Response of the nighttime midlatitude ionosphere to the passage of an atmospheric gravity wave

Yakovets, A. F.; Vodyannikov, V. V.; Gordienko, G. I.; Ashkaliev, Ya. F.; Litvinov, Yu. G.; Akasov, S. B.

doi:10.1134/s0016793208040129

Cited by 11 publications

(7 citation statements)

References 12 publications

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“…compression of the layer from the top down followed by a recovering expansion of the profile. The stated relationship between these parameters described here is in full agreement with the previous experimental results of Ashkaliev et al [2003], Yakovets et al [2008], and Yakovets et al [2013]. As was pointed out by Ashkaliev et al [2003], these observations are also consistent with the theoretical calculations of TID relationships provided by Millward et al [1993, Figure 6].…”

Section: 1002/2016rs006036supporting

confidence: 93%

“…Despite the long history of TID observation, the generic relationship between f o F 2 and h m (as well as virtual height) discussed in this paper has only occasionally been recognized [e.g., Vlasov et al ., ; Shiokawa et al ., ; Liu et al ., ] and the relationship of these parameters with the subpeak thickness y m , while previously reported [ Ashkaliev et al ., ; Yakovets et al ., , , , ; Pezzopane et al ., ], continues to remain little known in the ionospheric community.…”

Section: Introductionmentioning

confidence: 99%

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The observed compression and expansion of the F₂ ionosphere as a major component of ionospheric variability

2016

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This paper examines a number of sources of ionospheric variability and demonstrates that they have relationships in common which are currently not recognized. The paper initially deals with medium to large‐scale traveling ionospheric disturbances. Following sections deal with nontraveling ionospheric disturbance (TID) ionospheric variations which are often repetitious from day to day. The latter includes the temporary rise in F2 height associated with sunset in equatorial latitudes resulting from strong upward drift in ionization driven by an E × B force. The following fall in height is often referred to as the premidnight collapse and is accompanied by a temporary increase in foF2 as a result of ionospheric compression. An entirely different repetitious phenomenon reported recently from middle latitudes in the Southern Hemisphere consists of strong morning and afternoon peaks in foF2 which define a midday bite‐out and occur at the equinoxes. This behavior has been speculated to be tidal in origin. All the sources of ionospheric variability listed above exhibit similar relationships associated with a temporary expansion and upward lift of the ionospheric profile and a fall involving a compression of the ionospheric profile producing a peak in foF2 at the time of maximum compression. Such ionospheric compression/decompression is followed by a period in which the ionospheric profile recovers. Such relationships in traveling ionospheric disturbances (TIDs) have been noted previously. The present paper establishes for the first time that relationships hitherto seen as occurring only with TIDs are also present in association with other drivers of ionospheric variability.

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Section: 1002/2016rs006036supporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

The observed compression and expansion of the F₂ ionosphere as a major component of ionospheric variability

2016

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“…It is determined using a low‐pass band filter technique that atmospheric GWs are responsible for these in meridional wind velocities. The response of several parameters of the nighttime F layer to the passage of an atmospheric GW produced during the significant magnetic storm on 24–25 July 2004, is investigated using data from the Almaty ionospheric vertical sounding (Yakovets et al., 2008). The phase relationships between fluctuations in the electron density at the maximum of the F2 layer (NmF2), the layer maximum height of the F2 layer (hmF2), and the layer half‐thickness were calculated by the slope of the wave phase front.…”

Section: Introductionmentioning

confidence: 99%

Statistical Study of Global Lightning Activity and Thunderstorm‐Induced Gravity Waves in the Ionosphere Using WWLLN and GNSS‐TEC

