Analysis of the data of IMF Bz and AE index for the period 1999-2018

Yuryi Polozov,A Dmitriev,N Salikhov,Z Rakhmonov,G Vodinchar

doi:10.1051/e3sconf/202019602005

Yuryi Polozov, A Dmitriev + Show 3 more

Open Access

https://doi.org/10.1051/e3sconf/202019602005

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Abstract

Solar-terrestrial relations are a part of space weather and they make significant impact on technosphere functioning. Interplanetary Magnetic Field (IMF) parameters measured at Lagrange point L1 show the beginning of possible changes in geophysical fields. The paper analyzes statistically IMF Bz component (shows the level of impact on the Earth magnetic field) and AE index (used to estimate the energy contribution into magnetosphere and ionosphere). Using the apparatus of regression analysis and wavelet transform, time series were estimated. Regression models of IMF parameters and AE index were developed for the period 1999-2018.

Highlights

Mechanism of solar-terrestrial relations provides energy transfer from interplanetary space to geospheric shells that significantly affects technosphere and human life
We developed regression models of the type YY = cc1xx1 + cc2xx2 + ⋯ + ccnnxxnn + dd, where Y is the total value of auroral index (AE) index over 24 hours, xxii are the factors affecting AE, ccii, dd are the model estimated parameters
To estimate the changes occurring in interplanetary magnetic field (IMF) Bz, southern Bz periods were grouped according to duration (Fig. 1a)

Summary

Introduction

Mechanism of solar-terrestrial relations provides energy transfer from interplanetary space to geospheric shells that significantly affects technosphere and human life. The important mechanism of energy transfer from the Sun to the Earth's magnetosphere is the magnetic reconnection [1]. It takes place if interplanetary magnetic field (IMF) lines are directed southward and IMF and geomagnetic field are connected in the magnetopause region. After this connection, IMF lines move to the magnetosphere tail [1]. The time of IMF line turn to the south can be detected on the basis of IMF Bz-component This component is often used to analyze and to forecast geo-effective events [4 - 6]

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