Observation examples of the neutral atmosphere lifting during themosphericmagnetic storms

Using the neutral atmospheric data of number density radio of n ( He) / n ( N-2) and n (O) / n ( N-2), from the satellite AE-D we analyse their variat ions during magnetic storms in November, 1975. The results indicate that th e response of atmospheric constituents to the geomagnetic heating is basica lly coincided with that expected from related theory. The lifting of the ne utral atmosphere with higher proportion of heavier constituents (such as N- 2 and Ar) leads to a relative decrease of the concentration of lighter cons tituents (such as He and O). The ratio of n (He)/n(N-2) decreases by about one order of magnitude at 150km, while n (Ar) / n (N-2) increases by a litt le more than one order of magnitude, as compared with that during magnetic quiet day. The variation of number density ratio varies with altitude, but their developing tendencies with storm time at different heights are simila r.