ULF waves observed in solar wind and on the ground at high, mid, and low latitudes

Alimaganbetov, M.; Streltsov, A. V.

doi:10.1016/j.jastp.2020.105220

Cited by 3 publications

(4 citation statements)

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“…For example, Horvath and Lovell (2021) show the correlation between surface waves on the plasmapause and Kelvin‐Helmholtz waves in the solar wind in the magnetopause region, whereas Kepko and Spence (2003) suggest that the oscillations in the dynamic plasma pressure or the magnetic field carried by the solar wind can serve as a direct driver of the Earth's magnetosphere and produce electromagnetic waves with the frequency ≈1 mHz detected on the ground. Recent studies by Alimaganbetov and Streltsov (2018), 2020 support this hypothesis. These authors analyzed oscillations of the magnetic field detected by the ACE satellite in the solar wind and ground magnetometers at high ( L = 5.76), middle ( L = 2.46), and low ( L = 1.87) latitudes during 84 intense substorms and found a good correlation between oscillations with frequencies less than 1 mHz observed in all these locations.…”

Section: Introductionmentioning

confidence: 84%

“…This fact may explain observations of ULF waves in the solar wind and at middle latitudes on the ground reported by Alimaganbetov and Streltsov (2020). Our goal is to investigate this hypothesis by modeling one of the substorm events reported by Alimaganbetov and Streltsov (2020) with a two-fluid MHD code developed by Streltsov and Foster (2004) for studying electromagnetic coupling between the ionosphere and the magnetosphere in the subauroral zone. In particular, we want to investigate the role of the plasmapause in the generation of the intense ULF waves with frequencies observed during these events at middle latitudes and to provide a detailed quantitative description of the spatial structure and temporal behavior of these waves.…”

Section: Of 15mentioning

confidence: 91%

“…3 of 15 around 0.50-0.65 mHz, showing a good correlation. Figure 1, reproduced from the study by Alimaganbetov and Streltsov (2020), shows magnetic fluctuations recorded by the ACE satellite in the Earth's L1 Lagrangian point and the ground magnetometers at the Poker Flat, Alaska (L = 5.76) and Palmer, Antarctica (L = 2.46) stations during a substorm occurred on 09/28/2016 around 1600 UTC. Figures 1a-11c show the B Y component of the magnetic field in the GSM coordinate system detected by ACE, the B H component in the HDZ coordinate system recorded at Poker Flat, and the B X component in the GSE coordinate system at the Palmer station, respectively.…”

Section: 1029/2021ja029990mentioning

confidence: 95%

“…During substorms the plasmasphere can be severely eroded and the plasmapause moves to L = 2-3 (Goldstein et al, 2003(Goldstein et al, , 2019. This fact may explain observations of ULF waves in the solar wind and at middle latitudes on the ground reported by Alimaganbetov and Streltsov (2020). Our goal is to investigate this hypothesis by modeling one of the substorm events reported by Alimaganbetov and Streltsov (2020) with a two-fluid MHD code developed by Streltsov and Foster (2004) for studying electromagnetic coupling between the ionosphere and the magnetosphere in the subauroral zone.…”

Section: Of 15mentioning

confidence: 97%

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Feedback Interactions Between the Ionosphere and Magnetosphere at Middle Latitude

Alimaganbetov

Streltsov

2022

JGR Space Physics

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Ultra-low frequency (ULF) electromagnetic waves carry significant fluxes of the electromagnetic power, mass, and momentum in the highly coupled solar wind-magnetosphere-ionosphere system. Their role in the global energy exchange increases many times during magnetically active times like the geomagnetic storms and substorms. This is one of the main reasons why these waves and the associated field-aligned currents are extensively studied at high latitudes in connection with the discrete auroral arcs and other non-luminous phenomena.One of the most frequently considered mechanisms responsible for the generation of the large-amplitude ULF waves is the global magnetospheric field-line resonator (FLR) formed by the magnetic field line bounded by the conjugate locations in the ionosphere. Shear Alfvén waves can form a standing pattern between these locations. If there is an external or internal driver that provides power with a frequency matching one of the eigenfrequencies of the system, then the resonator can produce large-amplitude ULF waves. This idea had been proposed in classical papers by Cummings et al. (1969);Southwood (1974) and extensively studied after that, for example, Chen and Hasegawa (1974); Streltsov and Lotko (1995).The existence of the global magnetospheric resonator is strongly supported by the frequent observations obtained with ground magnetometers and radars, particularly, by these electromagnetic oscillations with discrete frequencies of 0.8, 1.3, 1.9, and 3.5 mHz in the night-side auroral zone (Fenrich et al., 1995;Samson, Harrold, et al., 1992). The same frequencies also have been detected in the field-aligned particle fluxes and luminosity of the discrete auroral arcs (Xu et al., 1993). The fact that at high altitudes these frequencies match the eigenfrequencies of the magnetic field lines stretched to the magnetotail (Lui & Cheng, 2001) provides a rationale to interpret them as a manifestation of the global field line resonator (Samson, Wallis, et al., 1992;Walker et al., 1992).FLR can be driven by several physical mechanisms. It can be a reconnection in the magnetotail (Angelopoulos et al., 2002), or the Kelvin-Helmholtz instabilities on the magnetopause or on the flanks of the magnetosphere in the so-called low-latitude boundary layers (Galinsky & Sonnerup, 1994;Marin et al., 2014). It can be energetic electron injections (Pilipenko et al., 2002) or feedback-active ionosphere-magnetosphere interactions driven by the electric field in the ionosphere (

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Section: Introductionmentioning

confidence: 84%

Section: Of 15mentioning

confidence: 91%

Section: 1029/2021ja029990mentioning

confidence: 95%

Section: Of 15mentioning

confidence: 97%

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Feedback Interactions Between the Ionosphere and Magnetosphere at Middle Latitude

Alimaganbetov

Streltsov

2022

JGR Space Physics

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Auroral geospace

Мишин

Streltsov

2022

Nonlinear Wave and Plasma Structures in the Auroral and Subauroral Geospace

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The Impact of Solar Wind Magnetic Field Fluctuations on the Magnetospheric Energetics

Ala‐Lahti,

Pulkkinen,

Brenner

et al. 2024

Geophysical Research Letters

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Solar wind drives magnetospheric dynamics through coupling with the geospace system at the magnetopause. While upstream fluctuations correlate with geomagnetic activity, their impact on the magnetopause energy transfer is an open question. In this study, we examine three‐dimensional global magnetospheric simulations using the Geospace configuration of the Space Weather Modeling Framework. We examine the effects of solar wind fluctuations during a substorm event by running the model with four different driving conditions that vary in fluctuation frequency spectrum. We demonstrate that upstream fluctuations intensify the energy exchange at the magnetopause increasing both energy flux into and out of the system. The increased energy input is reflected in ground magnetic indices. Moreover, the fluctuations impact the magnetopause dynamics by regulating the energy exchange between the polar caps and lobes and energy transport within the magnetotail neutral sheet.

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ULF waves observed in solar wind and on the ground at high, mid, and low latitudes

Cited by 3 publications

References 35 publications

Feedback Interactions Between the Ionosphere and Magnetosphere at Middle Latitude

Feedback Interactions Between the Ionosphere and Magnetosphere at Middle Latitude

Auroral geospace

The Impact of Solar Wind Magnetic Field Fluctuations on the Magnetospheric Energetics

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