Accession Number : ADA259659


Title :   Nonlinear Gravity Wave Transport and Its Role in the General Circulation of the Atmosphere.


Descriptive Note : Final rept. 15 Apr 1989-14 Apr 1992


Corporate Author : NORTHWEST RESEARCH ASSOCIATES INC BELLEVUE WA


Personal Author(s) : Dunkerton, Timothy J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a259659.pdf


Report Date : 14 Jun 1992


Pagination or Media Count : 28


Abstract : Gravity waves play a significant role in the transport of momentum, heat, and constituents in the terrestrial atmosphere. Due to mean-flow shear, the gravity wave critical layer is a locus of isentropic overturning, secondary convective instability, turbulence, and mean flow acceleration. These processes were simulated numerically in a two-dimensional model, and a convective saturation hypothesis for breaking gravity waves was confirmed. The role of parameterized wave transport in the quasi-biennial oscillation, and effects of angular momentum advection by the mean meridional circulation, were also addressed.


Descriptors :   *EARTH ATMOSPHERE , *CONVECTION(ATMOSPHERIC) , *GRAVITY WAVES , HEAT TRANSFER , MATHEMATICAL MODELS , MODELS , LAYERS , TWO DIMENSIONAL , ACCELERATION , TURBULENCE , ATMOSPHERIC MOTION , SATURATION , TRANSPORT , MEAN , OSCILLATION , CIRCULATION , ADVECTION , INSTABILITY , ATMOSPHERES , MOMENTUM , ATMOSPHERIC TIDES , LOCUS , JET STREAMS , ANGULAR MOMENTUM


Subject Categories : Meteorology


Distribution Statement : APPROVED FOR PUBLIC RELEASE