Optimal conditions for extra-long-range short-wave propagation

1975 ◽  
Vol 18 (9) ◽  
pp. 1014-1022 ◽  
Author(s):  
S. F. Golyan
Keyword(s):  
Wave Propagation ◽  
Long Range ◽  
Short Wave ◽  
Optimal Conditions

Ultra-Short Wave Propagation*

1933 ◽  
Vol 12 (2) ◽  
pp. 125-161 ◽  
Author(s):  
J. C. Schelleng ◽  
C. R. Burrows ◽  
E. B. Ferrell
Keyword(s):  
Wave Propagation ◽  
Short Wave

Dominant Mechanism of Long-Range Tropospheric VHF Wave Propagation

2020 ◽  
Vol 63 (3) ◽  
pp. 360-365
Author(s):  
O. N. Kiselev ◽  
Y. O. Okhorzina
Keyword(s):  
Wave Propagation ◽  
Long Range ◽  
Dominant Mechanism

Internal waves in a horizontally inhomogeneous flow

1984 ◽  
Vol 142 ◽  
pp. 233-249 ◽  
Author(s):  
A. Ya. Basovich ◽  
L. Sh. Tsimring
Keyword(s):  
Wave Propagation ◽  
Internal Wave ◽  
Internal Waves ◽  
Short Wave ◽  
Wave Transformation ◽  
Wave Trapping ◽  
Wave Amplification ◽  
Normal Surfaces ◽  
Inhomogeneous Flow ◽  
Horizontally Inhomogeneous

The effect of horizontally inhomogeneous flows on internal wave propagation in a stratified ocean with a constant Brunt-Väisälä frequency is analysed. Dispersion characteristics of internal waves in a moving fluid and kinematics of wave packets in smoothly inhomogeneous flows are considered using wave-normal surfaces. It is shown that internal-wave blocking and short-wave transformation may occur in longitudinally inhomogeneous flows. For parallel flows internal-wave trapping is possible in the vicinity of the limiting layer where the wave frequency in the locally comoving frame of reference coincides with the Brunt-Väisälä frequency. Internal-wave trapping also takes place in jet-type flows in the vicinity of the flow-velocity maximum. WKB solutions of the equation describing internal-wave propagation in a parallel horizontally inhomogeneous flow in the linear approximation are obtained. Singular points of this equation and the related effect of internal-wave amplification (overreflection) under the action of the flow are investigated. The spectrum and the growth rate of internal-wave localized modes in a jet-type flow are obtained.

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