# Internal wave-driven mixing parameterization input fields changed

**URL:** <https://nemo-ocean.discourse.group/t/internal-wave-driven-mixing-parameterization-input-fields-changed/589>\
**Category:** v4.2.x\
**Tags:** orca\
**Created:** [15 November 2023 16:15 UTC](https://nemo-ocean.discourse.group/t/internal-wave-driven-mixing-parameterization-input-fields-changed/589 "2023-11-15T16:15:57Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![rabbit](https://avatars.discourse-cdn.com/v4/letter/r/919ad9/32.png) [@rabbit](https://nemo-ocean.discourse.group/u/rabbit)\
**Post date:** [15 November 2023 16:15 UTC](https://nemo-ocean.discourse.group/t/internal-wave-driven-mixing-parameterization-input-fields-changed/589/1 "2023-11-15T16:15:57Z")

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Tidal mixing parameterization (activated with ln\_zdfiwm = .true.; input files prescribed in &namzdf\_iwm) has been reworked in v4.2. In previous versions it required 5 input fields (usually provided as 5 NetCDF files: mixing\_power\_bot.nc, mixing\_power\_pyc.nc, mixing\_power\_cri.nc, decay\_scale\_bot.nc and decay\_scale\_cri.nc)

However, looking at the namelist now (&namzdf\_iwm) I see that it requires 6 input fields now. 4 fields stayed the same but instead of mixing\_power\_pyc.nc (supplemented with parameter nn\_zpyc) it is 2 fields now mixing\_power\_nsq.nc and mixing\_power\_sho.nc (parameter nn\_zpyc) was removed. This was implemented here: [2021WP/PHY-01\_deLavergne\_tidal\_mixing – NEMO](https://forge.ipsl.jussieu.fr/nemo/wiki/2021WP/PHY-01_deLavergne_tidal_mixing)

The problem is that correspoinding inputs are not provided. Reference inputs at zenodo ([NEMO Reference configurations inputs](https://zenodo.org/records/3767939)) _ORCA2\_ICE\_v4.2.tar_ contain only the old 5 input files. Where can one get new input files?

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<div class="post-metadata">

**Author:** ![rabbit](https://avatars.discourse-cdn.com/v4/letter/r/919ad9/32.png) [@rabbit](https://nemo-ocean.discourse.group/u/rabbit)\
**Post date:** [15 November 2023 16:18 UTC](https://nemo-ocean.discourse.group/t/internal-wave-driven-mixing-parameterization-input-fields-changed/589/2 "2023-11-15T16:18:47Z")

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@Guillaume_Mercator, you were the only person who seems to be making changes in v4.2.1 related to that: [import commits from dev\_r15388\_updated\_zdfiwm SVN branch (!10) · Merge requests · NEMO Workspace / Nemo · GitLab](https://forge.nemo-ocean.eu/nemo/nemo/-/merge_requests/10#note_124)

I hope you could comment. Thank you in advance!

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**Author:** ![acc](https://avatars.discourse-cdn.com/v4/letter/a/b38774/32.png) [@acc](https://nemo-ocean.discourse.group/u/acc)\
**Post date:** [16 November 2023 12:18 UTC](https://nemo-ocean.discourse.group/t/internal-wave-driven-mixing-parameterization-input-fields-changed/589/3 "2023-11-16T12:18:45Z")

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The input fields for SETTE are now delivered through the [sette\_inputs site](https://gws-access.jasmin.ac.uk/public/nemo/sette_inputs/). You can find the appropriate ORCA2\_ICE\_v4.2.0.tar.gz file there.

This site is also referenced in the [user guide](https://sites.nemo-ocean.io/user-guide/sette.html#obtaining-configuration-input-files)