SOME FEATURES OF TURBULENT PROCESSES IN THE EARTH'S MAGNETOSPHERE FROM CLUSTER MISSION MEASUREMENTS

被引：0
|
作者：
Kozak, L. V. [1 ]
Savyn, S. P. [2 ]
Lui, A. T. [3 ]
Tsupko, O. O. [1 ]
机构：
[1] Taras Shevchenko Natl Univ Kyiv, Kiev, Ukraine
[2] Space Res Inst Russian, Moscow, Russia
[3] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA
来源：
SPACE SCIENCE AND TECHNOLOGY-KOSMICNA NAUKA I TEHNOLOGIA | 2012年 / 18卷 / 02期
关键词：
D O I：
10.15407/knit2012.02.043
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Statistical features of magnetic field fluctuations in bound regions of the Earth's magnetosphere are investigated on different time scales. The Cluster-2 mission measurements made during 2004-2009 are used for our analysis. Changes in the shape and parameters of probability density function for the magnetic field fluctuations are studied for the time intervals when the satellite was within the magneto-layer, solar plasma wind and magnetopause region. The evolution of the change of the probability density function maximum and kurtosis values are considered and structure functions of different orders are investigated as characteristics of turbulent processes for different time scales. Two asymptotic modes of the change in the maximum height for the probability density function are found which can be described with the use of different power lows. On the basis of the investigation of structure functions of high orders (up to the ninth order), the character of turbulent processes is determined and diffusion in the regions under consideration is studied. It is found that the type of the turbulent processes in the solar wind plasma differ greatly from one in the magneto-layer. Besides, super-diffusion is revealed in transitional regions of the Earth's magnetosphere.
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页码：43 / 54
页数：12
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