Figure 3: Above: coefficient of 4th-order of the potential associated with the pdf using 242 different EOF patterns (first EOF of preindustrial run in sliding periods of 100 years) to project the preindustrial run. Horizontal axis: same as in Figure 2. Vertical axis: starting year of the period for the calculus of the EOF. Below: shows, for comparison, same data plotted in Figure 3 (i.e., using EOF calculated with the 20th-century run: EOF1).