Figure 4 March CET predictions of multiple regression model using March P, S  & C indices for period
used to develop model (1881-1970) and for 1971-2003 compared with observed March CET 1881-2003
and the model errors (observed - predicted CET).

Equation: Mar CET = 5.195 + (0.03682 x Mar P) + (0.05177 x Mar S) + (-0.01502 x Mar C) which explains 65% of variation in Mar CET.