Articles | Volume 17, issue 4
https://doi.org/10.5194/gmd-17-1813-2024
https://doi.org/10.5194/gmd-17-1813-2024
Model evaluation paper
 | 
29 Feb 2024
Model evaluation paper |  | 29 Feb 2024

Assessment of climate biases in OpenIFS version 43r3 across model horizontal resolutions and time steps

Abhishek Savita, Joakim Kjellsson, Robin Pilch Kedzierski, Mojib Latif, Tabea Rahm, Sebastian Wahl, and Wonsun Park

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Cited articles

Athanasiadis, P. J., Ogawa, F., Omrani, N.-E., Keenlyside, N., Schiemann, R., Baker, A. J., Vidale, P. L., Bellucci, A., Ruggieri, P., and Haarsma, R.: Mitigating climate biases in the midlatitude North Atlantic by increasing model resolution: SST gradients and their relation to blocking and the jet, J. Climate, 35, 3385–3406, 2022. 
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Short summary
The OpenIFS model is used to examine the impact of horizontal resolutions (HR) and model time steps. We find that the surface wind biases over the oceans, in particular the Southern Ocean, are sensitive to the model time step and HR, with the HR having the smallest biases. When using a coarse-resolution model with a shorter time step, a similar improvement is also found. Climate biases can be reduced in the OpenIFS model at a cheaper cost by reducing the time step rather than increasing the HR. 
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