Details

Autor(en) / Beteiligte

• Rudenko, G.V.
• Dmitrienko, I.S.

Titel

Oscillations of a vertically stratified dissipative atmosphere. II. Low frequency trapped modes

Ist Teil von

• Journal of atmospheric and solar-terrestrial physics, 2016-05, Vol.142, p.137-149

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Trapped atmosphere waves, such as IGW waveguide modes and Lamb modes, are described using dissipative solution above source (DSAS) (Dmitrienko and Rudenko, 2016). According to this description, the modes are disturbances penetrating without limit in the upper atmosphere and dissipating their energy throughout the atmosphere; leakage from a trapping region to the upper atmosphere is taken into consideration. The DSAS results are compared to those based on both accurate and WKB approximated dissipationless equations. It is shown that the spatial and frequency characteristics of modes in the upper atmosphere calculated by any of the methods are close to each other and are in good agreement with the observed characteristics of traveling ionospheric disturbances. •We describe IGW waveguide modes and Lamb modes.•We analyze the conditions of applicability of WKB.•We apply our results to TIDs.