Gravity Wave Interaction with a Transiently Heated Atmosphere.
Abstract
The report investigates the propagation of internal atmosphere gravity waves in an atmosphere driven into vertical motion by transient heating related to geomagnetic storms. It is shown that wave amplification exists and favors the observation of large amplitude waves near the Brunt-Vaisala period (approx 1000-2000 sec) in the thermosphere during active times. Besides such local frequency selection, the existence of wave-energy enhancement implies that gravity waves not only contribute to the maintenance of the static upper atmosphere but also serve as a means of rapid energy transport from pole to equator during geomagnetically active times. A model of upper atmospheric response to transient heating is proposed and it is shown that the inclusion of these waves leads to an apparent increase in the dynamic heat diffusivity. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 15, 1970
- Accession Number
- AD0715930
Entities
People
- Yam T. Chiu
Organizations
- The Aerospace Corporation