- Created by Eduardo Penabad, last modified on Dec 19, 2023
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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.
Fixed issues number | Issue type | Wrong Data | Recovery period (some data could still be wrong) | Recovery Finished (all the data has been fixed) |
---|---|---|---|---|
E1. | WEB-API retrievals |
| between 2017/11/24 at 11:00 GMT and 2017/11/28 at 12:00 GMT | after 2017/11/28 at 12:00 GMT |
E2. | CDS retrievals |
| between 2019/03/12 at 11:30 GMT and 2019/03/12 at 12:05 GMT | after 2019/03/12 at 12:05 GMT |
E4.b | CDS retrievals | Monthly statistics and anomalies data are temporarily not available for the following systems and dates: UK MetOffice (system=14): November hindcasts (1993-2016) | between 2019/10/25 at 11:00 GMT and 2019/10/25 at 12:00 GMT | after 2019/10/25 at 12:00 GMT |
E3.a | CDS retrievals | Snowfall amount from CMCC-CM2-v20160423 (CMCC SPSv3) data:
| between 2019/11/07 at 11:00 GMT and 2019/11/07 at 17:00 GMT | after 2019/11/07 at 17:00 GMT |
E3.b | CDS retrievals (forms and API) & WebAPI retrievals | Snowfall amount from CMCC-CM2-v20160423 (CMCC SPSv3) data:
| between 2019/11/25 at 11:00 GMT and 2019/11/25 at 14:00 GMT | after 2019/11/25 at 14:00 GMT |
E3.c | CDS retrievals (forms and API) & WebAPI retrievals | Snowfall amount from CMCC-CM2-v20160423 (CMCC SPSv3) data:
| between 2019/11/27 at 17:00 GMT and 2019/11/27 at 18:00 GMT | after 2019/11/27 at 18:00 GMT |
E3.d | CDS retrievals (forms and API) & WebAPI retrievals | Snowfall amount from CMCC-CM2-v20160423 (CMCC SPSv3) data:
| between 2019/11/28 at 16:20 GMT and 2019/11/29 at 13:00 GMT | after 2019/11/29 at 13:00 GMT |
E4.a1 | CDS retrievals | Monthly statistics and anomalies data are temporarily not available for the following systems and dates: NCEP CFSv2: November hindcasts (1993-2016) | after 2019/12/13 at 12:00 GMT | |
E4.a2 | CDS retrievals (forms and API) | Monthly statistics and anomalies data are temporarily not available for the following systems and dates: NCEP CFSv2: October hindcasts (1993-2016) and real-time forecasts for October and November 2019 | after 2020/01/08 at 00:00 GMT | |
E7. | CDS retrievals | Missing members from CFSv2-v20110310 (NCEP CFSv2) data. It affects all data available in the high-frequency (daily/subdaily) datasets: Members with start time at 06h,12h and 18h are not being retrieved from the archive by the CDS and just members with start time at 00h are returned | between 2020/05/15 at 15:45 GMT and 2020/05/15 at 16:30 GMT | after 2020/05/15 at 16:30 GMT |
E7b. | CDS retrievals | Missing members from CFSv2-v20110310 (NCEP CFSv2) data. It affects all data available in the high-frequency (daily/subdaily) datasets: Members with start time at 06h,12h and 18h are not being retrieved from the archive by the CDS and just members with start time at 00h are returned. This issue affects retrievals done after the release of the October 2020 forecast, which happened at 12UTC on the 13th of October 2020. | after 2020/10/25 at 16:15 GMT | |
E9. | CDS retrievals | 2m dewpoint temperature from System8-v20210101 (Méteo-France System8): It affects:
Sporadic values of 1.e+20 in individual grid points on the 6-hourly original data. Note this affected a very reduced amount of grid points and time steps. This issue affects retrievals done after the release of the October hindcasts which happened on the 16th of September of 2021. | between 2021/10/12 at 12:00 GMT and 2021/10/12 at 15:30 GMT. | after 2021/10/12 at 15:30 GMT |
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
Known issue number | Centre | Forecasts or Hindcasts | Start dates(1) | Description |
---|---|---|---|---|
D1. | Met Office | Both | All | Near-surface temperatures (6-hourly and daily minimum and maximum) and dewpoint temperature are encoded as being calculated at a height of 2m. |
D2. | Met Office | Both | Hindcasts: May-Dec and January Forecasts: Sep2017 to Jan2018 | Global grid is incomplete (just 180 latitude points, between 90S and 89N) Note that additionally, in this grid all points are set at integer values of latitude/longitude |
D3. | All parameters on pressure levels are not globally complete, having "missing value indicators" in points below the orography. | |||
D4. | Météo-France (system=5) | Forecasts | All | There is an issue with the postprocessing used at origin of the lagged start dates. Only members #27 to #51 are affected having data with a time shift of 7 days (168 hours). For instance, data with date/time labelled as YYYYMM08 00h would in fact correspond to YYYYMM01 00h. |
D5. | CMCC (system=3) | Hindcasts | Years between 1993 and 1999 | There are anomalous values of SST (and associated parameters, e.g. fluxes, and vertical oceanic temperature profiles) appearing in the first hours of a very limited number of ensemble members of forecasts. The issue is caused by a bug in the oceanic perturbation generation tools used at origin to produce the ocean initial conditions. The errors/perturbations appear initially as excessively high SST values, confined to the reported hindcast years, in a limited number of grid points all in the tropical Pacific. They are very quickly dissipated by the coupled model physics and dynamics, affecting, therefore, only the first 24 hours of the forecasts at most. |
D6. | CMCC (system=3) | Both | All | There are some variables affected by a spin-up issue. This affects just some ensemble members depending on the initial conditions each member started from. Unfortunately, as the selection of the forecast members is done randomly from a bigger pool of initial conditions, there is no metadata describing this in the current service based on GRIB files stored in ECMWF's MARS archive. |
D7. | DWD | Hindcasts | All 2017 start dates | For this forecasting system, year 2017 start dates have been computed as hindcasts and not real-time forecasts. |
D8. | CMCC (system=3) | Both | All | For this forecasting system, the evaporation field is masked over the ocean (only land points are available) |
D9. | Met Office (system=12,13) | Both | All | The fractional land-sea mask doesn't match the masked (land-only or sea-only) fields. For the files affected, the land-sea mask provided was produced as the result of a 1-degree interpolation of the binary land-sea mask in the native model resolution |
Data gaps
Note: (1) See description of nominal start dates here
Known issue number | Centre | Forecasts or Hindcasts | Start dates(1) | Description | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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) 20071201: member 207 |
Data irregularities
Known issue number | Centre | Forecast or hindcast | Description | ||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
I1. | MetOffice (all systems) | Forecasts | MetOffice real-time component is designed to produce a constant number of members each start date (see Description of the C3S seasonal multi-system). In those rare occasions when the MetOffice is not able to produce some of the expected members for a given start date, the affected members will be missing. Instead of re-running precisely those missing members, the MetOffice system schedules the run on a later start date of as many additional members as they were missing. The following table records all the occurrences of this irregularity by listing the dates when some members are missing (and how many of them) and the dates when additional members were produced.
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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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