Datasets

noAircraft experiment (other all usual observation types assimilated) for aircraft Observing System Experiment (OSE) see Ingleby et al (2021), https://doi.org/10.1029/2020GL090699 . Experiment from 2019-01-28 to 2019-04-30, control is h4qi.

Examples

noAircraftT experiment (other all usual observation types assimilated) for aircraft Observing System Experiment (OSE) see Ingleby et al (2021), https://doi.org/10.1029/2020GL090699 . Experiment from 2019-01-28 to 2019-04-30, control is h4qi.

Examples

Research analysis experiment produced with ECMWF IFS cycle 47R1, at TCo399 (25km), for the EUREC4A field campaign (15.01.2020-14.02.2020). The dropsondes launched in the campaign are denied from the data assimilation.

Examples

Retrieval of temperature and humidity from the analysis on model levels on original model grid

Analysis experiement with the IFS cycle 47R1, on a cubic horizontal grid with a 399 spectral truncature, and 137 vertical levels. The cloud sink control variable is turned off. Experiment described as TOVSCV in Massart et al. (2021). Period of interest: 1 July 2019 to 30 September 2019.

Examples

Skin temperature forecast at time 06:00Z for 1 July 2019

Analysis experiement with the IFS cycle 47R1, on a cubic horizontal grid with a 399 spectral truncature, and 137 vertical levels. The cloud sink control variable is turned off. Experiment described as TOVSCV in Massart et al. (2021). Period of interest: 1 January 2020 to 31 March 2020.

Examples

Skin temperature forecast at time 06:00Z for 1 January 2020

Research analysis experiment produced with ECMWF IFS cycle 47R1, at TCo399 (25km), for the EUREC4A field campaign (15.01.2020-14.02.2020). The dropsondes and radiosondes launched in the campaign are denied from the data assimilation.

Examples

Research analysis experiment produced with ECMWF IFS cycle 47R1, at TCo399 (25km), for the EUREC4A field campaign (15.01.2020-14.02.2020). The shallow convection momentum transport is turned off

Examples

Retrieval of temperature and humidity from the analysis on model levels on original model grid

Analysis experiement with the IFS cycle 47R1, on a cubic horizontal grid with a 399 spectral truncature, and 137 vertical levels. The skin temperature analysis for the assimilation of the radiance is realised with the augmented control variable. Experiment described as SKTACV in Massart et al.

Analysis experiement with the IFS cycle 47R1, on a cubic horizontal grid with a 399 spectral truncature, and 137 vertical levels. The skin temperature analysis for the assimilation of the radiance is realised with the augmented control variable. Experiment described as SKTACV in Massart et al.

Members 1-30 of PRIMAVERA (https://www.primavera-h2020.eu/) sensitivity experiment primWP5-coupledseaice. Configured as HighResMIP/CMIP6 ECMWF-IFS-HR experiment control-1950 ( https://doi.org/10.5194/gmd-11-3681-2018) but with sea-ice albedo set to open ocean values (i.e. 0.066). Each member is run for 15 months and initialized on January 1st by branching from years 1-30 of control-1950 (i.e. there is one year of separation in start dates for each member).

Members 1-30 of PRIMAVERA (https://www.primavera-h2020.eu/) sensitivity experiment primWP5-coupledseaice. Configured as HighResMIP/CMIP6 ECMWF-IFS-LR experiment control-1950 ( https://doi.org/10.5194/gmd-11-3681-2018) but with sea-ice albedo set to open ocean values (i.e. 0.066). Each member is run for 15 months and initialized on January 1st by branching from years 1-30 of control-1950 (i.e. there is one year of separation in start dates for each member).

Members 31-40 of PRIMAVERA (https://www.primavera-h2020.eu/) sensitivity experiment primWP5-coupledseaice. Configured as HighResMIP/CMIP6 ECMWF-IFS-HR experiment control-1950 ( https://doi.org/10.5194/gmd-11-3681-2018) but with sea-ice albedo set to open ocean values (i.e. 0.066). Each member is run for 15 months and initialized on January 1st by branching from years 31-40 of control-1950 (i.e. there is one year of separation in start dates for each member).

Members 31-40 of PRIMAVERA (https://www.primavera-h2020.eu/) sensitivity experiment primWP5-coupledseaice. Configured as HighResMIP/CMIP6 ECMWF-IFS-LR experiment control-1950 ( https://doi.org/10.5194/gmd-11-3681-2018) but with sea-ice albedo set to open ocean values (i.e. 0.066). Each member is run for 15 months and initialized on January 1st by branching from years 31-40 of control-1950 (i.e. there is one year of separation in start dates for each member).

