Solar wind intermittency studied via local intermittency measure

被引:0
作者
Bruno, R [1 ]
Bavassano, B [1 ]
Bianchini, L [1 ]
Pietropaolo, E [1 ]
Villante, U [1 ]
Carbone, V [1 ]
Veltri, P [1 ]
机构
[1] CNR, Ist Fis Spazio Interplanetario, I-00133 Rome, Italy
来源
9TH EUROPEAN MEETING ON SOLAR PHYSICS: MAGNETIC FIELDS AND SOLAR PROCESSES, VOLS 1 AND 2 | 1999年 / 448卷
关键词
solar wind; MHD turbulence; non-linear dynamics;
D O I
暂无
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Intermittency is a well established feature for many complex physical systems in Nature. For these systems, energy at a given scale is not evenly distributed in space and any variable affected by intermittency alternates bursty activity to quiescence. Solar wind doesn't represent an exception to the rule since the strong intermittent character of its fluctuations has been widely reported in literature However, so far, it has never been possible to extract intermittency from a given time series in order to show experimentally its effects on the analysis. Local Intermittency Measure provides the tools to achieve such an interesting task. This method, based on the use of wavelets, allows to locate in space and time those events which produce intermittency. Then, these same events can be removed and a new time series, without intermittency, can be reconstructed and studied. In this paper we report about the effects, experimentally determined, of intermittency on some of the parameters characterising solar wind MHD turbulence.
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收藏
页码:1147 / 1152
页数:6
相关论文
共 29 条
[1]   STATISTICAL PROPERTIES OF MHD FLUCTUATIONS ASSOCIATED WITH HIGH-SPEED STREAMS FROM HELIOS-2 OBSERVATIONS [J].
BAVASSANO, B ;
DOBROWOLNY, M ;
FANFONI, G ;
MARIANI, F ;
NESS, NF .
SOLAR PHYSICS, 1982, 78 (02) :373-384
[2]   LARGE-AMPLITUDE ALFVEN WAVES IN INTERPLANETARY MEDIUM .2. [J].
BELCHER, JW ;
DAVIS, L .
JOURNAL OF GEOPHYSICAL RESEARCH, 1971, 76 (16) :3534-+
[3]  
BIANCHINI L, 1999, THESIS U LAQUILA LAQ
[4]  
BRUNO R, 1986, ANN GEOPHYS A-UPPER, V4, P17
[5]   EVIDENCE FOR LONG PERIOD ALFVEN WAVES IN THE INNER SOLAR-SYSTEM [J].
BRUNO, R ;
BAVASSANO, B ;
VILLANTE, U .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1985, 90 (NA5) :4373-4377
[6]  
Bruno R, 1999, AIP CONF PROC, V471, P539, DOI 10.1063/1.58691
[7]  
BRUNO R, 1999, IN PRESS GEOPHYS RES
[8]   INTERMITTENT TURBULENCE IN THE SOLAR-WIND [J].
BURLAGA, LF .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1991, 96 (A4) :5847-5851
[9]   Experimental analysis of intermittent coherent structures in the near field of a high Re turbulent jet flow [J].
Camussi, R ;
Guj, G .
PHYSICS OF FLUIDS, 1999, 11 (02) :423-431
[10]  
CARBONE V, 1999, IN PRESS EUROPHYS LE