Geoscientific Model Development
Geoscientific Model Development
GMD
Articles | Volume 19, issue 11
Articles | Volume 19, issue 11
https://doi.org/10.5194/gmd-19-5139-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-19-5139-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 11
Development and technical paper
 | 
15 Jun 2026
Development and technical paper |  | 15 Jun 2026

A local terrain smoothing approach for stabilizing microscale and high-resolution mesoscale simulations: a case study using FastEddy® (v3.0) and WRF (v4.6.0)

Eloisa Raluy-López, Domingo Muñoz-Esparza, and Juan Pedro Montávez

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Short summary
High-resolution atmospheric simulations can become numerically unstable over steep terrain. Traditional terrain smoothing approaches modify the domain globally, reducing terrain detail. We developed a local smoothing method that improves simulation stability while only modifying steep-slope points, helping to retain the benefits of high-resolution modeling. Tested in a mesoscale and a microscale atmospheric model, it is computationally efficient, easy to implement, and adaptable to other models.
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