et al. 2023

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We present a statistical study of global lightning activity and correlate this activity with ionospheric fluctuations in the Total Electron Content (TEC). Thunderstorms play a significant role in modulating the ionosphere's plasma distribution. Using the well‐known World Wide Lightning Location Network (WWLLN) system, we investigate the diurnal, monthly, and seasonal variations in lightning stroke numbers across six continents. Typically, the monsoon causes a significant increase in lightning occurrences, as reflected in the WWLLN observations. We chose a time frame of July–December 2019, which usually covers the peak and post‐monsoon seasons on all the continents. The diurnal lightning activity is observed to be highest in the early afternoon for all the locations. In addition, we observe hemispherical changes in lightning activity that appear opposite in nature. Using the Global Navigation Satellite System (GNSS)‐International GNSS Service data, we use the Vertical TEC (VTEC) and Rate of change Of TEC Index as proxies for the amplitude scintillation S4 index. Using the wavelet analysis of the small‐scale fluctuations in the VTEC profile, we provide a time series analysis of wave‐like TEC fluctuations alongside lightning stroke count as a proxy for thunderstorm activity. It is found that, in most cases, Traveling Ionospheric Disturbances (TIDs) or a local maximum of small‐scale fluctuation in VTEC (dVTEC) that could be coupled to atmospheric gravity waves are observed during periods of peak thunderstorm activity. Most of the locations show that the spectral power of TIDs and the stroke energy density are highly correlated.

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“…The peculiarity lies in the fact that the LSTIDs in the N m F (t) variations are manifested much weaker than in the N h (t) variations at fixed heights located below the height of the layer maximum. The reasons for this altitudinal dependence of the ionosphere response to AGW passage were considered in [6].…”

Section: Description Of the Equipment And Observation Resultsmentioning

confidence: 99%

Diurnal Dependence of the Frequency of Occurrence of Traveling Ionospheric Disturbances Over Almaty

Yakovets¹,

Jahanshir²,

Gordienko³

et al. 2020

OF THE NATIONAL ACADEMY OFSCIENCES OF THE REPUBLIC OF KAZAKHSTA

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Б а с р е д а к т о р ы ф.-м.ғ.д., проф., ҚР ҰҒА академигі Ғ.М. Мұтанов Р е д а к ц и я а л қ а с ы: Жұмаділдаев А.С. проф., академик (Қазақстан) Кальменов Т.Ш. проф., академик (Қазақстан) Жантаев Ж.Ш. проф., корр.-мүшесі (Қазақстан) Өмірбаев У.У. проф., корр.-мүшесі (Қазақстан) Жүсіпов М.А. проф. (Қазақстан) Жұмабаев Д.С. проф. (Қазақстан) Асанова А.Т. проф. (Қазақстан) Бошкаев К.А. PhD докторы (Қазақстан) Сұраған Д. корр.-мүшесі (Қазақстан) Quevedo Hernando проф. (Мексика), Джунушалиев В.Д. проф. (Қырғыстан) Вишневский И.Н. проф., академик (Украина) Ковалев А.М. проф., академик (Украина) Михалевич А.А. проф., академик (Белорусь) Пашаев А. проф., академик (Әзірбайжан) Такибаев Н.Ж. проф., академик (Қазақстан), бас ред. орынбасары Тигиняну И. проф., академик (Молдова) «ҚР ҰҒА Хабарлары. Физика-математикалық сериясы».

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Response of the nighttime midlatitude ionosphere to the passage of an atmospheric gravity wave

Cited by 11 publications

References 12 publications

The observed compression and expansion of the F₂ ionosphere as a major component of ionospheric variability

The observed compression and expansion of the F₂ ionosphere as a major component of ionospheric variability

Statistical Study of Global Lightning Activity and Thunderstorm‐Induced Gravity Waves in the Ionosphere Using WWLLN and GNSS‐TEC

Diurnal Dependence of the Frequency of Occurrence of Traveling Ionospheric Disturbances Over Almaty

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Response of the nighttime midlatitude ionosphere to the passage of an atmospheric gravity wave

Cited by 11 publications

References 12 publications

The observed compression and expansion of the F2 ionosphere as a major component of ionospheric variability

The observed compression and expansion of the F2 ionosphere as a major component of ionospheric variability

Statistical Study of Global Lightning Activity and Thunderstorm‐Induced Gravity Waves in the Ionosphere Using WWLLN and GNSS‐TEC

Diurnal Dependence of the Frequency of Occurrence of Traveling Ionospheric Disturbances Over Almaty

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The observed compression and expansion of the F₂ ionosphere as a major component of ionospheric variability

The observed compression and expansion of the F₂ ionosphere as a major component of ionospheric variability