\section{����������(�ǽ��С������)}

\begin{equation}
        \DP{\pi}{t} 
      + \frac{u}{a \cos \varphi} \DP{\pi}{\lambda}
      + \frac{v}{a} \DP{\pi}{\varphi}
      + \dot{\sigma} \DP{\pi}{\sigma}
   =  - \frac{1}{a \cos \varphi} \DP{u}{\lambda}
      - \frac{1}{a \cos \varphi} \DP{}{\varphi} ( v \cos \varphi)
          - \frac{\partial \dot{\sigma}}{\partial \sigma}
      - \frac{S[Pr]}{\rho},
  \label{����}
\end{equation}
\begin{eqnarray}
\label{�����}
  \DP{q}{t} + \frac{u}{a \cos \varphi} \DP{q}{\lambda}
  + \DP{v}{a} \DP{q}{\varphi} + \dot{\sigma} \DP{q}{\sigma}
  & = & \frac{q-1}{\rho} S_q,
\end{eqnarray}
\begin{equation}
  \label{u}
           \DP{u}{t} 
         + \frac{u}{a \cos \varphi} \DP{u}{\lambda}
         + \frac{v}{a} \DP{u}{\varphi}
         + \dot{\sigma} \DP{u}{\sigma}
         - f v - \frac{uv}{a} \tan \varphi
     =   - \frac{1}{a \cos \varphi} \DP{\Phi}{\lambda}
         - \frac{RT}{a \cos \varphi} \DP{\pi}{\lambda}
         + F_{\lambda},
\end{equation}
\begin{equation}
  \label{v}
           \DP{v}{t} 
         + \frac{u}{a \cos \varphi} \DP{v}{\lambda}
         + \frac{v}{a} \DP{v}{\varphi}
         + \dot{\sigma} \DP{v}{\sigma}
         + fu + \frac{u^2}{a} \tan \varphi
     =    - \frac{1}{a}  \DP{\Phi}{\varphi}
            - \frac{RT}{a}  \DP{\pi}{\varphi}
         + F_{\varphi},
\end{equation}
\begin{equation}
\label{�ſ尵}
  \frac{\partial \Phi}{\partial \sigma} = - \frac{RT}{\sigma},
\end{equation}
\begin{eqnarray}
\label{Ǯ��}
& &    \DP{T}{t} 
     + \frac{u}{a \cos \varphi} \DP{T}{\lambda}
     + \frac{v}{a} \DP{T}{\varphi}
     + \dot{\sigma} \DP{T}{\sigma}
   =   \frac{R T}{c_p}
       \left\{   \DP{\pi}{t} 
               + \frac{u}{a \cos \varphi} \DP{\pi}{\lambda}
               + \frac{v}{a} \DP{\pi}{\varphi}
               + \frac{\dot{\sigma}}{\sigma} \right\}
               + \frac{Q}{c_p}.
\end{eqnarray}


