Magnetospheric Current Systems, Volume 118ISBN: 9780875909769
401 pages
January 2000, American Geophysical Union

The magnetosphere is an open system that interacts with the solar wind. In this system, solar wind energy continuously permeates different regions of the magnetosphere through electromagnetic processes, which we can well describe in terms of current systems. In fact, our ability to use various methods to study magnetospheric current systems has recently prompted significant progress in our understanding of the phenomenon. Unprecedented coverage of satellite and ground ]based observations has advanced global approaches to magnetospheric current systems, whereas advanced measurements of electromagnetic fields and particles have brought new insights about micro ]processes. Increased computer capabilities have enabled us to simulate the dynamics not only of the terrestrial magnetosphere but also the magnetospheres of other planets. Based on such developments, the present volume revisits outstanding issues about magnetospheric current systems.
Laurence J. Zanetti ix
Preface
Shinichi Ohtani, Ryoichi Fujii, Michael Hesse, and Robert L. Lysak xi
Frameworks for Describing Current Systems
TUTORIAL: Newton, Maxwell, and Magnetospheric Physics
E. N. Parker 1
Paradigm Transitionin Cosmic Plasma Physics, Magnetic Reconnection and the Generation of
FieldAligned Current
Yan Song and Robert L. Lysak 11
FAST Observations of Electromagnetic Stresses Applied to the Polar Ionosphere
R. J. Strangeway, R. C. Elphic, W. J. Peria, and C. W. Carlson 21
Electric Current Approach to Magnetospheric Physics and the Distinction Between Current
Disruption and Magnetic Reconnection
A. T. Y. Lui 31
Modeling Magnetospheric Current Systems
Global Geometry of Magnetospheric Currents Inferred From MHD Simulations
G. L. Siscoe, N. U. Crooker, G. M. Erickson, B. U. O. Sonnerup, K. D. Siebert, D. R. Weimer,
W. W. White, and N. C. Maynard 41
FieldAlignedCurrent Systems in the Numerically Simulated Magnetosphere
T. Tanaka 53
Recent Progress in the DataBased Modeling of Magnetospheric Currents
N. A. Tsyganenko 61
Field Line Mapping and Birkeland Currents
F. R. Toffoletto and T. W. Hill 71
Magnetotail Currents During the Growth Phase and Local Auroral Breakup
T. I. Pulkkinen, M. V. Kubyshkina, D. N. Baker, L. L. Cogger, S. Kokubun, T. Mukai, H. J. Singer,
J. A. Slavin, and L. Zelenyi 81
MagnetosphereIonosphere Coupling
TUTORIAL: MagnetosphereIonosphere Interactions: A Tutorial Review
S. W. H. Cowley 91
TUTORIAL: FieldAligned Currents in Geospace: Substance and Significance
Takesi lijima 107
TUTORIAL: Ionospheric Electrodynamics: A Tutorial
A. D. Richmond and J. P Thayer 131
The Role of Alfven Waves in the Formation of Auroral Parallel Electric Fields
Robert L. Lysak and Yan Song 147
A ThreeDimensional Simulation of the KelvinHelmholtz Instability
Kristi A. Keller, Robert L. Lysak, and Yan Song 157
The Role of SpaceTime Dependent Ionospheric Conductivity in the Evolution of
Field Line Resonances: Relation to Auroral Arc
Manju Prakash and Robert Rankin 165
FAST O bservations of Upward A ccelerated E lectron Beams and the Downward FieldAligned
Current Region
R. C. Elphic, J. Bonnell, R .J . Strangeway, C. W. Carlson, M. Temerin, J.P. McFadden, R. E. Ergun, and W. Peria 173
Characteristics of FieldAligned Currents Near the Auroral Acceleration RegionFAST Observations
W. J. Peria, C. W. Carlson, R. E. Ergun, J. P. McFadden, J. Bonnell, R. C. Elphic, and R. J. Strangeway 181
