DETERMINING THE INSTABILITY OF MESOSCALE PERTURBATIONS WITH RICHARDSON NUMBER
Gao Shouting Sun Shuqing(Institute of Atmospheric Physics, Academia Sinica)
The ageostrophic Eady model is adopted. Expanding the equations with the small parameters, we have obtained the relation between Richardson number and symmetrically baroclinie instability. If the latter is developed, the Richardson number should be decreased with increasing low-level winds. Meanwhile, it is proved that under the condition of Ri5.2, the symmetrically baroclinic instability will be developed in mesosoale perturbations.