Phase asynchrony of hemispheric flare activity revisited: empirical mode decomposition and wavelet transform analyses

被引：29

作者：

Deng, L. H. ^{[1
,2
]}

Gai, N. ^{[3
]}

Tang, Y. K. ^{[3
]}

Xu, C. L. ^{[4
]}

Huang, W. J. ^{[5
]}

机构：

[1] Chinese Acad Sci, Natl Astron Observ, Yunnan Astron Observ, Kunming 650011, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

[3] Dezhou Univ, Dept Phys, Dezhou 253023, Peoples R China

[4] Yunnan Normal Univ, Dept Math, Kunming 650092, Peoples R China

[5] Kunming Univ Sci & Technol, Oxbridge Coll, Kunming 650106, Peoples R China

来源：

ASTROPHYSICS AND SPACE SCIENCE | 2013年 / 343卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Sun: activity; Sun: flares; Methods: data analysis; SUNSPOT NUMBERS; SOLAR; ASYMMETRY; PERIODICITY;

D O I：

10.1007/s10509-012-1231-2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The phase relation of flare index in the northern and southern hemispheres in the time interval of January 1966 to December 2008 is investigated. It is found that, (1) the flare index in the northern hemisphere begin six months earlier than that in the southern one, which should lead to phase asynchrony between them but with a slight effect; (2) the main periods of the flare activity in the two hemispheres slightly differ from each other, which should also lead to phase asynchrony between them; (3) the low-frequency modes of the flare activity can be used to study the varying relationship of long-term solar activities and the high-frequency modes can be considered as the stochastic component that is amplitude modulated.

引用

页码：27 / 32

页数：6

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