Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/3908
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dc.contributor.authorallLepidi, S.; 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.authorallFrancia, P.; Dipartimento di Fisica, Università dell’Aquila, L’Aquila, Italyen
dc.contributor.authorallMeloni, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallPalangio, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallSchott, J. J.; EOST, IPG, Strasbourg, Franceen
dc.date.accessioned2008-06-23T10:52:25Zen
dc.date.available2008-06-23T10:52:25Zen
dc.date.issued2003en
dc.identifier.urihttp://hdl.handle.net/2122/3908en
dc.description.abstractWe conduct an analysis of the geomagnetic field variations recorded at the new Antarctic station Dome C, located very close to the geomagnetic pole, which has been operating for approximately one month during the 1999–2000 campaign. We also perform a comparison with simultaneous measurements at the Italian Antarctic station Terra Nova Bay, in order to investigate the spatial extension of the phenomena observed at very high latitude. Our results show that between the two stations the daily variation is similar and the fluctuations with f 1 mHz are coherent, provided that in both cases the comparison is made between geographically oriented components, suggesting that ionospheric currents related to the geographic position, more than field-aligned currents, are responsible for the lowest frequency variations; conversely, higher frequency (Pc5) fluctuations are substantially decoupled between the two stations. We also found that at Dome C the fluctuation power in the 0.55–6.7 mHz frequency band is well related with the solar wind speed during the whole day and that at Terra Nova Bay the correlation is also high, except around local geomagnetic noon, when the station approaches the polar cusp. These results indicate that the solar wind speed control of the geomagnetic field fluctuation power is very strict in the polar cap and less important close to the polar cusp.en
dc.language.isoEnglishen
dc.publisher.nameEGU - Copernicus Publicationsen
dc.relation.ispartofAnnales Geophysicaeen
dc.relation.ispartofseries4 / 21 (2003)en
dc.subjectMagnetospheric physicsen
dc.subjectMHD waves and instabilitiesen
dc.subjectPolar cap phenomenaen
dc.subjectSolar wind-magnetosphere interactionsen
dc.titleLow frequency geomagnetic field variations at Dome C (Antarctica)en
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber923-932en
dc.subject.INGV01. Atmosphere::01.03. Magnetosphere::01.03.03. Magnetospheric physicsen
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H.: Introduction to Geomagnetic fields, Cambridge University Press, 1997. De Lauretis, M., Villante, U., Vellante, M., andWolfe, A.: An analysis of power spectral indices in the micropulsation frequency range at different ground stations, Planet. Space Sci., 39, 975– 982, 1991. Detrick, D. L. and Lanzerotti, L. J.: Geomagnetic quiet time (Sq) variations at high latitudes, Geophys. Res. Lett., 28, 2581–2584, 2001. Engebretson, M. J., Hughes, W. J., Alford, J. L., Zesta, E., Cahill Jr., L. J., Arnoldy, R. L., and Reeves, G. D.: Magnetometer array for cusp and cleft studies observations of the spatial extent of broadband ULF magnetic pulsations at cusp/cleft latitudes, J. Geophys. Res., 100, 19 371–19 386, 1995. Engebretson, M. J., Glassmaier, K. H., and Stellmark, M.: The dependence of high latitude Pc5 wave power on solar wind velocity and on the phase of high speed solar wind streams, J. Geophys. Res., 103, 26 271–26 283, 1998. Kleimenova, N. G., Kosyreva, O. 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Geophys. Res, 107, SMP 22- 1–SMP22-12, 2002. Ziesolleck, C. W. S. and McDiarmid, D. R.: Auroral latitude Pc5 field line resonances: quantized frequencies, spatial characteristics and diurnal variations, J. Geophys. Res., 99, 5817–5830, 1994. Ziesolleck, C. W. S. and McDiarmid, D. R.: Statistical survey of auroral latitude Pc5 spectral and polarization characteristics, J. Geophys. Res., 100, 19 299–19 312, 1995.en
dc.description.obiettivoSpecifico1.6. Osservazioni di geomagnetismoen
dc.description.obiettivoSpecifico3.4. Geomagnetismoen
dc.description.obiettivoSpecifico3.9. Fisica della magnetosfera, ionosfera e meteorologia spazialeen
dc.description.journalTypeJCR Journalen
dc.description.fulltextreserveden
dc.contributor.authorLepidi, S.en
dc.contributor.authorCafarella, L.en
dc.contributor.authorFrancia, P.en
dc.contributor.authorMeloni, A.en
dc.contributor.authorPalangio, P.en
dc.contributor.authorSchott, J. J.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.departmentDipartimento di Fisica, Università dell’Aquila, L’Aquila, Italyen
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.departmentEOST, IPG, Strasbourg, Franceen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
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.deptEOST, IPG, Strasbourg, France-
crisitem.author.orcid0000-0002-5692-2560-
crisitem.author.orcid0000-0003-2005-8923-
crisitem.author.orcid0000-0003-1155-401X-
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.parent01. Atmosphere-
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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