Download and preprocess ERA5 atmospheric forcing fields for NEMO

Requirements

Python packages:

• netCDF4
• numpy
• cdsapi

These can be installed with pip

pip install -r requirement.txt

To use ECMWF cdsapi, you'll need to create login credentials and store them in $HOME/.cdsapirc file. See the instructions.

Grid and field definitions

At the moment the downloaded fields and the target latitude, longitude grids have been hard coded in the script. See download_ecmwf_era5.py header for details.

Download data for a month

python download_ecmwf_era5.py 2014-10

Downloads a subset of global fields to monthly files.

Produces file: era5_y2014m10.nc

Download multiple months

python download_ecmwf_era5.py 2014-12 -e 2015-02

Produces files: era5_y2014m12.nc era5_y2015m01.nc era5_y2015m02.nc