# NEMO vertical grid

**URL:** <https://nemo-ocean.discourse.group/t/nemo-vertical-grid/437>\
**Category:** Versions\
**Created:** [7 February 2023 18:20 UTC](https://nemo-ocean.discourse.group/t/nemo-vertical-grid/437 "2023-02-07T18:20:29Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![qtqw](https://avatars.discourse-cdn.com/v4/letter/q/77aa72/32.png) [@qtqw](https://nemo-ocean.discourse.group/u/qtqw)\
**Post date:** [7 February 2023 18:20 UTC](https://nemo-ocean.discourse.group/t/nemo-vertical-grid/437/1 "2023-02-07T18:20:29Z")

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I would like to create a vertical partial grid (z-coordinate - partial steps) of 75 levels with a very high resolution in the layer 30-100 m (with level thickness about 2 m).  
Which values should be used for the coefficients ppsur, ppa0, ppa1, ppkth, ppdzmin, pphmax ?  
Is there any recommendations ?

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**Author:** ![robinson](https://avatars.discourse-cdn.com/v4/letter/r/848f3c/32.png) [@robinson](https://nemo-ocean.discourse.group/u/robinson)\
**Post date:** [8 February 2023 13:29 UTC](https://nemo-ocean.discourse.group/t/nemo-vertical-grid/437/2 "2023-02-08T13:29:01Z")

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I’m not sure about the answer, but I remember one thing from experience: the difference of thickness between two neighbouring vertical cells should not exceed 10% (or even less, do check in the Nemo manual).