715321.fig.007a
(a)
715321.fig.007b
(b)
715321.fig.007c
(c)
715321.fig.007d
(d)
Figure 7: STA phase 1 images, Sahel 1982–2007 (only slopes significant at the 10% level). Changes in the phase of the seasonal (a) NDVI curve, (b) rainfall, (c) air temperature, and (d) surface downward solar radiation flux.