Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/3836| DC Field | Value | Language |
|---|---|---|
| dc.contributor.authorall | De Michelis, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| dc.contributor.authorall | Tozzi, R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| dc.date.accessioned | 2008-04-28T07:15:14Z | en |
| dc.date.available | 2008-04-28T07:15:14Z | en |
| dc.date.issued | 2005 | en |
| dc.identifier.uri | http://hdl.handle.net/2122/3836 | en |
| dc.description.abstract | In the present work we investigate the temporal distributions of the geomagnetic jerks occurring in the last three decades of the 20th century using a new method of analysis based on the wavelet transform: the Local Intermittency Measure (LIM). This method, which allows us to single out intermittent structures within a given time series, was applied to geomagnetic monthly means time series of the eastward magnetic field component (Y) of 44 worldwide observatories. We study the bimodal distribution of the jerk occurrence in time for the 1978 and 1991 events and point out a local/regional jerk in South Africa and in the Pacific Ocean which happened around 1986. The worldwide character of the 1999 geomagnetic jerk is also investigated integrating the LIM analysis with the traditional straight-line fit. | en |
| dc.language.iso | English | en |
| dc.publisher.name | Elsevier | en |
| dc.relation.ispartof | Earth and Planetary Science Letters | en |
| dc.relation.ispartofseries | / 235 (2005) | en |
| dc.subject | geomagnetic jerk | en |
| dc.subject | Local Intermittency Measure | en |
| dc.subject | geomagnetic secular variation | en |
| dc.subject | wavelet analysis | en |
| dc.title | A Local Intermittency Measure (LIM) approach to the detection of geomagnetic jerks | en |
| dc.type | article | en |
| dc.description.status | Published | en |
| dc.type.QualityControl | Peer-reviewed | en |
| dc.description.pagenumber | 261-272 | en |
| dc.subject.INGV | 04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals | en |
| dc.identifier.doi | 10.1016/j.epsl.2005.04.001 | en |
| dc.relation.references | [1] M. Alexandrescu, D. Gibert, G. Hulot, J.L. Le Moue¨l, G. Saracco, Worldwide wavelet analysis of geomagnetic jerks, J. Geophys. Res. 101 (1996) 21975– 21994. [2] M. Mandea, E. Bellanger, J.L. Le Moue¨l, A geomagnetic jerk for the end of the 20th century? Earth Planet. Sci. Lett. 183 (2000) 369– 373. [3] M. Alexandrescu, D. Gibert, G. Hulot, J.L. Le Moue¨l, G. Saracco, Detection of geomagnetic jerks using wavelet analysis, J. Geophys. Res. 100 (1995) 12557–12572. [4] M. Farge, M. Holschneider, J.F. Colonna, Wavelet analysis of coherent structures in two dimensional turbulent flows, Topological Fluid Mechanics, Cambridge University Press, Cambridge, 1990, p. 765. [5] P. Kumar, E. Foufoula-Georgiou, Wavelet analysis for geophysical applications, Rew. Geophys. 35 (1997) 385– 412. [6] C. Meneveau, Analysis of turbulence in the orthonormal wavelet representation, J. Fluid Mech. 232 (1991) 469– 520. [7] P.B. Kotze´, The time-varying geomagnetic field of Southern Africa, Earth Planets Space 55 (2003) 111 – 116. [8] P. De Michelis, L. Cafarella, A. Meloni, Worldwide character of the 1991 geomagnetic jerk, Geophys. Res. Lett. 25 (1998) 377–380. [9] F. Argoul, A. Arne´odo, G. Grasseau, Y. Gagne, E.J. Hopfinger, U. Frisch, Wavelet analysis of turbulence reveals the multi-fractal nature of the Richardson cascade, Nature 338 (1989) 51–53. [10] L. Cafarella, A. Meloni, Evidence for a geomagnetic jerk in 1990 across Europe, Ann. Geofis. XXXVIII (1995) 451–455. [11] S. Macmillan, A geomagnetic jerk for the early 1990’s, Earth Planet. Sci. Lett. 137 (1996) 189– 192. [12] E. Foufoula-Georgiou, P. Kumar, Wavelet in Geophysics, Academic, San Diego, CA, 1994, (384 pp.). [13] I. Daubechies, Ten Lectures on Wavelets, Soc. for Ind. And Appl. Math., Philadelphia, PA, 1992, (357 pp.). [14] R. Bruno, B. Bavassano, E. Pietropaolo, et al., Effects of intermittency on interplanetary velocity and magnetic field fluctuations anisotropy, Geophys. Res. Lett. 26 (1999) 3185– 3188. | en |
| dc.description.obiettivoSpecifico | 3.4. Geomagnetismo | en |
| dc.description.journalType | JCR Journal | en |
| dc.description.fulltext | reserved | en |
| dc.contributor.author | De Michelis, P. | en |
| dc.contributor.author | Tozzi, R. | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | 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 | 0000-0002-2708-0739 | - |
| 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 | - |
| crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| Appears in Collections: | Article published / in press | |
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| File | Description | Size | Format | Existing users please Login |
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| PDM-RT_article.pdf | 1.18 MB | Adobe PDF |
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