[cam-users] A problem with CAM2.0.1 restart run

[Jim Rosinski]

On Wed, 10 Sep 2003, [gb2312] y ww wrote:

> I running CAM2.0.1 on Linux and the problem is as follows:
>  An initial run of one day was restarted , while another initial run with
> the same datasets was running without any interuption. I had expected that
> results of the two cases would be exactly the same. But the difference of
> monthly averaged precipitation (PRECL+PRECC) turned out to be as much as 12
> mm/day after one year of model time. I am confused. Did I do anything
> wrong? Or is it a bug of CAM2.0.1?
> Could anyone offer some advice?

Can't say for sure that you did anything wrong.  But your expectation of
identical results is correct.  Any other result is indicative of a problem.

I just tried a test run of CAM2.0.1 on Linux using pgf90.  With 2 MPI tasks,
all defaults from "configure" except setting the resolution to T5, gave
identical results after 1 and 2 months where one run was restarted after 1
day while the other ran straight through as an initial run.

Jim Rosinski