TY JOUR TI Investigating seasonal features of electron temperature enhancement regions in the subauroral ionosphere KW subauroral ionosphere KW numerical model KW electron temperature enhancement KW seasonal features KW ring current KW ring-shaped and sickle-shaped regions KW CHAMP JO Solnechno-Zemnaya Fizika AU Gololobov, A.Y. AU Golikov, I.A. PY 2019 IS 5 PB INFRA-M Academic Publishing LLC.