ON THE EXISTENCE OF A LORENZ STRANGE ATTRACTOR IN MAGNETOSPHERIC CONVECTION DYNAMICS

被引:9
作者
SUMMERS, D
MU, JL
机构
[1] Department of Mathematics and Statistics, Memorial University of Newfoundland, St. John's, Newfoundland
关键词
D O I
10.1029/92GL01808
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
We modify the corotating convection model usually applied to the Jovian magnetosphere by including a term that simulates the effects of microdiffusion. By applying a technique of Fourier analysis followed by three-mode truncation, we recover precisely the well known Lorenz equations of meteorology. The implications are that under certain restrictions plasma motion in the Jovian magnetosphere, which is modulated by ionospheric ohmic drag through the Pedersen ionospheric conductivity SIGMA, can be expected to be chaotic if SIGMA is less than a critical value SIGMA(c); if SIGMA is greater than SIGMA(c) the plasma motion is steady-state convection. The value of SIGMA(c) depends on a parameter q which characterizes an assumed stationary radial profile (is-proportional-to (L-q)) in plasma mass per unit magnetic flux.
引用
收藏
页码:1899 / 1902
页数:4
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