Critical level influence on the spectra of secondary gravity waves in the middle and upper atmosphere

Гаврилов Николай Михайлович; Кшевецкий Сергей Петрович; Коваль Андрей Владиславович; Курдяева Юлия Андреевна

doi:10.12737/stp-121202612

УДК 551.511.31

CRITICAL LEVEL INFLUENCE ON THE SPECTRA OF SECONDARY GRAVITY WAVES IN THE MIDDLE AND UPPER ATMOSPHERE Critical level influence on the spectra of secondary gravity waves in the middle and upper atmosphere

АА Аа

Опубликовано в Solar-Terrestrial Physics · Том 12, Номер 1 · Страницы 105–113 · Рубрика: Results of current research

DOI: https://doi.org/10.12737/stp-121202612 · EDN: IDYRNC

Получено: 18.07.2025 Одобрено: 15.10.2025 Опубликовано: 24.03.2026 Язык публикаций: en-US

Авторы

ГА

Гаврилов Николай Михайлович

ORCID

КШ

Кшевецкий Сергей Петрович

КО

Коваль Андрей Владиславович

КУ

Курдяева Юлия Андреевна

ГА

Гаврилов Николай Михайлович

Ученая степень: доктор физико-математических наук

Санкт-Петербургский государственный университет Профессор · Кафедра физики атмосферы · Россия · Санкт-Петербург

ORCID

КШ

Кшевецкий Сергей Петрович

Ученая степень: доктор физико-математических наук

Санкт-Петербургский государственный университет Россия · Санкт-Петербург

Балтийский федеральный университет имени И. Канта Россия · Калининград

КО

Коваль Андрей Владиславович

Ученая степень: кандидат физико-математических наук

Санкт-Петербургский государственный университет старший научный сотрудник · Кафедра физики атмосферы · Россия · Санкт-Петербург

КУ

Курдяева Юлия Андреевна

Калининградский филиал Института земного магнетизма, ионосферы и распространения радиоволн им. Н.В. Пушкова РАН Россия · Калиниград

АННОТАЦИЯ

A high-resolution nonlinear numerical model is used to simulate propagation of internal gravity waves (IGWs) from the troposphere to the upper atmosphere. This simulation takes into account background wind profiles containing critical levels at which the horizontal wind velocity becomes equal to the horizontal phase speed of IGW. According to traditional linear theories of atmospheric waves, near critical levels the vertical wavelength approaches zero, which should lead to a strong dissipation of IGWs propagating from the troposphere and may significantly decrease their amplitudes in the upper atmosphere. The wave sources in the model are defined as vertical velocity perturbations propagating along the Earth surface. The mean horizontal wind in the atmosphere is approximated by the Gaussian profile with a maximum at an altitude of 50 km. We analyze the spectra of wave fields near critical levels and at a distance from them. It has been found that the instability of waves near critical levels intensifies the energy transition from primary IGWs propagating from surface sources to secondary wave modes. This causes an increase in spectral peaks at wavelengths shorter than the horizontal length of primary IGW. Therefore, above critical levels, spectral modes with shorter horizontal wavelengths begin to prevail with increasing altitude, and the amplitudes of these secondary waves at the same altitudes can exceed the amplitudes of analogous primary IGW propagating in the absence of critical levels in the middle atmosphere.

КЛЮЧЕВЫЕ СЛОВА

acoustic-gravity waves, spectrum, secondary waves, numerical simulation, upper atmosphere, middle atmosphere

Финансирование

This research was financially supported by the Russian Science Foundation (Grant No. 25-17-00166)

Текст

Текст (английский) (PDF)

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ГОСТ

Гаврилов Н. М., Кшевецкий С. П., Коваль А. В., Курдяева Ю. А. Critical level influence on the spectra of secondary gravity waves in the middle and upper atmosphere // Solar-Terrestrial Physics. 2026. № 1. С. 105-113. DOI: https://doi.org/10.12737/stp-121202612. EDN: IDYRNC. (дата обращения: 13.11.2026).

MLA

Гаврилов Николай Михайлович, Кшевецкий С. П., Коваль А. В., Курдяева Ю. А.. "Critical level influence on the spectra of secondary gravity waves in the middle and upper atmosphere." Solar-Terrestrial Physics 12.1 (2026): 105-113. DOI: https://doi.org/10.12737/stp-121202612. EDN: IDYRNC.

APA

Гаврилов Н. М., Кшевецкий С. П., Коваль А. В., Курдяева Ю. А. (2026). Critical level influence on the spectra of secondary gravity waves in the middle and upper atmosphere. Solar-Terrestrial Physics, 12(1), 105-113. https://doi.org/10.12737/stp-121202612 EDN: IDYRNC.

Chicago

Гаврилов Николай Михайлович, Кшевецкий С. П., Коваль А. В., Курдяева Ю. А.. "Critical level influence on the spectra of secondary gravity waves in the middle and upper atmosphere." Solar-Terrestrial Physics 12, no. 1 (2026): 105-113. https://doi.org/10.12737/stp-121202612. EDN: IDYRNC.

WIKI

{{cite journal | author = Гаврилов Н. М., Кшевецкий С. П., Коваль А. В., Курдяева Ю. А. | title = Critical level influence on the spectra of secondary gravity waves in the middle and upper atmosphere | journal = Solar-Terrestrial Physics | year = 2026 | volume = 12 | issue = 1 | pages = 105-113 | doi = 10.12737/stp-121202612 }} EDN: IDYRNC

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CRITICAL LEVEL INFLUENCE ON THE SPECTRA OF SECONDARY GRAVITY WAVES IN THE MIDDLE AND UPPER ATMOSPHERE Critical level influence on the spectra of secondary gravity waves in the middle and upper atmosphere

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