NEMO EST05 Regional Baltic Sea Model Configuration and Forcing Workflow

Description

This repository contains the configuration, run scripts, setup files, and supporting forcing structure used to prepare and execute the NEMO EST05  regional model setup. It includes the workflow for assembling run directories, preparing meteorological, runoff, and boundary inputs, linking static model assets, and launching simulations within an HPC environment. The directory structure is organized so that the main run scripts, reusable setup files, and forcing data remain separated while working together as a complete operational or replay-style modeling workflow.

This configuration is a regional NEMO setup for the Baltic Sea on an EST05 grid with a horizontal resolution of about 0.5 nautical mile, roughly 1 km. It uses atmospheric bulk forcing from ECMWF products, river runoff forcing with temperature and salinity inputs, and unstructured open boundary conditions prepared from Copernicus Marine data. The setup includes sea-ice physics through SI3, supports restart-based hot starts as well as cold starts, writes outputs through XIOS, and is arranged for HPC execution with separate preparation of meteorological, runoff, and boundary forcing before the model run.

Required Software

• NEMO ocean model executable compatible with the provided configuration  v 4.2.1
• XIOS server executable for model I/O
• Slurm workload manager
• Bash shell
• Python 3
• CDO
• NCO
• OpenMPI
• NetCDF4 and HDF5 libraries
• ECMWF MARS access tools for meteorological forcing retrieval
• copernicusmarine command-line tool for Copernicus Marine boundary data retrieval