Fig 2. Monthly mean SST (°C) a) at Puerto Chicama, b) in the Niño 1+2 region (reference level of 25°C indicated with a dashed black line), and c) Piura River discharge (m³/s) for the 1981–2010 climatology (black dotted) and during the El Niño events of 1925 (green dashed and crosses), 1983 (red short-long dashed and circles), 1997 (blue dot-dashed and filled circles) and 2017 (purple solid and squares).

(Self-elaboration 2021 based on NOAA, JISAO, IMARPE, Takahashi and Martínez 2017, ANA, PECHP, SENAMHI).