An error has been identified in the "total cloud cover" data from JMA CPS2 forecasting system. The details can be found in the section "Not fixed errors" under the code E8 of our "Known issues" page
It affects all available data for that variable (daily data, monthly data and anomalies) both for real-time forecasts and hindcast dates.
Due to a bug during the data ingestion to the C3S archive the values of this parameter have been divided by 100.
