diff --git a/src/MNH/turb_hor_dyn_corr.f90 b/src/MNH/turb_hor_dyn_corr.f90
index 813cf6347fc6b2e6fc781a463aca5d877d759149..01ee3ad898e99ca1a2b5cf899ac97823218c3966 100644
--- a/src/MNH/turb_hor_dyn_corr.f90
+++ b/src/MNH/turb_hor_dyn_corr.f90
@@ -613,14 +613,16 @@ ZFLX(:,:,IKB-1) =                                                            &
       PVSLOPEM(:,:) * PCOSSLOPE(:,:)    * PSINSLOPE(:,:) * ZDIRSINZW(:,:)    &
     - PUSLOPEM(:,:) * PCOSSLOPE(:,:)**2 * ZDIRSINZW(:,:) * PDIRCOSZW(:,:)    )
 #else
-ZFLX(:,:,IKB-1) =                                                             &
-        PTAU11M(:,:) * BR_P2(PCOSSLOPE(:,:)) * BR_P2(PDIRCOSZW(:,:))          &
-  -2. * PTAU12M(:,:) * PCOSSLOPE(:,:)* PSINSLOPE(:,:) * PDIRCOSZW(:,:)        &
-  +     PTAU22M(:,:) * BR_P2(PSINSLOPE(:,:))                                  &
-  +     PTAU33M(:,:) * BR_P2(PCOSSLOPE(:,:)) * BR_P2(ZDIRSINZW(:,:))          &
-  +2. * PCDUEFF(:,:) *      (                                                 &
-      PVSLOPEM(:,:) * PCOSSLOPE(:,:)    * PSINSLOPE(:,:) * ZDIRSINZW(:,:)     &
-    - PUSLOPEM(:,:) * BR_P2(PCOSSLOPE(:,:)) * ZDIRSINZW(:,:) * PDIRCOSZW(:,:) )
+DO CONCURRENT ( JI=1:JIU,JJ=1:JJU )
+ZFLX(JI,JJ,IKB-1) =                                                             &
+        PTAU11M(JI,JJ) * BR_P2(PCOSSLOPE(JI,JJ)) * BR_P2(PDIRCOSZW(JI,JJ))          &
+  -2. * PTAU12M(JI,JJ) * PCOSSLOPE(JI,JJ)* PSINSLOPE(JI,JJ) * PDIRCOSZW(JI,JJ)        &
+  +     PTAU22M(JI,JJ) * BR_P2(PSINSLOPE(JI,JJ))                                  &
+  +     PTAU33M(JI,JJ) * BR_P2(PCOSSLOPE(JI,JJ)) * BR_P2(ZDIRSINZW(JI,JJ))          &
+  +2. * PCDUEFF(JI,JJ) *      (                                                 &
+      PVSLOPEM(JI,JJ) * PCOSSLOPE(JI,JJ)    * PSINSLOPE(JI,JJ) * ZDIRSINZW(JI,JJ)     &
+      - PUSLOPEM(JI,JJ) * BR_P2(PCOSSLOPE(JI,JJ)) * ZDIRSINZW(JI,JJ) * PDIRCOSZW(JI,JJ) )
+END DO ! CONCURRENT
 #endif
 !$acc end kernels
 ! 
@@ -827,14 +829,16 @@ ZFLX(:,:,IKB-1) =                                                            &
       PUSLOPEM(:,:) * PSINSLOPE(:,:)**2 * ZDIRSINZW(:,:) * PDIRCOSZW(:,:)    &
     + PVSLOPEM(:,:) * PCOSSLOPE(:,:)    * PSINSLOPE(:,:) * ZDIRSINZW(:,:)    )
 #else
-ZFLX(:,:,IKB-1) =                                                             &
-        PTAU11M(:,:) * BR_P2(PSINSLOPE(:,:)) * BR_P2(PDIRCOSZW(:,:))          &
-  +2. * PTAU12M(:,:) * PCOSSLOPE(:,:)* PSINSLOPE(:,:) * PDIRCOSZW(:,:)        &
-  +     PTAU22M(:,:) * BR_P2(PCOSSLOPE(:,:))                                  &
-  +     PTAU33M(:,:) * BR_P2(PSINSLOPE(:,:)) * BR_P2(ZDIRSINZW(:,:))          &
-  -2. * PCDUEFF(:,:)*       (                                                 &
-      PUSLOPEM(:,:) * BR_P2(PSINSLOPE(:,:)) * ZDIRSINZW(:,:) * PDIRCOSZW(:,:) &
-    + PVSLOPEM(:,:) * PCOSSLOPE(:,:)    * PSINSLOPE(:,:) * ZDIRSINZW(:,:)     )
+DO CONCURRENT ( JI=1:JIU,JJ=1:JJU )
+ZFLX(JI,JJ,IKB-1) =                                                             &
+        PTAU11M(JI,JJ) * BR_P2(PSINSLOPE(JI,JJ)) * BR_P2(PDIRCOSZW(JI,JJ))          &
+  +2. * PTAU12M(JI,JJ) * PCOSSLOPE(JI,JJ)* PSINSLOPE(JI,JJ) * PDIRCOSZW(JI,JJ)        &
+  +     PTAU22M(JI,JJ) * BR_P2(PCOSSLOPE(JI,JJ))                                  &
+  +     PTAU33M(JI,JJ) * BR_P2(PSINSLOPE(JI,JJ)) * BR_P2(ZDIRSINZW(JI,JJ))          &
+  -2. * PCDUEFF(JI,JJ)*       (                                                 &
+      PUSLOPEM(JI,JJ) * BR_P2(PSINSLOPE(JI,JJ)) * ZDIRSINZW(JI,JJ) * PDIRCOSZW(JI,JJ) &
+      + PVSLOPEM(JI,JJ) * PCOSSLOPE(JI,JJ)    * PSINSLOPE(JI,JJ) * ZDIRSINZW(JI,JJ)     )
+END DO ! CONCURRENT
 #endif
 !$acc end kernels
 ! 
