Two Component Model of the Schumann Resonance Signal

Yatsevich, E. I.; Nickolaenko, A. P.; Швец, А. В.; Rabinowicz, L. M.

doi:10.1615/telecomradeng.v64.i10.100

Cited by 6 publications

(7 citation statements)

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“…A substantial part of global lightning activity is omitted by OTD and hence is absent in the model simulations. This activity is present as the “background” in the SR records (the characteristics of the background were studied by Yatsevich et al [2005]) and hence the minimum‐maximum difference in the experimental records is significantly smaller then the minimum‐maximum difference in the model simulations that base on OTD data (this was also noted by Hayakawa and Nickolaenko [2005] and Nickolaenko et al [2006]).…”

Section: Simulations With Global Lightning Distributionmentioning

confidence: 87%

Relative importance of the day‐night asymmetry in Schumann resonance amplitude records

Pechony

Price

Nickolaenko³

2007

Radio Science

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[1] Computations of Schumann resonance (SR) field amplitudes from a point source in the uniform and nonuniform cavities are performed to estimate the relative importance of the day-night asymmetry in observed SR amplitudes. Additional simulations with globally distributed sources, representing diurnal and seasonal variations of global lightning activity, are performed in uniform and nonuniform cavities to evaluate the impact of the day-night asymmetry on the diurnal and seasonal amplitude variations. The results show that the effect of diurnal ionosphere changes on the first mode SR amplitudes is $10%. Model results indicate that the source properties (the level of activity and proximity to the observer) play the dominant role in the diurnal variations observed in SR field records, with the day-night asymmetry being secondary in importance.Citation: Pechony, O., C. Price, and A. P. Nickolaenko (2007), Relative importance of the day-night asymmetry in Schumann resonance amplitude records, Radio Sci., 42, RS2S06,

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Section: Simulations With Global Lightning Distributionmentioning

confidence: 87%

Relative importance of the day‐night asymmetry in Schumann resonance amplitude records

Pechony

Price

Nickolaenko³

2007

Radio Science

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“…SR are mainly excited by the cloud‐to‐ground lighting discharges in the atmosphere, and carry information about the global lightning activity in three main thunderstorm regions (Africa, southeast Asia, and South America) and electromagnetic properties of the lower ionosphere. The long‐term SR records collected at several different stations have been reported in many papers [e.g., Sátori et al , 1996; Nickolaenko et al , 1998; Price and Melnikov , 2004; Yatsevich et al , 2006; Sekiguchi et al , 2008]. The clear diurnal and seasonal variations of SR power and frequency were observed.…”

Section: Introductionmentioning

confidence: 99%

Seasonal variations of global lightning activity extracted from Schumann resonances using a genetic algorithm method

2009

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[1] A three-dimensional Finite Difference Time Domain (FDTD) model of the Earthionosphere cavity with a realistic conductivity profile is employed to study the global lightning activity using the observed intensity variations of Schumann resonances (SR). Comparison of the results derived from our FDTD model and the previous studies by other authors on related subjects shows that Schumann resonance is a good probe to indicate the seasonal variations of lightning activity in three main thunderstorm regions (Africa, southeast Asia, and South America). An inverse method based on genetic algorithms is developed to extract information on lightning intensity in these three regions from observed SR intensity data. Seasonal variations of the lightning activity in three thunderstorm centers are clearly observed in our results. Different SR frequency variations associated with seasonal variations of global lighting activity are also discussed.

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“…Two source models are used. The first, the simple model is the compact source [Yatsevich et al, 2006[Yatsevich et al, , 2008: the global thunderstorms occupy a compact area (15°radius) at the equator and move around the globe during the day. The source intensity appropriately varies in time.…”

Section: Appendix Amentioning

confidence: 99%

“…Pronounced seasonal/diurnal variations in Figure 1 occur at a “podium” present in records of all three observatories, i.e., the diurnal curve is elevated over the abscissa and never reaches the zero level. This vertical shift regarded as “podium,” originates from the “inappropriate” thunderstorm activity distributed over the whole globe and causing the depolarized SR signals at an observatory [ Yatsevich et al , 2006, 2008].…”

Section: Separating the Lt And Ut Componentsmentioning

confidence: 99%

Universal and local time variations deduced from simultaneous Schumann resonance records at three widely separated observatories

et al. 2011

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A technique is applied to experimental Schumann resonance intensity that separates the universal (UT) and local time (LT) variations. Two orthogonal horizontal magnetic field components were recorded simultaneously at the observatories of Moshiri, Japan (44.4°N, 142.2°E), Lehta, Russia (64.4°N, 34°E), and West Greenwich, Rhode Island, United States (41.6°N, 71.6°W). We use the cumulative magnetic field power integrated over the first three Schumann resonance modes. Diurnal variations were averaged over a month for the period from August 1999 to December 2001 at each site. These records were combined to obtain estimates for the UT daily patterns of the global thunderstorm activity. Diurnal variations of particular months repeat year after year, indicating that space‐time distributions of global thunderstorms are annually replicated with minor deviations. Another technique, based on geometric averaging of records, was used to obtain alternative estimates of the global thunderstorm intensity. Results acquired with both techniques showed an outstanding similarity.

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Two Component Model of the Schumann Resonance Signal

Cited by 6 publications

References 0 publications

Relative importance of the day‐night asymmetry in Schumann resonance amplitude records

Relative importance of the day‐night asymmetry in Schumann resonance amplitude records

Seasonal variations of global lightning activity extracted from Schumann resonances using a genetic algorithm method

Universal and local time variations deduced from simultaneous Schumann resonance records at three widely separated observatories

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