diff --git a/src/MNH/modd_sub_modeln.f90 b/src/MNH/modd_sub_modeln.f90
index 121f5d3570b1c0bdfbafc17920bf3ce92b92cdfa..e7f0a854aec1e3435fec0a8350ca9269d98a1135 100644
--- a/src/MNH/modd_sub_modeln.f90
+++ b/src/MNH/modd_sub_modeln.f90
@@ -48,7 +48,7 @@ TYPE SUB_MODEL_t
   REAL*8,DIMENSION(2)    :: XT_TURB,XT_2WAY,XT_SHADOWS
   REAL*8,DIMENSION(2)    :: XT_FORCING,XT_NUDGING,XT_CHEM
 
-  REAL, DIMENSION(:,:,:), POINTER :: ZWT_ACT_NUC=>NULL()
+  REAL, DIMENSION(:,:,:), POINTER :: XWT_ACT_NUC=>NULL()
                              ! Vertical motion used for ACTivation/NUCleation
   LOGICAL, DIMENSION(:,:), POINTER :: GMASKkids=>NULL() ! kids domains mask
 
@@ -77,7 +77,7 @@ REAL*8,DIMENSION(:), POINTER :: XT_COUPL=>NULL(),XT_1WAY=>NULL(),XT_STEP_BUD=>NU
 REAL*8,DIMENSION(:), POINTER :: XT_RAD=>NULL(),XT_DCONV=>NULL(),XT_GROUND=>NULL(),XT_MAFL=>NULL()
 REAL*8,DIMENSION(:), POINTER :: XT_TURB=>NULL(),XT_2WAY=>NULL(),XT_TRACER=>NULL()
 REAL*8,DIMENSION(:), POINTER :: XT_FORCING=>NULL(),XT_NUDGING=>NULL(),XT_CHEM=>NULL()
-REAL, DIMENSION(:,:,:), POINTER :: ZWT_ACT_NUC=>NULL()
+REAL, DIMENSION(:,:,:), POINTER :: XWT_ACT_NUC=>NULL()
 LOGICAL, DIMENSION(:,:), POINTER :: GMASKkids=>NULL()
 LOGICAL, POINTER :: GCLOSE_OUT=>NULL()
 
@@ -99,7 +99,7 @@ SUB_MODEL_MODEL(KFROM)%TLSHALO2_ll=>TLSHALO2_ll
 SUB_MODEL_MODEL(KFROM)%THALO2T_ll=>THALO2T_ll
 SUB_MODEL_MODEL(KFROM)%THALO2MT_ll=>THALO2MT_ll
 SUB_MODEL_MODEL(KFROM)%THALO2SC_ll=>THALO2SC_ll
-SUB_MODEL_MODEL(KFROM)%ZWT_ACT_NUC=>ZWT_ACT_NUC
+SUB_MODEL_MODEL(KFROM)%XWT_ACT_NUC=>XWT_ACT_NUC
 SUB_MODEL_MODEL(KFROM)%GMASKkids=>GMASKkids  
 !
 ! Current model is set to model KTO
@@ -152,7 +152,7 @@ XT_SHADOWS=>SUB_MODEL_MODEL(KTO)%XT_SHADOWS
 XT_FORCING=>SUB_MODEL_MODEL(KTO)%XT_FORCING
 XT_NUDGING=>SUB_MODEL_MODEL(KTO)%XT_NUDGING
 XT_CHEM=>SUB_MODEL_MODEL(KTO)%XT_CHEM
-ZWT_ACT_NUC=>SUB_MODEL_MODEL(KTO)%ZWT_ACT_NUC
+XWT_ACT_NUC=>SUB_MODEL_MODEL(KTO)%XWT_ACT_NUC
 GMASKkids=>SUB_MODEL_MODEL(KTO)%GMASKkids  
 GCLOSE_OUT=>SUB_MODEL_MODEL(KTO)%GCLOSE_OUT
 
