3.0
40
2.5
35
30
2.0
25
20
-60
-40
-20
0
20
Latitude
40
60
Solar Amplitude (2 Terms)
50
Altitude (km)
45
Percent of Mean
Altitude (km)
45
1.5
1.0
40
35
0.5
30
25
20
-60
0.0
-40
-20
0
20
Latitude
40
60
Figure 8. Amplitude of oscillation of the solar term as a percentage of the local mean for the use of
one and two solar proxy terms while including a volcanic term. Contour lines are plotted at intervals
of 0.5%.
37
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Solar Amplitude (1 Term)
50