diff --git a/src/MNH/ini_mean_field.f90 b/src/MNH/ini_mean_field.f90
index a96189e7d1e201a44565ceb40da08dd5378ccd59..2a5e5eca1b8214deca9eb357c0cb7b3f8c848c12 100644
--- a/src/MNH/ini_mean_field.f90
+++ b/src/MNH/ini_mean_field.f90
@@ -47,7 +47,9 @@ END MODULE MODI_INI_MEAN_FIELD
 !!    MODIFICATIONS
 !!    -------------
 !!      Original        11/12/09
-!!                      10/2016 (C.Lac) Add max values
+!!      Modifications   10/2016 (C.Lac) Add max values
+!!                      04/2017 (P. Wautelet) Initialize MAX variables to lowest possible value
+!!
 !-------------------------------------------------------------------------------
 !
 !*       0.    DECLARATIONS
@@ -60,6 +62,10 @@ USE MODD_PARAM_n
 
 IMPLICIT NONE
 !
+REAL :: ZMIN !Largest real negative value
+!
+ZMIN = -HUGE(ZMIN)
+!
 MEAN_COUNT = 0
 
 XUM_MEAN  = 0.0
@@ -77,12 +83,12 @@ XTH2_MEAN = 0.0
 XTEMP2_MEAN = 0.0
 XPABS2_MEAN = 0.0
 
-XUM_MAX  = 0.0
-XVM_MAX  = 0.0
-XWM_MAX  = 0.0
-XTHM_MAX = 0.0
-XTEMPM_MAX = 0.0
-IF (CTURB /= 'NONE') XTKEM_MAX = 0.0
-XPABSM_MAX = 0.0
+XUM_MAX  = ZMIN
+XVM_MAX  = ZMIN
+XWM_MAX  = ZMIN
+XTHM_MAX = ZMIN
+XTEMPM_MAX = ZMIN
+IF (CTURB /= 'NONE') XTKEM_MAX = ZMIN
+XPABSM_MAX = ZMIN
 
 END SUBROUTINE INI_MEAN_FIELD
diff --git a/src/MNH/ini_modeln.f90 b/src/MNH/ini_modeln.f90
index abf1559c57c3c16c4e216ab322c4b09320b433f9..15b752c7d24a47a5a296abb5b5716efa97e8a702 100644
--- a/src/MNH/ini_modeln.f90
+++ b/src/MNH/ini_modeln.f90
@@ -270,7 +270,8 @@ END MODULE MODI_INI_MODEL_n
 !!                   M.Leriche 2016 Chemistry
 !!                   10/2016 M.Mazoyer New KHKO output fields
 !!                      10/2016 (C.Lac) Add max values
-!!       F. Brosse   Oct.  2016 add prod/loss terms computation for chemistry       
+!!       F. Brosse   Oct.  2016 add prod/loss terms computation for chemistry
+!!                   Apr. 2017 (P. Wautelet) allocate MAX variables if LMEAN_FIELD and call INI_MEAN_FIELD
 !---------------------------------------------------------------------------------
 !
 !*       0.    DECLARATIONS
@@ -694,23 +695,30 @@ IF (LMEAN_FIELD) THEN
 !
   MEAN_COUNT = 0
 !
-  ALLOCATE(XUM_MEAN(IIU,IJU,IKU))      ; XUM_MEAN  = 0.0
-  ALLOCATE(XVM_MEAN(IIU,IJU,IKU))      ; XVM_MEAN  = 0.0
-  ALLOCATE(XWM_MEAN(IIU,IJU,IKU))      ; XWM_MEAN  = 0.0
-  ALLOCATE(XTHM_MEAN(IIU,IJU,IKU))     ; XTHM_MEAN = 0.0
-  ALLOCATE(XTEMPM_MEAN(IIU,IJU,IKU))   ; XTEMPM_MEAN = 0.0
-  IF (CTURB/='NONE') THEN
-     ALLOCATE(XTKEM_MEAN(IIU,IJU,IKU))    
-     XTKEM_MEAN = 0.0
-  END IF
-  ALLOCATE(XPABSM_MEAN(IIU,IJU,IKU))   ; XPABSM_MEAN = 0.0
-!
-  ALLOCATE(XU2_MEAN(IIU,IJU,IKU))      ; XU2_MEAN  = 0.0
-  ALLOCATE(XV2_MEAN(IIU,IJU,IKU))      ; XV2_MEAN  = 0.0
-  ALLOCATE(XW2_MEAN(IIU,IJU,IKU))      ; XW2_MEAN  = 0.0
-  ALLOCATE(XTH2_MEAN(IIU,IJU,IKU))     ; XTH2_MEAN = 0.0
-  ALLOCATE(XTEMP2_MEAN(IIU,IJU,IKU))   ; XTEMP2_MEAN = 0.0
-  ALLOCATE(XPABS2_MEAN(IIU,IJU,IKU))   ; XPABS2_MEAN = 0.0
+  ALLOCATE(XUM_MEAN(IIU,IJU,IKU))
+  ALLOCATE(XVM_MEAN(IIU,IJU,IKU))
+  ALLOCATE(XWM_MEAN(IIU,IJU,IKU))
+  ALLOCATE(XTHM_MEAN(IIU,IJU,IKU))
+  ALLOCATE(XTEMPM_MEAN(IIU,IJU,IKU))
+  IF (CTURB/='NONE') ALLOCATE(XTKEM_MEAN(IIU,IJU,IKU))
+  ALLOCATE(XPABSM_MEAN(IIU,IJU,IKU))
+!
+  ALLOCATE(XU2_MEAN(IIU,IJU,IKU))
+  ALLOCATE(XV2_MEAN(IIU,IJU,IKU))
+  ALLOCATE(XW2_MEAN(IIU,IJU,IKU))
+  ALLOCATE(XTH2_MEAN(IIU,IJU,IKU))
+  ALLOCATE(XTEMP2_MEAN(IIU,IJU,IKU))
+  ALLOCATE(XPABS2_MEAN(IIU,IJU,IKU))
+!
+  ALLOCATE(XUM_MAX(IIU,IJU,IKU))
+  ALLOCATE(XVM_MAX(IIU,IJU,IKU))
+  ALLOCATE(XWM_MAX(IIU,IJU,IKU))
+  ALLOCATE(XTHM_MAX(IIU,IJU,IKU))
+  ALLOCATE(XTEMPM_MAX(IIU,IJU,IKU))
+  IF (CTURB/='NONE') ALLOCATE(XTKEM_MAX(IIU,IJU,IKU))
+  ALLOCATE(XPABSM_MAX(IIU,IJU,IKU))
+!
+  CALL INI_MEAN_FIELD()
 !
 END IF
 !