Figure 3-6: Aerosol extinction at 1.02 Ám from SAGE II satellite observations
at altitudes of 6.5 to 24.5 km. The time period covered is October 1984 to late
1997, with a resolution of 3 months. Each panel indicates mean values observed
in a 20░ latitude band. The white line indicates the location of the tropopause
(extension of Plate 1 in Kent et al., 1995).