Accession Number:

ADA207871

Title:

Propagation and Saturation of Nonlinear Inertia-Gravity Waves in the Atmosphere

Descriptive Note:

Final rept. 15 Feb 1986-14 Feb 1989

Corporate Author:

NORTHWEST RESEARCH ASSOCIATES INC BELLEVUE WA

Personal Author(s):

Report Date:

1989-04-14

Pagination or Media Count:

29.0

Abstract:

Inertia gravity waves play a significant role in the transport of momentum, heat, and constituents in the terrestrial atmosphere. This transport process is subgrid scale in general circulation models and must be parameterized. A generalized parameterization scheme is developed in which a gravity wave is subject to localized breaking that creates turbulent mixing and retards amplitude growth. The effect of turbulence localization on turbulent viscosity, diffusivity and mean flow acceleration is described for the convectively unstable case. Possible generalizations to Kelvin-Helmholtz breaking are suggested. Numerical simulations at high resolution illustrate the evolution to small scales characteristic of convective instability.

Subject Categories:

  • Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE