Earth system climate reanalyses at ECMWF
Patrick Laloyaux
European Centre for Medium-Range Weather Forecasts
Wednesday, Nov 30, 2016, 2:00 pm
DSRC Room 1D403
Abstract
The European Centre for Medium-Range Weather Forecasts is a key player in the production of reanalyses for climate monitoring and research. Following the Earth system approach embraced in the new ten year strategy, a coupled assimilation system that ingests simultaneously ocean and atmospheric observations in a coupled ocean-atmosphere model has been developed. This approach has been used to produce a new coupled 20th-century reanalysis, called CERA-20C, which provides a long record of low-frequency climate variability using a consistent set of observations. An ensemble technique takes into account inevitable uncertainties in the observational record and the forecast model giving an indication of the data confidence. Preliminary results and challenges of extended climate reanalysis will be discussed.
As part of the Copernicus Climate Change Service (C3S), a new atmospheric reanalysis is in production to replace ERA-Interim. ERA5 reanalysis will span the modern observing period from 1979 onward at a horizontal resolution of 31 km. The many changes and improvements incorporated into ERA5 represent a decade of research and development in modelling and data assimilation.
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Seminar Contact: Madeline.Sturgill@noaa.gov