DIAGNOSIS OF DIVERGENCE IN A THREE-PARAMETER NUMERICAL PREDICTION MODEL

Abstract

The equation for the vertical velocity in a quasi-non-divergent, three-parameter model has been solved for a certain simple flow pattern. The importance of vertical variation of static stability and of the horizontal wind is discussed from the solutions. Examples showing the distribution of divergence relative to the synoptic systems are computed and compared with those obtained by other investigators. A general discussion of the factors influencing the mid-tropospheric divergence follows in section 4, and section 5 contains finally some remarks on the divergence in very long waves.