# \#ZDF

**URL:** https://nemo-ocean.discourse.group/tag/zdf/112.md

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## [The vertical diffusion trend term has issues (utrd\_zdf/vtrd\_zdf)](https://nemo-ocean.discourse.group/t/the-vertical-diffusion-trend-term-has-issues-utrd-zdf-vtrd-zdf/1036)

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**Author:** [@corentingnt](https://nemo-ocean.discourse.group/u/corentingnt)\
**Replies:** 1\
**Last updated:** [2 July 2026 16:50 UTC](https://nemo-ocean.discourse.group/t/the-vertical-diffusion-trend-term-has-issues-utrd-zdf-vtrd-zdf/1036 "2026-07-02T16:50:44Z")

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Hi, We do this message with Véga, trainee with Julie Deshayes and myself at Locean (I am PhD student). We looked at different trends terms in the NEMO.4.0 version. We noticed an issue with utrd\_zdf and vtrd\_zdf, that se…

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## [Bug in the sign convention in the TKE OSBL scheme?](https://nemo-ocean.discourse.group/t/bug-in-the-sign-convention-in-the-tke-osbl-scheme/998)

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**Author:** [@takachanbo](https://nemo-ocean.discourse.group/u/takachanbo)\
**Replies:** 0\
**Last updated:** [6 March 2026 08:29 UTC](https://nemo-ocean.discourse.group/t/bug-in-the-sign-convention-in-the-tke-osbl-scheme/998 "2026-03-06T08:29:52Z")

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I am looking through the turbulent kinetic energy (TKE) ocean surface boundary layer (OSBL) scheme but I am having some confusions pertaining to the term associated with Kolmogorov dissipation. In the snippet of code fro…

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## [Similations with different vertical mixing schemes and without convection parameterisations](https://nemo-ocean.discourse.group/t/similations-with-different-vertical-mixing-schemes-and-without-convection-parameterisations/906)

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**Author:** [@luciag](https://nemo-ocean.discourse.group/u/luciag)\
**Replies:** 0\
**Last updated:** [30 May 2025 09:14 UTC](https://nemo-ocean.discourse.group/t/similations-with-different-vertical-mixing-schemes-and-without-convection-parameterisations/906 "2025-05-30T09:14:51Z")

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Hello everyone, I would like to perform simulations using different vertical mixing schemes, but without activating any convection parameterisations (such as EVD or MFC). I turned off all convection parameterisations an…