diff --git a/src/MNH/modd_mnh_surfexn.f90 b/src/MNH/modd_mnh_surfexn.f90
new file mode 100644
index 0000000000000000000000000000000000000000..5863841a2e60edefea80eac670e1d60e63ffaaa7
--- /dev/null
+++ b/src/MNH/modd_mnh_surfexn.f90
@@ -0,0 +1,71 @@
+MODULE MODD_MNH_SURFEX_n
+!
+USE YOMHOOK   ,ONLY : LHOOK,   DR_HOOK
+USE PARKIND1  ,ONLY : JPRB
+!
+USE MODD_SURFEX_n, ONLY : SURFEX_t
+!
+USE MODE_MODELN_SURFEX_HANDLER 
+!
+TYPE(SURFEX_t), ALLOCATABLE, TARGET, SAVE :: YSURF_LIST(:)
+TYPE(SURFEX_t), POINTER :: YSURF_CUR => NULL()
+!$OMP THREADPRIVATE(YSURF_CUR)
+!
+CONTAINS
+!
+SUBROUTINE GOTO_SURFEX(KMODEL)
+
+INTEGER, INTENT(IN) :: KMODEL
+REAL(KIND=JPRB) :: ZHOOK_HANDLE
+IF (LHOOK) CALL DR_HOOK("MODD_MNH_SURFEX_n:GOTO_MODEL",0,ZHOOK_HANDLE)
+!
+YSURF_CUR => YSURF_LIST(KMODEL)
+ICURRENT_MODEL = KMODEL
+!
+IF (LHOOK) CALL DR_HOOK("MODD_MNH_SURFEX_n:GOTO_MODEL",1,ZHOOK_HANDLE)
+!
+END SUBROUTINE GOTO_SURFEX
+!
+SUBROUTINE SURFEX_ALLOC_LIST(KMODEL)
+!
+USE MODI_SURFEX_ALLOC
+!
+IMPLICIT NONE
+!
+INTEGER, INTENT(IN) :: KMODEL
+INTEGER :: J
+REAL(KIND=JPRB) :: ZHOOK_HANDLE
+IF (LHOOK) CALL DR_HOOK("MODD_MNH_SURFEX_n:SURFEX_ALLOC_LIST",0,ZHOOK_HANDLE)
+!
+CALL INIT_CURRENT_MODEL_INDEX_SURFEX()
+!
+ALLOCATE(YSURF_LIST(KMODEL))
+!
+DO J = 1,KMODEL
+  CALL SURFEX_ALLOC(YSURF_LIST(J))
+ENDDO
+!
+IF (LHOOK) CALL DR_HOOK("MODD_MNH_SURFEX_n:SURFEX_ALLOC_LIST",1,ZHOOK_HANDLE)
+!
+END SUBROUTINE SURFEX_ALLOC_LIST
+!
+SUBROUTINE SURFEX_DEALLO_LIST
+!
+USE MODI_SURFEX_DEALLO
+!
+INTEGER :: J
+REAL(KIND=JPRB) :: ZHOOK_HANDLE
+IF (LHOOK) CALL DR_HOOK("MODD_MNH_SURFEX_n:SURFEX_DEALLO_LIST",0,ZHOOK_HANDLE)
+!
+DO J=1,SIZE(YSURF_LIST)
+  CALL SURFEX_DEALLO(YSURF_LIST(J))
+ENDDO
+!
+IF (ASSOCIATED(YSURF_CUR)) NULLIFY(YSURF_CUR)
+IF (ALLOCATED(YSURF_LIST)) DEALLOCATE(YSURF_LIST)
+!
+IF (LHOOK) CALL DR_HOOK("MODD_MNH_SURFEX_n:SURFEX_DEALLO_LIST",1,ZHOOK_HANDLE)
+!
+END SUBROUTINE SURFEX_DEALLO_LIST
+!
+END MODULE MODD_MNH_SURFEX_n
diff --git a/src/MNH/sum_on_all_procs_mnh_hal.f90 b/src/MNH/sum_on_all_procs_mnh_hal.f90
new file mode 100644
index 0000000000000000000000000000000000000000..982081140a0954fc85c36382fb3f17779375e27b
--- /dev/null
+++ b/src/MNH/sum_on_all_procs_mnh_hal.f90
@@ -0,0 +1,84 @@
+!MNH_LIC Copyright 1994-2014 CNRS, Meteo-France and Universite Paul Sabatier
+!MNH_LIC This is part of the Meso-NH software governed by the CeCILL-C licence
+!MNH_LIC version 1. See LICENSE, CeCILL-C_V1-en.txt and CeCILL-C_V1-fr.txt  
+!MNH_LIC for details. version 1.
+!     #########
+      SUBROUTINE SUM_ON_ALL_PROCS_MNH_HAL(KSIZE,KIN,KOUT)
+!     #######################################################
+!
+!
+!!****  *SUM_ON_ALL_PROCS* - sums the values of the integers provided on each processor
+!!
+!!    PURPOSE
+!!    -------
+!!
+!!**  METHOD
+!!    ------
+!!
+!!    EXTERNAL
+!!    --------
+!!
+!!
+!!    IMPLICIT ARGUMENTS
+!!    ------------------
+!!
+!!    REFERENCE
+!!    ---------
+!!
+!!
+!!    AUTHOR
+!!    ------
+!!	V. Masson    *Meteo France*	
+!!
+!!    MODIFICATIONS
+!!    -------------
+!!      Original    07/2011 
+!-------------------------------------------------------------------------------
+!
+!*       0.    DECLARATIONS
+!              ------------
+!
+!
+USE MODD_IO_SURF_MNH, ONLY : NHALO
+USE MODE_ll
+!
+IMPLICIT NONE
+!
+!*       0.1   Declarations of arguments
+!              -------------------------
+!
+INTEGER,                   INTENT(IN) :: KSIZE  ! sim of integer array
+INTEGER, DIMENSION(KSIZE), INTENT(IN) :: KIN    ! array of integer to sum
+INTEGER,                   INTENT(OUT):: KOUT   ! sum on all processors 
+!                                               ! (excluding halos)
+!
+!*       0.2   Declarations of local variables
+!              -------------------------------
+!
+REAL    :: ZIN
+INTEGER :: IIB, IIE, IJB, IJE
+INTEGER :: NIMAX, NJMAX
+INTEGER :: JI, JJ
+INTEGER :: IINDEX
+!
+INTEGER :: IRESP ! return code
+!-------------------------------------------------------------------------------
+!
+CALL GET_INDICE_ll (IIB,IJB,IIE,IJE)
+NIMAX=IIE-IIB+1
+NJMAX=IJE-IJB+1
+!
+ZIN = 0.
+DO JJ=1,NJMAX+2*NHALO
+  DO JI=1,NIMAX+2*NHALO
+    IINDEX = JI + (JJ-1) * (NIMAX+2*NHALO)
+    ZIN = ZIN + FLOAT(KIN(IINDEX))
+  END DO
+END DO
+!
+CALL REDUCESUM_ll(ZIN,IRESP)
+KOUT = NINT(ZIN)
+!
+!-------------------------------------------------------------------------------
+!
+END SUBROUTINE SUM_ON_ALL_PROCS_MNH_HAL