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http://hdl.handle.net/2122/363| Authors: | De Santis, A.* Tozzi, R.* Gaya-Piqué, L.* |
Title: | Information content and K-entropy of the present geomagnetic field | Journal: | Earth and Planetary Science Letters | Series/Report no.: | 218 (2004) | Publisher: | Elsevier | Issue Date: | 2004 | DOI: | doi:10.1016/S0012-821X(03)00681-2 | URL: | www.scienceserver.cilea.it | Keywords: | information theory Kolmogorov entropy geomagnetic field geomagnetic reversals |
Subject Classification: | 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals | Abstract: | 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. |
| Appears in Collections: | Article published / in press |
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