Formation of large-scale disturbances in the upper atmosphere caused by acoustic gravity wave sources on the Earth’s surface

Карпов, И. В.; Кшевецкий, С. П.

doi:10.1134/s0016793214040173

Cited by 33 publications

(18 citation statements)

References 10 publications

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“…Further, [59] showed that, under conditions of meteorological disturbances, AGWs are excited with short periods, which when propagating vertically, can reach the heights of the ionosphere in 2-3 h [61,82]. Similar conclusions follow from the works [83][84][85], where it was shown that waves with periods close to the Brunt-Väisälä period are capable of propagating almost vertically and reaching the heights of the ionosphere. The effects of such waves are manifested in processes caused by wave dissipation and atmospheric turbulization at heights of the mesosphere and lower thermosphere.…”

Section: Influence Of Meteorological Storm On E and F Regions Of The supporting

confidence: 58%

“…Based on the theoretical studies [59,61,83] and observational data [7,15,16,30,48] presented above, it is clear that the observed changes in TEC values during meteorological storms were caused by the local heating of the thermosphere due to dissipation of AGWs propagating to the upper atmosphere from the region of meteorological disturbances in the lower atmosphere.…”

Section: Spectral Analysismentioning

confidence: 98%

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Meteorological Storm Influence on the Ionosphere Parameters

Borchevkina

Карпов

2020

Atmosphere

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This paper presents the observations of ionospheric parameters in Kaliningrad (54° N, 20° E) during a meteorological storm in the Baltic Sea during October 2017 and 2018. Analysis of the total electronic content (TEC) during the storm showed that perturbations of the TEC values from the median can reach two standard deviations of the value. For the critical frequency of the F2 layer, it was 1.5–1.6 times the standard deviations. On days of a meteorological storm, significant changes were noted in the dynamics of the E-layer’s critical frequency. The reasons for the occurrence of the observed phenomena were due to the propagation of acoustic-gravity waves generated by convective processes in the lower atmosphere during periods of a meteorological storm. Spectral analysis of TEC variations revealed an increase in the amplitudes of ionospheric variations 10–16 min over the area of a meteorological storm. The analysis allowed us to conclude that ionospheric perturbations during the meteorological perturbation were caused by increased acoustic-gravity wave (AGW) generation processes in the lower atmosphere. The most likely cause of negative ionospheric disturbances were processes associated with the dissipation of AGW propagating from the area of a meteorological storm and increased turbulence in the lower thermosphere.

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Section: Influence Of Meteorological Storm On E and F Regions Of The supporting

confidence: 58%

Section: Spectral Analysismentioning

confidence: 98%

Meteorological Storm Influence on the Ionosphere Parameters

Borchevkina

Карпов

2020

Atmosphere

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“…An accepted theory is now the wind shear theory [Mathews, 1998;Haldoupis, 2012] that attributes the formation of the sporadic E layers in the ionosphere at midlatitudes to ion flows caused by the irregular vertical structure of horizontal winds. Occurrence of the irregular neutral wind may be associated with different dynamic processes in the lower thermosphere [Haldoupis et al, 2006;Pignalberi et al, 2014].…”

Section: Discussionmentioning

confidence: 99%

Impact of Meteorological Storms on the E-Region of the Ionosphere in 2017–2018

Borchevkina

Карпов

et al. 2020

Solar-Terrestrial Physics

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The paper presents the results of observations of the sporadic Es layer during the period of meteorological disturbances in Kaliningrad in October 2017 and 2018 under quiet geomagnetic conditions. During the meteorological storms (October 29–30, 2017 and October 23–24, 2018), significant changes occurred in the dynamics of the Es-layer critical frequency. Observations of atmospheric and ionospheric disturbances in the Kaliningrad region show that the delay between the ionospheric response and the moment of maximum disturbances in atmospheric parameters is about 3 hours. These phenomena at the heights of the E-region might have been caused by propagation of acoustic-gravity waves generated by convective processes in the lower atmosphere during periods of a meteorological storm. Intensification of turbulent processes in the lower thermosphere leads to an increase in the atmospheric density and, accordingly, to higher recombination rates. This leads to a rapid decrease in the concentration of ions and, consequently, to a decrease in the critical frequency of the sporadic layer below the sensitivity threshold of ionosondes.

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“…Theoretical studies of AGW propagation from sources in the lower atmosphere suggest that waves of this range can quickly reach the upper atmosphere and due to dissipation can give rise to large-scale disturbances, specifically to local heating regions. Noticeable large-scale disturbances in the upper atmosphere conditioned by dissipation of AGWs propagating from a source in the lower atmosphere are observed 1-2 hr after activation of the source [17]. A local heating region appearing in the upper atmosphere should affect the ionization balance in the ionosphere and lead to a decrease in the ionospheric electron density due to the growing influence of recombination processes.…”

Section: Discussionmentioning

confidence: 99%

Research of variations of ionospheric parameters during the local meteorological phenomena in the kaliningrad region

et al. 2016

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The paper presents observations of atmospheric and ionospheric parameters during strong meteorological disturbances (storms) in the Kaliningrad region. The analysis of ionospheric observations has shown that during meteorological storms the amplitude of diurnal variations in TEC decreases to 50 %; and in foF2, to 15 % as compared to quiet days. The revealed changes in ionospheric conditions during meteorological storms are regularly registered and represent a characteristic feature of the meteorological effect on the ionosphere. Modeling studies of the vertical propagation of AGW from the Earth's surface showed that such waves quickly (within ~15 min) reach altitudes of the upper atmosphere (~300 km). The refraction and dissipation of waves in the upper atmosphere produces perturbations of the background state of the atmosphere and gives rise to the waveguide propagation of infrasonic wave components. The observed manifestations of TEC disturbances caused by AGW propagating from the lower atmosphere can be explained by the diurnal variation of the altitude of the ionosphere and the waveguide propagation of infrasonic waves.

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Formation of large-scale disturbances in the upper atmosphere caused by acoustic gravity wave sources on the Earth’s surface

Cited by 33 publications

References 10 publications

Meteorological Storm Influence on the Ionosphere Parameters

Meteorological Storm Influence on the Ionosphere Parameters

Impact of Meteorological Storms on the E-Region of the Ionosphere in 2017–2018

Research of variations of ionospheric parameters during the local meteorological phenomena in the kaliningrad region

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