TY - JOUR

T1 - Generation of large-scale thermospheric disturbances and thermosphere heating by infrasonic waves propagated from tropospheric sources

AU - Кшевецкий, Сергей Петрович

AU - Гаврилов, Николай Михайлович

AU - Карпов, Иван Викторович

AU - Курдяева, Ю.A.

PY - 2015/4

Y1 - 2015/4

N2 - Meteorological processes in the lower atmosphere are the sources of excitation of acoustic gravity waves (AGWs). Fluctuations of atmospheric pressure within a wide range of frequencies, including infrasonic frequencies are evidence of these tropospheric wave sources. We simulate numerically the propagation of waves from tropospheric infrasound sources, and our study concerns the influences of these waves on the atmosphere. Numerical experiments have shown that the small-amplitude infrasound waves can propagate without striking manifestations up to the heights of about 100 km. Only waves propagating with a rather small angle to the vertical, penetrate the thermosphere and heat the thermosphere and generate internal gravity waves. Numerical experiments have revealed that tropospheric sources with spatial scales of several kilometers, are able to create wave disturbances in the thermosphere with spatial scales from tens to one thousand kilometers. The heating effect and generation of gravity waves is significant

AB - Meteorological processes in the lower atmosphere are the sources of excitation of acoustic gravity waves (AGWs). Fluctuations of atmospheric pressure within a wide range of frequencies, including infrasonic frequencies are evidence of these tropospheric wave sources. We simulate numerically the propagation of waves from tropospheric infrasound sources, and our study concerns the influences of these waves on the atmosphere. Numerical experiments have shown that the small-amplitude infrasound waves can propagate without striking manifestations up to the heights of about 100 km. Only waves propagating with a rather small angle to the vertical, penetrate the thermosphere and heat the thermosphere and generate internal gravity waves. Numerical experiments have revealed that tropospheric sources with spatial scales of several kilometers, are able to create wave disturbances in the thermosphere with spatial scales from tens to one thousand kilometers. The heating effect and generation of gravity waves is significant

KW - атмосфера

KW - инфразвук

KW - распространение волн

KW - моделирование

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

M3 - Meeting Abstract

VL - 17

SP - 4107

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 -