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For completion by the Sci/Tech/Code? reviewer

Reviewer: [ Nicolas Jourdain ]

Ticket Details, Documentation and Code changes

Do you understand the area of code being altered and the reasoning why it is being altered?	YES
Do the proposed code changes correspond with the stated reason for the change?	YES
Is the in-line documentation accurate and sufficient?	YES
Do the code changes comply with NEMO coding standards?	YES
Is the Ticket documented with sufficient detail for others to understand the impact of the change?	YES
Does any corresponding external documentation require updating?	NO
If yes, which docs and have the updates been drafted?	NA
Are namelist changes required for this change?	YES
If yes, have they been done?	YES
Has a completed Ticket Summary template been appended to the ticket to aid code reviews	YES
Does this summary correspond with your understanding of the full ticket?	YES

Ticket, Documentation and Code comments

Add specific Ticket, Documentation and code comments here

Testing

Has the NVTK and other jobs been tested with this change?	NA
Have the required bit comparability tests been run?	NA
Can this change be shown to have a null impact? (if option not selected)	NA
If no, is reason for the change valid/understood?	NA
If no, ensure that the ticket details the impact this change will have on model configurations .	NA
Is this change expected to preserve all diagnostics?	NO
If no, is reason for the change valid/understood?	YES
Are there significant changes in run time/memory?	YES

Testing Comments

Tested with interactive ice-shelves (nn_isf=1) in AMU12 (regional configuration of the Amundsen Sea, 2-year simulations) with the following sets of keys : key_bdy key_trabbl key_traldf_c2d key_dynspg_flt key_dynldf_c2d key_ldfslp key_zdftke key_iomput key_mpp_mpi key_lim3 and key_bdy key_trabbl key_traldf_c2d key_dynspg_flt key_dynldf_c2d key_ldfslp key_zdftke key_iomput key_mpp_mpi key_lim3 key_tide key_diaharm and key_bdy key_trabbl key_traldf_c2d key_dynspg_ts key_dynldf_c2d key_ldfslp key_zdftke key_iomput key_mpp_mpi key_lim3

Results : increased sub-glacial mean melt-rates compared to NEMO3.6_STABLE (r5672) by a factor of 2-3. No significant melt-rate difference between filtered free surface and time-splitting.

Code Review

Do the code changes comply with NEMO coding standards?	YES
Are code changes consistent with the design of NEMO?	YES
Is the code free of unwanted TABs?	YES
Has the code been wholly (100%) produced by NEMO developers working on NEMO?	YES
If no, ensure collaboration agreement has been added to the ticket keywords

Add specific code comments or suggested alterations here.

Review Summary

Good job

Approval for the trunk

YES

The code reviewer may approve the change for the NEMO trunk when:

1. their requests/comments have been addressed satisfactorily.
2. the above check-list has been completed.

or the code reviewer may choose to reject & assign the change back to the code author.