Results 1 to 10 of about 202 (116)
The electron density at the midpoint of the plasmapause
Frontiers in Astronomy and Space SciencesThe high density plasmasphere in the magnetosphere is often separated from a lower density region outside of the plasmasphere, called the plasmatrough, by a sharp gradient in electron density called the plasmapause.
Richard E. Denton +6 more
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Geophysical Research Letters, 2021 We present observational support for whistler mode waves guidance by the plasmapause gradients based on a case study and statistical analyses. Due to the combined effects of inhomogeneous magnetic fields and plasma densities, whistler mode waves near the
Rui Chen +4 more
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Prediction of Dynamic Plasmapause Location Using a Neural Network
Space Weather, 2021 As a common boundary layer that distinctly separates the regions of high‐density plasmasphere and low‐density plasmatrough, the plasmapause is essential to comprehend the dynamics and variability of the inner magnetosphere.
Deyu Guo +11 more
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Improving Predictions of the 3D Dynamic Model of the Plasmasphere
Frontiers in Astronomy and Space Sciences, 2021 In this perspective paper, we review and discuss different ways that can be used to improve the predictions of the models of the plasmaspheric region. The density of the background cold plasma and the plasmapause position are very important to determine ...
Viviane Pierrard +3 more
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The Plasmasphere Boundary Layer [PDF]
Annales Geophysicae, 2004 As an inner magnetospheric phenomenon the plasmapause region is of interest for a number of reasons, one being the occurrence there of geophysically important interactions between the plasmas of the hot plasma sheet and of the cool plasmasphere. There
D. L. Carpenter, J. Lemaire, J. Lemaire
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On structuring of the plasmapause [PDF]
Geophysical Research Letters, 2012 Irregularities have been observed on the plasmapause by radio wave techniques and by in situ density, electric field, and magnetic field measurements. We review these data sets and show that Alfvén waves are present and could lead to the observed fluctuations through mixing of the gradient in plasma density at the plasmapause.
M. C. Kelley, J. Franz, A. Jacobson
openaire +1 more source
Frontiers in Astronomy and Space Sciences, 2021 The plasmapause marks the limit of the plasmasphere and is characterized by a sudden change in plasma density. This can influence the other regions of the magnetosphere, including due to different waves circulating inside and outside the plasmasphere. In
V. Pierrard +8 more
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Sawtooth and dune auroras simultaneously driven by waves around the plasmapause
Earth and Planetary Physics, 2023 The dune aurora, at a scale of ~30 kilometers, was reported recently using ground camera. The small-scale dune aurora occurs on the duskside and exhibits a monochromatic oscillation in the auroral emission, implying fundamental energy conversions ...
Fei He +12 more
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Van Allen Probes Observations of Oxygen Ions at the Geospace Plume
Frontiers in Astronomy and Space Sciences, 2021 The geospace plume couples the ionosphere, plasmasphere, and magnetosphere from sub-auroral regions to the magnetopause, on polar field lines, and into the magnetotail.
John C. Foster, Philip J. Erickson
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Modeling of the cold electron plasma density for radiation belt physics
Frontiers in Astronomy and Space Sciences, 2023 This review focusses strictly on existing plasma density models, including ionospheric source models, empirical density models, physics-based and machine-learning density models.
J.-F. Ripoll +12 more
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