Information content and K-entropy of the present geomagnetic field

被引：23
作者：
De Santis, A [1 ]
Tozzi, R
Gaya-Piqué, LR
机构：
[1] Ist Nazl Geofis & Vulcanol, Rome, Italy
[2] Univ G DAnnunzio, Chieti, Italy
[3] Observ Ebre, Roquetes, Spain
来源：
EARTH AND PLANETARY SCIENCE LETTERS | 2004年 / 218卷 / 3-4期
关键词：
information theory; Kolmogorov entropy; geomagnetic field; geomagnetic reversals;
D O I：
10.1016/S0012-821X(03)00681-2
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Concepts of information theory are applied to global models of the geomagnetic field B of the last century. The temporal behavior of information content suggests that B is in a chaotic state with characteristic times close to those of its westward drift and of the convective overturn in the outer core and the secular variation shows a comparable characteristic time of predictability. The main implication of these results is the suggestive hypothesis that a possible geomagnetic reversal or excursion is currently in progress. (C) 2003 Elsevier B.V. All rights reserved.
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收藏
页码：269 / 275
页数：7
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