| 摘 要： | Analyses are made of all terms in the vorticity equation for the atmosphere at low latitudes by using the scale analysis theory, with the result that for synotic-scale motion the baroclinic term, i, e. the twisting term and the vorticity vertical-transport term, approximates in order to the relative-vorticity advection, divergence and β term. With intensified atmospheric disturbance ratios of the β term to others become smalte white the others stay in more or less fixed proportions between them. This statement has been confirmed by the results of 22 typhoons calculated covering a targe area in low latitudes. Besides, the baro-clinic term tor the genesis and development of 6 typhoons over 1979-1980 is calculated and the results obtained show that it has significant effect. Finally, the baroclinicity is shown not to be ignored in dealing with synoptics and dynamics of synoptic-scale systems such as typhoons and easterly waves.
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