Auroral Surge Currents and Electrodynamics With FAST and VIS
S. A. Cummer, R. R. Vondrak, R. F. Pfaff, J. W. Gjerloev, C. W. Carlson, R. E. Ergun, W. J. Peria,
R. C. Elphic, R. J . Strangeway, J. B. Sigwarth, and L. A. Frank 191
A Synthetic View of the MagnetosphericIonospheric Current System Associated With Substorms
Gang Lu 199
The Harang Discontinuity in Auroral Substorms
J. W. Gjerloev, E. FriisChristensen, R. A. Hoffman, and S. A. Cummer 209
The Effect of the January 10, 1997, Pressure Pulse on the MagnetosphereIonosphere
Current System
E. Zesta, H. J. Singer, D. Lummerzheim, C. T. Russell, L. R. Lyons, and M. J. Brittnacher 217
Ionospheric Shear Flow Situations Observed by the MIRACLE Network, and the
Concept of Harang Discontinuity
0. Amm, P. Janhunen, H. J. Opgenoorth, T. I. Pulkkinen, and A. Viljanen 227
Statistical Characteristics of FieldAligned Currents in the Earth's Inner Magnetosphere
Francis K. Chun and Christopher T. Russell 237
Independencoy of the Dayside FieldAligned Current System: A Restriction to Cusp Models
M. Yamauchi, R. Lundin, L . Eliasson, S. Ohtani, P A. Lindqvist, and R. P. Lepping 245
Disappearance of LargeScale FieldAligned Current Systems: Implications for the
Solar WindMagnetosphere Coupling
S. Ohtani, T. Higuchi, T. Sotirelis, and P.T . Newell 253
StormTime Energetic Particle Penetration Into the Inner Magnetospheres and the Electromotive Force
in the Subauroral Ion Drift Current Circuit
J. De Keyser 261
Magnetospheric Electrodynamics
Structured Currents Associated With Tail Bursty Flows During Turbulent Plasma Sheet Conditions
L. R. Lyons, T. Nagai, J. C. Samson, E. Zesta, T. Yamamoto, T. Mukai, A. Nishida, and S. Kokubun 267
Substorm Associated Tail Current Changes Inferred From Lobe Magnetic Field Observations
Christian Jacquey 275
The Current Disruption Myth
Joachim Birn and Michael Hesse 285
Near and Midtail Current Flow During Substorms: Smalland LargeScale Aspects of Current Disruption
Michael Hesse and Joachim Birn 295
Intrinsic Variability in the QuietTime Magnetotail
Vahe Peroomian, Maha AshourAbdalla, and Lev M . Zelenyi 305
SelfConsistent Model of 1D Current Sheet: The Role of Drift, Magnetization and Diamagnetic Currents
Helmi V. Malova, Mikhail I. Sitnov, Lev M. Zelenyi, and Surja Sharma 313
Pressure Anisotropy and By in the Magnetotail Current Sheet
Richard L. Kaufmann, Bryan M. Ball, W. R. Paterson, and L. A. Frank 323
Formation of the StormTime Ring Current and the Dst Field: Some Recent Topics
T. lyemori 331
Current Systems in Other Magnetospheres
TUTORIAL: Currents and Flows in Distant Magnetospheres
Margaret Galland Kivelson 339
Rotational Current Systems and the Offset lo Plasma Torus
Duane H. Pontius Jr. 353
MHD Simulations of Current Systems in Planetary Magnetospheres: Mercury and Saturn
Tamas I. Gombosi, Darren L. DeZeeuw, Clinton PT. Groth, Kenneth C. Hansen, Konstantin Kabin,
Kenneth G. Powell 363
Currents in Mercury's Magnetosphere
KarlHeinz Glassmeier 371
New Analysis Techniques
A New Technique for the Mapping of Ionospheric FieldAligned Currents From
Satellite Magnetometer Data
Daniel R. Weimer 381
Automatic Identification of LargeScale FieldAligned Current Structures and its Application
to NightSide Current Systems
T. Higuchi and S. Ohtani 389
Symmetry B reaking a nd Nonlinear W aveWave I nteraction in Current Disruption: Possible
Evidence for a Phase Transition
Giuseppe Consolini and Anthony T. Y. Lui 395