The ECMWF Ocean Analysis System: ORA-S3

The role of ARGO temperature and salinity data in the ECMWF operational ocean analysis system

A new operational ocean analysis system (system 3 or S3) has been implemented at ECMWF. It consists of two analysis streams: (i) a historical reanalysis from 01/01/1959 which is continuosly maintained up to 11 days behind real time and is used to initialize seasonal forecasts, and (ii) an early delivery ocean analysis, produced daily in real time, used to initialize the monthly forecasts. The S...

Assimilation of altimeter data in the ECMWF ocean analysis system 3

The latest version of the ECMWF ocean analysis system was recently introduced into operational use. This not only provides initial conditions for the monthly and seasonal forecast systems but also creates a historical reanalysis. For the first time, altimeter data are used in the ECMWF operational ocean analysis. However, making good use of altimetric sea level information was not easy and seve...

Ocean Reanalyses Inter-Comparison Project (ORA-IP)

Analysis of the ECMWF Storage Landscape

Despite domain-specific digital archives are growing in number and size, there is a lack of studies describing their architectures and runtime characteristics. This paper investigates the storage landscape of the European Centre for Medium-Range Weather Forecasts (ECMWF) whose storage capacity has reached 100 PB and experiences an annual growth rate of about 45%. Out of this storage, we examine...

Tropospheric chemistry in the integrated forecasting system of ECMWF

A representation of atmospheric chemistry has been included in the Integrated Forecasting System (IFS) of the European Centre for Medium-Range Weather Forecasts (ECMWF). The new chemistry modules complement the aerosol modules of the IFS for atmospheric composition, which is named C-IFS. C-IFS for chemistry supersedes a coupled system in which chemical transport model (CTM) Model for OZone and ...