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

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Table of Content Zone

Table of Contents
maxLevel1


Section

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°).

 

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Section

Wave model

 


 

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

Current
Upgrade
CurrentUpgrade
Current
Upgrade
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.
 

 

 




Section

Ocean model

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

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Section

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