Quiet time plasma sheet ion pressure contribution to Birkeland currents

2000 ◽  
Vol 105 (A4) ◽  
pp. 7793-7802 ◽  
Author(s):  
Simon Wing ◽  
Patrick T. Newell
Keyword(s):  
Plasma Sheet ◽  
Quiet Time ◽  
Birkeland Currents

Observational determination of the adiabatic index in the quiet time plasma sheet

1989 ◽  
Vol 16 (6) ◽  
pp. 563-566 ◽  
Author(s):  
C. Y. Huang ◽  
C. K. Goertz ◽  
L. A. Frank ◽  
G. Rostoker
Keyword(s):  
Plasma Sheet ◽  
Adiabatic Index ◽  
Quiet Time

Quiet-time convection electric field properties derived from keV electron measurements at the inner edge of the plasma sheet by means of GEOS-2

1982 ◽  
Vol 30 (3) ◽  
pp. 261-283 ◽  
Author(s):  
B. Hultqvist ◽  
H. Borg ◽  
L.-Ă. Holmgren ◽  
H. Reme ◽  
A. Bahnsen ◽  
...  
Keyword(s):  
Electric Field ◽  
Plasma Sheet ◽  
Quiet Time ◽  
Convection Electric Field

scholarly journals Modeling the quiet time inner plasma sheet protons

2001 ◽  
Vol 106 (A4) ◽  
pp. 6161-6178 ◽  
Author(s):  
Chih-Ping Wang ◽  
Larry R. Lyons ◽  
Margaret W. Chen ◽  
Richard A. Wolf
Keyword(s):  
Plasma Sheet ◽  
Quiet Time

Multiple auroral arcs and Birkeland currents: Evidence for plasma sheet boundary waves

1986 ◽  
Vol 13 (8) ◽  
pp. 805-808 ◽  
Author(s):  
P. F. Bythrow ◽  
M. A. Doyle ◽  
T. A. Potemra ◽  
L. J. Zanetti ◽  
R. E. Huffman ◽  
...  
Keyword(s):  
Plasma Sheet ◽  
Auroral Arcs ◽  
Birkeland Currents

scholarly journals EISCAT-Cluster observations of quiet-time near-Earth magnetotail fast flows and their signatures in the ionosphere

2011 ◽  
Vol 29 (2) ◽  
pp. 299-319 ◽  
Author(s):  
T. Pitkänen ◽  
A. T. Aikio ◽  
O. Amm ◽  
K. Kauristie ◽  
H. Nilsson ◽  
...  
Keyword(s):  
High Resolution ◽  
Plasma Flow ◽  
Plasma Sheet ◽  
Velocity Shear ◽  
Optical Measurements ◽  
Return Flow ◽  
Quiet Time ◽  
Reconnection Rate ◽  
Plasma Bubble ◽  
Return Flows

Abstract. We report observations of a sequence of quiet-time Earthward bursty bulk flows (BBFs) measured by the Cluster spacecraft in the near-tail plasma sheet (XGSM ~ −12 to −14 RE) in the evening sector, and by simultaneous high-resolution measurements in the northern conjugate ionosphere by the EISCAT radars, a MIRACLE all-sky camera and magnetometers, as well as a meridian-scanning photometer (MSP) in the Scandinavian sector on 17 October 2005. The BBFs at Cluster show signatures that are consistent with the plasma "bubble" model (Chen and Wolf, 1993, 1999), e.g. deflection and compression of the ambient plasma in front of the Earthward moving bubble, magnetic signatures of a flow shear region, and the proper flows inside the bubble. In addition, clear signatures of tailward return flows around the edges of the bubble can be identified. The duskside return flows are associated with significant decrease in plasma density, giving support to the recent suggestion by Walsh et al. (2009) of formation of a depleted wake. However, the same feature is not seen for the dawnside return flows, but rather an increase in density. In the ionosphere, EISCAT and optical measurements show that each of the studied BBFs is associated with an auroral streamer that starts from the vicinity of the polar cap boundary, intrudes equatorward, brakes at 68–70° aacgm MLAT and drifts westward along the proton oval. Within the streamer itself and poleward of it, the ionospheric plasma flow has an equatorward component, which is the ionospheric manifestation of the Earthward BBF channel. A sharp velocity shear appears at the equatorward edge of a streamer. We suggest that each BBF creates a local velocity shear in the ionosphere, in which the plasma flow poleward of and inside the streamer is in the direction of the streamer and southeastward. A northwestward return flow is located on the equatorward side. The return flow is associated with decreased plasma densities both in the ionosphere and in the magnetosphere as measured by EISCAT and Cluster, respectively. In summary, we present the first simultaneous high-resolution observations of BBF return flows both in the plasma sheet and in the ionosphere, and those are in accordance with the bubble model. The results apply for the duskside return flows, but the manifestation of dawnside return flows in the ionosphere requires further studies. Finally, EISCAT measurements indicate increased nightside reconnection rate during the ~35-min period of BBFs. We suggest that the observed temporal event of IMF rotation to a more southward direction produces enhanced open flux transport to the nightside magnetotail, and consequently, the nightside reconnection rate is increased.

Birkeland currents in the plasma sheet

1993 ◽  
Vol 98 (A11) ◽  
pp. 19455-19464 ◽  
Author(s):  
Nikolai A. Tsyganenko ◽  
David P. Stern ◽  
Zerefşan Kaymaz
Keyword(s):  
Plasma Sheet ◽  
Birkeland Currents

scholarly journals Two-dimensional quiet time equilibrium for the inner plasma sheet protons and magnetic field

2002 ◽  
Vol 29 (24) ◽  
pp. 39-1-39-4 ◽  
Author(s):  
Chih-Ping Wang ◽  
Larry R. Lyons ◽  
Margaret W. Chen ◽  
Richard A. Wolf
Keyword(s):  
Magnetic Field ◽  
Plasma Sheet ◽  
Two Dimensional ◽  
Quiet Time
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