%0 Journal Article
%4 sid.inpe.br/mtc-m21b/2017/12.01.15.15
%2 sid.inpe.br/mtc-m21b/2017/12.01.15.15.23
%@doi 10.5194/npg-2017-42
%@issn 1023-5809
%T A correlation study regarding the AE index and ACE solar wind data for Alfvénic intervals using wavelet decomposition and reconstruction
%D 2017
%8 Aug.
%9 journal article
%A Guarnieri, Fernando L.,
%A Tsurutani, Bruce T.,
%A Vieira, Luis Eduardo Antunes,
%A Hajra, Rajkumar,
%A Echer, Ezequiel,
%A Mannucci, Antony J.,
%A Gonzalez Alarcon, Walter Demetrio,
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Jet Propulsion Laboratory, California Institute of Technology
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Laboratoire de Physique et Chimie de l'Environement et de l'Espace
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Jet Propulsion Laboratory, California Institute of Technology
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@electronicmailaddress Fernando.Guarnieri@gmail.com
%@electronicmailaddress
%@electronicmailaddress luis.vieira@inpe.br
%@electronicmailaddress
%@electronicmailaddress ezequiel.echer@inpe.br
%@electronicmailaddress
%@electronicmailaddress walter.gonzalez@inpe.br
%B Nonlinear Processes in Geophysics Discussions
%V 42
%P 1-16
%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. This filtered interplanetary magnetic field (IMF) data is fed into a model to calculate a time series which we call AE*. This model was adjusted assuming that magnetic reconnection associated with southward directed IMF Bz is the main mechanism transferring energy into the magnetosphere. The calculated AE* was compared to the observed AE index using cross correlation analysis. The results show correlations as high as 0.90. Empirical removal of the high-frequency, shortwavelength 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.
%@language en
%3 guarnieri_correlation.pdf