首页|Nonlinear frequency down-conversion of acoustic wave beams in the atmosphere and ionosphere under different types of modulation (regular item)

Nonlinear frequency down-conversion of acoustic wave beams in the atmosphere and ionosphere under different types of modulation (regular item)

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  • NSTL
  • Elsevier
It is investigated theoretically the nonlinear down-conversion of powerful extremely low frequency (ELF) modulated acoustic wave beams at the carrier frequencies 1-20 Hz into ultra-low frequency (ULF) acoustic waves at the frequencies 0.01-0.1 Hz under the propagation upwards within the atmosphere and ionosphere. The approximation of the slowly varying profile is used. It is shown that under a fixed value of the integral power of the initial acoustic ELF beam there exists the optimal value of the initial transverse width where the maximum down-conversion is realized. The different types of the modulation are considered, namely the simplest twofrequency modulation and multifrequency noise-like one. The using of the complex multifrequency modulation results in the increase of the efficiency of the down-conversion within the ionosphere E- and F-layers.

Powerful extremely low frequency acousticwave beamsNonlinear down-conversionUltra-low frequency acoustic wavesAtmosphere-ionosphere couplingGRAVITY-WAVESINFRASONIC WAVESLITHOSPHERIC ORIGINPROPAGATIONTURBULENCEBREAKINGSOUNDFIELDTRANSPARENCYTEMPERATURES

Grimalsky, V、Rapoport, Yu、Tecpoyotl-Torres, M.、Ivantyshyn, O.、Nesterenko, A.

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Autonomous Univ State Morelos UAEM

Taras Shevchenko Natl Univ Kyiv

GV Karpenko Phys Mech Inst NASU

2022

10.1016/j.jastp.2021.105774

Journal of atmospheric and solar-terrestrial physics

Journal of atmospheric and solar-terrestrial physics

EISCI
ISSN：1364-6826
年,卷(期)：2022.227
  • 92