IF (ok_mensuel) THEN
c
      ndex2d = 0
      ndex3d = 0
      zx_tmp_2d = 0.
      z4_tmp_2d = 0.
      zx_tmp_3d = 0.
      z4_tmp_3d = 0.
      zx_tmp_fi2d=0.
      zx_tmp_fi3d=0.
c
         zsto = dtime
         zout = dtime * FLOAT(ecrit_mth)
         itau_w = itau_phy + itap
c
c-------------------------------------------------------
      IF(lev_histmth.GE.1) THEN
c
ccccccccccccc 2D fields, invariables
c
      CALL gr_fi_ecrit(1,klon,iim,jjmp1,pphis,zx_tmp_2d)
      z4_tmp_2d=zx_tmp_2d
      CALL histwrite(nid_mth,"phis",itau_w,z4_tmp_2d,iim*jjmp1,ndex2d)
C
      CALL gr_fi_ecrit(1,klon,iim,jjmp1,airephy,zx_tmp_2d)
      z4_tmp_2d=zx_tmp_2d
      CALL histwrite(nid_mth,"aire",itau_w,z4_tmp_2d,iim*jjmp1,ndex2d)
c
ccccccc axe Ls
      do j=1,jjmp1
       do i=1,iim
        z4_tmp_2d(i,j)=zls*180./RPI      ! zls est en radians !!
       enddo
      enddo
      CALL histwrite(nid_mth,"ls",itau_w,z4_tmp_2d,iim*jjmp1,ndex2d)
c
ccccccccccccc 2D fields, variables
c
      CALL gr_fi_ecrit(1, klon,iim,jjmp1, ftsol,zx_tmp_2d)
      z4_tmp_2d=zx_tmp_2d
      CALL histwrite(nid_mth,"tsol",itau_w,z4_tmp_2d,iim*jjmp1,ndex2d)
c
      DO i = 1, klon
         zx_tmp_fi2d(i) = paprs(i,1)
      ENDDO
      CALL gr_fi_ecrit(1, klon,iim,jjmp1, zx_tmp_fi2d,zx_tmp_2d)
      z4_tmp_2d=zx_tmp_2d
      CALL histwrite(nid_mth,"psol",itau_w,z4_tmp_2d,iim*jjmp1,ndex2d)
c
c     CALL gr_fi_ecrit(1, klon,iim,jjmp1, ue,zx_tmp_2d)
c     z4_tmp_2d=zx_tmp_2d
c     CALL histwrite(nid_mth,"ue",itau_w,z4_tmp_2d,iim*jjmp1,ndex2d)
c
c     CALL gr_fi_ecrit(1, klon,iim,jjmp1, ve,zx_tmp_2d)
c     z4_tmp_2d=zx_tmp_2d
c     CALL histwrite(nid_mth,"ve",itau_w,z4_tmp_2d,iim*jjmp1,ndex2d)
c
      ENDIF !lev_histmth.GE.1
c
c-------------------------------------------------------
      IF(lev_histmth.GE.2) THEN
c
ccccccccccccc 3D fields, basics
c
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1, t_seri, zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"temp",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1, pplay, zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"pres",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1, zphi, zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"geop",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1, u_seri, zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"vitu",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1, v_seri, zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"vitv",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1, omega, zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"vitw",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c
      CALL gr_fi_ecrit(1, klon,iim,jjmp1, topsw,zx_tmp_2d)
      z4_tmp_2d=zx_tmp_2d
      CALL histwrite(nid_mth,"tops",itau_w,z4_tmp_2d,iim*jjmp1,ndex2d)
c
         if (iflag_trac.eq.1) THEN
          if (microfi.eq.1) then
           DO iq=1,nmicro
       CALL gr_fi_ecrit(klev,klon,iim,jjmp1, qaer(1,1,iq), zx_tmp_3d)
       z4_tmp_3d=zx_tmp_3d
       CALL histwrite(nid_mth,tname(iq),itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
           ENDDO
	  endif
	  if (nmicro.lt.nqmax) then
           DO iq=nmicro+1,nqmax
       CALL gr_fi_ecrit(klev,klon,iim,jjmp1,tr_seri(1,1,iq),zx_tmp_3d)
       z4_tmp_3d=zx_tmp_3d
       CALL histwrite(nid_mth,tname(iq),itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
           ENDDO
c Condensation:
c          DO iq=nmicro+1,nqmax
c      CALL gr_fi_ecrit(klev,klon,iim,jjmp1,d_tr_mph(1,1,iq),zx_tmp_3d)
c      z4_tmp_3d=zx_tmp_3d
c      CALL histwrite(nid_mth,"c_"//tname(iq),itau_w,z4_tmp_3d,
c    .                                   iim*jjmp1*klev,ndex3d)
c          ENDDO
	  endif
         endif
c
      ENDIF !lev_histmth.GE.2
c
c-------------------------------------------------------
      IF(lev_histmth.GE.3) THEN
c
cccccccccccccccccc  Radiative transfer
c
c 2D
c
      CALL gr_fi_ecrit(1, klon,iim,jjmp1, toplw,zx_tmp_2d)
      z4_tmp_2d=zx_tmp_2d
      CALL histwrite(nid_mth,"topl",itau_w,z4_tmp_2d,iim*jjmp1,ndex2d)
c
