What question did this study set out to answer?

To develop empirical models that describe equatorial disturbance zonal electric fields and evaluate plasma drift perturbations driven by prompt penetration and disturbance dynamo processes during geomagnetic storms.

November 1, 1997Journal of Geophysical Research AtmospheresOpen Access

Empirical models of storm time equatorial zonal electric fields

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To develop empirical models that describe equatorial disturbance zonal electric fields and evaluate plasma drift perturbations driven by prompt penetration and disturbance dynamo processes during geomagnetic storms.
Analyzed extensive F region vertical plasma drift observations from the Jicamarca Radio Observatory alongside auroral electrojet indices.
Constructed empirical models separating short-lived prompt penetration effects from longer-lasting disturbance dynamo electric fields.
Validated high-resolution prompt penetration drift models against the Rice Convection Model and conducted case studies combining disturbance drifts with quiet-time patterns across seasons and solar cycles.
Prompt penetration drifts from the high time-resolution empirical model showed close agreement with the Rice Convection Model for comparable polar cap potential drop variations.
Measured and modeled drift velocities closely aligned when perturbations were dominated by magnetospheric convection changes and disturbance dynamo effects.
Discrepancies emerged due to unmodeled variations in shielding efficiency, high-latitude potential, energy deposition patterns, and potential additional plasmaspheric electric field sources.

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Implication

Observational modeling reveals equatorial electric field perturbations during geomagnetic storms, indicating complex interactions between penetration and dynamo forces.

Cite This Study

Fejer et al. (1997) studied this question.

synapsesocial.com/papers/69dd526c27c48be1bb40cec0 https://doi.org/10.1029/97ja02164

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Implication

Observational modeling reveals equatorial electric field perturbations during geomagnetic storms, indicating complex interactions between penetration and dynamo forces.

Empirical models of storm time equatorial zonal electric fields

Key Points

Discussion

Implication

Cite This Study

Empirical models of storm time equatorial zonal electric fields

Key Points

Discussion

Implication

Cite This Study

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