FIGURE T31. Pressure-latitude section of the mean (top) and anomalous (bottom) zonal wind and divergent circulation over the west Pacific sector (120�E�170�E). The divergent circulation is represented by vectors of combined pressure vertical velocity and divergent meridional wind. Shading and contours denote zonal wind (m s^-1). Anomalies are departures from the 1979�95 base period monthly means.