Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 13708 10.12737/22288 Results of current research Results of current research Results of current research Modeling of the effect of internal gravity waves on upper atmospheric conditions during sudden stratospheric warming Modeling of the effect of internal gravity waves on upper atmospheric conditions during sudden stratospheric warming Васильев Павел Анатольевич Vasilyev Pavel Anatol'evich pvasiliev93@gmail.com Карпов Иван Викторович Karpov Ivan Viktorovich ivkarpov@inbox.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Кшевецкий Сергей Петрович Kshevetskii Sergey Petrovich spkshev@gmail.com

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Балтийский федеральный университет имени И. Канта Калининград Россия I. Kant Baltic Federal University Kaliningrad Russian Federation Калининградский филиал Института земного магнетизма, ионосферы и распространения радиоволн им. Н.В. Пушкова РАН Калининград Россия West Department of Pushkov Institute of Terrestrial Mag-netism, Ionosphere and Radio Wave Propagation RAS Kaliningrad Russian Federation Балтийский федеральный университет имени И. Канта Калининград Россия I. Kant Baltic Federal University Kaliningrad Russian Federation Санкт-Петербургский государственный университет Санкт-Петербург Россия St. Petersburg State University Saint Petersburg Russian Federation Балтийский федеральный университет имени И. Канта Калининград Россия I. Kant Baltic Federal University Kaliningrad Russian Federation 24 10 2016 24 10 2016 2 3 99 105 https://naukaru.ru/en/nauka/article/13708/view

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.

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.

 Internal gravity waves Sudden stratospheric warmings Modeling Internal gravity waves Sudden stratospheric warmings Modeling

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