Abstract
Abstract Two- and four-layer models of the atmosphere up to heights of about 500 km allow a systematic and fairly accurate account of the far-field properties of guided internal and surface gravity waves having periods >10 min. Simple formulae and numerical results are given for a variety of models allowing one to determine the importance of such effects as compressibility, free vs rigid boundaries, layering, and the earth's rotation. The importance of coupling effects similar to those occurring in layered acoustic and electromagnetic waveguides is emphasized. It is also shown, in the period pass-band between 10 and 200 min, that there is in all models a difference between surface and internal wave group velocities of sufficient magnitude to preclude confusion in the travel times of these modes. It is also stressed that the layer of atmosphere between altitudes of 110 and 150 km, in which the Vaisala frequency may exceed the acoustic cut-off frequency, plays a critical role in determining the amplitude of...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
