IMPROVING THE EFFICIENCY OF A DIGITAL FILTERING SCHEME FOR DIABATIC INITIALIZATION

A method of diabatic initialization is described in which a nonrecursi ve digital filter is applied to both the backward (adiabatic) and forw ard (diabatic) steps. It has clear advantages over previously proposed schemes: the initialization requires significantly less computation t ime and the resulting changes in the analyzed fields are consistently smaller. Despite these smaller increments, the suppression of spurious high-frequency noise is at least as effective as for the earlier sche mes.