Power variations of Schumann resonances related to El Niño and La Niña phenomena

Yang, Heng; Pasko, Victor P.

doi:10.1029/2007gl030092

Cited by 19 publications

(18 citation statements)

References 21 publications

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“…Roldugin et al [2004] measured SR parameters in the Kola and Kamchatka peninsulas during 7 days in March-April 2001. These changes in SR frequencies are similar to those obtained from numerical models [Yang and Pasko, 2007;Navarro et al, 2008]. De et al [2010] reported an increase in SR frequencies during the X-ray burst previous to the SPE of 14 July 2000, whereas a decrease in frequencies was observed during the SPE.…”

Section: 1002/2016ja023253supporting

confidence: 84%

Solar storm effects during Saint Patrick's Days in 2013 and 2015 on the Schumann resonances measured by the ELF station at Sierra Nevada (Spain)

et al. 2016

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The effects of solar storms occurring during the days 17 to 19 March 2013 and 2015, St. Patrick's Day intervals, on Schumann resonances (SRs) have been studied. To do this, the experimental data recorded by the Juan Antonio Morente extremely low frequency station located at Sierra Nevada, Spain, have been processed in order to obtain hourly averaged information on the first three resonance modes. Results are compared with monthly averages of the SR data for each hour to detect deviations from the regular behavior. Evidence of significant changes in the peak amplitudes and frequencies of the SRs have been identified in the station's measurements and related to the coronal mass ejection impact in the magnetosphere, detected by in situ plasma measurements onboard spacecraft in the solar wind. However, the complicated nature of the Schumann resonances, dependent on multiple variables and subject to multiple unavoidable interferences (e.g., lightning or human radio sources), in conjunction with the complex magnetosphere‐ionosphere‐atmosphere coupling processes, makes it difficult to conclude that the observed deviations are exclusively due to the solar events mentioned. Results extracted from only two solar events cannot be considered as conclusive, and therefore, independent comparison with results reported by other research would seem advisable in future works on this subject.

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Section: 1002/2016ja023253supporting

confidence: 84%

Solar storm effects during Saint Patrick's Days in 2013 and 2015 on the Schumann resonances measured by the ELF station at Sierra Nevada (Spain)

et al. 2016

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“…The frequency and intensity variations of the first SR modes averaged each month for the period January 1994–November 1998, (this period included the ENSO time scale), were compatible with a small meridional shift of the African thunderstorm region and worldwide thunderstorm activity [ Sátori and Zieger , 1999]. The ENSO was related to the SR in the numerical model of Yang and Pasko [2007] where the simulation of the shift in the thunderstorm activity explained the SR variations.…”

Section: Introductionmentioning

confidence: 94%

Numerical analysis of ionosphere disturbances and Schumann mode splitting in the Earth‐ionosphere cavity

et al. 2008

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[1] The variability of ionosphere properties plays an important role in the Schumann resonances (SR), amplitudes, frequencies, and Q factor. Therefore, as atmosphere ionization is related to solar activity, SR could be devised as a source of indirect parameters that locally from the surface of the Earth could provide space weather information. A proper understanding of this link to SR parameters can be obtained through finite difference time domain (FDTD) simulations, specifically with the numerically obtained modes and frequencies that relate frequency shifts to the day-night asymmetry and polar inhomogeneities. Day-Night asymmetry is observed to have a minor influence in SR; however, large changes are deduced from polar nonuniformities associated to Solar Proton Events (SPE) and X-ray bursts. The field volume distribution of the modes provides the understanding of the SR variability, related to the altitude and latitude of the ionization phenomenon.

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“…In (Yang and Pasko 2007), the authors expand the work of to account for El Nino and La Nina phenomena (the positions of the simulated major lightning storm locations are shifted southward and northward, respectively). They clearly observe different power variation patterns in the electrical and magnetic components, and their results agree qualitatively with the experimental measurements of (Satori and Zieger 1999).…”

Section: Schumann Resonancesmentioning

confidence: 99%

Current and Future Applications of 3-D Global Earth-Ionosphere Models Based on the Full-Vector Maxwell’s Equations FDTD Method

Simpson

2009

Surv Geophys

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Advances in computing technologies in recent decades have provided a means of generating and performing highly sophisticated computational simulations of electromagnetic phenomena. In particular, just after the turn of the twenty-first century, improvements to computing infrastructures provided for the first time the opportunity to conduct advanced, high-resolution three-dimensional full-vector Maxwell's equations investigations of electromagnetic propagation throughout the global Earth-ionosphere spherical volume. These models, based on the finite-difference time-domain (FDTD) method, are capable of including such details as the Earth's topography and bathymetry, as well as arbitrary horizontal/vertical geometrical and electrical inhomogeneities and anisotropies of the ionosphere, lithosphere, and oceans. Studies at this level of detail simply are not achievable using analytical methods. The goal of this paper is to provide an historical overview and future prospectus of global FDTD computational research for both natural and man-made electromagnetic phenomena around the world. Current and future applications of global FDTD models relating to lightning sources and radiation, Schumann resonances, hypothesized earthquake precursors, remote sensing, and space weather are discussed.

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Power variations of Schumann resonances related to El Niño and La Niña phenomena

Cited by 19 publications

References 21 publications

Solar storm effects during Saint Patrick's Days in 2013 and 2015 on the Schumann resonances measured by the ELF station at Sierra Nevada (Spain)

Solar storm effects during Saint Patrick's Days in 2013 and 2015 on the Schumann resonances measured by the ELF station at Sierra Nevada (Spain)

Numerical analysis of ionosphere disturbances and Schumann mode splitting in the Earth‐ionosphere cavity

Current and Future Applications of 3-D Global Earth-Ionosphere Models Based on the Full-Vector Maxwell’s Equations FDTD Method

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