Wind shifts in the Earth’s atmosphere over powerful hurricanes

Пилипенко, С. Г.; Kozak, L.V.

doi:10.15407/knit2012.06.043

“…The AGW impact on sporadic layers in the ionospheric E-region has been studied in numerous experimental and theoretical works [Mathews, 1998;Fukao et al, 1998;Parkinson, Dyson, 1998;Bourdillon et al, 1997;Scotto, 1995;Pilipenko, Kozak, 2012;Snively, Pasko, 2003;Liperovsky et al, 2000], which examined various aspects of the AGW impact, including the impact of waves on the irregularity of horizontal winds in the ionospheric E-region, the disturbance of the critical frequency in the layer, recombination processes in the upper mesospherelower thermosphere.…”

Section: Discussionmentioning

confidence: 99%

“…Specifically, cases have been found in which an E s layer and a disturbance in the F-region exhibited the same periodicity [van Eyken et al, 1982, Mathews, 1998Parkinson, Dyson, 1998]. Various aspects of the AGW impact on E s layers such as the impact of waves on the inhomogeneity of horizontal winds at ionospheric E-layer heights, disturbances of the layer critical frequency, and recombination processes in the upper mesospherelower thermosphere are discussed in [Pilipenko, Kozak, 2012;Barta et al, 2017;Haldoupis, 2012;Šauli, Bourdillon, 2008;Didebulidze et al, 2015].…”

Section: Introductionmentioning

confidence: 99%

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

Borchevkina

¹

,

Карпов

²

,

Карпов

³

et al. 2020

Solar-Terrestrial Physics

0

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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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“…Numerous experimental and theoretical works have been devoted to studying the effect of AGW on sporadic layers in the E-region of the ionosphere [59,63,64,71,[76][77][78][79][80][81]. These studies have considered various aspects of AGW influence, including the effect of waves on the inhomogeneity of horizontal winds at the heights of the E-region of the ionosphere, on the perturbation of the critical frequency of the layer, and on the recombination processes in the upper mesosphere and lower thermosphere.…”

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

confidence: 99%

Meteorological Storm Influence on the Ionosphere Parameters

Borchevkina

¹

,

Карпов

²

,

Карпов

³

2020

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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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Impact of meteorological storms on the E-region of the ionosphere in 2017–2018

Borchevkina

¹

,

Карпов

²

,

Карпов

³

et al. 2020

Solnechno-Zemnaya Fizika

0

View full text Add to dashboard Cite

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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Wind shifts in the Earth’s atmosphere over powerful hurricanes

Cited by 3 publications

References 7 publications

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

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

Meteorological Storm Influence on the Ionosphere Parameters

Impact of meteorological storms on the E-region of the ionosphere in 2017–2018

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