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reverse rotation

This is a somewhat odd request, but here goes...

Can anyone recommend how to get CAM to run such that the Earth rotates/spins in reverse?

I have (naively) tried tacking a negative sign on the definition of the earth's angular momentum (SHR_CONST_OMEGA) in shr_const_mod.F90, but all this did was cause the model to "blow up" after 55 timesteps.

Any guidance anyone can offer would be much appreciated!

Thanks,
Rob
 
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