Do you use ERA5 for research, operational activities, decision-making, education or commercial applications?
We would like to hear about your experience. This short survey aims to understand how ERA5 data are used in practice, which datasets and parameters matter most, and how future reanalysis products, services and Evaluation and Quality Control (EQC) information can better support the C3S user community.
The survey takes around 10 minutes and is open until 4 September 2026.
Your feedback will help guide future developments of ERA5 data and related C3S services.
Thank you for your contribution.
ECMWF Support
on behalf of the ECMWF EQC Survey team