[MITgcm-support] RE: Diapycnal mixing in GM/Redi

[Alistair Adcroft]

The viertical diffusivity should act independently of GM/Redi. There is a
component of Gm/Redi that appears as a vertical diffusivity but this is
added to the diapycnal component and they are treated implicitly together.
If the values you are using aren't too small (which would then be masked by
truncation/numerical artifacts) then your results are puzzling.

A.
--
Dr Alistair Adcroft              email: Alistair.Adcroft at noaa.gov
NOAA/GFDL, Princeton University               Tel: (609) 987-5073
Forrestal Campus, U.S. Route 1, P.O. Box 308, Princeton, NJ 08542


-----Original Message-----
From: mdp1 at soc.soton.ac.uk [mailto:mdp1 at soc.soton.ac.uk] 
Sent: Tuesday, September 14, 2004 6:44 AM
To: Alistair Adcroft
Subject: Diapycnal mixing in GM/Redi


Hi there Alistair.

I am using the MIT model with the default GM/Redi scheme (Griffies skew-flux

version) as a regional model of the Indian Ocean. Can you clarify for me how

the diapycnal mixing is determined in the model? It seems to be determined 
implicitly, because any prescribed vertical mixing (Kv) seems to be ignored
- 
thus my results are independent of Kv value.  

Many thanks,

Matt Palmer



-- 
Matt Palmer 
School of Ocean and Earth Science
University of Southampton
Southampton Oceanography Centre
European Way
S014 3ZH 
United Kingdom
tel: +44 (0)23 80596130
email: mdp1 at soc.soton.ac.uk