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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

 


HRESENS

 Leg ALeg BLeg C
ENS 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
125°
0.
0625 (TBC)
1° and 0.125°
0.
25
25°
0.
125
2° and 0.25°
0.
5
5°
0.
125
2° and 0.25°
0.
5
5°
0.
25
4°  and 0.5°

Model Level
Vertical resolution

137137919191919191

 


  • There ENS day 11 - 15 will be no change in the number and definition of the pressure levels.There will be no change in the model level vertical resolutionrun 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 horizontal resolution of the two ENS constant-resolution forecasts provided for calibration and validation purposes will be increased:

 

 ENS calibration / validation
High resolutionLow resolution
 
Current
Upgrade
Current
Upgrade
Spectral
TL639
TCO639
TL319
TCO319
Gaussian grid
N320
O640
N160
O320
Horizontal grid resolution
~32 km
~18 km
~64 km
~36 km

Model Level
Vertical resolution

91
91
91
91

 

 

  • 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°).



 
Section

Wave model



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

Current
Upgrade
CurrentUpgrade
Section

Wave model

 

 HRESENS
Leg ALeg B / C
Current
Upgrade
CurrentUpgradeCurrentUpgrade
Latitudinal spacing of the native grid in degrees
0.25°
0.125°
0.1°0.1°0.
25
5°
0.
125
25°
0.
5
5°
0.
25
25°
0.
5
5°0.
5
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.
25
5°
0.
125
25°
0.
5
5°
0.
25
25°
0.
5
5°0.
5
5°
Frequencies
36
36
3636
30
36
25
36
2530
Directions
36
36
3636
24
36
12
36
1224

 

The configuration of the


  • HRES
stand-alone wave model (
  • -SAW products will be available at the base grid resolution of 0.1° and multiples thereof.
  • For backwards compatibility, HRES-SAW
) will be unchanged (0.1 latitudinal spacing, 11km native grid resolution and 0.125x0.125 dissemination)

 

...

  • 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 monthly extension of the ENS to 46 days.

 

...



Section

Summary for

atmospheric component of

HRES, ENS, 4DVar

and EDA 

, 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 Extended4DVarEDA
Leg ALeg B1st 2nd3rdOuter1st 2nd
128      
HRES-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
 


TL319
 
TL319
 

TL319
 









55
   50     











0.5°0.5°0.5°
50





TL399TL399
 
 







36

 
 
TCO319
      











32
 

TL639 
 












28
     










0.25°0.25°0.25°

18
TCO639
18 
TCO639
 
   




TCO639
  







16TL1279 




 
 







14
 










0.125°
    




11













0.1°
9TCO1279