 program is included below to help the user undertand
       the approriate calling sequence

     Diffusion of heat takes the form of mixing of the "dry static
       energy temperature", T + g*z/cp.

     Details are provided in <A HREF="vert_diff.tech.ps">vert_diff.tech.ps</A>

     
</PRE>
</A><!-- END DESCRIPTION -->
<!--------------------------------------------------------------------->
<A NAME="MODULES_USED">
<HR>
<H4>OTHER MODULES USED</H4>
<!-- BEGIN MODULES_USED -->
<PRE>

     constants_mod
    