scholarly journals Relation of substorm pre-onset arc to large-scale field-aligned current distribution

2012 ◽  
Vol 39 (22) ◽  
pp. n/a-n/a ◽  
Author(s):  
Y. Nishimura ◽  
L. R. Lyons ◽  
T. Kikuchi ◽  
V. Angelopoulos ◽  
E. F. Donovan ◽  
...  
Keyword(s):  
Current Distribution ◽  
Large Scale ◽  
Scale Field ◽  
Large Scale Field ◽  
Field Aligned Current

Four large-scale field-aligned current systems in the dayside high-latitude region

1995 ◽  
Vol 100 (A1) ◽  
pp. 137 ◽  
Author(s):  
S. Ohtani ◽  
T. A. Potemra ◽  
P. T. Newell ◽  
L. J. Zanetti ◽  
T. Iijima ◽  
...  
Keyword(s):  
High Latitude ◽  
Large Scale ◽  
High Latitude Region ◽  
Scale Field ◽  
Large Scale Field ◽  
Latitude Region ◽  
Field Aligned Current ◽  
Current Systems

scholarly journals Comparison of simulated and observed large-scale, field-aligned current structures

2008 ◽  
Vol 26 (2) ◽  
pp. 281-293 ◽  
Author(s):  
P. Nenovski
Keyword(s):  
Solar Wind ◽  
Large Scale ◽  
Polar Cap ◽  
Earth’S Magnetosphere ◽  
Scale Field ◽  
Input Parameters ◽  
Earth's Magnetosphere ◽  
Large Scale Field ◽  
Field Aligned Current ◽  
The Imf

Abstract. Recently, a model of large-scale, field-aligned current (FAC) structures, based on zero-frequency MHD surface wave (SW) modes that can emerge from the solar wind-Earth's magnetosphere interaction, has been proposed. The FAC polarity and intensity distribution are quantified as a function of the solar wind parameters and the interplanetary magnetic field (IMF) magnitude that enter as input parameters. Besides, there are input parameters intrinsic to the Earth's magnetosphere – the size of the polar cap and the boundary regions and their plasma density variations. Influence of the IMF By component on the FAC structure is examined here. Depending on the IMF By magnitude, the predicted six-cell FAC structure tends to evolve in a spiral-like fashion. This large-scale FAC model is compared with experimental evidences and empirical FAC models based on DE-2 satellite data and high-precision Oersted and Magsat satellite magnetometer data. Among the various achievements of these long-term satellite measurements, an observation/discovery of a ground-based state of FACs which includes a pair of large-scale FACs in the polar cap under both positive and negative IMF Bz has been pointed out. The FAC pattern is qualitatively and quantitatively consistent with experimental data for both polar cap FAC and Region 1 and Region 2 FAC systems.

scholarly journals Ionospheric conductivity dependence of dayside region-0, 1, and 2 field-aligned current systems: statistical study with DMSP-F7

2004 ◽  
Vol 22 (8) ◽  
pp. 2775-2783 ◽  
Author(s):  
K. Haraguchi ◽  
H. Kawano ◽  
K. Yumoto ◽  
S. Ohtani ◽  
T. Higuchi ◽  
...  
Keyword(s):  
Large Scale ◽  
Statistical Study ◽  
The Other ◽  
Ionospheric Conductivity ◽  
Sheet Structure ◽  
Scale Field ◽  
Large Scale Field ◽  
Field Aligned Current ◽  
Current Systems ◽  
Summary Data

Abstract. The present study statistically examines the dependence of the intensities of dayside (MLT=8-12h) large-scale field-aligned currents (FACs) on the ionospheric conductance using the summary data of DMSP-F7 constructed by the procedure of Higuchi and Ohtani (2000). We have found that, in the dayside region, R1 and R0 have a higher correlation between ionospheric conductivity and FAC intensity than R2, suggesting that R0 and R1 are driven by a more voltage-like source than R2. This result is consistent with the idea that R1 and R0 are driven by the interaction between the solar wind and the open magnetospheric magnetic field. We have also found that dayside FAC intensities are latitudinally well balanced when they have a three sheet structure (R0, R1 and R2); on the other hand, for a two sheet structure (R1 and R2), the intensity of R1 is larger than that of R2, so that the net current has the polarity of R1.

Biodata response elaboration: A large-scale field experiment

2010 ◽  
Author(s):  
Julia Levashina ◽  
Frederick P. Morgeson ◽  
Michael A. Campion
Keyword(s):  
Field Experiment ◽  
Large Scale ◽  
Scale Field ◽  
Large Scale Field
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