Atmospheric Gravity Waves Generation by Solar Terminator According to “Atmosphere Explorer-E” Satellite Data
The upperatmospheric neutral and ionized components dynamical response on a moving solar terminator is investigated employing the direct satellite measurements. The observations from “Atmosphere Explorer-E” are analyzed for the period of the satellite being in a circular near-equatorial orbit with t...
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| Date: | 2013 |
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| Main Authors: | , |
| Format: | Article |
| Language: | Russian |
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Видавничий дім «Академперіодика»
2013
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| Online Access: | http://rpra-journal.org.ua/index.php/ra/article/view/659 |
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| Journal Title: | Radio physics and radio astronomy |
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Radio physics and radio astronomy| _version_ | 1856543442913460224 |
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| author | Lizunov, G. V. Fedorenko, A. K. |
| author_facet | Lizunov, G. V. Fedorenko, A. K. |
| author_sort | Lizunov, G. V. |
| baseUrl_str | |
| collection | OJS |
| datestamp_date | 2013-02-09T11:42:51Z |
| description | The upperatmospheric neutral and ionized components dynamical response on a moving solar terminator is investigated employing the direct satellite measurements. The observations from “Atmosphere Explorer-E” are analyzed for the period of the satellite being in a circular near-equatorial orbit with the inclination <i>i</i>=19.7° and height 250-300 km. It came to light that the terminator generates the large-scale atmospheric gravity waves (AGW) and traveling ionospheric disturbances (TID) with the following parameters: the horizontal wavelength of about 1200-1600 km; the calculated period of about 50 min; the wavetrain duration of four-to-six periods; the relative AGW amplitude of several percent; the relative TID amplitude at sunrise terminator of about several percent, rising to tens percent at sunset terminator. The primary ion O<sup>+</sup> density oscillates in opposite phase, while that of molecular ions NO<sup>+</sup> and O<sub>2</sub><sup>+</sup> does in phase, with the density oscillations of the main neutral components N<sub>2</sub> and O. The experimental findings are interpreted in terms of the theory of AGW propagation in a multi-component gas medium. It is shown that the amplitude and phase distinctions in the oscillations of atmospheric components (including the main ionic component O<sup>+</sup>) are caused by the differences in their vertical distributions above the turbo-pause. The mechanism of AGW and TID generation at the F-region heights due to electron gas pressure gradient is suggested. |
| first_indexed | 2025-12-02T15:50:01Z |
| format | Article |
| id | rpra-journalorgua-article-659 |
| institution | Radio physics and radio astronomy |
| language | Russian |
| last_indexed | 2025-12-02T15:50:01Z |
| publishDate | 2013 |
| publisher | Видавничий дім «Академперіодика» |
| record_format | ojs |
| spelling | rpra-journalorgua-article-6592013-02-09T11:42:51Z Atmospheric Gravity Waves Generation by Solar Terminator According to “Atmosphere Explorer-E” Satellite Data Генерация атмосферных гравитационных волн солнечным терминатором по данным измерений на спутнике “Atmosphere Explorer-E” Lizunov, G. V. Fedorenko, A. K. The upperatmospheric neutral and ionized components dynamical response on a moving solar terminator is investigated employing the direct satellite measurements. The observations from “Atmosphere Explorer-E” are analyzed for the period of the satellite being in a circular near-equatorial orbit with the inclination <i>i</i>=19.7° and height 250-300 km. It came to light that the terminator generates the large-scale atmospheric gravity waves (AGW) and traveling ionospheric disturbances (TID) with the following parameters: the horizontal wavelength of about 1200-1600 km; the calculated period of about 50 min; the wavetrain duration of four-to-six periods; the relative AGW amplitude of several percent; the relative TID amplitude at sunrise terminator of about several percent, rising to tens percent at sunset terminator. The primary ion O<sup>+</sup> density oscillates in opposite phase, while that of molecular ions NO<sup>+</sup> and O<sub>2</sub><sup>+</sup> does in phase, with the density oscillations of the main neutral components N<sub>2</sub> and O. The experimental findings are interpreted in terms of the theory of AGW propagation in a multi-component gas medium. It is shown that the amplitude and phase distinctions in the oscillations of atmospheric components (including the main ionic component O<sup>+</sup>) are caused by the differences in their vertical distributions above the turbo-pause. The mechanism of AGW and TID generation at the F-region heights due to electron gas pressure gradient is suggested. По данным прямых спутниковых измерений исследован динамический отклик нейтральных и ионизированных компонент верхней атмосферы на прохождение терминатора. Проанализированы наблюдения на “Atmosphere Explorer-E” за период, когда спутник находился на круговой околоэкваториальной орбите с наклонением i=19.7° и высотой 250-300 км. Установлено, что на терминаторе происходит генерация крупномасштабных атмосферных гравитационных волн (АГВ) и перемещающихся ионосферных возмущений (ПИВ) с параметрами: горизонтальная длина волны – 1200-1600 км; вычисленный период – около 50 мин; длительность волнового цуга – четыре-шесть периодов; относительная амплитуда АГВ – до нескольких процентов; относительная амплитуда ПИВ утром – до нескольких процентов, вечером – до десятков процентов, причем колебания концентрации основного иона O+ происходят в противофазе, а молекулярных ионов NO+ и O2+ в фазе с колебаниями концентраций основных нейтральных компонент N2, O. На основе теории распространения АГВ в многокомпонентной газовой среде дана интерпретация экспериментальных результатов. Показано, что амплитудные и фазовые отличия колебаний атмосферных компонент, включая основной ион O+, вызваны различием их вертикальных распределений выше турбопаузы. Предложен механизм генерации АГВ и ПИВ на высотах F-области за счет градиента электронного давления на терминаторе. Видавничий дім «Академперіодика» 2013-02-09 Article Article application/pdf http://rpra-journal.org.ua/index.php/ra/article/view/659 РАДИОФИЗИКА И РАДИОАСТРОНОМИЯ; Vol 11, No 1 (2006); 49 RADIO PHYSICS AND RADIO ASTRONOMY; Vol 11, No 1 (2006); 49 РАДІОФІЗИКА І РАДІОАСТРОНОМІЯ; Vol 11, No 1 (2006); 49 2415-7007 1027-9636 ru http://rpra-journal.org.ua/index.php/ra/article/view/659/210 |
| spellingShingle | Lizunov, G. V. Fedorenko, A. K. Atmospheric Gravity Waves Generation by Solar Terminator According to “Atmosphere Explorer-E” Satellite Data |
| title | Atmospheric Gravity Waves Generation by Solar Terminator According to “Atmosphere Explorer-E” Satellite Data |
| title_alt | Генерация атмосферных гравитационных волн солнечным терминатором по данным измерений на спутнике “Atmosphere Explorer-E” |
| title_full | Atmospheric Gravity Waves Generation by Solar Terminator According to “Atmosphere Explorer-E” Satellite Data |
| title_fullStr | Atmospheric Gravity Waves Generation by Solar Terminator According to “Atmosphere Explorer-E” Satellite Data |
| title_full_unstemmed | Atmospheric Gravity Waves Generation by Solar Terminator According to “Atmosphere Explorer-E” Satellite Data |
| title_short | Atmospheric Gravity Waves Generation by Solar Terminator According to “Atmosphere Explorer-E” Satellite Data |
| title_sort | atmospheric gravity waves generation by solar terminator according to “atmosphere explorer-e” satellite data |
| url | http://rpra-journal.org.ua/index.php/ra/article/view/659 |
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