%0 Journal Article %T A correlation study regarding the AE index and ACE solar wind data for Alfvénic intervals using wavelet decomposition and reconstruction %+ Instituto Nacional de Pesquisas Espaciais (INPE) %+ Jet Propulsion Laboratory (JPL) %+ Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E) %A Guarnieri, Fernando, L %A Tsurutani, Bruce, T %A Vieira, Luis, E A %A Hajra, Rajkumar %A Echer, Ezequiel %A Mannucci, Anthony %A Gonzalez, Walter, D %< avec comité de lecture %@ 1023-5809 %J Nonlinear Processes in Geophysics %I European Geosciences Union (EGU) %V 25 %N 1 %P 67-76 %8 2018 %D 2018 %R 10.5194/npg-25-67-2018 %Z Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] %Z Physics [physics]/Physics [physics]/Space Physics [physics.space-ph]Journal articles %X The purpose of this study is to present a wavelet interactive filtering and reconstruction technique and apply this to the solar wind magnetic field components detected at the L1 Lagrange point ∼ 0.01 AU upstream of the Earth. These filtered interplanetary magnetic field (IMF) data are fed into a model to calculate a time series which we call AE *. This model was adjusted assuming that magnetic reconnec-tion associated with southward-directed IMF B z is the main mechanism transferring energy into the magnetosphere. The calculated AE * was compared to the observed AE (auroral electrojet) index using cross-correlation analysis. The results show correlations as high as 0.90. Empirical removal of the high-frequency, short-wavelength Alfvénic component in the IMF by wavelet decomposition is shown to dramatically improve the correlation between AE * and the observed AE index. It is envisioned that this AE * can be used as the main input for a model to forecast relativistic electrons in the Earth's outer radiation belts, which are delayed by ∼ 1 to 2 days from intense AE events. %G English %2 https://insu.hal.science/insu-01976508/document %2 https://insu.hal.science/insu-01976508/file/npg-25-67-2018.pdf %L insu-01976508 %U https://insu.hal.science/insu-01976508 %~ OBSPM %~ INSU %~ CNRS %~ UNIV-ORLEANS %~ CNES %~ OSUC %~ LPC2E %~ PSL %~ OBSPM-PSL %~ ANR