一个简单的二层模式及其推广

A SIMPLE TWO-LAYER MODEL AND ITS EXTENSION

中文摘要:

      在某些近似下,作者推导了一组闭合的预告500mb高度和500mb与某等压面之间的厚度的方程式;把它推广,作者还求出了一组预告三层等压面高度的方程式.和Sawyer等人^**的作法不同,在推导过程中,垂直速度随高度的分布未加以规定.这些方程式可以用电子计算机计算,也适合于图解计算,在业务工作中可以应用.在本文中作者还论证了空间平均场的準恒定性,并提出了选取边界条件的几种方法.

英文摘要:

      A two-layer model both applicable to graphical integration and numerical computation is proposed. From this model the height of 500 mb surface and the thickness between a certain selected isobaric surface in the vicinity of the top of friction layer and 500 mb surface can be forecasted. An extended model involving three layers is also designed. In designing them, no prescription with regard to the distribution of vertical velocity is made.Finally, the steadiness of space mean velocity field and the selection of lateral boundary conditions are discussed.