Abstract
Abstract. The single-column version of the shared ALADIN-HIRLAM numerical weather prediction system, called MUSC, was developed by Météo-France in the 2000s and has a growing user-base in both HIRLAM and ALADIN countries. Tools to derive the required input, to run the experiments and to handle outputs of experiments carried out using MUSC have been developed within the HARMONIE-AROME canonical model configuration of the ALADIN-HIRLAM system are described within and constitute a large portion of this paper. The paper also illustrates the usefulness of the single-column approach for testing and developing HARMONIE-AROME physical parametrizations related to cloud microphysics and radiative transfer. Study cases concerning these physical parametrizations have been included for illustration purposes.
Highlights
In a Numerical Weather Prediction (NWP) system the dynamical and physical processes are split into vertical and horizontal contributions
We describe the various tools used within HARMONIEAROME in order to run a MUSC experiment
In this paper we have focused on using the ALADIN-HIRLAM single-column model, MUSC, within the HARMONIEAROME canonical model configuration of the ALADINHIRLAM NWP system
Summary
In a Numerical Weather Prediction (NWP) system the dynamical and physical processes are split into vertical and horizontal contributions. This makes it possible to separate a column from the full, three-dimensional system to form a single-column model which retains all of the science, algorithms and software of the full model. Because the calculations are done in a single vertical column, computations are very fast. This makes such models extremely useful for testing and developing new code and physical parametrizations and for carrying out sensitivity tests. The advantages are clear for those testing and developing physical parametrizations
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