[MITgcm-devel] pickups: mdsio and mnc with unorthodox fields

[Martin Losch]

Well, now EVP is checked in.

The trick with EVP is that you solve/step forward equations for the  
three components of the (symmetric) stress tensor sigma. You need  
pickups for those three fields. Currently, I have only enclosed the  
writing and reading of those 3 fields with ifdef's, so that these  
fields are always written and read, when the flag SEAICE_ALLOW_EVP is  
defined, even though they only contain something other than zero,  
when the runtime flag SEAICEuseEVP is  true. This way you can run do,  
say, spinup runs with VP and write pickups and as long as  
SEAICE_ALLOW_EVP is defined, you can use these pickups for EVP runs,  
although in the begining you start with zero stress, which is not  
correct (you could in principle diagnose the stress also in VP runs),  
but since EVP is stepped often within one external time step, the  
stress should be OK after one external timestep.

Martin
On Mar 20, 2006, at 10:35 PM, Dimitris Menemenlis wrote:

> Martin, we'll need a flag of type usePickupBeforeC54.
> I can take care of that if you like.
>
> Another thing I want to understand is what do you need
> in terms of pickup for the EVP solver?  It will be
> important to be able to switch back and forth between
> EVP and VP.
>
> Dimitris
>
> -- 
> Dimitris Menemenlis <menemenlis at jpl.nasa.gov>
> Jet Propulsion Lab, California Institute of Technology
> MS 300-323, 4800 Oak Grove Dr, Pasadena CA 91109-8099
> tel: 818-354-1656;  fax: 818-393-6720
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