Use of Wind Retrievals in Regional Reanalysis
Copernicus Arctic Regional Re-Analysis (CARRA) is a regional reanalysis covering the years 1997 until present and Copernicus European Regional Re-Analysis (CERRA) is regional reanalysis covering the years 1981 until present. Both data sets are in production and are not yet completed. CARRA is produced with a non-hydrostatic mesoscale NWP model, AROME, on a grid mesh with 2.5km spacing. CERRA uses a hydrostatic model, ALADIN, with 5km horisontal resolution.
Both CARRA and CERRA analyse upper air parameters with a 3D-Var technique and use Atmospheric Motion Vectors (AMV) and scatterometer wind retrievals throughout the whole reanalysis period. Use of AMV can be done due to the availability of reprocessed data sets archived at ECMWF. For scatterometer winds, reprocessed Climate Data Records provided by EUMETSAT Satellite Application Facility on Ocean and Sea Ice are utilised.
This presentation will give an overview of the reanalysis systems and their use of AMV and scatterometer wind retrievals. Performance metrics such as forecast verification statistics and data assimilation departure statistics will also be presented.