diff --git a/src/MNH/modeln.f90 b/src/MNH/modeln.f90
index 09252e702dbd1ee3e872e28438b71919f199670a..a2884c77f766d699980473971e73e0a91f97cec4 100644
--- a/src/MNH/modeln.f90
+++ b/src/MNH/modeln.f90
@@ -632,7 +632,7 @@ IF (KTCOUNT == 1) THEN
   NULLIFY(TLSHALO2_ll)
   NULLIFY(TFIELDSC_ll)
 !
-  ALLOCATE(ZWT_ACT_NUC(SIZE(XWT,1),SIZE(XWT,2),SIZE(XWT,3)))
+  ALLOCATE(XWT_ACT_NUC(SIZE(XWT,1),SIZE(XWT,2),SIZE(XWT,3)))
   ALLOCATE(GMASKkids(SIZE(XWT,1),SIZE(XWT,2)))
 !
 ! initialization of the FM file backup/output number
@@ -1776,19 +1776,19 @@ IF (CCLOUD /= 'NONE' .AND. CELEC == 'NONE') THEN
   IF (CCLOUD == 'C2R2' .OR. CCLOUD == 'KHKO' .OR. CCLOUD == 'C3R5' &
                                              .OR. CCLOUD == "LIMA" ) THEN
     IF ( LFORCING ) THEN
-      ZWT_ACT_NUC(:,:,:) = XWT(:,:,:) + XWTFRC(:,:,:)
+      XWT_ACT_NUC(:,:,:) = XWT(:,:,:) + XWTFRC(:,:,:)
     ELSE
-      ZWT_ACT_NUC(:,:,:) = XWT(:,:,:)
+      XWT_ACT_NUC(:,:,:) = XWT(:,:,:)
     END IF
     IF (CTURB /= 'NONE' ) THEN
      IF ( ((CCLOUD=='C2R2'.OR.CCLOUD=='KHKO').AND.LACTTKE) .OR. (CCLOUD=='LIMA'.AND.MACTTKE) ) THEN 
-       ZWT_ACT_NUC(:,:,:) = ZWT_ACT_NUC(:,:,:) +  (2./3. * XTKET(:,:,:))**0.5
+       XWT_ACT_NUC(:,:,:) = XWT_ACT_NUC(:,:,:) +  (2./3. * XTKET(:,:,:))**0.5
      ELSE
-       ZWT_ACT_NUC(:,:,:) = ZWT_ACT_NUC(:,:,:) 
+       XWT_ACT_NUC(:,:,:) = XWT_ACT_NUC(:,:,:) 
      ENDIF
     ENDIF
   ELSE
-    ZWT_ACT_NUC(:,:,:) = 0.
+    XWT_ACT_NUC(:,:,:) = 0.
   END IF
 !
   XRTHS_CLD  = XRTHS
@@ -1806,7 +1806,7 @@ IF (CCLOUD /= 'NONE' .AND. CELEC == 'NONE') THEN
                           GCLOSE_OUT, LSUBG_COND,LSIGMAS,CSUBG_AUCV,XTSTEP,    &
                           XZZ, XRHODJ, XRHODREF, XEXNREF,                      &
                           ZPABST, XTHT,XRT,XSIGS,VSIGQSAT,XMFCONV,XTHM,XRCM,   &
-                          XPABSM, ZWT_ACT_NUC,XDTHRAD, XRTHS, XRRS,            &
+                          XPABSM, XWT_ACT_NUC,XDTHRAD, XRTHS, XRRS,            &
                           XSVT, XRSVS,                                         &
                           XSRCT, XCLDFR,XCIT,                                  &
                           LSEDIC,KACTIT, KSEDC, KSEDI, KRAIN, KWARM, KHHONI,   &
@@ -1824,7 +1824,7 @@ IF (CCLOUD /= 'NONE' .AND. CELEC == 'NONE') THEN
                           GCLOSE_OUT, LSUBG_COND,LSIGMAS,CSUBG_AUCV,           &
                           XTSTEP,XZZ, XRHODJ, XRHODREF, XEXNREF,               &
                           ZPABST, XTHT,XRT,XSIGS,VSIGQSAT,XMFCONV,XTHM,XRCM,   &
-                          XPABSM, ZWT_ACT_NUC,XDTHRAD, XRTHS, XRRS,            &
+                          XPABSM, XWT_ACT_NUC,XDTHRAD, XRTHS, XRRS,            &
                           XSVT, XRSVS,                                         &
                           XSRCT, XCLDFR,XCIT,                                  &
                           LSEDIC,KACTIT, KSEDC, KSEDI, KRAIN, KWARM, KHHONI,   &
@@ -1884,7 +1884,7 @@ XTIME_BU_PROCESS = 0.
 XTIME_LES_BU_PROCESS = 0.
 !
 IF (CELEC /= 'NONE' .AND. (CCLOUD(1:3) == 'ICE')) THEN
-  ZWT_ACT_NUC(:,:,:) = 0.
+  XWT_ACT_NUC(:,:,:) = 0.
 !
   XRTHS_CLD = XRTHS
   XRRS_CLD  = XRRS