TY JOUR TI The atmosphere below 200 km over Norilsk at solar minimum and maximum KW gas component ratios KW geomagnetic disturbances JO Solnechno-Zemnaya Fizika AU Yakovleva, O.E. AU Kushnarenko, G.P. AU Kuznetsova, G.M. PY 2020 IS 6 PB Institute of Solar-Terrestrial Physics SB RAS