TY JOUR TI Long-term variations in the neutral gas composition of the termosphere above Irkutsk KW ratios of dominant gas components of the thermosphere KW geomagnetic disturbances KW seasonal variations JO Solnechno-Zemnaya Fizika AU Kushnarenko, G.P. AU Yakovleva, O.E. AU Kuznetsova, G.M. PY 2015 IS 1 PB INFRA-M Academic Publishing LLC.