On a mechanism for ducting of acoustic and short-period acoustic-gravity waves by the upper atmospheric thermocline

Details On a mechanism for ducting of acoustic and short-period acoustic-gravity waves by the upper atmospheric thermocline On a mechanism for ducting of acoustic and short-period acoustic-gravity waves by the upper atmospheric thermocline

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993angeo..11..372n&link_type=abstract

Annales Geophysicae (ISSN 0992-7689), vol. 11, no. 5, p. 372-376.

Computer Science

Sound

8

Acoustic Propagation, Gravity Waves, Temperature Profiles, Thermoclines, Upper Atmosphere, Mesopause, Propagation Modes, Sound Waves

Scientific paper

In this paper, we prove analytically that the upper atmospheric thermocline can support ducted acoustic and acoustic-gravity waves without the necessity of including a ground rigid surface, or a soundspeed minimum at the mesopause, or dissipative mechanisms. By considering a suitable monotonically increasing temperature profile, close to the average atmospheric profile, we obtain the dispersion relation for the guided modes together with the associated eigensolutions.

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