Figure 2

SESA regional DJF precipitation index from GPCC (red line) compared with two different station-based indexes: a standard average (black line) and an area weighted average (green line). The dashed line corresponds to the right axis and indicates the number of available precipitation stations for each year. The inset in the bottom right corner presents the non-linear trends obtained for the same time series. From (Gonzalez et al. 2012).