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ESM-Tools: A common infrastructure for modular coupled earth system modelling

In order to define a standard way of downloading, configuring, compiling and running modular ESMs on a variety of HPC systems, AWI and partner institutions develop and maintain the OpenSource ESM-Tools software (https://www.esm-tools.net). Our aim is to provide standard solutions to typical problems occurring within the workflow of model simulations such as calendar operations, data postprocessing and monitoring, sanity checks, sorting and archiving of output, and script-based coupling (e.g. ice sheet models, isostatic adjustment models). The user only provides a short (30-40 lines) runscript of absolutely necessary experiment specific definitions, while the ESM-Tools execute the phases of a simulation in the correct order. A user-friendly API ensures that more experienced users have full control over each of these phases, and can easily add functionality. A GUI has been developed to provide a more intuitive approach to the modular system, and also to add a graphical overview over the available models and combinations.