Figure 1: Time series of SSTs from N3.4 (top), and TNI (bottom) from 1871 to
2000. Both time series are normalized by the standard deviation , as
given. In the top panel, shading is included to show where thresholds of
0.4C are exceeded, indicating ENSO events. A low pass spline fit
highlights interdecadal variations.
, as
given. In the top panel, shading is included to show where thresholds of
0.4
C are exceeded, indicating ENSO events. A low pass spline fit
highlights interdecadal variations.