Same as Fig. A.1, but comparing the individual contribution of the shallow heating and deep crustal heating to that of the basic model. The solid line shows model 1, in which both deep crustal heating and shallow heating are assumed to be active. The dashed-dotted curves show the results of model 7, in which only deep crustal heating is assumed to be active (and shallow heating is inactive), and the dotted curves represent model 8, in which deep crustal heating is deactivated and only the shallow heating process takes place.