Please see the respective known issues table below for guidance and workarounds.
Amended data errors
Note: Data has been amended in the archive so all retrievals made after the completion of the recovery process (see table below) are not affected by the issues.
Not fixed data errors
The issues described in the table below have not been fixed yet
Not fixed issues number | Issue type | Wrong Data | Recovery period (some data could still be wrong) | Recovery Finished (all the data has been fixed) |
|---|---|---|---|---|
| E5a. | CDS retrievals | Pressure level variables from CMCC-CM2-v20160423 (CMCC SPSv3) data. It affects all hindcast data from the following start dates and ensemble members: March: 2013 (member 34) All variables (pressure levels and single level)from CMCC-CM2-v20160423 (CMCC SPSv3) data. It affects all hindcast data from the following start dates and ensemble members: March: 2013 (member 33) | archived (wrong) data won't be overwritten | archived (wrong) data won't be overwritten |
| E5b. | CDS retrievals | Real-time forecast data from CMCC-CM2-v20160423 (CMCC SPSv3) data. It affects anomalies calculated using the wrong data specified in E5.a, specifically: Pressure variables: March to September 2019 | archived (wrong) data won't be overwritten | archived (wrong) data won't be overwritten |
| E6. | CDS retrievals | Surface solar radiation variables from CFSv2-v20110310 (NCEP CFSv2) data. It affects:
Two variables - "surface net solar radiation" and "surface solar radiation downwards" - have been swapped with each other. This error affects the daily data and corresponding monthly statistics and anomalies. | data with a fix for the affected start dates will be provided | data with a fix for the affected start dates will be provided |
| E8. | CDS retrievals (forms and API) | Total cloud cover from JMA cps2-v20150526 (JMA/MRI-CPS2) data. 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. | archived (wrong) data won't be overwritten JMA CPS2 will be superseded by CPS3 in February 2022 | archived (wrong) data won't be overwritten JMA CPS2 will be superseded by CPS3 in February 2022 |
| E9. | CDS retrievals (forms and API) | Sea surface temperature and land surface temperature (called 'soil temperature level 1' in the CDS) from CMCC-CM2-v20191201 (CMCC SPSv3.5) data. It affects the following data for those two variables:
According to CMCC report about the issue: The problem only affects the points at the borders between the three realms (sea ice, ocean and land), and is due to a change in the land-sea or sea ice-sea mask interpolation algorithm, which was implemented in the forecasts (starting from March). | archived (wrong) data won't be overwritten | archived (wrong) data won't be overwritten |
| E10.* | CDS retrievals (forms and API) | Sea ice concentration: Météo-France System 8 hindcasts contain an error, with one ensemble member (member number=2) for the August 2004 start date. This member was initialised without sea ice: sea ice concentration recovers gradually, reaching close to climatological levels by the end of the forecast range. Note that the error in sea ice may have an impact on other variables in this member. Analysis performed by Météo-France indicates the impact on reforecast climatology is minimal (including sea-ice itself). | archived (wrong) data won't be overwritten | archived (wrong) data won't be overwritten |
(*) The affected member remains in the CDS, and was used in the hindcast climatology for the relevant sea ice concentration data and graphical products. This has a minimal impact on the statistics of the model climatology, and therefore on our real-time forecast products (with August starts). Feedback on this approach is welcome.
Data and metadata deficiencies
Data gaps
Note: (1) See description of nominal start dates here
| Known issue number | Centre | Forecasts or Hindcasts | Start dates(1) | Description | ||
|---|---|---|---|---|---|---|
| G1. | Met Office | Forecasts | 20180102 | No data is available. | ||
| G2. | Met Office | Forecasts | Nominal start dates previous to November 2018 | Monthly statistics and anomalies are just available for 50 members - specifically, the 50 members closest and previous or equal to the 1st of the nominal start month. | ||
| G3. | MetOffice | Forecasts | Nominal start dates from February to April 2018 | Parameter "Soil temperature at level 1" (GRIB/MARS paramId=139) is not available. | ||
| Hindcasts | Nominal start dates from February to April | |||||
MetOffice | Forecasts | Nominal start dates from May to December 2018 | ||||
| Hindcasts | Nominal start dates from May to December | |||||
| G4. | MetOffice (all systems) | Hindcasts | Nominal start date January 1993 | January 1993 data is not available. MetOffice system produces hindcasts from January 1993 to December 2016, and due to the way nominal start dates are assigned, January 1993 would require data from December 1992 which are not produced by the MetOffice system. | ||
| G5. | MetOffice (system=600) | Forecasts | 20210222 20210223 | No data is available. The GloSea6 forecasts initialised on 22 and 23 February were initialised with low Arctic sea ice extents. This resulted from corrupt data used in the derivation of ocean initial conditions. The sea ice largely recovers in these forecasts, but is biased low through the whole 6-month forecast compared to neighbouring days. Initial sea-ice conditions for different GloSea6 February 2021 start dates: Evolution of sea-ice fraction forecasts for different GloSea6 February 2021 start dates:
| ||
| G6. | JMA (system=3) | Forecasts | 20220102 to 20220111 | No data is available. JMA CPS3 started its operational production at JMA on the 12th January 2022 | ||
| G7. | MetOffice (system=601) | Hindcasts | 20030417 | Due to a technical issue with the acquisition at ECMWF of MetOffice data, member 106 was incomplete. To fix this in the archive the data from one member from system 600 (same forecasting system) for this start date was used to substitute member 106 | ||
| G8. | NCEP (system=2) | Forecasts | 20230522 | No data is available. | ||
| G9. | MetOffice (system=602) | Forecasts | 20230715 | Member 002 is missing. It will not be replaced. | ||
| G10. | MetOffice (system=602) | Due to a technical issue with the acquisition at ECMWF of MetOffice GloSea6 data, some data files have been lost and are not recoverable. This only affects the ocean monthly data, for everything else in the atmospheric datasets (daily, monthly and anomalies) and downstream products the affected members are available. | ||||
| Forecasts | 20230808 | Ocean (monthly) data files are missing for both member 001 and 002. | ||||
| Hindcasts | November nominal start date | Ocean (monthly) data files are missing for a set of 66 ensemble members (see below) | ||||
| December nominal start date | Ocean (monthly) data files are missing for a set of 3 ensemble members (see below) | |||||
| January nominal start date | Ocean (monthly) data files are missing for a set of 3 ensemble members (see below) |
Data irregularities
This document has been produced in the context of the Copernicus Climate Change Service (C3S).
The activities leading to these results have been contracted by the European Centre for Medium-Range Weather Forecasts, operator of C3S on behalf of the European Union (Delegation agreement signed on 11/11/2014). All information in this document is provided "as is" and no guarantee or warranty is given that the information is fit for any particular purpose.
The users thereof use the information at their sole risk and liability. For the avoidance of all doubt, the European Commission and the European Centre for Medium-Range Weather Forecasts have no liability in respect of this document, which is merely representing the author's view.
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