(a)

(b)

(c)

(d)

Figure 3: Per-pixel linear trend analysis Sahel 1982–2007 of (a) GIMMS NDVI anomalies, (b) CMAP rainfall anomalies, (c) NCEP GHCN/CAMS gridded air temperature, and (d) NCEP-DOE gridded surface downward solar radiation flux anomalies. Anomalies are with respect to the 1982–2007 average.