Pearson’s coefficients of correlation and the
“Student-t” statistical test are presented in Table 2 for
variables related to rainfall erosive events. Previous studies
in Brazil relating a statistical coefficient such as Pearson’s
coefficient between annual rainfall erosivity and ENSO
indicators are very rare. Lü et al. (2011), in studying monthly
rainfall and mean discharge in the headwater region of the
Yellow River, China, adopted monthly values of SST as
ENSO indicators and found significant correlations.
D’Odorico et al. (2001), in the south-west US, found a
significant coefficient of correlation between SST > 0 and
rainfall erosivity, using a similar methodology to Lü et al.
(2011).