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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/3167
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dc.contributor.authorallMeloni, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallCafarella, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallDe Michelis, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallTozzi, R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.date.accessioned2007-12-13T07:55:00Zen
dc.date.available2007-12-13T07:55:00Zen
dc.date.issued2007en
dc.identifier.urihttp://hdl.handle.net/2122/3167en
dc.description.abstractSome of the most interesting features of the geomagnetic field and its time variations are displayed in polar areas. Observatory monthly means usually provide an excellent opportunity to study the temporal changes of the magnetic field at a given location. Unfortunately, on the Antarctic continent the distribution of the permanent ground- based observatories does not permit a uniform coverage of the examined area. Furthermore, the magnetic records are characterized by intense external disturbances and noise that make the analysis of the magnetic field difficult. To improve our knowledge of the secular variation and detect the presence of secular variation impulses (geomagnetic jerks) in Antarctica, we use both observatory data and the CM4 quiet time magnetic field model. In particular CM4 improves our knowledge of geomagnetic jerks over Antarctica through the study of the sign changes of the secular acceleration maps.en
dc.language.isoEnglishen
dc.publisher.nameUSGSen
dc.relation.ispartofUSGS Open-File Report 2007-1047, Short Research Paper 071en
dc.relation.ispartofseries/ Short Research Paper 071 (2007)en
dc.subjectthe geomagnetic field and its time variationsen
dc.subjectsecular variation and geomagnetic jerks in Antarcticaen
dc.subjectgeomagnetic observatoriesen
dc.subjectsign changes of the secular acceleration mapsen
dc.titleThe contribution of geomagnetic observatories and magnetic models to the study of secular variation and jerks in Antarcticaen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumberon line onlyen
dc.identifier.URLhttp://pubs.usgs.gov/of/2007/1047/srp/srp071/index.htmlen
dc.subject.INGV04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversalsen
dc.identifier.doi10.3133/of2007-1047.srp071en
dc.relation.referencesAlexandrescu, M., D. Gibert, G. Hulot, J.L. Le Mouël, and G. Saracco (1996), Worldwide wavelet analysis of geomagnetic jerks, J. Geophys. Res., 101, 21975-21994. Bloxham, J., S. Zatman and M. Dumberry (2002), The origin of geomagnetic jerks, Nature, 420, 65-68. Chambodut, A, and M. Mandea (2005), Evidence for geomagnetic jerks in comprehensive models, Earth Planets Space, 57, 139-149. Chambodut, A, M. Mandea, and C. Eymin (2005), Geomagnetic jerks detected from comprehensive magnetic field models, Geophys. Res. Abstracts, 7, 05165. Courtillot, V., J. Ducruix, and J.L. Le Mouël (1978), Sur une accélération récente de la variation séculaire du champ magnétique terrestre, C.R. Acad. Sci. Ser. D, 287, 1095-1098. De Michelis, P., L. Cafarella, and A. Meloni (2000), A global analysis of the 1991 geomagnetic jerk, Geophys. J. Int., 143, 545-556. De Michelis, P., and R. Tozzi (2005), A local intermittency measure (LIM) approach to the detection of geomagnetic jerks, Earth Planet. Sci. Lett., 235, 261-272. De Santis, A., R. Tozzi, and L. Gaya-Piqué (2004), Information Content and K-entropy of the Present Earth Magnetic Field, Earth Planet. Sci. Lett., 218, 269-275. Gubbins, D., A. L. Jones, and C.C. Finlay (2006), Fall in Earth’s magnetic field is erratic, Science, 312, 900-902. Kerridge, D. (2001), Intermagnet: worldwide near-real-time geomagnetic observatory data, Proceedings of the Workshop on Space Weather, ESTEC. Lepidi, S., L. Cafarella, P. Francia, A. Meloni, P. Palangio, and J. J. Schott (2003), Low frequency geomagnetic field variations at Dome C (Antarctica), Annales Geophysicae, 21, 923–932. Macmillan, S. (1996), A geomagnetic jerk for the early 1990’s, Earth Planet. Sci. Lett., 137, 189-192. Malin, S.R.C., and B.M. Hodder (1982), Was the 1970 geomagnetic jerk of internal or external origin?, Nature, 296, 726-728. MacMillan, S. and S. Maus (2005), International Geomagnetic Reference Field – the tenth generation, Earth Planets and Space, 57, 1135-1140. Mandea, M., E. Bellanger, and J.L. Le Mouël (2000), A geomagnetic jerk for the end of the 20th century?, Earth Planet. Sci. Lett., 183, 369- 373. Mandea, M., and B. Langlais (2002), Observatory crustal magnetic biases during MAGSAT and Ørsted satellite missions, Geophys. Res. Lett., 29, 10.1029/2001GL013693. Meloni, A., L. R. Gaya-Piqué, P. De Michelis, and A. De Santis (2006), Some recent characteristics of geomagnetic secular variations in Antarctica, from: Fütterer D.K. at al. (eds) Antarctica: Contributions to global earth sciences, Spring-Verlag, Berlin Heidelberg New York, 377-382. Nagao, H., T. Iyemori, T. Higuchi, and T. Araki (2003), Lower mantle conductivity anomalies estimated from geomagnetic jerks, J. Geophys. Res., 108, 2254, doi: 10.1029/2002JB001786. Olsen, N., and M. Mandea (2007), Investigation of a secular variation impulse using satellite data: the 2003 geomagnetic jerk, Earth Planet. Sci. Lett., 255, 94-105. Rajaram, G., T. Arun, A. Dhar, and G. Patil (2002), Rapid decrease in total magnetic field F at Antarctic stations – its relationship to core- mantle features, Antarctic Sci., 14, 61-68. Sabaka, T., N. Olsen, and M. E. Purucker (2004), Extending comprehensive models of the Earth’s magnetic field with Ørsted and CHAMP data, Geophys. J. Int., 159, 521-547. Waddington, R., D. Gubbins, and N. Barber (1995), Geomagnetic field analysis-V. Determining steady core-surface flows directly from geomagnetic observations, Geophys. J. Int., 122, 326-350.en
dc.description.obiettivoSpecifico3.4. Geomagnetismoen
dc.description.journalTypeN/A or not JCRen
dc.description.fulltextopenen
dc.contributor.authorMeloni, A.en
dc.contributor.authorCafarella, L.en
dc.contributor.authorDe Michelis, P.en
dc.contributor.authorTozzi, R.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.orcid0000-0003-1155-401X-
crisitem.author.orcid0000-0003-2005-8923-
crisitem.author.orcid0000-0002-2708-0739-
crisitem.author.orcid0000-0002-1836-4078-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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