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Session 7: Should we engineer the climate?

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This figure shows 6 colour coded satellite images of the amount of Ozone over the South Pole. Colours are coded from blue/purple to green to red yellow for increasing amounts of ozone. The globes are shown predominantly in green. Figure 6a is the mean for September 1979 and shows a pale blue region over Antarctica and an orange region around Antarctica. Figures 6b, c, d and f show means for September 1985, 1987, 1997 and 2015 respectively. Each has a dark blue/purple circular region around Antarctica. Figure 6e shows data for 24th September, 2006, showing the dark blue/purple region extending well beyond Antarctica, with a fringe around part of it in yellow/red.