Accession Number:

ADA612618

Title:

Moored Observations to Define the Structure and Energetics of Non-Linear Internal Wave Generation Over the New Jersey Shelf

Descriptive Note:

Annual rept.

Corporate Author:

OREGON STATE UNIV CORVALLIS COLL OF OCEANIC AND ATMOSPHERIC SCIENCES

Personal Author(s):

Report Date:

2006-09-30

Pagination or Media Count:

6.0

Abstract:

LONG-TERM GOALS To further our understanding of NLIW generation, to aid our NLIW prediction ability, and to quantify NLIW effects on acoustics, optics, energy dissipation, and momentum transfer in the coastal ocean. OBJECTIVES What environmental factors define the structure and energetics of non-linear internal wave generation, and how can theses be used to predict intensity and quality of a wave packet. Specifically Under what conditions stratification, barotropic forcing and topography are NLIWs generated What factors determine whether waves of elevation or waves of depression form How are these influenced by the location of the shelf-break front What are the generation mechanisms 1. barotropic via either a nonlinear version of Baines 1982, or a controlled hydraulic flow which is released at low Froude numbers or, 2. baroclinic, whereby a nearly-linear internal tide is generated and undergoes nonlinear transformations either locally or after having propagated many wavelengths. What are the conversion efficiencies i.e., the rates of energy transfer from linear to nonlinear waves, or from barotropic to baroclinic waves, and what fraction is dissipated locally What fraction radiates away from the shelf break forming the red beams in figure 2. How do the near-bottom and near-surface signatures differ for these two types of waves. How important is the bottom stress Can a surface expression for waves of elevation be detected

Subject Categories:

  • Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE