\section{$B%b%G%k(B}

$B4pACJ}Dx<0$O0J2<$N<0$G$"$k(B.
\begin{equation}
  \DP{\theta }{t} = \frac{1}{\rho c_{p}}\frac{\theta }{T}Q_{rad} 
            + \frac{1}{\rho }\DP{}{z}\left(\rho K_{h}\DP{\theta }{z}\right).
  \Deqlab{$B4pACJ}Dx<0(B}
\end{equation}

$B$3$3$G(B $\theta $ $B$O290L(B, $T$ $B$O29EY(B, $K_{h}$ $B$O1tD>3H;678?t(B, $Q_{rad}$ $B$OJ|(B
$B<M$K$h$kC10LBN@Q$"$?$j$N2CG.N((B, $c_{p}$ $B$ODj05HfG.$G$"$k(B. $B$J$*Bg5$$OM}(B
$BA[5$BN$G$"$k$3$H$r2>Dj$7$F$$$k(B. 

$B$5$i$KBg5$$O@E?e05J?9U$K$"$k$H$9$k(B.
\begin{equation}
 \DP{p}{z}=-\rho g.
 \Deqlab{$B@E?e05$N<0(B}
\end{equation}

\subsection{$B3H;678?t(B}

$B3H;678?t$O(B Gierash and Goody (1968) $B$GMQ$$$i$l$?J}K!$G7W;;$9$k(B.

\begin{equation}
  K_{h} = kz^{2}\sqrt{\left|\frac{g}{\theta }\DP{\theta }{z}\right|}.
\end{equation}

$B$3$3$G(B $k=1.32$ $B$G$"$k(B(Priestley, 1959). 

\subsection{$BJ|<M2aDx(B}

$BJ|<M2aDx$O@V30J|<M$O(B CO${}_{2}$ 15 $\mu $m $B%P%s%I$N5[<}(B, $BB@M[J|<M$O(B 4.3,
2.7, 2.0 $\mu $m $B%P%s%I$N6a@V305[<}$r9MN8$9$k(B. $BJ|<M2aDx$N>\:Y$J7W;;J}K!(B
$B$OJL;f2r@b!V2P@1Bg5$$NJ|<M%b%G%k!W$r;2>H$5$l$?$$(B.

\subsection{$B82G.M"Aw(B}

$BCOI=LL$+$i$N82G.%U%i%C%/%9(B $H$ $B$NI>2A$O(B 2 $BDL$j$NJ}K!$G9T$&(B. 1 $B$D$a$O(B 
Gierash and Goody (1968) $B$GMQ$$$i$l$?J}K!$G(B,

\begin{equation}
  H = 0.089\cdot \rho c_{p} \kappa [2(T_{g} - T_{z=0})]^{\frac{4}{3}}
      \left(\frac{g}{T_{z=0}\kappa \nu}\right)^{\frac{1}{3}},
  \Deqlab{GG1968$B$N82G.%U%i%C%/%9(B}
\end{equation}

$B$H$9$k(B. $B$3$3$G(B $T_{g}$ $B$OCOI=LL29EY(B, $T_{z=0}$ $B$OCOI=5$29(B, $\kappa $ $B$O(B
$BBg5$$NG.3H;678?t(B, $\nu $ $B$OBg5$$NF0G4@-78?t$G(B, $BCM$O(B Gierash and Goody
(1968) $B$K=>$&(B($B$=$l$>$l(B 8$\times 10^{-4}$ m${}^{2}$/sec, 1$\times
10^{-3}$ m${}^{2}/sec$). $B$?$@$7COI=5$29$,COI=LL29EY$h$j$b9b$$>l9g$K$O82(B
$BG.%U%i%C%/%9$O(B 0 $B$H$9$k(B. 

2 $B$D$a$NJ}K!$G$O(B Louis (1979) $B$N%Q%i%a%?%j%<!<%7%g%s$rMQ$$$k(B. 

\begin{equation}
 H = \rho c_{p}C_{d}|U|(T_{g}-T_{z=0}).
\end{equation}
\begin{quote}
\[
  C_{d}= \left\{
\begin{array}{ll}
  C_{d0}\left( 1 -
    \frac{b\mbox{Ri}_{B}}{1+c|\mbox{Ri}_{B}|^{1/2}} \right), & 
    \mbox{Ri}_{B} < 0  \\
  C_{d0}\frac{1}{(1+b'\mbox{Ri}_{B})^{2}}, &\mbox{Ri}_{B} \geq 0
\end{array}
\right.
\]
\[
 C_{d0} = \left(\frac{k}{\ln (z/z_{0})}\right)^{2}, \; b=9.4, \; b'=4.7, 
 c=69.5C_{d}\left(\frac{z}{z_{0}}\right)^{1/2},
\]
 
\[
  \mbox{Ri}_{B} \equiv \frac{gz(\theta _{s}-\theta _
  {z=0})}{\overline{\theta }u(z)^{2}}.
\]
\end{quote}

$BCOI=IwB.(B $|U|$ $B$OE,Ev$K%Q%i%a%?%i%$%:$7$FM?$($k(B. $B;~9o(B t ($BC10L$O(B LT) $B$K$*$$$F(B

\[
   |U| = 0.5 + 15\cdot\exp \left\{ - \left(\frac{t - 15}{3}\right)^{2}\right\}
\]

\subsection{$BCOI=LL(B}

$BCOLL29EY$OG.EAF3J}Dx<0$rMQ$$$F7W;;$9$k(B. $B>\:Y$OJL;f2r@b!V2P@1COI=G.<};Y%b(B
$B%G%k!W$r;2>H$N$3$H(B.