Research analysis experiment produced with ECMWF IFS cycle 47R1, at TCo399 (25km), for the EUREC4A field campaign (15.01.2020-14.02.2020). As in the operational analysis, the radiosondes and dropsondes launched in the campaign are assimilated.

Examples

4-month long 101-ensemble member seasonal reference experiment (R98) initialised on 01-November-1997 using the atmosphere-only version of SEAS5 (see Johnson et al., 2019) forced with daily ERA5 SST.

Examples

Monthly mean Geopotential at 500 hPa

4-month long 101-ensemble member seasonal reference experiment (R16) initialised on 01-November-2015 using the atmosphere-only version of SEAS5 (see Johnson et al., 2019) forced with daily ERA5 SST.

Examples

Monthly mean Geopotential at 500 hPa

4-month long 101-ensemble member seasonal reference experiment (R20) initialised on 01-November-2019 using the atmosphere-only version of SEAS5 (see Johnson et al., 2019) forced with daily ERA5 SST.

Examples

Monthly mean Geopotential at 500 hPa

Standalone ecWAM wave model CY50R1 with altimeter wave height assimilation forced by corrected ERA5 hourly neutral 10m winds, air density, gustiness and sea ice fraction (2024-2025). Native grid is Tco1279 (9km), 36 directions, 36 frequencies. See Bidlot et al. 2026: Wave Hindcast for ERA6 Preparation and Training Data Driven Models. ECMWF Tech Memo, in preparation, 6-hourly output, many parameters.

Standalone ecWAM wave model CY50R1 with altimeter wave height assimilation forced by corrected ERA5 hourly neutral 10m winds, air density, gustiness and sea ice fraction (2026). Native grid is Tco1279 (9km), 36 directions, 36 frequencies. See Bidlot et al. 2026: Wave Hindcast for ERA6 Preparation and Training Data Driven Models. ECMWF Tech Memo, in preparation, 6-hourly output, many parameters.

Standalone ecWAM wave model CY50R1 with altimeter wave height assimilation forced by operational lwda 6-hourly stress equivalent neutral 10m winds, air density, gustiness and sea ice fraction (2016-2018). Native grid is Tco1279 (9km), 36 directions, 36 frequencies. See Bidlot et al. 2026: Wave Hindcast for ERA6 Preparation and Training Data Driven Models. ECMWF Tech Memo, in preparation, 6-hourly output, many parameters.

Standalone ecWAM wave model CY50R1 with altimeter wave height assimilation forced by operational lwda 6-hourly stress equivalent neutral 10m winds, air density, gustiness and sea ice fraction (2019-2025). Native grid is Tco1279 (9km), 36 directions, 36 frequencies. See Bidlot et al. 2019: Wave Hindcast for ERA6 Preparation and Training Data Driven Models. ECMWF Tech Memo, in preparation, 6-hourly output, many parameters.

Standalone ecWAM wave model CY50R1 with altimeter wave height assimilation forced by CY50R1 e-suites and operational lwda 6-hourly stress equivalent neutral 10m winds, air density, gustiness and sea ice fraction AND surface currents from ORAS6 (2024-05-02-2026). Native grid is Tco1279 (9km), 36 directions, 36 frequencies, current refraction. See Bidlot et al. 2026: Wave Hindcast for ERA6 Preparation and Training Data Driven Models. ECMWF Tech Memo, in preparation, 6-hourly output, many parameters.

The step=0 data from these experiments provides Tco1279 initial conditions derived from ERA5 and IFS CY48R1.1. The type=pf members include perturbations from the ERA5 EDA and singular vectors calculated using IFS CY48R1.1.

Examples

Coupled ensemble reforecasts using the ECMWF IFS cycle 47r3, configured as follows. The atmosphere is set up with 15 ensemble members, 137 model levels and run on Tco199 cubic octahedral reduced Gaussian grids. The IFS is coupled hourly to a 75-level NEMO v3.4 ocean model and an LIM2 sea ice model, both utilising the ORCA025 tripolar grid with a grid spacing of approximately 0.25 degrees. The ocean and atmosphere are fully coupled throughout the 46-day forecast, producing output every 12 hours. Fifteen reforecasts are used.

Coupled ensemble reforecasts using the ECMWF IFS cycle 47r3, configured as follows. The atmosphere is set up with 15 ensemble members, 137 model levels and run on Tco199 cubic octahedral reduced Gaussian grids. The IFS is coupled hourly to a 75-level NEMO v3.4 ocean model and an LIM2 sea ice model, both utilising the ORCA025 tripolar grid with a grid spacing of approximately 0.25 degrees. The ocean and atmosphere are fully coupled throughout the 46-day forecast, producing output every 12 hours. Fifteen reforecasts are used.