# Convert ERA5 pressure levels data to model levels with hybrid coordinate

**URL:** <https://forum.ecmwf.int/t/convert-era5-pressure-levels-data-to-model-levels-with-hybrid-coordinate/1281>\
**Category:** C3S - Datasets and Usage\
**Tags:** c3s, conversion, era5\
**Created:** [13 September 2023 01:27 UTC](https://forum.ecmwf.int/t/convert-era5-pressure-levels-data-to-model-levels-with-hybrid-coordinate/1281 "2023-09-13T01:27:40Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Delei\_Li](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/d/47e85d/32.png) [@Delei\_Li](https://forum.ecmwf.int/u/Delei_Li)\
**Post date:** [13 September 2023 01:27 UTC](https://forum.ecmwf.int/t/convert-era5-pressure-levels-data-to-model-levels-with-hybrid-coordinate/1281/1 "2023-09-13T01:27:40Z")

</div>

Dear all,

I am downscaling ERA5 reanalysis to higher resolution by using the CCLM regional climate model for the latest month (August. 2023- ). &nbsp;Since only pressure vertical coordinate (37 levels) from ERA5 are available for latest month (the model levels data with hybrid coordiante are three month delayed generally), I need to convert the pressure level datas to hybrid coordiante, which is required for driving CCLM.&nbsp;

Does anyone know how to do it? Do I need to consider the topography when we making the conversion? Is it possible to kindly share your scripts for the converting if it is available?&nbsp; Furthermore, I noticed that there is a function pres2hybrid from NCL ([https://www.ncl.ucar.edu/Document/Functions/Built-in/pres2hybrid.shtml](https://www.ncl.ucar.edu/Document/Functions/Built-in/pres2hybrid.shtml)), maybe it works? (not sure, I am trying ...)&nbsp;

Any help on this matter will be highly appreciated. &nbsp;

Best regards,

Delei