Figure 2
From: Streamflow variations across the Andes (18°–55°S) during the instrumental era
(A) Above: Map of the loadings of the first principal component (PC1) derived from 48 mean monthly streamflow series over the April 1986 – March 2016 period. The percentage of total variance accounted for by this component is shown in parentheses. The lower diagram portrays the monthly variations in surface runoff (expressed as percentages of the annual totals) for the stations with PC loadings >0.7 identified in the map above (i.e. those with dark red circles). The month 1 = January, 2 = February, 3 = March, etc. (B–D) Same as A, but for PC2, PC3, and PC4, respectively.
