The tables in this page summarise the change of horizontal resolution of the various model components to be implemented at IFS cycle 41r2

Atmospheric model

• ENS day 11 - 15 will be run at the same resolution as ENS day 0 - 10.
• The current ENS overlap data provided from day 9 to 10 is discontinued. 
• Overlap data is provided from day 14 to 15 for ENS Extended.
• The horizontal resolution of the ENS re-forecasts will be increased to match that of ENS.
• The two ENS constant-resolution forecasts provided for calibration and validation purposes are discontinued.
• There will be no change in the number and definition of the pressure levels.
• There will be no change in the model level vertical resolution.

Latitude-longitude resolutions for atmospheric products provided in dissemination

HRES

• HRES products will be available at the base grid resolution of 0.1° and multiples thereof.
• For backwards compatibility, HRES fields will also be available at the compatibility grid resolution of 0.125°.
• All product grids that can be generated from the base grid (0.1°)  will be generated from that grid.
• Those grids that cannot be generated from the base grid will be generated with the compatibility grid (0.125°).
• For example, grids of 0.5° and 1.0° will be generated from the base grid;  grids of 0.25° and 0.75° will be generated from the compatibility grid.

ENS

• ENS products will be available at the base grid resolution of 0.2°and multiples thereof.
• For backwards compatibility, ENS products from will also be available at the compatibility grid resolution of 0.25° and multiples thereof.
• All product grids that can be generated from the base grid (0.2°) will be generated from that grid.
• Those grids that cannot be generated with the base grid will be generated with the compatibility grid (0.25°).

ENS Extended

• ENS Extended products will be available at the base grid resolution of 0.4°and multiples thereof.
• For backwards compatibility, ENS Extended products from will also be available at the compatibility grid resolution of 0.5° and multiples thereof.
• All product grids that can be generated from the base grid (0.4°) will be generated from that grid.
• Those grids that cannot be generated with the base grid will be generated with the compatibility grid (0.5°).

Wave model

• HRES-SAW products will be available at the base grid resolution of 0.1° and multiples thereof.
• For backwards compatibility, HRES-SAW fields will also be available at the compatibility grid resolution of 0.125°.
• All product grids that can be generated from the base grid (0.1°)  will be generated from that grid.
• Those grids that cannot be generated from the base grid will be generated with the compatibility grid (0.125°).
• The current ENS-WAM overlap data provided from day 9 to 10 is discontinued. 
• Overlap data is provided from day 14 to 15 for ENS-WAM Extended.
• The horizontal resolution of the ENS-WAM re-forecasts will be increased to match that of ENS-WAM.
• The two ENS-WAM constant-resolution forecasts provided for calibration and validation purposes are discontinued.

Ocean model

No changes will be made to the resolution of the ocean model used in the ENS.

Summary for HRES, ENS, 4DVar, EDA, HRES-WAM, ENS-WAM, ENS-WAM Extended and HRES-SAW

The current cycle is in blue and the upgrade is in red.