      CALL gr_fi_ecrit(1, klon,iim,jjmp1, solsw,zx_tmp_2d)
      z4_tmp_2d=zx_tmp_2d
      CALL histwrite(nid_mth,"sols",itau_w,z4_tmp_2d,iim*jjmp1,ndex2d)
c
      CALL gr_fi_ecrit(1, klon,iim,jjmp1, sollw,zx_tmp_2d)
      z4_tmp_2d=zx_tmp_2d
      CALL histwrite(nid_mth,"soll",itau_w,z4_tmp_2d,iim*jjmp1,ndex2d)
c
c 3D
c
      zx_tmp_fi3d(1:klon,1:klev)=swnet(1:klon,1:klev)
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1,zx_tmp_fi3d,zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"SWnet",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c
      zx_tmp_fi3d(1:klon,1:klev)=lwnet(1:klon,1:klev)
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1,zx_tmp_fi3d,zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"LWnet",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c
      ENDIF !lev_histmth.GE.3
c
c-------------------------------------------------------
      IF(lev_histmth.GE.4) THEN
c
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1, d_t_dyn, zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"dtdyn",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1, d_t, zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"dtphy",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c K/s
      zx_tmp_fi3d(1:klon,1:klev)=d_t_vdf(1:klon,1:klev)
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1,zx_tmp_fi3d,zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"dtvdf",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c
c K/s
      zx_tmp_fi3d(1:klon,1:klev)=d_t_ajs(1:klon,1:klev)
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1,zx_tmp_fi3d,zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"dtajs",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c
c K/s
      zx_tmp_fi3d(1:klon,1:klev)=heat(1:klon,1:klev)
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1,zx_tmp_fi3d,zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"dtswr",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c
c K/s      
      zx_tmp_fi3d(1:klon,1:klev)=-1.*cool(1:klon,1:klev)
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1,zx_tmp_fi3d,zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"dtlwr",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c K/s      
c     zx_tmp_fi3d(1:klon,1:klev)=d_t_ec(1:klon,1:klev)
c     CALL gr_fi_ecrit(klev,klon,iim,jjmp1,zx_tmp_fi3d,zx_tmp_3d)
c     z4_tmp_3d=zx_tmp_3d
c     CALL histwrite(nid_mth,"dtec",itau_w,z4_tmp_3d,
c    .                                   iim*jjmp1*klev,ndex3d)
c
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1, d_u_vdf, zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"duvdf",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c
      CALL gr_fi_ecrit(klev,klon,iim,jjmp1, d_u_dyn, zx_tmp_3d)
      z4_tmp_3d=zx_tmp_3d
      CALL histwrite(nid_mth,"dudyn",itau_w,z4_tmp_3d,
     .                                   iim*jjmp1*klev,ndex3d)
c
c     CALL gr_fi_ecrit(klev,klon,iim,jjmp1, d_v_vdf, zx_tmp_3d)
c     z4_tmp_3d=zx_tmp_3d
c     CALL histwrite(nid_mth,"dvvdf",itau_w,z4_tmp_3d,
c    .                                   iim*jjmp1*klev,ndex3d)
c
      ENDIF !lev_histmth.GE.4
c
c-------------------------------------------------------
      IF(lev_histmth.GE.5) THEN
c
c
c      CALL gr_fi_ecrit(1, klon,iim,jjmp1, fluxu , zx_tmp_2d)
c      z4_tmp_2d=zx_tmp_2d
c      CALL histwrite(nid_mth,"taux_",itau_w,
c    $      z4_tmp_2d,iim*jjmp1,ndex2d) 
c      
c      CALL gr_fi_ecrit(1, klon,iim,jjmp1, fluxv , zx_tmp_2d)
c      z4_tmp_2d=zx_tmp_2d
c      CALL histwrite(nid_mth,"tauy_",itau_w,
c    $      z4_tmp_2d,iim*jjmp1,ndex2d)
c
c     CALL gr_fi_ecrit(1, klon,iim,jjmp1, cdragm,zx_tmp_2d)
c      z4_tmp_2d=zx_tmp_2d
c     CALL histwrite(nid_mth,"cdrm",itau_w,z4_tmp_2d,iim*jjmp1,ndex2d)
c
c     CALL gr_fi_ecrit(1, klon,iim,jjmp1, cdragh,zx_tmp_2d)
c      z4_tmp_2d=zx_tmp_2d
c     CALL histwrite(nid_mth,"cdrh",itau_w,z4_tmp_2d,iim*jjmp1,ndex2d)
c
      ENDIF !lev_histmth.GE.5
c-------------------------------------------------------
c
      if (ok_sync) then
        call histsync(nid_mth)
      endif

      ENDIF