TY - JOUR

T1 - Comparisons of linear and nonlinear numerical models of acoustic-gravity wave propagation in the middle and upper atmosphere.

AU - Гаврилов, Николай Михайлович

AU - Шевчук, Никита Олегович

AU - Кшевецкий, Сергей Петрович

AU - Погорельцев, Александр Иванович

PY - 2015

Y1 - 2015

N2 - According to present knowledge, acoustic-gravity waves (AGWs) observed in the upper atmosphere may arise near the Earth surface due to different sources and propagate upwards. Algorithms for two- and three-dimensional numerical simulation of vertical propagation and breaking of nonlinear AGWs from the Earth’s surface to the upper atmosphere were developed recently. The algorithms of the solution of fluid dynamic equations use finite-difference analogues of basic conservation laws. This approach allows us to select physically correct generalized wave solutions of the nonlinear equations. Horizontally moving periodical horizontal sinusoidal structures of vertical velocity on the Earth’s surface serve as AGW sources in the model. Numerical simulation was made in a region of the Earth atmosphere with dimensions up to several thousand kilometers horizontally and 500 km vertically. Vertical profiles of the mean temperature, density, molecular viscosity and thermal conductivity correspond to standard models of the a

AB - According to present knowledge, acoustic-gravity waves (AGWs) observed in the upper atmosphere may arise near the Earth surface due to different sources and propagate upwards. Algorithms for two- and three-dimensional numerical simulation of vertical propagation and breaking of nonlinear AGWs from the Earth’s surface to the upper atmosphere were developed recently. The algorithms of the solution of fluid dynamic equations use finite-difference analogues of basic conservation laws. This approach allows us to select physically correct generalized wave solutions of the nonlinear equations. Horizontally moving periodical horizontal sinusoidal structures of vertical velocity on the Earth’s surface serve as AGW sources in the model. Numerical simulation was made in a region of the Earth atmosphere with dimensions up to several thousand kilometers horizontally and 500 km vertically. Vertical profiles of the mean temperature, density, molecular viscosity and thermal conductivity correspond to standard models of the a

KW - атмосфера

KW - динамика

KW - акустико-гравитационные волны

KW - моделирование

UR - https://elibrary.ru/item.asp?id=29097203

M3 - Meeting Abstract

VL - 17

SP - 1127

JO - Geophysical Research Abstracts

JF - Geophysical Research Abstracts

SN - 1029-7006

IS - EGU2015

T2 - European Geosciences Union General Assembly 2015

Y2 - 11 April 2015 through 16 April 2015

ER -