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Skip to Search Results- 73Rankin, Robert
- 17Kabin, Konstantin
- 15Marchand, Richard
- 10Lu, J. Y.
- 9Degeling, Alex W.
- 8Gombosi, Tamas I.
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2008
Kabin, Konstantin, Rankin, Robert, Sydorenko, Dmytro
A two-dimensional nonlinear multi-fluid MHD model of the ionosperic Alfven resonator is presented. The resonator is excited by a packet of shear Alfven waves propagating downward toward the ionosphere from high altitudes. It is shown that the nonlinear (ponderomotive) force of standing...
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2005
Marchand, Richard, Lu, J. Y., Rankin, Robert, Tikhonchuk, Vladimir T.
Ionospheric electron heating by resonant standing shear Alfvén waves in Earth's magnetosphere is investigated. It is demonstrated that in field line resonances (FLRs), electron heating by Alfvén waves produces ionization and large changes in the ionospheric Pedersen conductivity. This leads to a...
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1997
Samson, J. C., Rankin, Robert, Voronkov, I., Tikhonchuk, V. T.
The effect of the ponderomotive force (PF) on the temporal evolution of shear Alfven field line resonances (FLRs) is considered for a magnetic dipole geometry appropriate to the Earth's magnetosphere. We derive a set of equations which describes the coupling of shear Alfven and slow mode waves...
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1994
Tikhonchuk, V. T., Frycz, P., Samson, J. C., Rankin, Robert
We present theory and numerical simulations of strong nonlinear effects in standing shear Alfven waves (SAWs) in the Earth's magnetosphere, which is modeled as a finite size box with straight magnetic lines and (partially) reflecting boundaries. In a low beta plasma it is shown that the...
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1998
Rankin, Robert, Tikhonchuk, V. T.
We describe nonlinear resonance absorption of compressional Alfven waves in a model magnetosphere. It is shown that the ponderomotive force of excited standing shear Alfven waves can lead to nonlinear saturation and spatial structuring of field line resonances and that in low-beta plasmas...
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On the Role of Last Closed Drift Shell Dynamics in Driving Fast Losses and Van Allen Radiation Belt Extinction
Download2018-04-20
Olifer, L., Mann, I. R., Morley, S. K., Ozeke, L. G., Choi, D.
We present observations of very fast radiation belt loss as resolved using high time resolution electron flux data from the constellation of Global Positioning System (GPS) satellites. The time scale of these losses is revealed to be as short as ∼0.5–2 hr during intense magnetic storms, with some...
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Open‐closed field line boundary position: A parametric study using an MHD modelournal of Geophysical Research: Space Physics, 109(A5), [pp
Download2004
Clauer, C. Robert, Rostoker, G., Kabin, Konstantin, Gombosi, Tamas I., DeZeeuw, Darren L., Rankin, Robert, Rae, I. Jonathan, Marchand, Richard, Ridley, Aaron J.
In this paper we investigate the effect of changes in the interplanetary magnetic field ( IMF), solar wind dynamic pressure, and dipole tilt angle on the position of the ionospheric projection of the open-closed field line boundary (OCB) in a magnetohydrodynamic (MHD) model. We carry out a large...
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Open‐closed field line boundary position: A parametric study using an MHD modelournal of Geophysical Research: Space Physics, 109(A5), [pp
Download2004
De Zeeuw, Darren L., Clauer, C. Robert, Kabin, Konstantin, Gombosi, Tamas I., Rostoker, Gordon, Rankin, Robert, Rae, I. Johnathan, Marchand, Richard, Ridley, Aaron J.
In this paper we investigate the effect of changes in the interplanetary magnetic field ( IMF), solar wind dynamic pressure, and dipole tilt angle on the position of the ionospheric projection of the open-closed field line boundary (OCB) in a magnetohydrodynamic (MHD) model. We carry out a large...
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Origin of the interhemispheric potential mismatch of merging cells for interplanetary magnetic field BY‐dominated periods
Download2007
Kabin, Konstantin, Rankin, Robert, Gombosi, Tamas I., Sofko, George J., Ridley, Aaron J., Watanabe, Masakazu, Clauer, C. Robert
When the dawn-to-dusk component of the interplanetary magnetic field (IMF B-Y) is dominant, ionospheric convection exhibits a basic two-cell pattern with significant dawn-dusk and interhemispheric asymmetries. For IMF B-Y > 0 the duskside merging cell potential in the Northern Hemisphere is much...
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1999
Tikhonchuk, Vladimir T., Rankin, Robert, Samson, John C.
Existing theories do not explain large parallel electric fields that are associated with keV electron precipitation in auroral arcs. The MHD electron response results in an electrical conductivity in the low altitude magnetosphere that is two orders of magnitude greater than is required. We...