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Modeling of the effect of internal gravity waves on upper atmospheric conditions during sudden stratospheric warming

机译：平流层突然变暖期间内部重力波对高空条件的影响建模

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摘要

We present results of modeling of the effect of internal gravity waves (IGW), excited in the region of development of a sudden stratospheric warming (SSW), on upper atmospheric conditions. In the numerical experiment, we use a two-dimensional model of propagation of atmospheric waves, taking into account dissipative and nonlinear processes accompanying wave propagation. As a source of disturbances we consider temperature and density disturbances in the stratosphere during SSWs. Amplitude and frequency characteristics of the source of disturbances are estimated from observations and IGW theory. Numerical calculations showed that waves generated at stratospheric heights during SSW can cause temperature changes in the upper atmosphere. Maximum relative disturbances, caused by such waves, with respect to quiet conditions are observed at 100–200 km. Disturbances of the upper atmosphere in turn have an effect on the dynamics of charged component in the ionosphere and can contribute to observable ionospheric effects of SSW.
机译：我们介绍了内部引力波（IGW）在高层大气条件下在平流层突然变暖（SSW）的发展区域中激发的影响的建模结果。在数值实验中，考虑到伴随波传播的耗散和非线性过程，我们使用了二维的大气波传播模型。作为扰动源，我们考虑了SSW期间平流层的温度和密度扰动。干扰源的幅度和频率特性是根据观测和IGW理论估算的。数值计算表明，SSW期间在平流层高度产生的波会引起高层大气的温度变化。在100–200 km处，观察到由此类波引起的相对于安静条件的最大相对干扰。高层大气的扰动反过来又对电离层中带电组分的动力学产生影响，并可能有助于观测SSW的电离层效应。

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