Interannual dynamics in intensity of mesoscale hydroxyl nightglow variations over Almaty

The method of digital difference filters is applied to the data analysis of SATI observations of hydroxyl nightglow intensity and rotational temperature at altitudes 85–90 km over Almaty (43°03' N, 76°58' E), Kazakhstan, in 2010–2017. We examine seasonal and interannual variations in month...

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Main Authors: Popov А.А., Gavrilov N.M., Andreev A.B., Pogoreltsev A.I.
Format: Article
Language:English
Published: INFRA-M 2018-06-01
Series:Solar-Terrestrial Physics
Subjects:
Online Access:https://naukaru.ru/ru/nauka/article/22249/view
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author Popov А.А.
Gavrilov N.M.
Andreev A.B.
Pogoreltsev A.I.
author_facet Popov А.А.
Gavrilov N.M.
Andreev A.B.
Pogoreltsev A.I.
author_sort Popov А.А.
collection DOAJ
description The method of digital difference filters is applied to the data analysis of SATI observations of hydroxyl nightglow intensity and rotational temperature at altitudes 85–90 km over Almaty (43°03' N, 76°58' E), Kazakhstan, in 2010–2017. We examine seasonal and interannual variations in monthly average values and standard deviations of variations with periods 0.4–5.4 hrs, which may be associated with internal gravity waves in the mesopause region. The monthly average temperature near the mesopause has a maximum in winter and a minimum in June. The monthly average intensity has an additional maximum in June. Standard deviation of mesoscale rotational temperature variations and characteristics of internal gravity waves are maximum in spring and autumn. The spring maximum of mesoscale OH emission intensity variations is shifted to June. Interannual variations and multi-year trends of OH rotational temperature and emission intensity may differ in detail. This may be connected with seasonal and long-term variations in the complex system of the photochemical processes, which produce the OH nightglow.
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spelling doaj.art-042fbe125c0245439cb86de2cc0d95452022-12-21T21:03:50ZengINFRA-MSolar-Terrestrial Physics2500-05352018-06-0142636810.12737/stp-42201810Interannual dynamics in intensity of mesoscale hydroxyl nightglow variations over AlmatyPopov А.А.0Gavrilov N.M.1Andreev A.B.2Pogoreltsev A.I.3Saint-Petersburg State University, Saint-Petersburg, RussiaSaint-Petersburg State University, Saint-Petersburg, RussiaInstitute of the Ionosphere, Almaty, KazakhstanSaint-Petersburg State University, Saint-Petersburg, Russia; Russian State Hydro-meteorological University, Saint-Petersburg, RussiaThe method of digital difference filters is applied to the data analysis of SATI observations of hydroxyl nightglow intensity and rotational temperature at altitudes 85–90 km over Almaty (43°03' N, 76°58' E), Kazakhstan, in 2010–2017. We examine seasonal and interannual variations in monthly average values and standard deviations of variations with periods 0.4–5.4 hrs, which may be associated with internal gravity waves in the mesopause region. The monthly average temperature near the mesopause has a maximum in winter and a minimum in June. The monthly average intensity has an additional maximum in June. Standard deviation of mesoscale rotational temperature variations and characteristics of internal gravity waves are maximum in spring and autumn. The spring maximum of mesoscale OH emission intensity variations is shifted to June. Interannual variations and multi-year trends of OH rotational temperature and emission intensity may differ in detail. This may be connected with seasonal and long-term variations in the complex system of the photochemical processes, which produce the OH nightglow.https://naukaru.ru/ru/nauka/article/22249/viewupper atmospherenightglowshydroxylintensityrotational temperatureclimatologyseasonal variationstrendsmesoscale variabilityinternal gravity waves.
spellingShingle Popov А.А.
Gavrilov N.M.
Andreev A.B.
Pogoreltsev A.I.
Interannual dynamics in intensity of mesoscale hydroxyl nightglow variations over Almaty
Solar-Terrestrial Physics
upper atmosphere
nightglows
hydroxyl
intensity
rotational temperature
climatology
seasonal variations
trends
mesoscale variability
internal gravity waves.
title Interannual dynamics in intensity of mesoscale hydroxyl nightglow variations over Almaty
title_full Interannual dynamics in intensity of mesoscale hydroxyl nightglow variations over Almaty
title_fullStr Interannual dynamics in intensity of mesoscale hydroxyl nightglow variations over Almaty
title_full_unstemmed Interannual dynamics in intensity of mesoscale hydroxyl nightglow variations over Almaty
title_short Interannual dynamics in intensity of mesoscale hydroxyl nightglow variations over Almaty
title_sort interannual dynamics in intensity of mesoscale hydroxyl nightglow variations over almaty
topic upper atmosphere
nightglows
hydroxyl
intensity
rotational temperature
climatology
seasonal variations
trends
mesoscale variability
internal gravity waves.
url https://naukaru.ru/ru/nauka/article/22249/view
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