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Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/3973
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| Title: | Some possible evidence for a chaotic geomagnetic field from observational data |
| Authors: | Barraclogh, D. R.* De Santis, A.* |
| Keywords: | geomagnetic field chaos non-linear forecasting approach |
| Issue Date: | Feb-1997 |
| Publisher: | Elsevier |
| Title of journal: | Physics of the Earth and Planetary Interiors |
| Series/Report no.: | 3-4 / 99 (1997) |
| Abstract: | The behaviour of the geomagnetic field as observed almost continuously at three European locations over the last 130 years is investigated by means of a non-linear forecasting approach. The analysis of the data in terms of first-differences
(secular variation) of the horizontal magnetic components made in phase space with the simplex technique seems to exclude
the pre-eminence of any stochastic or periodic behaviour. The dimensionality of the underlying non-linear process and the
corresponding largest positive Lyapunov exponent are estimated. The results give some evidence that the geomagnetic field evolves as a non-linear chaotic system with unpredictable behaviour after times greater than a few years, confirming the common practice of updating global models of the geomagnetic field every 5 years. |
| URI: | http://hdl.handle.net/2122/3973 |
| Appears in Collections: | Papers Published / Papers in press 04.01.03. Mantle and Core dynamics 04.05.02. Geomagnetic field variations and reversals
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