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Author : Clément BRICAUD

ticket : #704

Branch :


Add the EVP rheology ( from LIM3 ) in LIM2. EVP will be the standard rheology for LIM2 and VP will have to be activated by CPP key lim2_vp . Now, in limdyn_2.F90 , we call limrhg.F90 or ( with lim2_vp CPP key) we call limrhg_2.F90 .


Testing could consider (where appropriate) other configurations in addition to NVTK].

NVTK Tested'''YES'''
Other model configurations'''YES'''
Processor configurations tested[ 1*2 , 2*1 , 2*2 ]
If adding new functionality please confirm that the
New code doesn't change results when it is switched off
and ''works'' when switched on

(Answering UNSURE is likely to generate further questions from reviewers.)

The new functionality (EVP rheology) is now the standard one, the old functionality ( VP rheology) is optional: key_lim2_vp .

Bit Comparability

Does this change preserve answers in your tested standard configurations (to the last bit) ?'''YES '''
Does this change bit compare across various processor configurations. (1xM, Nx1 and MxN are recommended)'''YES'''

The NEMO_3.2 ORCA2_LIM ( with LIM2 VP) configuration is not reproductible, but NEMO_3.2 ORCA2_LIM with EVp is reproductible.

Is this change expected to preserve answers in all possible model configurations?'''NO'''
Is this change expected to preserve all diagnostics?
,,''Preserving answers in model runs does not necessarily imply preserved diagnostics. ''

If you answered '''NO''' to any of the above, please provide further details:

To preserve answers and to preserve all diagnostics, you just have to compile with key_lim2_vp.

System Changes

Does your change alter namelists?'''NO '''
Does your change require a change in compiler options?'''NO '''


''Please ''summarize'' any changes in runtime or memory use caused by this change……''

There is no significative change of runtime and memory.

IPR issues

Has the code been wholly (100%) produced by NEMO developers staff working exclusively on NEMO?'''YES/ NO '''

EVP has been pluged in LIM2 by NEMO developers staff. But EVP is coming from LIM3.

Vp and EVP and the effects on ORCA2-LIM2 are described in : Bouillon, S., M. A. Morales Maqueda, V. Legat and T. Fichefet (2009). An Elastic-Viscous-Plastic Sea Ice Model formulated on Arakawa B and C Grids, Ocean Modelling, 27, 174-184, doi:10.1016/j.ocemod.2009.01.004

Last modified 10 years ago Last modified on 2010-09-24T16:12:58+02:00