investigate and clarify the basis for TSA, its limitations, errors, enhancements, improvements, self-similarity properties, and spectral flux properties. Implement TSA in a variety of modern operational wave forecast models, e.g. WAVEWATCHTM WW3 and SWAN for extensive tests on important, realistic wave conditions. Derive, adapt and implement new formulations for source terms, Sin and Sds, from recent literature and the NOPP partnership, with TSA, in modern wave models, for tests, including veering or accelerating winds, sea and swell interactions, and real storm cases.

Subject Categories:

  • Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE