Figure 5
From: Surface Current in “Hotspot” Serves as a New and Effective Precursor for El Niño Prediction
Retrospective prediction of the July Niño 3.4 index (N 7). Annual time series of N 7 from observation (black) and prediction using (a), surface currents (U and V), (b) total WWV and (c), both surface current and western WWV. Blue, red, orange and green lines correspond to predictions with lead time of 2, 3, 4 and 5 months, respectively. Surface currents are taken from locations in the southern hotspot denoted by black squares in Fig. 2 and given in Table 1. The figure is plotted using MATLAB R2015b (http://www.mathworks.com/).
