[MITgcm-support] FW: problem

[Chris Hill]

Forget to send this to support!

Chris

> -----Original Message-----
> From: Chris Hill [mailto:cnh at mit.edu] 
> Sent: Friday, October 17, 2003 1:16 PM
> To: 'Mike Spall'
> Subject: RE: problem
> 
> 
> Mike,
> 
>  Several things are possible
> 
>  1. There is an optional convective frequency parameter in 
> the input file "data" called "cAdjFreq". It controls the 
> frequency of convective mixing. It could be that this is set 
> to a dumb value. If its not set it will default to the 
> integration time step. It should be reported in the run 
> textual output.
> 
>  2. the equation of state is not what it should be. There are 
> several options in the input file "data" that control this. A 
> variable eostype sets the functional form - I'm guessing 
> linear is what you want. A variable called talpha sets the 
> thermal expansion coefficient. For linear in the ocean then 
> 2e-4 is what you need.
> 
>  If checking into the above yourself doesn't help can you 
> send you "data" settings and some of the textual (STDOUT) 
> output to mitgcm-support at mitgcm.org.
> 
> Thanks,
> 
> Chris
> 
> > -----Original Message-----
> > From: spall at whoi.edu [mailto:spall at whoi.edu] On Behalf Of Mike Spall
> > Sent: Friday, October 17, 2003 11:38 AM
> > To: cnh at mit.edu
> > Subject: problem
> > 
> > 
> > Hi Chris,
> > 
> > I am trying to get the latest version of the MIT code
> > running and am having a problem.  I am trying to do a
> > simple box model, flat bottom, forced only by restoring
> > to a linear gradient in sst.  The problem is that the
> > surface level gets colder poleward, as it should, but 
> > it does not convect with the layers below, even though
> > they are colder (no salt).  I have tried implicit diffusion, 
> > convection, and KPP and they all do the same thing.  
> > The convect subroutine applied the mixing algorithm
> > only between levels 2 and kmax, so it seems that it
> > never compared rho(2) with rho(1).  Why is that, and
> > what am I doing wrong?  This must be a simple fix,
> > but I can't find the problem.
> > 
> > Sorry to bother you with something like this, but I
> > have run out of ideas.
> > 
> > Thanks,
> > Mike
> > 
> > --
> > ==================================================
> > 
> > Michael A. Spall
> > Department of Physical Oceanography
> > W.H.O.I. MS #21
> > 360 Woods Hole Road
> > Woods Hole, MA   02543
> > 
> > mspall at whoi.edu
> > (508) 289-3342 (office)
> > (508) 457-2181 (fax)
> > 
> > =================================================
> > 
>