Theory for the formation of resonance structure in the spectrum of atmospheric electromagnetic background noise in the range of short-period geomagnetic pulsations

Belyaev, P. P.; Polyakov, S. V.; Rapoport, V. O.; Trakhtengerts, V. Yu.

doi:10.1007/bf01058124

Cited by 62 publications

(69 citation statements)

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“…From that time IAR was studied by many authors both in theoretical [16,8,12] and experimental means [2,7,19]. The analysis of IAR morphology and its relationships with ionospheric parameters were investigated in [5]. Authors of [3] studied IAR parameters during the solar cycle and have found the inverse dependence between IAR observability and solar activity.…”

Section: Such a Phenomenon Is Named Ionospheric Alfvén Resonator (Iarmentioning

confidence: 99%

Multipoint observations of Ionospheric Alfvén Resonance

Baru

Koloskov

Yampolsky

et al. 2016

Adv.Astron.Spa.Physics

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Section: Such a Phenomenon Is Named Ionospheric Alfvén Resonator (Iarmentioning

confidence: 99%

Multipoint observations of Ionospheric Alfvén Resonance

Baru

Koloskov

Yampolsky

et al. 2016

Adv.Astron.Spa.Physics

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“…The starting point is, therefore, the classic VLF theory by Wait (1965), of electromagnetic wave propagation in the Earth-ionosphere waveguide. Due to the very low frequencies in the ULF case, the formalism can be considerably simplified by means of using the quasi-static approach of Belyaev et al (1989). The two orthogonal horizontal wave-field magnetic components emitted from a single vertical electric dipole (lightning flash) represent the two normal modes, the TM-mode (transversal component, perpendicular to the wave k-vector; hereafter referred to as B φ ) and the TE mode (longitudinal component, parallel to the k-vector; hereafter referred to as B r ).…”

Section: Theory and Numerical Approachmentioning

confidence: 99%

“…Since the pioneering works by Polyakov (1976), Polyakov and Rapoport (1981) and Belyaev et al (1987) the discovCorrespondence to: T. Bösinger (tilmann.bosinger@oulu.fi) ery of the ionospheric Alfvén resonator (IAR) led to a manifold of investigations including direct and indirect manifestations of IAR and its role in the atmospheric, ionospheric and magnetospheric context. The basic physics behind the IAR phenomenon, which is well known, is summarized by (Demekhov et al, 2000) and thus will not be repeated here.…”

Section: Introductionmentioning

confidence: 99%

Magnetic-inclination effects in the spectral resonance structure of the ionospheric Alfvén resonator

et al. 2009

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Abstract. Based on recent developments in the formalism governing the spectral resonance structures (SRS) of the Ionospheric Alfvén resonator (IAR) as observed on the Earth's surface, a numerical code was developed to investigate properties of SRS which can in particular be contributed to magnetic inclination effects. Among the theoretical findings are: 1) SRS is discernible in both orthogonal components, 2) the harmonic structure of SRS is not anymore over frequency equidistantly distributed, 3) the frequency scales of SRS differ in the two normal modes. The theoretically predicted properties could be found in the observations of a low latitude and some of them even in the data of a mid latitude station. The verification, however, is not as straight forward because the predicted effects do not only depend on magnetic inclination but also on the wave angle of the lightning induced electromagnetic wave k-vector with the normal to the magnetic meridian passing through the observation site. So far the formalism is simplified as it deals with a single source situation alone whereas the actual observation is a composite of excitations caused by an average of about 60 flashes of lightning operating all the time, world-wide.

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“…One of the achievements in the last century magnetospheric physics was the theoretical prediction (Polyakov & Rapoport 1981), and then the experimental detection (Belyaev et al 1987) of resonance structures in the 0.2-10 Hz band. Dynamic spectra of the oscillations look like a series of fan-shaped bands (Fig.…”

Section: Introductionmentioning

confidence: 99%

Use of the International Reference Ionosphere 2012 model to calculate emission frequency scale of the ionospheric Alfvén resonator

Potapov

Polyushkina

Dovbnya

2015

J. Space Weather Space Clim.

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We apply the IRI-2012 version of the International Reference Ionosphere model to calculate the difference between frequencies of adjacent harmonics (frequency scale) of the ionospheric Alfvén resonator (IAR) emission. The calculated values are compared with the frequency scale data obtained from search-coil magnetometer measurements. To obtain satisfactory results, it appeared necessary to modify the IRI-2012 model by replacing the vertical profile of ionospheric parameters adopted in the standard model with the profile elongated along the magnetic field lines. Subsequent improvement was obtained through the model correction by using local f 0 F 2 measurements. Finally, our results showed strong correlation between estimated and measured values of frequency scale with the root-mean-square error of 0.14 Hz, or 15%.

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Theory for the formation of resonance structure in the spectrum of atmospheric electromagnetic background noise in the range of short-period geomagnetic pulsations

Cited by 62 publications

References 1 publication

Multipoint observations of Ionospheric Alfvén Resonance

Multipoint observations of Ionospheric Alfvén Resonance

Magnetic-inclination effects in the spectral resonance structure of the ionospheric Alfvén resonator

Use of the International Reference Ionosphere 2012 model to calculate emission frequency scale of the ionospheric Alfvén resonator

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