Data for ECOMIP

This directory contains files for the EarthCARE-ORCESTRA model intercomparison project, ECOMIP. Please address queries to Robin Hogan (robin.hogan at ecmwf.int). The subdirectories are:

Support files

• jsg: Files per EarthCARE frame (=an eighth of an orbit) that define the latitude, longitude and time of the radar and lidar samples. This information is taken from the EarthCARE Joint Standard Grid (JSG) files, but we have reduced the file size drastically by not storing the vertical or across-track grid information.
• ifs_od-0001_global_analyses: global atmospheric analyses from which to initialize forecasts for the ORCESTRA cases.

ECMWF Integrated Forecasting System (IFS) forecasts underneath EarthCARE

• samples: ECMWF operational forecast data extracted under EarthCARE in the eight frames of one orbit.
• ifs_od-0001_frames: ECMWF operational 9-km forecasts extracted for all EarthCARE frames of ECOMIP. They have been grouped into uncompressed "tar" files, one per day (since the NetCDF4/HDF5 files are compressed there is no benefit from using compression). This model stream is now known as the "ensemble control" (formerly HRES). "od" and "0001" indicate the class and experiment number used in ECMWF's MARS data archiving system. The variables are extracted from the second day of the forecasts at the nearest hour to the EarthCARE frame, and include top-of-atmosphere radiative fluxes.
• ifs_mc-0001_frames: ECMWF operational CAMS 40-km forecasts. "mc" and "0001" indicate the class and experiment number used in ECMWF's MARS data archiving system. The variables are extracted from the second day of the forecasts, but since these forecasts are archived only every three hours, the data may differ in time to the EarthCARE overpass by up to 1.5 hours. The data include the prognostic aerosol mass mixing ratios and the 355-nm extinction coefficient, but do not include radiative fluxes.

ECMWF Integrated Forecasting System (IFS) forecasts for the ORCESTRA domain

• ifs_od-0001_orcestra_domain: ECMWF operational 9-km forecasts for the ORCESTRA domain every hour from 1500 to 1800 UTC on 3 September 2024.
• ifs_research-9km_orcestra_domain: ECMWF research 9-km forecasts for the ORCESTRA domain for the full day of 3 September 2024 (initialized at 0000 UTC on 2 September) every 30 minutes for the model-level data (separate files) and every 7.5 minutes for the top-of-atmosphere radiation and surface precipitation (one single file with the suffix "highfreq.h5". See a video of the top-of-atmosphere upwelling radiation.
• ifs_research-4km_orcestra_domain: ECMWF research 4.4-km forecasts for the ORCESTRA domain for the full day of 3 September 2024 (initialized at 0000 UTC on 2 September) every 30 minutes for the model-level data (separate files) and every 10 minutes for the top-of-atmosphere radiation and surface precipitation (one single file with the suffix "highfreq.h5". See a video of the top-of-atmosphere upwelling radiation.