EGU24-20507, updated on 11 Mar 2024
https://doi.org/10.5194/egusphere-egu24-20507
EGU General Assembly 2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Representation of Arctic mixed-phase clouds in the ECMWF Integrated Forecasting System during MOSAiC

Luise Schulte1,2, Linus Magnusson1, Richard Forbes1, Jonathan Day1, Vera Schemann2, and Susanne Crewell2
Luise Schulte et al.
  • 1ECMWF, Reading, UK / Bonn, Germany
  • 2University of Cologne, Cologne, Germany

Mixed-phase clouds are common in the Arctic atmospheric boundary layer and their representation is challenging for models. Recent studies suggest that the ECMWF Integrated Forecast System (IFS) shows too many cloudy periods in the Arctic in summer and generally misses the periods with clear skies, while in winter the cloudy state is underrepresented.
We use ground-based remote sensing data from the MOSAiC campaign to assess systematic errors in modelled liquid cloud water over the whole MOSAiC period and combine this with more detailed analyses of selected cases.
In addition, we perform sensitivity tests to identify ways to improve the parametrization for Arctic mixed-phase clouds in the IFS.
We run cases in the Single Column Model (SCM) version of the IFS and investigate the representativity of model sensitivities in the SCM for the 3D model.

How to cite: Schulte, L., Magnusson, L., Forbes, R., Day, J., Schemann, V., and Crewell, S.: Representation of Arctic mixed-phase clouds in the ECMWF Integrated Forecasting System during MOSAiC, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-20507, https://doi.org/10.5194/egusphere-egu24-20507, 2024.

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