Fig. 2. Results of multi-variate regression . Climate index
regression coefficients (a, b ) and the percentage of the
partial-variance explained (R2) by the combination of
the SAMΣ and lagged- Niño3.4Σ terms are
shown (c ). The purely linear trends from a univariate (no
climate indices) regression (d ) and multivariate regression
(e ) and their difference (f ) are shown. In a,
b, d, and e the hachured regions are not significantly different to
zero at 95% confidence level. Basin outlines are shown in (f )
with basin numbers given in Fig. S3.