The MR sub-region has “very strong” rainfall
erosivity potential and the PCV sub-region, a “strong”
potential. Both sub-regions present strong intra-annual
variability of rainfall erosivity, which is accentuated by
ENSO oscillations. Pearson’s correlation coefficients were
highly significant between monthly rainfall erosive
variables and
SST positive oscillations in the UGRB,
stressing the PCV sub-region, which indicates that El-Niño
episodes can produce a significant impact on rainfall
erosivity behavior. Correlations with negative SST
oscillations were also significant for the UGRB, especially
for the MR sub-region, but lesser than those obtained
when positive SST oscillations occurred.