Ionospheric Semidiurnal Lunitidal Perturbations During the 2021 Sudden Stratospheric Warming Event: Latitudinal and Inter‐Hemispheric Variations in the American, Asian‐Australian, and African‐European Sectors

Liu, Jing; Zhang, Donghe; Sun, Shuo; Hao, Yongqiang; Xiao, Zuo

doi:10.1029/2022ja030313

Cited by 4 publications

(12 citation statements)

References 52 publications

(140 reference statements)

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“…As shown in Figure 11, the 14.5‐day oscillation in the IGS TEC peaks in EIA crest regions, consistent with the latitudinal variability of the lunar tide revealed by Pedatella and Forbes (2010a, 2010b) and Liu et al. (2021, 2022). This latitudinal structure has been attributed to the ionospheric fountain effect.…”

Section: Discussion and Summarysupporting

confidence: 82%

“…Phase‐shifted semidiurnal perturbations in TEC during 2009 and 2021 SSW events have also been revealed by Liu et al. (2021, 2022). In addition, the wavenumber‐period spectra of the IGS TEC exhibited an obvious periodic signal centered at 14.5 days with zonal wavenumber 0.…”

Section: Discussion and Summarysupporting

confidence: 62%

“…During SSW events, the IGS TEC exhibits phase-shifted semidiurnal perturbations that correlate well with the moon phase. Phase-shifted semidiurnal perturbations in TEC during 2009 and 2021 SSW events have also been revealed by Liu et al (2021Liu et al ( , 2022. In addition, the wavenumber-period spectra of the IGS TEC exhibited an obvious periodic signal centered at 14.5 days with zonal wavenumber 0.…”

Section: Discussion and Summarymentioning

confidence: 75%

“…Liu et al. (2021, 2022) investigated ionospheric lunitidal signatures during 2009 and 2021 SSW events and found the lunitidal perturbations enhanced during the SSW event, with the strongest M2 perturbations in the northern and southern hemispheres at about 10°–15°N and 25°–30°S geomagnetic latitudes, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…They also revealed the maximum amplitudes in the semidiurnal lunar tide occur during northern hemisphere winter and during 9-15 solar local time. Liu et al (2021Liu et al ( , 2022 investigated ionospheric lunitidal signatures during 2009 and 2021 SSW events and found the lunitidal perturbations enhanced during the SSW event, with the strongest M2 perturbations in the northern and southern hemispheres at about 10°-15°N and 25°-30°S geomagnetic latitudes, respectively.…”

mentioning

confidence: 99%

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Longitudinal, Latitudinal, and Local Time Variations of the 14.5‐Day Periodic Oscillation in the Ionosphere During 2014–2015 SSW

Tang

Zhou

et al. 2023

JGR Space Physics

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Based on global total electron content (TEC) maps from the International Global Navigation Satellite Systems Service (IGS), the ionospheric perturbations during the 2014–2015 sudden stratospheric warming (SSW) event were investigated. The analyses revealed both phase‐shifted semidiurnal perturbations and 14.5‐day periodic signal with zonal wavenumber 0 in the IGS TEC, indicating an enhanced lunar tidal impact on the ionosphere during the 2014–2015 SSW period. The 14.5‐day periodic oscillation in the IGS TEC presents an obvious latitudinal variation, with the maximum appearing in Equatorial Ionization Anomaly crest regions, which is due to the modulation of the equatorial ionospheric fountain effect by wind perturbations modulated by the lunar tide. Additionally, the 14.5‐day periodic oscillation presents a longitudinal pattern with three peaks in the northern hemisphere and four peaks in the southern hemisphere. Local time dependence of the 14.5‐day periodic perturbation is also significant.

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Section: Discussion and Summarysupporting

confidence: 82%

Section: Discussion and Summarysupporting

confidence: 62%

Section: Discussion and Summarymentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Longitudinal, Latitudinal, and Local Time Variations of the 14.5‐Day Periodic Oscillation in the Ionosphere During 2014–2015 SSW

Tang

Zhou

et al. 2023

JGR Space Physics

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Direct Observational Evidence of Altered Mesosphere Lower Thermosphere Mean Circulation From a Major Sudden Stratospheric Warming

Gasperini¹,

Jones

Harding

et al. 2023

Geophysical Research Letters

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Stratospheric sudden warmings (SSWs) are global-scale meteorological events driven by the dissipation of vertically propagating planetary waves originating in the troposphere (Butler et al., 2015;Matsuno, 1971). SSW events are characterized based on the changes that occur in the stratosphere, including a rapid increase in polar temperatures and deceleration of the zonal mean zonal winds. A SSW is classified as a major SSW if the zonal mean zonal winds at 60°N and 10 hPa reverse from eastward to westward (e.g., Charlton & Polvani, 2007). SSWs lead to significant disturbances in the whole atmosphere (Stening, 1977), producing remarkable changes in composition, dynamics, and electrodynamics of the whole ionosphere-thermosphere (IT) system, pole-to-pole, as demonstrated by a number of modeling and observational studies (e.g.,

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The Latitudinal and Longitudinal Variation of the Semidiurnal Lunar Tide in the Ionosphere During 2013

Mo,

Xu,

Zhang

2024

JGR Space Physics

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The present paper studies the latitudinal and longitudinal variation of ionospheric semidiurnal lunar tide (M2) perturbations in 2013 with total electron content (TEC) data. Results show that the latitudinal distribution of M2 exhibits longitudinal difference. At 100 ∼ 120°E and 80 ∼ 100°W longitudes, the strongest M2 perturbations in the northern and southern hemispheres roundly appeared at about 10° ∼ 20°N and 15° ∼ 25°S magnetic latitude (MLAT), respectively, which supports previous suggestion that the M2 maximized in the EIA crest regions. Moreover, the latitude range of M2 at 80 ∼ 100°W longitudes was wider than that at 100 ∼ 120°E longitudes, especially for southern hemisphere (SH). The M2 maximized at 20° ∼ 30°N MLAT in the northern hemisphere (NH) and was absent in the SH at 50°W ∼ 20°E longitudes, which was distinctly different than those at other longitudes. This abnormal behavior of latitudinal distribution of M2 may be caused by the large magnetic declination angle at 50°W ∼ 20°E longitudes. Meanwhile, the longitudinal variation and hemispheric asymmetry of M2 amplitude are different between NH winter (SSW period) and other seasons. The M2 amplitudes were stronger disturbances in the NH and in the American longitudinal sector in NH winter. However, in other seasons, the M2 amplitude was largest in Asian sector, and the M2 amplitude in NH was larger than SH at 0° ∼ 130°E longitudes, which was contrast to these at 0° ∼ 110°W longitudes. These differences of M2 variation between NH winter and other seasons may be related to the differences of the combined effects of the geomagnetic configuration and background conditions of the atmosphere and ionosphere.

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Ionospheric Semidiurnal Lunitidal Perturbations During the 2021 Sudden Stratospheric Warming Event: Latitudinal and Inter‐Hemispheric Variations in the American, Asian‐Australian, and African‐European Sectors

Cited by 4 publications

References 52 publications

Longitudinal, Latitudinal, and Local Time Variations of the 14.5‐Day Periodic Oscillation in the Ionosphere During 2014–2015 SSW

Longitudinal, Latitudinal, and Local Time Variations of the 14.5‐Day Periodic Oscillation in the Ionosphere During 2014–2015 SSW

Direct Observational Evidence of Altered Mesosphere Lower Thermosphere Mean Circulation From a Major Sudden Stratospheric Warming

The Latitudinal and Longitudinal Variation of the Semidiurnal Lunar Tide in the Ionosphere During 2013

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