摘要 : <正> Ⅰ. INTRODUCTION It is not clear now what relationship exists between mass and stream fields in the Tropics where the primitive equation has been used in almost all numerical prediction models. This equation, however, is very... 展开 <正> Ⅰ. INTRODUCTION It is not clear now what relationship exists between mass and stream fields in the Tropics where the primitive equation has been used in almost all numerical prediction models. This equation, however, is very sensitive to the initial value, and small-scale disturbances produced by observational errors as well as the waves with small amplitude which is not important for weather are easily amplified. Of course, some small- 收起