To come back to the upper stage

MONOPROCESSOR INTERPOLATIONS

Results of the bilinear, bicubic and conservative interpolations for the coupling of ocean-atmosphere models with OASIS4 :
1- exchange of a coupling field between the LMDz atmosphere grid and the ORCA2 ocean grid used
by the IPSL institute (Institut Pierre Simon Laplace).
2- exchange of a coupling field between the (ARPEGE RED grid (global) and ALADIN grid (regional)) for the atmosphere
and the (ORCA2 grid (global) and NEMO-MED1/2 (regional) grid) for the ocean. These grids are used by  Météo-France .

The results are presented in the table below. For each couple of grids, different interpolations are tested.
The interpolated field correponds to the analytical function f1 :

 
For each interpolation, the source field, the target field and the error field are presented. The points at -3 correspond to the masked points.
The points at -1 correspond to points in the target field that do not receive any value, the target field beeing initialized at -1.
The blank values that can be visible in some target fields are points at PSMILe_undef=-280177 (no extra-search available for conservative
interpolations). 

LOW RESOLUTIONS : ORCA = 182x149x1 ; ARPEGE RED (BT42) =  6232x1 ; MED = 188x88x1 ; ALADIN = 117x69x1 ; LMDZ = 96x72x1

   Interpolations
Couples                            
of
Grids
BILINEAR INTERPOLATION  2D 
BICUBIC INTERPOLATION   2D

bicubic = sixteen   
BICUBIC INTERPOLATION   2D

bicubic = gradient
 CONSERVATIVE INTERPOLATION  2D
ORCA2 T / ARPEGE RED (= BT42) (M-F)
 f1

f1
ORCA2 T / ALADIN 50kms (M-F)
 f1

 f1
ORCA2 T / LMDZ (IPSL)
 f1

 f1
ORCA2 U / ARPEGE RED (= BT42) (M-F)
f1
 f1
ORCA2 U / ALADIN 50kms (M-F)
f1
 f1
ORCA2 V / ARPEGE RED (= BT42) (M-F)
f1
 f1
ORCA2 V / ALADIN 50kms (M-F)
f1
 f1
ARPEGE RED (= BT42)/ ORCA2 T (M-F)
 f1

f1
ARPEGE RED (= BT42)/ ORCA2 U (M-F)
f1

ARPEGE RED (= BT42)/ ORCA2 V (M-F)
f1

ALADIN 50kms / MED1/2 T (M-F)
 f1

f1
ALADIN 50kms / MED1/2 U (M-F)
f1
 f1
ALADIN 50kms / MED1/2 V (M-F)
f1
 f1
LMDZ / ORCA2 T  (IPSL)


f1
LMDZ / ORCA2 U  (IPSL)
f1
 f1
LMDZ / ORCA2 V  (IPSL)
f1
 f1