GLOBAL ELECTRON CONTENT IN THE 23rd and 24th SOLAR CYCLES

 Based on the data of total electron content (TEC) Global Ionospheric Maps we analyze behavior of the ionospheric Global electron content (GEC) in the 23rd and 24th solar cycles. We study GEC dynamics during the 1998–2016 period as well as its annual, semiannual and 27-day variations. We also carry out comparison of the variations parameters in GEC and regional electron content (REC), which is the total number of electrons in the ionosphere over a certain area, for the Baikal rift zone, European and Japan regions. The maximal amplitude of considered REC variations is observed in Japan. Semiannual REC variations for all analyzed regions are in phase with GEC semiannual variations, while annual REC variations and GEC ones are opposite in phase. It is shown that general dynamics of REC, GEC and their variations repeat well the behaviour of the F10.7 solar radio emission. GEC and RECs reflect deep minimum in 2009 as well as excess of the 23rd over the 24th one. Dependence of diurnal REC variations amplitude on the F10.7 index is revealed to be close to linear, unlike the analogous Global electron content dependence. The study is supported by RF President Grant of Public Support for RF Leading Scientific Schools (НШ-6894.2016.5) and by the RFBR project No. 16-35-60018.

Y.Yasyukevich, A.Yasyukevich, I.Zhivetiev GLOBAL ELECTRON CONTENT IN THE 23rd and 24th SOLAR CYCLES \\VarSITI Irkutsk, Russia, 10-15 july 2017