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Local intermittency measure analysis of AE index: The directly driven and unloading component
Author(s) -
Consolini Giuseppe,
De Michelis Paola
Publication year - 2005
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2004gl022063
Subject(s) - intermittency , electrojet , measure (data warehouse) , solar wind , earth's magnetic field , index (typography) , physics , atmospheric sciences , geophysics , meteorology , plasma , computer science , magnetic field , quantum mechanics , database , world wide web , turbulence
The Auroral Electrojet (AE) index, introduced to track the global high‐latitude geomagnetic activity, is representative of two different processes (Kamide and Kokubun, 1996): the solar‐wind directly driven convection enhancement, and the impulsive unloading process. Here, we present a new technique, based on the Local Intermittency Measure analysis, to separate these two contributions in the AE index. In detail, we applied this approach to extract the coherent intermittent structures that are linked with the impulsive unloading process.