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The ECMWF OCEAN5 system is a new global eddy-permitting ocean-sea ice ensemble reanalysis analysis system. This Technical Memorandum gives a full description of the OCEAN5 system, with the focus on its Behind-Real-Time (BRT) component, the reanalysis product …
An ensemble of ten atmospheric model integrations for the years 1899 to 2009/2010. There are two versions of the ERA-20CM atmospheric model integrations. Each is comprised of a 10-member ensemble using: Radiative forcing from CMIP5 Sea-surface temperature …
ERA-20C is ECMWF's first atmospheric reanalysis of the 20th century, from 1900-2010. It assimilates observations of surface pressure and surface marine winds only. It is available on 37 pressure levels, 16 potential temperature levels, and 2 potential …
ECMWF is now running its own Artificial Intelligence Forecasting System (AIFS). The AIFS consists of a deterministic model and an ensemble model. The deterministic model has been running operationally since 25 February 2025; further details can be found on …
The CAMS reanalysis is the latest global reanalysis data set of atmospheric composition (AC) produced by the Copernicus Atmosphere Monitoring Service, consisting of 3-dimensional time-consistent AC fields, including aerosols, chemical species and greenhouse …
Copernicus Atmosphere Monitoring Service produces global atmospheric inversion for methane, carbon dioxide and nitrous oxide using the atmospheric inversion framework PyVAR. The framework uses a process called data assimilation, or flux inversion, where …
ERA5-Land is a reanalysis dataset providing a hourly high resolution information of surface variables over several decades at ~9km grid spacing and covering the period from 1950 to 5 days before the present. ERA5-Land, developed by C3S at ECMWF, has been …
 CAMS Global  atmospheric composition forecast  production system is used to produce the daily forecasts of pollutants, aerosols and greenhouse gases across the globe. Satellite observations of atmospheric composition are merged with a detailed computer …
Climate forcing, also known as Radiative Forcing, determines the change in globally-averaged temperature change due to the natural or human-induced changes to the energy budget. The climate forcing estimates of CAMS quantify the climate forcings exerted by …
The Global Fire Assimilation System (GFAS) assimilates fire radiative power (FRP) observations from satellite-based sensors to produce daily estimates of emissions from wildfires and biomass burning. FRP is a measure of the energy released by the fire and is …