Figure 1.— Deviations from the ETE Scale, eq (1).

The circles are deviations from the fitted equation of the function F_x(P₃, T₅₈) calculated from eq (2) for each input (P₃, T₅₈) data point. The central cross-hatched area is the 95 percent prediction interval [53] for a prediction of F_x(P₃, T) from eq (1) as calculated from the ± values for a and b given in eqs (3) and (4). The outermost solid curves represent a change in F_x(P₃, T) corresponding to a 1 mdeg change in temperature and are calculated as 0.001 T(dln P₃/dT)_sat.