TY - CONF

T1 - Numerical Modeling of Nonlinear Acoustic-Gravity Wave Propagation in the Whole Atmosphere

AU - Gavrilov, N. M.

AU - Kshevetskii, S. P.

PY - 2014

Y1 - 2014

N2 - Simulations show that AGWs may transport amplitude modulation of tropospheric wave sources in horizontal directions to the other altitudes up to very high levels. Low wave amplitudes in the beginning of transition processes after activation of atmospheric wave sources could be additional reasons for slower amplitude grows with height compared to the nondissipative exponential grows predicted for stationary linear AGWs. Production of wave-induced mean jets and their superposition with nonlinear unstable dissipative AGWs can produce strong narrow peaks of horizontal speed in the upper atmosphere. This may increase the role of transient nonstationary waves in effective energy transport and variations of atmospheric parameters and gas admixtures in a broad altitude range.

AB - Simulations show that AGWs may transport amplitude modulation of tropospheric wave sources in horizontal directions to the other altitudes up to very high levels. Low wave amplitudes in the beginning of transition processes after activation of atmospheric wave sources could be additional reasons for slower amplitude grows with height compared to the nondissipative exponential grows predicted for stationary linear AGWs. Production of wave-induced mean jets and their superposition with nonlinear unstable dissipative AGWs can produce strong narrow peaks of horizontal speed in the upper atmosphere. This may increase the role of transient nonstationary waves in effective energy transport and variations of atmospheric parameters and gas admixtures in a broad altitude range.

M3 - Abstract

SP - 0019

T2 - 40th COSPAR Scientific Assembly 2014

Y2 - 2 August 2014 through 10 August 2014

ER -