BURSTY BULK FLOWS IN THE INNER CENTRAL PLASMA SHEET

被引:974
作者
ANGELOPOULOS, V
BAUMJOHANN, W
KENNEL, CF
CORONITI, FV
KIVELSON, MG
PELLAT, R
WALKER, RJ
LUHR, H
PASCHMANN, G
机构
[1] UNIV CALIF LOS ANGELES, DEPT PHYS, LOS ANGELES, CA 90024 USA
[2] MAX PLANCK INST EXTRATERRESTR PHYS, W-8046 GARCHING, GERMANY
[3] UNIV CALIF LOS ANGELES, INST GEOPHYS & PLANETARY PHYS, LOS ANGELES, CA 90024 USA
[4] UNIV CALIF LOS ANGELES, DEPT EARTH & SPACE SCI, LOS ANGELES, CA 90024 USA
[5] TECH UNIV BRAUNSCHWEIG, INST GEOPHYS & METEOROL, W-3300 BRAUNSCHWEIG, GERMANY
[6] TECH UNIV BRAUNSCHWEIG, DEPT METEOROL, W-3300 BRAUNSCHWEIG, GERMANY
关键词
D O I
10.1029/91JA02701
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
High-speed flows in the inner central plasma sheet (first reported by Baumjohann et al. (1990)) are studied, together with the concurrent behavior of the plasma and magnetic field, by using AMPTE/IRM data from almost-equal-to 9 to 19 R(E) in the Earth's magnetotail. The conclusions drawn from the detailed analysis of a representative event are reinforced by a superposed epoch analysis applied on 2 years of data. The high-speed flows organize themselves in 10-min time scale flow enhancements which we call bursty bulk flow (BBF) events. Both temporal and spatial effects are responsible for their bursty nature. The flow velocity exhibits peaks of very large amplitude with a characteristic time scale of the order of a minute, which are usually associated with magnetic field dipolarizations and ion temperature increases. The BBFs represent intervals of enhanced earthward convection and energy transport per unit area in the y-z GSM direction of the order of 5 x 10(19) ergs/R(E)2.
引用
收藏
页码:4027 / 4039
页数:13
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