715321.fig.006a
(a)
715321.fig.006b
(b)
715321.fig.006c
(c)
715321.fig.006d
(d)
Figure 6: STA amplitude 1 images, Sahel 1982–2007 (only slopes significant at the 10% level). Changes in the amplitude of the seasonal (a) NDVI curve, (b) rainfall, (c) air temperature, and (d) surface downward solar radiation flux.