[MITgcm-support] [Fwd: MITgcm-support Digest, Vol 21, Issue 21]
adcroft at mit.edu
Mon Mar 28 16:06:09 EST 2005
I just ran a pickup test on your set-up without Leith. Model state is
not reproducable across pickups; based on a cursory look, it looks like
W is not the same before and after a pickup. This might be
z*/free-surface related so again let's ask J-M if it is meant to work?
Tom Haine wrote:
> Yes, I understand that no special pickup files are required for Leith.
> However, the code clearly diverges due to instability associated with
> the variable viscosity. For instance, setting:
> instead of:
> allows the picked up calculation to survive for many more steps (before
> ultimately failing again). It seems that some aspect of the internal
> model state is different when picked up. This difference seems to cause
> a rapid divergence in the Leith scheme. Any ideas?
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> MITgcm-support at mitgcm.org
Dr Alistair Adcroft http://www.mit.edu/~adcroft
MIT Climate Modeling Initiative tel: (617) 253-5938
EAPS 54-1624, 77 Massachusetts Ave, Cambridge, MA, USA
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