Multifractal structure and intermittence in the AE index time series

Consolini, G. and Marcucci, M.F. (1997) Multifractal structure and intermittence in the AE index time series. Il nuovo cimento C, 20 C (6). pp. 939-950. ISSN 1826-9885

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The conventional approach to magnetospheric dynamics has not provided until now a satisfactory description of the singular behaviour of magnetospheric substorms. In this paper we present a multifractal analysis of AE time series, based on singularity analysis, a new tool to investigate signal dynamics features. The existence of a multifractal structure of the AE index with respect to time dilation has been investigated. The resulting multifractal behaviour of the signal can be interpreted as the signature of an underlying intermittence phenomenon. The derived singularity spectrum is well in agreement with the one of a two-scale Cantor model (P-model), a pure multiplicative model. The presence of intermittence in AE might indicate the occurrence of turbulence in magnetospheric dissipation processes.

Item Type: Article
Additional Information: Paper presented at the VII Cosmic Physics National Conference, Rimini, October 26-28, 1994.
Uncontrolled Keywords: Physics of the ionosphere; magnetic storms, substorms; conference proceedings
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.5 Meteorologia (Classificare qui l'atmosfera) (Classificare la previsione e le previsioni di specifici fenomeni meteorologici in 551.64; classificare la Micrometeorologia in 551.66) > 551.52 Termodinamica, interazioni atmosferiche con la superficie terrestre, temperature, radiazioni > 551.527 Radiazioni (per fenomeni ottici, vedi 551.565) > 551.5276 Radiazioni cosmiche (Include il rumore cosmico) (Classificare qui i raggi cosmici)
Depositing User: Marina Spanti
Date Deposited: 09 Feb 2018 14:04
Last Modified: 09 Feb 2018 14:04

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