The plasmasphere and advances in plasmaspheric research

Ganguli, G.; Reynolds, M. A.; Liemohn, Michael W.

doi:10.1016/s1364-6826(00)00117-6

Cited by 30 publications

(24 citation statements)

References 97 publications

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“…An excellent review of the major advances in plasmaspheric research made just before the launch of CLUSTER and IMAGE spacecraft was presented in Ganguli et al (2000).…”

Section: Other Models Of the Plasmaspherementioning

confidence: 99%

Recent Progress in Physics-Based Models of the Plasmasphere

et al. 2009

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We describe recent progress in physics-based models of the plasmasphere using the fluid and the kinetic approaches. Global modeling of the dynamics and influence of the plasmasphere is presented. Results from global plasmasphere simulations are used to understand and quantify (i) the electric potential pattern and evolution during geomagnetic storms, and (ii) the influence of the plasmasphere on the excitation of electromagnetic ion cyclotron (EMIC) waves and precipitation of energetic ions in the inner magnetosphere. The interactions of the plasmasphere with the ionosphere and the other regions of the magnetosphere are pointed out. We show the results of simulations for the formation of the plasmapause and discuss the influence of plasmaspheric wind and of ultra low frequency (ULF) waves for transport of plasmaspheric material. Theoretical models used to describe the electric field and plasma distribution in the plasmasphere are presented. Model predictions are compared to recent CLUSTER and IMAGE observations, but also to results of earlier models and satellite observations.

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“…An excellent review of the major advances in plasmaspheric research made just before the launch of CLUSTER and IMAGE spacecraft was presented in Ganguli et al (2000).…”

Section: Other Models Of the Plasmaspherementioning

confidence: 99%

Recent Progress in Physics-Based Models of the Plasmasphere

et al. 2009

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“…It is populated by cold and dense plasma of ionospheric origin. It has been investigated by satellites and ground-based instruments (see the monograph by Lemaire and Gringauz, 1998, the references cited therein, and the review by Ganguli et al, 2000). Large-scale density structures have been observed close to the outer boundary of the plasmasphere, which is called the "plasmapause" or the "Plasmasphere Boundary Layer", or PLS Carpenter and Lemaire, 2004).…”

Section: Introductionmentioning

confidence: 99%

Analysis of plasmaspheric plumes: CLUSTER and IMAGE observations

et al. 2006

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Abstract. Plasmaspheric plumes have been routinely observed by CLUSTER and IMAGE. The CLUSTER mission provides high time resolution four-point measurements of the plasmasphere near perigee. Total electron density profiles have been derived from the electron plasma frequency identified by the WHISPER sounder supplemented, in-between soundings, by relative variations of the spacecraft potential measured by the electric field instrument EFW; ion velocity is also measured onboard these satellites. The EUV imager onboard the IMAGE spacecraft provides global images of the plasmasphere with a spatial resolution of 0.1 R E every 10 min; such images acquired near apogee from high above the pole show the geometry of plasmaspheric plumes, their evolution and motion. We present coordinated observations of three plume events and compare CLUSTER in-situ data with global images of the plasmasphere obtained by IMAGE. In particular, we study the geometry and the orientation of plasmaspheric plumes by using four-point analysis methods. We compare several aspects of plume motion as determined by different methods: (i) inner and outer plume boundary velocity calculated from time delays of this boundary as observed by the wave experiment WHISPER on the four spacecraft, (ii) drift velocity measured by the electron drift instrument EDI onboard CLUSTER and (iii) global velocity determined from successive EUV images. These different techniques consistently indicate that plasmaspheric plumes rotate Correspondence to: F. Darrouzet (fabien.darrouzet@oma.be) around the Earth, with their foot fully co-rotating, but with their tip rotating slower and moving farther out.

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“…Although numerous advances in plasmaspheric research have been achieved over the past three decades [cf. Lemaire and Gringauz , 1998; Ganguli et al , 2000], our understanding of the plasmasphere configuration and dynamics is still incomplete. The radio plasma imager (RPI) instrument on board the IMAGE satellite has recently made the first instantaneous measurements of plasma density profiles along magnetic field lines [ Reinisch et al , 2001].…”

Section: Introductionmentioning

confidence: 99%

Simulating plasmaspheric field‐aligned density profiles measured with IMAGE/RPI: Effects of plasmasphere refilling and ion heating

Horwitz

Song

et al. 2003

J. Geophys. Res.

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[1] The radio plasma imager (RPI) on board the IMAGE satellite measures electron density profiles along magnetic lines through radio sounding techniques. We simulate three density profiles measured by the RPI on 8 June 2001 using the field line interhemispheric plasma (FLIP) model and compare the modeled density profiles with observed profiles. While careful consideration of depletion of flux tubes followed by refilling over several days allows fair agreement between simulated and measured densities around the equator, the simulated densities in the off-equator regions remain significantly lower than those measured for all simulated flux tubes. It is shown that direct heating of ions in the plasmasphere during the plasmasphere refilling, in addition to heating through Coulomb collisions with hotter plasmaspheric electrons, can improve the agreement in the off-equator regions. The enhanced ion pressure in the high altitude part of magnetic field line due to the ion heating impedes the ionospheric inflow from both hemispheres toward the equator, giving rise to decreased transport of ionospheric ions into the equatorial region and thus increased density gradient along the magnetic field line.

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The plasmasphere and advances in plasmaspheric research

Cited by 30 publications

References 97 publications

Recent Progress in Physics-Based Models of the Plasmasphere

Recent Progress in Physics-Based Models of the Plasmasphere

Analysis of plasmaspheric plumes: CLUSTER and IMAGE observations

Simulating plasmaspheric field‐aligned density profiles measured with IMAGE/RPI: Effects of plasmasphere refilling and ion heating

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