Datasets

4-month long 101-ensemble member seasonal attribution experiment (IC16) initialised on 01-November-2015 using the atmosphere-only version of SEAS5 (see Johnson et al., 2019) forced with daily ERA5 SST as in the reference experiment (R16) but with daily SST climatology over the tropical Indian Ocean.

Examples

4-month long 101-ensemble member seasonal attribution experiment (IC20) initialised on 01-November-2019 using the atmosphere-only version of SEAS5 (see Johnson et al., 2019) forced with daily ERA5 SST as in the reference experiment (R20) but with daily SST climatology over the tropical Indian Ocean.

Examples

This experiment is a prototype. It has several important limitations. It is not an ERA6 production. It has known missing components. It should not be used for any application or publication. It should be used to provide feedback to ECMWF.

Examples

This experiment is a prototype. It has several important limitations. It is not an ERA6 production. It has known missing components. It should not be used for any application or publication. It should be used to provide feedback to ECMWF.

Examples

This is a 4 month seasonal hindcast experiment with CY49R1 at TCo199 initialised from an open loop land-surface analysis (as in iwvp) except that over Eurasia values are replaced with climatological values for the initial day (calculated from the open loop the period 1993-2022)

Examples

This is a 4 month seasonal hindcast experiment with CY49R1 at TCo199 initialised from an open loop land-surface analysis (as in iwvp) except that over North America values are replaced with climatological values for the initial day (calculated from the open loop the period 1993-2022)

Examples

Coupled ensemble forecasts (60 days, 8+1 members), 1 Jan 1981-2016, IFS-CY43R3 TCo319L91, no initial perturbations, SPPT applied only in (50E-120E, 20N-20S). Twice-daily global pressure-level gridded F80 atmospheric fields.

Examples

Coupled ensemble forecasts (60 days, 50+1 members), 1 Jan 1987,1990,1995,2010,2013, IFS-CY43R3 TCo319L91, no initial perturbations, SPPT applied only in (50E-120E, 20N-20S). Twice-daily global pressure-level gridded F80 atmospheric fields.

Examples

Coupled ensemble forecasts (60 days, 8+1 members), 1 Nov 1981-2016, IFS-CY43R3 TCo319L91, no initial perturbations, SPPT applied only in (50E-120E, 20N-20S). Twice-daily global pressure-level gridded F80 atmospheric fields.

Examples

Coupled ensemble forecasts (60 days, 50+1 members), 1 Nov 2002, IFS-CY43R3 TCo319L91, no initial perturbations, SPPT applied only in (50E-120E, 20N-20S). Twice-daily global pressure-level gridded F80 atmospheric fields.

Examples

Research forecast experiment produced with ECMWF IFS cycle 47R1, at TCo399 (25km), for the EUREC4A field campaign (15.01.2020-14.02.2020). Initialized from the hfa8 analysis, in which no dropsondes are assimilated, with fields saved on model levels (bit identical to hfa8 forecasts)

Examples

Research forecast experiment produced with ECMWF IFS cycle 47R1, at TCo399 (25km), for the EUREC4A field campaign (15.01.2020-14.02.2020). Initialized from the hfff analysis, in which no dropsondes and no radiosondes are assimilated, with fields saved on model levels (bit identical to hfff forecasts)

Examples

Research forecast experiment produced with ECMWF IFS cycle 47R1, at TCo399 (25km), for the EUREC4A field campaign (15.01.2020-14.02.2020). Initialized from the hg1z analysis, with fields saved on model levels (bit identical to hg1z forecasts)

Examples

Coupled forecast with the new gravity-capillary model and nonlinear renormalisation of the growth rate in ecWAM. Tc1279 resolution (9km), from 2019-03-22 0 UTC, hourly output from step 1 to 72 hours code branch: wab_CY47R3.0_wam.IFS-1944

Examples

Coupled forecast WITHOUT the new gravity-capillary model and nonlinear renormalisation of the growth rate in ecWAM. Tc1279 resolution (9km), from 2019-03-22 0 UTC, hourly output from step 1 to 72 hours code branch: wab_CY47R3.0_wam.IFS-1944

Examples

This dataset contains atmospheric mixing ratios of carbon dioxide (CO2), methane (CH4) and carbon monoxide (CO), CO2 and CH4 fluxes at the surface, CO2 tagged tracers to monitor the atmospheric enhancement associated with anthropogenic emissions and natural fluxes, and meteorological parameters from very high resolution (9km) global simulations with the Integrated Forecasting System of the European Weather Centre for Medium Range Weather Forecasts (ECMWF).

Tropical relaxation experiment run at Tco199 for 46 days over 20 years starting on 12, 16 , 19, 23, 26 , 30 December and 2nd, 6th and 9th January 1999-2018.

Examples

Retrieving 2-meter temperature of the hindcast starting on 12 December 2019 for all perturbed members.

50-member extended-range hindcasts (46 days) targeting 2018 stratospheric sudden warming. Two initialisation dates considered: 2018-01-27 and 2018-01-31. Resolution TCo639L137. CY47R3.

Examples

Contains uncompressed IEEE-754 Standard (1985) 64-bit floating-point single-time atmospheric and wave model (long window 4Dvar) outputs for experiment version 'hplp'. Surface, and model and pressure levels are available for the atmospheric model.

Examples

Get day-one forecast of 2 metre air temperature (single level)

Uncoupled ensemble subseasonal reforecasts (ENS-U) with ocean and sea ice boundary conditions derived from observed values at initialisation time. In these experiments, SSTs are specified using daily values from the Operational Sea Surface Temperature and Ice Analysisthat are persisted as anomalies on top of a daily mean SST climatology (1979-2001) derived from the ERA40 reanalysis.

SNAPSI case study of Northern Hemisphere strong polar vortex case in the stratosphere, initialised on 2022-01-01. TCo319L137 resolution 51-member ensemble, integrated for 70 days.

Examples

SNAPSI case study of Northern Hemisphere strong polar vortex case in the stratosphere, initialised on 2022-01-01. TCo319L137 resolution 51-member ensemble, integrated for 70 days.

Examples

Seasonal forecast using CY49R2b with stochastic sea ice scheme active. Used to support the analysis in the paper titled "The impact of stochastic sea ice perturbations on seasonal forecasts" submitted to Weather and Climate Dynamics by K. Strommen, M. Mayer, J. Spaeth and S. Tietsche. Further details in the paper. This forecast can be directly compared against the control counterpart "ikh7".

Examples

Seasonal forecast using CY49R2b without any stochastic sea ice scheme active. Used to support the analysis in the paper titled "The impact of stochastic sea ice perturbations on seasonal forecasts" submitted to Weather and Climate Dynamics by K. Strommen, M. Mayer, J. Spaeth and S. Tietsche. Further details in the paper. This control forecast can be directly compared to the forecast "imsu", which has stochastic sea ice schemes turned on.

Examples

The seasonal run (Nov 2018 - Feb 2019) performed on the Oak Ridge Summit supercomputer with a 1.4 km spatial resolution and a 3 hour temporal resolution. Currently only the initial 10 steps have been published as an example, but more data is available on request. Surface fields are available for the entire time range, model level and pressure level fields are available for only the first month. Model levels 1 to 137 are available. Pressure levels 1, 2, 3, 5, 7, 10, 20, 30, 50, 70, 100, 150, 200, 250, 300, 400, 500, 700, 850, 925, 1000 are available.