@@ -1029,15 +1033,19 @@ ZFLX(:,:,IKB)   = (2./3.) * PTKEM(:,:,IKB)                           &
 !  (-2./3.) * PTP(:,:,IKB:IKB)
 ! extrapolates this flux under the ground with the surface flux
 !$acc kernels async(3)
-ZFLX(:,:,IKB-1) =                                                     &
 #ifndef MNH_BITREP
+ZFLX(:,:,IKB-1) = &    
         PTAU11M(:,:) * ZDIRSINZW(:,:)**2                                &
   +     PTAU33M(:,:) * PDIRCOSZW(:,:)**2                                &
+  +2. * PCDUEFF(:,:)* PUSLOPEM(:,:)  * ZDIRSINZW(:,:) * PDIRCOSZW(:,:)
 #else
-        PTAU11M(:,:) * BR_P2(ZDIRSINZW(:,:))                                &
-  +     PTAU33M(:,:) * BR_P2(PDIRCOSZW(:,:))                                &
+DO CONCURRENT ( JI=1:JIU,JJ=1:JJU )        
+ZFLX(JI,JJ,IKB-1) = &
+        PTAU11M(JI,JJ) * BR_P2(ZDIRSINZW(JI,JJ))                                &
+  +     PTAU33M(JI,JJ) * BR_P2(PDIRCOSZW(JI,JJ))                                &
+  +2. * PCDUEFF(JI,JJ)* PUSLOPEM(JI,JJ)  * ZDIRSINZW(JI,JJ) * PDIRCOSZW(JI,JJ)
+END DO ! CONCURRENT        
 #endif
-  +2. * PCDUEFF(:,:)* PUSLOPEM(:,:)  * ZDIRSINZW(:,:) * PDIRCOSZW(:,:) 
 !$acc end kernels
   ! 
 !
diff --git a/src/MNH/turb_hor_uv.f90 b/src/MNH/turb_hor_uv.f90
index 328e6fd57bfbf2e97e4f11127a6d469f7b2180b6..9866f9adf5f7b3534164d3eb18cecb3a1738812c 100644
--- a/src/MNH/turb_hor_uv.f90
+++ b/src/MNH/turb_hor_uv.f90
@@ -450,16 +450,18 @@ ZFLX(:,:,IKB-1) =                                                           &
           PDIRCOSZW(:,:) * ZDIRSINZW(:,:)                                     &
     +PVSLOPEM(:,:) * (PCOSSLOPE(:,:)**2 - PSINSLOPE(:,:)**2) * ZDIRSINZW(:,:) )
 #else
-ZFLX(:,:,IKB-1) =                                                           &
-   PTAU11M(:,:) * PCOSSLOPE(:,:) * PSINSLOPE(:,:) * BR_P2(PDIRCOSZW(:,:))     &
-  +PTAU12M(:,:) * (BR_P2(PCOSSLOPE(:,:)) - BR_P2(PSINSLOPE(:,:))) *           &
-                  BR_P2(PDIRCOSZW(:,:))                                       &
-  -PTAU22M(:,:) * PCOSSLOPE(:,:) * PSINSLOPE(:,:)                             &
-  +PTAU33M(:,:) * PCOSSLOPE(:,:) * PSINSLOPE(:,:) * BR_P2(ZDIRSINZW(:,:))     &
-  -PCDUEFF(:,:) * (                                                           &
-    2. * PUSLOPEM(:,:) * PCOSSLOPE(:,:) * PSINSLOPE(:,:) *                    &
-          PDIRCOSZW(:,:) * ZDIRSINZW(:,:)                                     &
-    +PVSLOPEM(:,:) * (BR_P2(PCOSSLOPE(:,:)) - BR_P2(PSINSLOPE(:,:))) * ZDIRSINZW(:,:) )
+DO CONCURRENT ( JI=1:JIU,JJ=1:JJU )
+ZFLX(JI,JJ,IKB-1) =                                                           &
+   PTAU11M(JI,JJ) * PCOSSLOPE(JI,JJ) * PSINSLOPE(JI,JJ) * BR_P2(PDIRCOSZW(JI,JJ))     &
+  +PTAU12M(JI,JJ) * (BR_P2(PCOSSLOPE(JI,JJ)) - BR_P2(PSINSLOPE(JI,JJ))) *           &
+                  BR_P2(PDIRCOSZW(JI,JJ))                                       &
+  -PTAU22M(JI,JJ) * PCOSSLOPE(JI,JJ) * PSINSLOPE(JI,JJ)                             &
+  +PTAU33M(JI,JJ) * PCOSSLOPE(JI,JJ) * PSINSLOPE(JI,JJ) * BR_P2(ZDIRSINZW(JI,JJ))     &
+  -PCDUEFF(JI,JJ) * (                                                           &
+    2. * PUSLOPEM(JI,JJ) * PCOSSLOPE(JI,JJ) * PSINSLOPE(JI,JJ) *                    &
+          PDIRCOSZW(JI,JJ) * ZDIRSINZW(JI,JJ)                                     &
+          +PVSLOPEM(JI,JJ) * (BR_P2(PCOSSLOPE(JI,JJ)) - BR_P2(PSINSLOPE(JI,JJ))) * ZDIRSINZW(JI,JJ) )
+END DO ! CONCURRENT
 #endif
 !$acc end kernels
 !