IFS data can be downloaded from the ECMWF MARS archive. If you have the required credentials, log in to ecgate and use the job.sh script provided in the IFS-ENS folder to obtain the files
$ sbatch job.sh 2016-12-09 12
$ sbatch job.sh 2016-12-10 00
$ sbatch job.sh 2016-12-10 12
$ sbatch job.sh 2016-12-11 00
For the forecast evaluation plot (Figure 5), additional forecasts for 18 Dec 2016 are required.
IFS-ENS/EVAL contains the scripts necessary to retrieve this data from the ECMWF archive via ecgate.
Generate a MARS request for each forecast initialization time:
$ python eval-requests.py
Submit these jobs to the cluster
$ source eval-submit
When all data has been retrieved, convert the grib files to netcdf.
$ sbatch eval-to-netcdf
Place the netcdf files into the IFS-ENS/EVAL folder.
Make sure to specify appropriate paths in the scripts first.
Data may alternatively be downloaded via the ECMWF API client after translation of the MARS request to a web API request (not provided). If you don't have access rights to operational ensemble forecast data, TIGGE offers similar data at lower vertical resolution.
ERA5 data can be downloaded from the Copernicus Climate Data Store with the provided script
$ python3 download-ERA5.py`
(call from within this directory).