ECMWF IFS High-Resolution Operational Forecasts

ECMWF has implemented a significant resolution upgrade and methodology for high-resolution forecasts (HRES) and ensemble forecasts (ENS) beginning January of 2016. HRES is now performed via a transform grid with a nominal grid point spacing of 9 kilometers (0.08 degrees), and is carried out with IFS (Integrated Forecast System). Improvements in computational efficiency and effective resolution have been brought about by implementing a triangular cubic octahedral reduced Gaussian grid in which the shortest spatial wavelength is represented by at least four grid points anywhere on the globe, as opposed to the former linear arrangement whereby the shortest wavelength was represented by two grid points, while at the same time retaining the same number of spherical harmonics and triangular truncation. (The term "cubic" is due to the ability of the grid to represent cubic products in the dynamical equations.) In addition, the reduction of grid points along latitude circles as one approaches the poles is achieved using a triangular to octahedral mapping which corresponds to a poleward reduction of four points per latitude circle and an optimization of the total number of grid points and their local mesh resolution. ECMWF has documented superior filtering properties at higher resolution, an improved representation of orography, improved global mass conservation properties, substantial efficiency gains, and more scalable locally compact computations of derivatives and other properties that depend on nearest-neighbor information only. More details may be found in the publications cited below.

NCAR's DECS is performing and supplying a grid transformed version of HRES IFS, in which variables originally represented as spectral coefficients or archived on a reduced Gaussian grid are transformed to a regular 5120 longitude by 2560 latitude N1280 Gaussian grid. In addition, DECS is also computing horizontal winds (u-component, v-component) from spectral vorticity and divergence where these are available.

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Questions? Email Resource Support Contact:

  • Dave Stepaniak
    davestep@ucar.edu
    UCAR/NCAR - Research Data Archive

Temporal Range

  • Begin:  2016-01-01T00:00:00Z
    End:  2024-11-17T18:00:00Z

Keywords

Resource Type dataset
Temporal Range Begin 2016-01-01T00:00:00Z
Temporal Range End 2024-11-17T18:00:00Z
Temporal Resolution N/A
Bounding Box North Lat 89.946
Bounding Box South Lat -89.946
Bounding Box West Long -180
Bounding Box East Long 180
Spatial Representation grid
Spatial Resolution 0.07 degree
Related Links

Related Resource #1 : Tool to convert NetCDF data to WRF Intermediate file format
Additional Information N/A
Resource Format NetCDF4 (Binary)
WMO_GRIB1 (Binary)
Standardized Resource Format GRIB
NetCDF
Asset Size 133483529 MB
Legal Constraints

There are no restrictions.
Access Constraints There are no restrictions.
Software Implementation Language N/A

Resource Support Name Dave Stepaniak
Resource Support Email davestep@ucar.edu
Resource Support Organization UCAR/NCAR - Research Data Archive
Distributor NCAR Research Data Archive
Metadata Contact Name N/A
Metadata Contact Email rdahelp@ucar.edu
Metadata Contact Organization NCAR Research Data Archive

Author European Centre for Medium-Range Weather Forecasts
Publisher Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory
Publication Date 2016-06-20
Digital Object Identifier (DOI) https://doi.org/10.5065/D68050ZV
Alternate Identifier d113001
Resource Version N/A
Topic Category climatologyMeteorologyAtmosphere
Progress onGoing
Metadata Date 2024-11-18T16:05:02Z
Metadata Record Identifier edu.ucar.rda::d113001
Metadata Language eng; USA
Suggested Citation European Centre for Medium-Range Weather Forecasts. (2016). ECMWF IFS High-Resolution Operational Forecasts. Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory. https://doi.org/10.5065/D68050ZV. Accessed 20 November 2024.

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