= Name and subject of the action

Last edition: '''[[Wikinfo(changed_ts)]]''' by '''[[Wikinfo(changed_by)]]'''

The PI is responsible to closely follow the progress of the action, 
and especially to contact NEMO project manager if 
the delay on preview (or review) are longer than the 2 weeks expected.

[[PageOutline(2, , inline)]]
 
== Summary

||=Action       || MOI-02_MOI-GLS-ICE                       ||
||=PI(S)        || Bricaud Clément                          ||
||=Digest       || improve GLS    ||
||=Dependencies || no                                             ||
||=Branch       || source:/NEMO/branches/2021/dev_r14318_MOI-02_MOI-GLS-ICE/ ||
||=Previewer(s) || Names                                                 ||
||=Reviewer(s)  || Names                                                 ||
||=Ticket       || #2604                                                 ||

=== Description

- improve GLS scaling of mixing under sea-ice ( do as it is in TKE)
- add limit condition under ice shelves   


=== Implementation

==== improve GLS scaling of mixing under sea-ice ( do as it is in TKE)

4 options of scaling under sea oce are available for TKE; 

0: no scaling

1: scale with constant sea-ice thickness

2: scaling with mean sea-ice thickness

3: scaling with max sea-ice thicknesss

only one is available for GLS: scaling with constant  roughness, equivalent to CASE 1 in TKE.


- Options 0,1,3 should be addded in GLS

- As for TKE,  nn_mxlice wil be added in namelist


==== add limit condition under ice shelves   

Surface boundary condition should be modified under the ice-shelves seas:

- for TKE and psi

- for Neumann and Dirichlet conditions


=== Documentation updates

{{{#!box width=55em help
Using previous parts, define the main changes to be done in the NEMO literature 
(manuals, guide, web pages, …).
}}}

''...''

== Preview 

{{{#!box width=50em info
[[Include(wiki:Developers/DevProcess#preview_)]]
}}}

''...''

== Tests
 
The MXLICE_ORCA2.pdf​ in #2604 show some the effects of the different scaling with GLS on the reference ORCA2_ICE configuration.


{{{#!box width=50em info
[[Include(wiki:Developers/DevProcess#tests)]]
}}}

''...''

== Review

{{{#!box width=50em info
[[Include(wiki:Developers/DevProcess#review)]]
}}}

''...''