This message is for users of tgcm12 and tgcm13:

A small bug has been found in dt.f: the variables
EXPT, EXPT2, and EXPTA were incorrectly implicitly
typed as reals. They should be explicitly typed
as complex (as in duv.f).

This fix results in small changes in TN and most
of the composition, mainly at the bottom boundary.
However, the magnitude of the differences are small, 
e.g., ~.1e-4%. We do not feel its necessary to repeat
previously made runs of these models.

As of today, 8/20/99, I have made this change in 
the fixed source for tgcm12 and tgcm13 
(/home/tgcm/tgcm12/dt.f and /home/tgcm/tgcm13/dt.f).
However, many of you have your own copies of dt.f
in modification directories. If so, please add the 
following line in the declarations part of dt.f 
(no other changes are necessary):

      complex :: expt,expt2,expta

This bug applies only to tgcm12 and tgcm13 (tgcm8,
tgcm22, tgcm22mt, etc are ok).

Thanks,

--Ben