TY  - JOUR
KW  - Io torus
KW  -  Jovian magnetosphere
KW  -  Jupiters inner
KW  -  Interchange
KW  -  Corotation
KW  -  Signatures
A1  - Hill, TW
A1  - Rymer, AM
A1  - Burch, JL
A1  - Crary, FJ
A1  - Young, DT
A1  - Thomsen, MF
A1  - Delapp, D
A1  - Andre, N
A1  - Coates, AJ
A1  - Lewis, GR
JF  - Geophysical Research Letters
SN  - 0094-8276
UR  - http://dx.doi.org/10.1029/2005GL022620
PB  - AMER GEOPHYSICAL UNION
ID  - discovery120191
N2  - [ 1] Radial convective transport of plasma in a rotation-dominated magnetosphere implies alternating longitudinal sectors of cooler, denser plasma moving outward and hotter, more tenuous plasma moving inward. The Cassini Plasma Spectrometer ( CAPS) has provided dramatic new evidence of this process operating in the magnetosphere of Saturn. The inward transport of hot plasma is accompanied by adiabatic gradient and curvature drift, producing a V-shaped dispersion signature on a linear energy-time plot. Of the many (similar to 100) such signatures evident during the first two Cassini orbits, we analyze a subset ( 48) that are sufficiently isolated to allow determination of their ages, widths, and injection locations. Ages are typically < 10.8 hr ( Saturn's rotation period) but range up to several rotation periods. Widths are typically < 1 RS ( Saturn's radius) but range up to several RS. Injection locations are randomly distributed in local time and in Saturnian longitude. The apex of the V sometimes coincides with a localized density cavity in the cooler background plasma, and usually coincides with a localized diamagnetic depression of the magnetic field strength. These signatures are fully consistent with the convective motions that are expected to result from the centrifugal interchange instability.
N1  - Copyright 2005 by the American Geophysical Union
IS  - 14
VL  - 32
AV  - public
Y1  - 2005/06/22/
TI  - Evidence for rotationally driven plasma transport in Saturn's magnetosphere
ER  -