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Vertical ion drifts
Observations
TIEGCM results
40
40
Equinox
20
20
0
0
F10.7
220
220
85
150
240
240
200
40
40
June
20
20
0
0
2
20
2
20
2
40
2
40
40
40
December
20
20
0
0
220
220
240
240
06
10
14
18
22
02
06
06
10
14
18
22
02
06
Zonal ion drifts
200
200
100
Equinox
100
0
0
2100
2100
2
200
2
200
200
200
100
June
100
0
0
2100
2100
2
200
2
200
200
200
100
100
December
0
0
2
100
2
100
No data for F10.7 200
2200
2200
06
10
14
18
22
02
06
06
10
14
18
22
02
06
LT
LT
Figure 3.19 Ion drifts at Jicamarca averaged over heights from 300 to 400 km as a func-
tion of season and solar activity. Left side, observations; right side, TIEGCM simulations.
Top three panels, vertical ion drifts; bottom three panels, zonal ion drifts. Within each
panel, the different curves illustrate results for different levels of solar activity correspond-
ing to F10.7 indices of 85, 150, and 200. [After Fesen et al. (2000). Reproduced with
permission of the American Geophysical Union.]
 
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