Weather and Climate Dynamics
Weather and Climate Dynamics
WCD
Articles | Volume 6, issue 4
Articles | Volume 6, issue 4
https://doi.org/10.5194/wcd-6-1605-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wcd-6-1605-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 6, issue 4
Research article
 | 
28 Nov 2025
Research article |  | 28 Nov 2025

An extensive investigation of the ability of the ICOLMDZ model to simulate a katabatic wind event in Antarctica

Valentin Wiener, Étienne Vignon, Thomas Caton Harrison, Christophe Genthon, Felipe Toledo, Guylaine Canut-Rocafort, Yann Meurdesoif, and Alexis Berne

Data sets

D-47 Automatic Weather Station, 2023 quality-controlled observational data AMRDC https://doi.org/10.48567/4ed8-bq91

Wind and turbulence data from the AWACA-D18 meteorological tower during a case study Valentin Wiener https://doi.org/10.5281/zenodo.17589488

ERA5 hourly data on single levels from 1940 to present Copernicus Climate Change Service, Climate Data Store https://doi.org/10.24381/cds.adbb2d47

Interactive computing environment

Processing code sonic Valentin Wiener and Guylaine Canut https://gitlab.in2p3.fr/valentin.wiener/processing-code-sonic

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Short summary
Katabatic winds are a key feature of the climate of Antarctica, but substantial biases remain in their representation in atmospheric models. This study investigates a katabatic wind event in an atmospheric circulation model using in-situ observations. The framework allows to disentangle which part of the bias is due to horizontal resolution, to parameter calibration and to structural deficiencies in the model. We underline in particular the need to refine the physics of the model snow cover.
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