Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/7166| DC Field | Value | Language |
|---|---|---|
| dc.contributor.authorall | De Michelis, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| dc.contributor.authorall | Consolini, G.; Istituto Nazionale di Astrofisica–Istituto di Fisica dello Spazio Interplanetario, Rome, Italy | en |
| dc.contributor.authorall | Materassi, M.; Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Sesto Fiorentino, Italy | en |
| dc.contributor.authorall | Tozzi, R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| dc.date.accessioned | 2011-10-24T06:44:39Z | en |
| dc.date.available | 2011-10-24T06:44:39Z | en |
| dc.date.issued | 2011-08-27 | en |
| dc.identifier.uri | http://hdl.handle.net/2122/7166 | en |
| dc.description.abstract | One of the most interesting aspects of the global magnetospheric response to solar wind changes is the relationship between storms and substorms. Here we present new results on the relationship between these two different classes of magnetospheric phenomena by approaching the problem on the side of information theory. Using the Auroral Electrojet AL and SYM‐H indices as representative proxies of magnetic substorms and storms, we investigate the transfer of information by means of transfer entropy analysis (Schreiber, 2000). The obtained results seem, on average, to indicate the presence of a net transfer of information from AL to SYM‐H on time scales shorter than 10 h. On the basis of this result, geomagnetic substorms may act as a driver for the occurrence of geomagnetic storms. However, carrying out a more careful analysis which takes into account the global geomagnetic daily activity, we suggest that the direction of information flow between substorms and storms depends on the global activity level. Indeed, if it is true that a sequence of magnetospheric substorms may drive a moderate storm, it is also true that very large storms may dominate and drive the occurrence of magnetospheric substorms. | en |
| dc.language.iso | English | en |
| dc.publisher.name | American Geophysical Union | en |
| dc.relation.ispartof | Journal of Geophysical Research | en |
| dc.relation.ispartofseries | /116 (2011) | en |
| dc.subject | Storm-substorm relationship | en |
| dc.subject | Information theory | en |
| dc.title | An information theory approach to the storm‐substorm relationship | en |
| dc.type | article | en |
| dc.description.status | Published | en |
| dc.type.QualityControl | Peer-reviewed | en |
| dc.description.pagenumber | A08225 | en |
| dc.subject.INGV | 01. Atmosphere::01.03. Magnetosphere::01.03.02. Magnetic storms | en |
| dc.subject.INGV | 01. Atmosphere::01.03. Magnetosphere::01.03.03. Magnetospheric physics | en |
| dc.subject.INGV | 05. General::05.01. Computational geophysics::05.01.04. Statistical analysis | en |
| dc.identifier.doi | 10.1029/2011JA016535 | en |
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Geoelectr., 44, 109. Kamide, Y., et al. (1998), Current understanding of magnetic storms: Storm‐substorm relationship, J. Geophys. Res., 103, 17,705, doi:10.1029/98JA01426. Klimas, A. J., D. Vassiliadis, D. Baker, and D. Roberts (1996), The organized nonlinear dynamics of the magnetosphere, J. Geophys. Res., 101, 13,089, doi:10.1029/96JA00563. Knuth, K. H., et al. (2005), Revealing relationships among relevant climate variables with information theory, paper presented at the Earth‐Sun System Technology Conference, NASA, Adelphi, Md. Kraskov, A., H. Stögbauer, and P. Grassberger (2004), Estimating mutual information, Phys. Rev. E, 69, 066138. Liou, K., C.‐I. Meng, P. Newell, K. Takahashi, S.‐I. Ohtani, A. Lui, M. Brittnacher, and G. Parks (2000), Evaluation of low‐latitude Pi2 pulsations as indicators of substorm onset using Polar ultraviolet imagery, J. Geophys. Res., 105, 2495, doi:10.1029/1999JA900416. Liou, K., P. Newell, D. Sibeck, C.‐I. Meng, M. Brittnacher, and G. 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(2000), Determination of the effects of substorms on the storm‐time ring current using neural networks, J. Geophys. Res., 105, 27,833, doi:10.1029/2000JA000041. Reeves, G. D., and M. G. Henderson (2001), The storm‐substorm relationship: Ion injections in geosynchronous orbit in the nighttime sector during magnetospheric substorms, J. Geophys. Res., 106, 5833, doi:10.1029/ 2000JA003017. Rostoker, G. (1996), Phenomenology and physics of magnetospheric substorms, J. Geophys. Res., 101, 12,955, doi:10.1029/96JA00127. Rostoker, G., et al. (1997), Comment on decay of the Dst field of geomagnetic disturbance after onset and its implication to storm‐substorm relation (by Iyemori and Rao), Ann. Geophys., 15, 848. Schreiber, T. (2000), Measuring information transfer, Phys. Rev. Lett., 85, 461. Shannon, C. E. (1948), A mathematical theory of communication, Bell Syst. Tech. J., 27, 379. Sitnov, M., A. Sharma, K. Papadopoulos, D. Vassiliadis, J. Valdivia, A. Klimas, and D. Baker (2000), Phase transition‐like behavior of the magnetosphere during substorms, J. Geophys. Res., 105, 12,955, doi:10.1029/1999JA000279. Theiler, J., et al. (1992), Testing for nonlinearity in time series: The method of surrogate data, Phys. Rev. D, 58, 77. Wanliss, J. A., and P. Dobias (2007), Space storm as a phase transition, J. Atmos. Sol. Terr. Phys., 69, 675. Wanliss, J. A., and K. M. Showalter (2006), High‐resolution global storm index: Dst versus SYM‐H, J. Geophys. Res., 111, A02202, doi:10.1029/ 2005JA011034. Wanliss, J. A., and V. Uristky (2010), Understanding bursty behavior in midlatitude geomagnetic activity, J. Geophys. Res., 115, A03215, doi:10.1029/2009JA014642. Wu, C.‐C., et al. (2004), Identification of substorms within storms, J. Atmos. Sol. Terr. Phys., 66, 125. | en |
| dc.description.obiettivoSpecifico | 3.9. Fisica della magnetosfera, ionosfera e meteorologia spaziale | en |
| dc.description.journalType | JCR Journal | en |
| dc.description.fulltext | restricted | en |
| dc.contributor.author | De Michelis, P. | en |
| dc.contributor.author | Consolini, G. | en |
| dc.contributor.author | Materassi, M. | 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 dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Sesto Fiorentino, Italy | 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 | INAF – Istituto di Astrofisica e Planetologia Spaziali, 00133 Roma, Italy | - |
| crisitem.author.dept | Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | - |
| crisitem.author.orcid | 0000-0002-2708-0739 | - |
| crisitem.author.orcid | 0000-0002-3403-647X | - |
| 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 | 01. Atmosphere | - |
| crisitem.classification.parent | 01. Atmosphere | - |
| crisitem.classification.parent | 05. General | - |
| 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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| JGR2011_116.pdf | 852.76 kB | Adobe PDF |
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