= 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       || Update of tidal mixing (zdfiwm)                       ||
||=PI(S)        || Casimir                                               ||
||=Digest       || Update zdfiwm.F90 (internal wave driven mixing) so that it matches the most recent publication (de Lavergne et al. JAMES 2020). ||
||=Dependencies || If any                                                ||
||=Branch       || source:/NEMO/branches/2021/dev_r15388_updated_zdfiwm/ ||
||=Previewer(s) || Names                                                 ||
||=Reviewer(s)  || Names                                                 ||
||=Ticket       || #2678                                                 ||

=== Description

{{{#!box width=25em help
The current zdfiwm.F90 (internal wave driven mixing) routine was coded prior to the CMIP6 exercise, as documented in chapter 5 of my PhD thesis (​https://tel.archives-ouvertes.fr/tel-01592475). A refined version has been published since (​https://doi.org/10.1029/2020MS002065). This refined version is simpler and has been thoroughly validated against observations.
}}}

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=== Implementation

{{{#!box width=35em help
Only the zdfiwm.F90 routine is modified. \\
One namelist parameter in namzdf_iwm is removed ('nn_zpyc'). There are no new namelist parameters, but there is a new forcing file. This file is called 'zdfiwm_forcing.nc' and contains six variables to be read: power_cri, power_bot, power_nsq, power_sho, scale_cri, scale_bot.\\
}}}

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=== Documentation updates

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

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

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

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

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