Quantitative Simulation of a Magnetospheric Substorm. 2. Comparison with Observations,

Harel, M.; Wolf, R. A.; Spiro, R. W.; Reiff, P. H.; Chen, C. K.; Burke, William J.; Rich, F. J.; Smiddy, M.

doi:10.21236/ada087700

Cited by 54 publications

(77 citation statements)

References 11 publications

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“…The RCM-E is a model of magnetospheric plasma drift, electrodynamic coupling with the ionosphere (Harel, 1981;Sazykin et al, 2002Sazykin et al, , 2005, and coupling between the plasma and magnetic field (Lemon, 2003, Lemon et al, 2004. Changes to the hot electron drift paths will alter the trapped electron fluxes, while changes in the cold plasma evolution will alter the rate at which the trapped electron fluxes are converted into precipitating fluxes via pitch angle scattering by chorus and hiss waves.…”

Section: Rcm-e Descriptionmentioning

confidence: 99%

The Magnetosphere‐Ionosphere Electron Precipitation Dynamics and Their Geospace Consequences During the 17 March 2013 Storm

et al. 2019

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During geomagnetic storms and substorms, the magnetosphere and ionosphere are strongly coupled by precipitating magnetospheric electrons from the Earth's plasma sheet and driven by both magnetospheric and ionospheric processes. Magnetospheric wave activity initiates electron precipitation, and the ionosphere and upper atmosphere further facilitate this process by enhancing the value of precipitated energy fluxes via connection of two magnetically conjugate regions and multiple atmospheric reflections. This paper focuses on the resulting electron energy fluxes and affiliated height‐integrated Pedersen and Hall conductances in the auroral regions produced by multiple atmospheric reflections during the 17 March 2013 geomagnetic storm and their effects on the inner magnetospheric electric field and ring current. Our study is based on the magnetically and electrically self‐consistent Rice Convection Model‐Equilibrium of the inner magnetosphere with SuperThermal Electron Transport modified electron energy fluxes that take into account the electron energy interplay between the two magnetically conjugate ionospheres. SuperThermal Electron Transport‐modified energy flux in the Rice Convection Model‐Equilibrium leads to a significant difference in the global conductance pattern, ionospheric electric field formation, Birkeland current structure, ring current energization and its energy content, subauroral polarization drifts intensifications and their spatial locations, interchange instability redistribution, and overall energy interplay on the global scale.

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Section: Rcm-e Descriptionmentioning

confidence: 99%

The Magnetosphere‐Ionosphere Electron Precipitation Dynamics and Their Geospace Consequences During the 17 March 2013 Storm

et al. 2019

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“…This view seems, at first glance, to be in conflict with the main-phase ground-magnetometer observations. However, Crooker and Siscoe (1981), Harel et al (1981b) and Chen et al (1982) argued that it is not. They showed that the observed asymmetry can be explained quantitatively by the idea that the sum of region-1 and region-2 Birkeland currents is downward on the dayside and a net upward on the night side.…”

Section: Developments In Understanding Magnetic Storms and The Ring-cmentioning

confidence: 99%

How the Earth's inner magnetosphere works: An evolving picture

Wolf

Spiro

Sazykin

et al. 2007

Journal of Atmospheric and Solar-Terrestrial Physics

139

126

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“…The local‐time distribution of current intensity for each of the Region 1 and Region 2 currents has also been given by them. However, from their local‐time distributions of the Region 1 and Region 2 currents, the antisunward current system was not derived but strong net upward currents were derived in the postnoon sector [ Harel el al. , 1981].…”

Section: Introductionmentioning

confidence: 99%

Local time distribution of net field‐aligned currents derived from high‐altitude satellite data

Nakano

Iwamoto

2003

J. Geophys. Res.

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[1] In order to explain features of geomagnetic disturbances observed at low and middle latitudes such as the dawn-dusk asymmetry in the north-south component, an antisunward current system has been proposed. The antisunward current system consists of net downward field-aligned currents on the dayside, antisunward auroral electrojet currents, and net upward field-aligned currents on the nightside. However, the net field-aligned currents consisting in this current system have not been established by spacecraft observations yet. In order to discuss whether this antisunward current system actually exists or not and whether this current system actually causes the features of geomagnetic disturbances at low and middle latitudes or not, we statistically investigated the global structure of the geomagnetic disturbances generated by the field-aligned currents in the inner magnetosphere by using the magnetic field data obtained by the DE-1 satellite. On the basis of the results, local time distribution of the net field-aligned currents was estimated. Net downward currents are found in the prenoon sector, and net upward currents are found in the premidnight sector. In the postnoon and the postmidnight sector, net field-aligned currents are rather small on an average. The net downward field-aligned currents in the prenoon would feed some portions of the auroral electrojets, and the portions would flow from the prenoon to the premidnight to connect with the net upward field-aligned currents in the premidnight. These results are consistent with ground geomagnetic observations in the auroral region. In addition, we proposed a possible current system, which consistently explains our results and many other observations. It was also confirmed that the current system can actually cause the features of geomagnetic disturbances on the ground.

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Quantitative Simulation of a Magnetospheric Substorm. 2. Comparison with Observations,

Cited by 54 publications

References 11 publications

The Magnetosphere‐Ionosphere Electron Precipitation Dynamics and Their Geospace Consequences During the 17 March 2013 Storm

The Magnetosphere‐Ionosphere Electron Precipitation Dynamics and Their Geospace Consequences During the 17 March 2013 Storm

How the Earth's inner magnetosphere works: An evolving picture

Local time distribution of net field‐aligned currents derived from high‐altitude satellite data

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