[MITgcm-devel] MOC and forcing fields

[Dimitris Menemenlis]

Martin, a naive question: the MOC slows down relative to what?  How does one know what the actual MOC should look like?  Is that relative to the Ganachaud and Wunsch estimates?  Are there any other data-based estimates available?

I am also still waiting for instructions from you regarding latest ice dynamics solver changes.  What tests do I need to repeat and what tests are OK?  D.

Dimitris Menemenlis
cell: 818-625-6498

-----Original Message-----

From:  Martin Losch <Martin.Losch at awi.de>
Subj:  [MITgcm-devel] MOC and forcing fields
Date:  Fri Sep 21, 2007 12:11 am
Size:  1K
To:  MITgcm-devel at mitgcm.org

FYI,

I have noticed that with the CORE climatoloty and the 2deg llc grid  
the Atlantic MOC slows down considerably to
I have heard from other modellling groups that they had the same  
experience (Arne Biastoch in Kiel, Adrian New in Southampton, both  
with OPA/NEMO and at different resolutions). I asked Adrian, and he  
pointed me to the DRAKKAR project in France. The two documents  
describe this problem and the document how they modified the forcing  
fields (starting from CORE) to alleviate this problem. They have come  
up with something called DSF3 (Drakkar forcing set number 3):

Drakkar Project report, Section 4.1.3 on atmospheric forcing
http://www.ifremer.fr/lpo/treguier/drakkar/reports/2006/Drakkar- 
CRA2006-Final.pdf

technical report, section 3.2
http://www.ifremer.fr/lpo/treguier/drakkar/configs/ORCA025/ 
orca025_G70.pdf

As far as I know the Kiel-group handles this problem by massive  
restoring in the Arctic.

Martin

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