Accession Number : ADA158726


Title :   Studies of Gravity Wave Propagation in the Middle Atmosphere.


Descriptive Note : Annual rept. 11 Feb 84-11 Feb 85,


Corporate Author : PHYSICAL DYNAMICS INC BELLEVUE WA


Personal Author(s) : Dunkerton,T J


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a158726.pdf


Report Date : 25 Mar 1985


Pagination or Media Count : 24


Abstract : Research represents an effort to understand the role of gravity waves in the general circulation of the atmosphere. Such waves exist on a wide range of scales and frequencies. In this report, we describe ray tracing of gravity waves of horizontal scales from 50 to 800 km, all of which are observed in the middle atmosphere and play an essential role in the transport of momentum and mixing of constituents. Also presented are numerical simulations of gravity wave, mean-flow interaction, focusing on two aspects of this process: saturation and self-acceleration. Model results are compared to the predictions of a semi-analytic model of gravity waves. Finally, the report concludes with a discussion of constituent mixing in gravity wave breakdown, and problems in this area meriting further study.


Descriptors :   *GRAVITY WAVES , MESOSPHERE , NUMERICAL ANALYSIS , SCALE , TRANSPORT , MIXING , HORIZONTAL ORIENTATION , RANGE(EXTREMES) , RAY TRACING , CIRCULATION , MOMENTUM


Subject Categories : Atmospheric Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE