Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/363
DC Field | Value | Language |
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dc.contributor.authorall | De Santis, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
dc.contributor.authorall | Tozzi, R.; Università ''G. D'Annunzio'', Chieti, Italy | en |
dc.contributor.authorall | Gaya-Piqué, L.; Observatori de l'Ebre, Roquetes, Spain | en |
dc.date.accessioned | 2005-08-18T15:30:41Z | en |
dc.date.available | 2005-08-18T15:30:41Z | en |
dc.date.issued | 2004 | en |
dc.identifier.uri | http://hdl.handle.net/2122/363 | en |
dc.description.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. | en |
dc.format.extent | 353808 bytes | en |
dc.format.extent | 445 bytes | en |
dc.format.mimetype | application/pdf | en |
dc.format.mimetype | text/html | en |
dc.language.iso | English | en |
dc.publisher.name | Elsevier | en |
dc.relation.ispartof | Earth and Planetary Science Letters | en |
dc.relation.ispartofseries | 218 (2004) | en |
dc.subject | information theory | en |
dc.subject | Kolmogorov entropy | en |
dc.subject | geomagnetic field | en |
dc.subject | geomagnetic reversals | en |
dc.title | Information content and K-entropy of the present geomagnetic field | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 269-275 | en |
dc.identifier.URL | www.scienceserver.cilea.it | en |
dc.subject.INGV | 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals | en |
dc.identifier.doi | doi:10.1016/S0012-821X(03)00681-2 | en |
dc.relation.references | References [1] D.J. Stevenson, Planetary magnetic ¢elds, Rep. Prog. Phys. 46 (1983) 555-620. [2] D.R. Barraclough, A. De Santis, Some possible evidence for a chaotic geomagnetic field from observational data, Phys. Earth Planet. Inter. 99 (1997) 207-220. [3] A. De Santis, D.R. Barraclough, R. Tozzi, Nonlinear variability in the geomagnetic secular variation of the last 150 years, Fractals 10 (2002) 297-304. [4] D.J. Wales, Calculating the rate of loss of information (1991) 485-488. [5] C. Shannon, A mathematical theory of communication. Bell Syst. Tech. J. 27 (1948) 379-423, 623-656. [6] C. Beck, F. Schlogl, Thermodynamics of Chaotic Systems, Cambridge University Press, Cambridge, 1993, 306 pp. [7] P. Grassberger, I. Procaccia, Characterization of strange attractors, Phys. Rev. Lett. 50 (1983) 346-349. [8] R.T. Merrill, M.W. McElhinny, P.L. McFadden, The Magnetic Field of the Earth: Paleomagnetism, the Core and the Deep Mantle, Academic Press, San Diego, CA, 1996, 564 pp. [9] F.J. Lowes, Mean-square values on sphere of spherical harmonic vector fields, J. Geophys. Res. 71 (1966) 2179. [10] G.Backus, R. Parker, C. Constable, Foundations of Geomagnetism, Cambridge University Press, Cambridge, 1996, 370 pp. [11] M.E. Jernigan, F. d’Astous, Entropy-based texture analysis in the spatial frequency domain, IEEE T. Pattern Anal. 2 (1984) 237-244. [12] D.R.J. Chillingworth, P.J. Holmes, Dynamical systems and models for reversals of the Earth’s magnetic field, Math. Geol. 12 (1980) 41-59. [13] A. De Santis, D.R. Barraclough, R. Tozzi, Spatial and temporal spectra of the geomagnetic field and their scaling properties, Phys. Earth Planet. Inter. 135 (2003) 125-134. [14] H.G. Schuster, Deterministic Chaos, VCH, Weinheim, 1995, 291 pp. [15] M. Mandea, S. Macmillan, International Geomagnetic Reference Field of the eighth generation, Earth Planets Space 52 (2000) 1119-1124. [16] L.R. Alldredge, L. Hurwitz, Radial dipoles as the sources of the Earth’s main magnetic field, J. Geophys. Res. 69 (1964) 2631-2640. [17] F.J. Lowes, An estimate of the errors of the IGRF/DGRF fields 1945-2000, Earth Planets Space 52 (2000) 1207- 1211. [18] V. Courtillot, J.L. Le Mouel, Time variations of the Earth’s magnetic ¢eld: From daily to secular, Annu. Rev. Earth Planet. Sci. 16 (1988) 389-476. [19] W. Lowrie, Fundamentals of Geophysics, Cambridge University Press, Cambridge, 1997, 368 pp. [20] G. Hulot, C. Eymin, B. Langlais, M. Mandea, N. Olsen, Small-scale structure of the geodynamo inferred from [rsted and Magsat satellite data, Nature 416 (2002) 620-623. [21] D. Jault, C. Gire, J.L. Le Moue«l, Westward drift, core motions and exchanges of angular momentum between core and mantle, Nature 333 (1988) 353-356. [22] D.R. Barraclough, S.R.C. Malin, A fast-moving feature of westward drift, Ann. Geophys. 42 (1999) 21-26. [23] R. Hollerback, C.A. Jones, Infuence of the Earth’s inner core on the geomagnetic fluctuations and reversals, Nature, 365 (1993) 541-543. [24] D. Gubbins, The distinction between geomagnetic excursions and reversals, Geophys. J. Int. 137 (1999) [25] G. Hulot, J.L. Le Mouel, A statistical approach to the Earth’s main magnetic field, Phys. Earth Planet. Inter. 82 (1994) 167-183. [26] D. Gubbins, Mechanism for geomagnetic polarity reversals, Nature 326 (1987) 167-169. [27] J.A. Jacobs, Reversals of the Earth’s Magnetic Field, 2nd edn., Cambridge University Press, Cambridge, 1994, 356 pp. [28] R.T. Merrill, P.L. McFadden, Paleomagnetism and the nature of the geodynamo, Science 248 (1990) 345-350. [29] V. Courtillot, J.P. Valet, G. Hulot, J.L. Le Mouel, The Earth’s magnetic field: which geometry?, EOS 73 (1992) 337. | en |
dc.description.fulltext | partially_open | en |
dc.contributor.author | De Santis, A. | en |
dc.contributor.author | Tozzi, R. | en |
dc.contributor.author | Gaya-Piqué, L. | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
dc.contributor.department | Università ''G. D'Annunzio'', Chieti, Italy | en |
dc.contributor.department | Observatori de l'Ebre, Roquetes, Spain | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | - |
crisitem.author.orcid | 0000-0002-3941-656X | - |
crisitem.author.orcid | 0000-0002-1836-4078 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
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