Numerical simulation of LEP Trimpis observed at Poitiers, France, on signals from VLF transmitters

Poussard, Anne-Marie; Corcuff, Y.

doi:10.1016/s1364-6826(00)00005-5

Cited by 6 publications

(5 citation statements)

References 40 publications

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“…Published Trimpi rates over Europe are scarce. Poussard and Corcuff [2000] observed maximum rates of 1 Trimpi min −1 on paths west of Europe that are influenced by less active lightning regions than discussed here. The likeyhood is that the maximum rates are somewhere between 1 and 5 Trimpi min −1 .…”

Section: Modification Of Effective Radio Wave Reflection Heightsmentioning

confidence: 39%

D region reflection height modification by whistler‐induced electron precipitation

Rodger

2002

J.‐Geophys.‐Res.

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[1] We examine the electron density profile expected in the lower ionosphere due to a 0.2-s whistler-induced electron precipitation (WEP) burst with experimentally determined properties. The ionization rate in the lower ionosphere due to a single such WEP event has a height variation with a rather broad maximum, leading to additional electron densities of $5 electrons cm À3 stretching over altitudes of $75-92 km. For ambient nighttime conditions a single WEP burst with these parameters will lead to a significant electron density changes only for altitudes below $85 km. We go on to consider the cumulative response of the nighttime D region to a sustained series of WEP bursts observed through Trimpi perturbation activity on one night in the Antarctic. For altitudes >70 km, significant long-term changes in electron densities due to WEP bursts can occur. The additional WEP-produced ionization leads to increases in the high-altitude electron densities, until a new equilibrium level is reached. Peak changes in electron density are $16 times ambient at 85 km and $7 times ambient at 90 km, occurring in the $15-min period during which the WEP rate is at its peak ($4.5 per min). The simulation suggests that electron density levels ''settle'' into an new quasi-equilibrium state during the $3-hour period where the ionization at 85-km altitude is 10-12 times ambient due to WEP bursts occur at $3 min À1 . The ionization changes produced by WEP bursts lead to lower reflection heights for VLF and LF radio waves (in the Earth-ionosphere waveguide). While significant short-term changes in reflection heights are likely, realistic long-term changes in WEP occurrence rates do not appear likely to be able to explain the reported $2 km decrease in LF reflection heights observed during the last 35 years.

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Section: Modification Of Effective Radio Wave Reflection Heightsmentioning

confidence: 39%

D region reflection height modification by whistler‐induced electron precipitation

Rodger

2002

J.‐Geophys.‐Res.

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“…2-D great circle cut propagation models (Berenger 1994a(Berenger , 2002a(Berenger , b, 2005Thevenot et al 1999) Ionosphere anisotropy (Thevenot et al 1999); surfaceimpedance ground boundary (Berenger 1994a); isotropic geomagnetic field (Thevenot et al 1999); gyrotropic (anisotropic) ionosphere (Berenger 2002a); numerical dispersion compensation (Berenger 2002a); moving computational spatial domain (Thevenot et al 1999); numerical anisotropy removal (Berenger 2005) Long-distance propagation modeling (Berenger 1994a(Berenger , 2002a(Berenger , b, 2005Thevenot et al 1999); nuclear burst (Berenger 2002b) 2-D azimuthally symmetric models of the local Earth-ionosphere waveguide surrounding a source (Cummer 2000, Hu and Cummer 2006, Hu et al 2007, Yang and Zhou 2004, Poussard and Corcuff 2000, Kuo et al 2007 Cold plasma ionosphere (Cummer 1997 and references therein); Magnetized cold plasma ionosphere (Hu and Cummer 2006); Nearly perfectly matched layer boundary conditions for the plasma ionosphere (Cummer 2003); Earth curvature correction (Hu and Cummer 2006); surface-impedance ground boundary (Hu and Cummer 2006); coupling with an electron density continuity equation (Kuo et al 2007) Propagation from lightning (Cummer 2000;Hu and Cummer 2006;Yang and Zhou 2004); Trimpi (whistlers, sprites, elves); (Hu et al 2007;Poussard and Corcuff 2000;…”

Section: Long-range 2-d Propagation Modelingmentioning

confidence: 99%

“…In (Poussard and Corcuff 2000), the first class of Trimpis is studied using the FDTD method. A 2-D FDTD model based on Berenger's initial propagation code (Berenger 1994a) is employed.…”

Section: -D Modeling Of Lightning Sources and Radiationmentioning

confidence: 99%

“…A 2-D FDTD model based on Berenger's initial propagation code (Berenger 1994a) is employed. However, the model of (Poussard and Corcuff 2000) includes all six field components and no phase information. As a result, Poussard and Corcuff propose a hybrid system involving both FDTD and mode theory to study propagation below 10 kHz, and predict the location, longitudinal extent, and height of disturbed regions associated with the Trimpi events.…”

Section: -D Modeling Of Lightning Sources and Radiationmentioning

confidence: 99%

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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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“…Poussard and Corcuff [24] have studied the first class of TRIMPIS using the FDTD method. They employ 2-D FDTD models based on Berenger's initial propagation code [11].…”

Section: Lightning Sources and Radiationmentioning

confidence: 99%

A Review of Progress in FDTD Maxwell's Equations Modeling of Impulsive Subionospheric Propagation Below 300 kHz

Simpson

Taflove

2007

IEEE Trans. Antennas Propagat.

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Abstract-Wave propagation at the bottom of the electromagnetic spectrum (below 300 kHz) in the Earth-ionosphere waveguide system has been an interesting and important area of investigation for the last four decades. Such wave propagation is characterized by complex phenomena involving nonhomogeneous and anisotropic media, and can result in resonances of the entire Earth-ionosphere cavity. In the spirit of this Special Issue, the goal of this paper is to call attention to emerging finite-difference time-domain computational solutions of Maxwell's equations for wave propagation below 300 kHz which promise to complement and extend pre-

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Numerical simulation of LEP Trimpis observed at Poitiers, France, on signals from VLF transmitters

Cited by 6 publications

References 40 publications

D region reflection height modification by whistler‐induced electron precipitation

D region reflection height modification by whistler‐induced electron precipitation

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

A Review of Progress in FDTD Maxwell's Equations Modeling of Impulsive Subionospheric Propagation Below 300 kHz

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