Spatial and temporal variations of the cold dense plasma sheet: Evidence for a low-latitude boundary layer source?

2003 ◽  
pp. 253-264 ◽  
Author(s):  
Marit Øieroset ◽  
Tai D. Phan ◽  
Masaki Fujimoto ◽  
Leon Chan ◽  
Robert P. Lin ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Plasma Sheet ◽  
Dense Plasma ◽  
Temporal Variations ◽  
Spatial And Temporal Variations ◽  
Low Latitude ◽  
Low Latitude Boundary Layer

The low-latitude boundary layer and the boundary plasma sheet at low altitude: Prenoon precipitation regions and convection reversal boundaries

1991 ◽  
Vol 96 (A12) ◽  
pp. 21013 ◽  
Author(s):  
Patrick T. Newell ◽  
William J. Burke ◽  
Ennio R. Sánchez ◽  
Ching-I. Meng ◽  
Marian E. Greenspan ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Plasma Sheet ◽  
Low Latitude ◽  
Boundary Plasma ◽  
Low Altitude ◽  
Low Latitude Boundary Layer

scholarly journals Temperature anisotropies of electrons and two-component protons in the dusk plasma sheet

2007 ◽  
Vol 25 (6) ◽  
pp. 1417-1432 ◽  
Author(s):  
M. N. Nishino ◽  
M. Fujimoto ◽  
T. Terasawa ◽  
G. Ueno ◽  
K. Maezawa ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Solar Wind ◽  
Magnetic Reconnection ◽  
Plasma Sheet ◽  
Cold Plasma ◽  
Strong Anisotropy ◽  
Low Latitude ◽  
Selective Heating ◽  
Two Component ◽  
Low Latitude Boundary Layer

Abstract. To investigate the cold plasma sheet formation under northward IMF, we study the temperature anisotropies of electrons and two-component protons observed by the Geotail spacecraft. The two-component protons, which are occasionally observed in the dusk plasma sheet near the low-latitude boundary, are the result of spatial mixing of the hot protons of the magnetosphere proper and the cold protons from the solar wind. Recent research focusing on the two-component protons reported that the cold proton component at times has a strong anisotropy, and that the sense of the anisotropy depends on the observed locations. Since electrons have been known to possess a strong parallel anisotropy around the low-latitude boundary layer, we compare anisotropies of electrons and protons to find that the strengths of parallel anisotropies of electrons and the cold proton component are in good correlation in the tail flank. The parallel anisotropy of electrons is stronger than that of the cold proton component, which is attributed to selective heating of electrons. We further find that the strengths of the parallel anisotropies in the tail flank depend on the latitudinal angle of the IMF; strong parallel anisotropies occur under strongly northward IMF. We discuss that the Kelvin-Helmholtz vortices, which developed under strongly northward IMF, and the resultant magnetic reconnection therein may lead to the strong parallel anisotropies observed in the tail flank.

scholarly journals Travelling convection vortices in the ionosphere map to the central plasma sheet

1996 ◽  
Vol 14 (10) ◽  
pp. 1025-1031 ◽  
Author(s):  
A. Yahnin ◽  
T. Moretto
Keyword(s):  
Boundary Layer ◽  
Plasma Sheet ◽  
Satellite Measurements ◽  
Low Latitude ◽  
Central Plasma ◽  
Precipitation Boundary ◽  
Boundary Plasma ◽  
Central Plasma Sheet ◽  
Low Altitude ◽  
Low Latitude Boundary Layer

Abstract. We investigate the magnetospheric domain responsible for the generation of ionospheric travelling convection vortices (TCV) by comparing the location of the TCV to the locations of the low-altitude particle-precipitation boundaries deduced from the DMSP satellite measurements. For three very well documented TCV events we are able to identify suitable satellite passes, in the sense that for each event we can identify two to three passes occurring close to the TCV observation in both time and space. In all three cases the comparisons place the TCV centres at or equatorward of the central plasma sheet/boundary plasma sheet precipitation boundary. Thus our results indicate that the field-aligned currents related to the TCV originate in the plasma sheet rather than at the magnetopause or in the low-latitude boundary layer, as previous studies suggest.

Energetic Particle Observations in the Low-Latitude Boundary Layer

1985 ◽  
Vol 90 (A6) ◽  
pp. 5097 ◽  
Author(s):  
D. J. Williams ◽  
D. G. Mitchell ◽  
T. E. Eastman ◽  
L. A. Frank
Keyword(s):  
Boundary Layer ◽  
Energetic Particle ◽  
Low Latitude ◽  
Low Latitude Boundary Layer
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