Analysis and Investigation of the Effects of Atmospheric Gravity Waves on Infrared Emissions.
Abstract
The effects of atmospheric gravity waves on the spatial and temporal variability of infrared radiance (IR), have been investigated, beginning with an analysis of the effects of such waves on the number densities of various minor species which produce the more important infrared radiance. the results show the following features. (1) The spatial structures produced by gravity waves depend strongly on the excitation mechanism for the minor species. If the excitation is local such as for the 0H emissions, the structures in IR are sharply pronounced. If the excitation in integrated over extended sources, the structures are less sharply pronounced. (2) The temporal variance is far less influenced by the nature of the excitation. (3) The spatial structures increase with height. (4) Gravity waves with short vertical wave length compared to background structures produced both spatial and temporal variance in IR. (5) Gravity waves with long vertical wave length compared to background structures produce only temporal variance in IR. (6) Large amplitude gravity waves can produce instability and secondary IR structures with far more rapid temporal variance as well as more pronounced spatial variance. A dispersion relation for an inhomogeneous atmosphere has beend enveloped for analyzing gravity waves and can be used even when there is heavy wave reflection. The relation reduces to the well-known Hines' dispersion relation in a homogeneous isothermal atmosphere. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 30, 1983
- Accession Number
- ADA148014
Entities
People
- T. F. Tuan
Organizations
- University of Cincinnati