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

Atmospheric model


HRESENSENS Extended

Day 0 - 10Day 11 - 15Day 16 - 46

Current
Upgrade
Current
Upgrade
Current
Upgrade
Current
Upgrade
SpectralTL1279TCO1279TL639TCO639TL319TCO639TL319
TCO319
Gaussian gridN640O1280N320
O640
N160
O640
N160O320
Horizontal grid resolution
~16 km
~9 km
~32 km
~18 km
~64 km
~18 km
~64 km
~36 km
Dissemination (LL)
0.125°
0.1° and 0.125°
0.25°
0.2° and 0.25°
0.5°
0.2° and 0.25°
0.5°
0.4°  and 0.5°

Model Level
Vertical resolution

137137919191919191


  • 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-WAMHRES-SAWENS-WAMENS-WAM Extended
Day 0 - 10Day 11 - 15Day 16 - 46

Current
Upgrade
CurrentUpgrade
Current
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CurrentUpgradeCurrentUpgrade
Latitudinal spacing of the native grid in degrees
0.25°
0.125°
0.1°0.1°0.5°
0.25°
0.5°
0.25°
0.5°0.5°
Horizontal grid resolution of the native grid~28km~14km ~11km~11km~55km~28km~55km~28km~55km~55km
Dissemination (LL)
0.25°
0.125°
0.125°0.1° and 0.125°
0.5°
0.25°
0.5°
0.25°
0.5°0.5°
Frequencies
36
36
3636
30
36
25
36
2530
Directions
36
36
3636
24
36
12
36
1224


  • 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.

Grid resolution
(km)		HRESENSENS Extended4DVarEDAHRES-WAMENS-WAMENS-WAM ExtendedHRES-SAW
LoopsLoops
Day 0 - 10Day 11 - 15Day 16 - 461st2nd3rdOuter1st2ndDay 0 - 10Day 11 - 15 Day 16 - 46
128







TL159TL159




100







TL191TL191




80



TL255TL255TL255







64

TL319TL319
TL319








55










0.5°0.5°0.5°
50





TL399TL399






36

 TCO319










32
TL639 











28









0.25°0.25°0.25°

18
TCO639TCO639



TCO639






16TL1279 




 






14









0.125°



11













0.1°
9TCO1279