Equations are solved for a group of latitude rows within the memory window. The group may be as few as one22.4 or as many as (jmt-2)latitudes22.5. The number of groups depends on the size of the memory window and each group is solved one at a time until all groups have been solved. The northward movement of the memory window is described in Section 11.3.1. The reader is referred to Chapter 14 for a description of the variables, Chapter 16 for a description of the grid system, and Chapter 11 for a description of the memory window.
The number of memory window moves needed to solve all latitude rows is controlled by a ``do loop'' which essentially extends from Section 22.2 to Section 22.10. The subroutines called for each group of latitudes within the memory window are outlined in Figure 22.1 and explained in the following sections.