! $Id: newmicro.F 1989 2014-03-03 09:57:40Z fairhead $


!     
      SUBROUTINE newmicro (ok_cdnc, bl95_b0, bl95_b1, 
     .                  paprs, pplay,
     .                  t, pqlwp, pclc, pcltau, pclemi,
     .                  pch, pcl, pcm, pct, pctlwp,
     .                  xflwp, xfiwp, xflwc, xfiwc,
     .                  mass_solu_aero, mass_solu_aero_pi, 
     .                  pcldtaupi, re, fl, 
     .                  reliq, reice, reliq_pi, reice_pi)
c
      USE dimphy
      USE phys_local_var_mod, only: scdnc,cldncl,reffclwtop,lcc,
     .                              reffclws,reffclwc,cldnvi,lcc3d,
     .                              lcc3dcon,lcc3dstra
      USE phys_state_var_mod, only: rnebcon,clwcon
      IMPLICIT none
c======================================================================
c Auteur(s): Z.X. Li (LMD/CNRS) date: 19930910
c            O.   Boucher (LMD/CNRS) mise a jour en 201212
c Objet: Calculer epaisseur optique et emmissivite des nuages
c======================================================================
c Arguments:
c ok_cdnc-input-L-flag pour calculer les rayons a partir des aerosols
c
c t-------input-R-temperature
c pqlwp---input-R-eau liquide nuageuse dans l'atmosphere dans la partie nuageuse (kg/kg)
c pclc----input-R-couverture nuageuse pour le rayonnement (0 a 1)
c mass_solu_aero-----input-R-total mass concentration for all soluble aerosols[ug/m^3]
c mass_solu_aero_pi--input-R-ditto, pre-industrial value
c
c bl95_b0-input-R-a PARAMETER, may be varied for tests (s-sea, l-land)
c bl95_b1-input-R-a PARAMETER, may be varied for tests (    -"-      )
c      
c re------output-R-Cloud droplet effective radius multiplied by fl [um]
c fl------output-R-Denominator to re, introduced to avoid problems in
c                  the averaging of the output. fl is the fraction of liquid
c                  water clouds within a grid cell           
c
c pcltau--output-R-epaisseur optique des nuages
c pclemi--output-R-emissivite des nuages (0 a 1)
c pcldtaupi-output-R-pre-industrial value of cloud optical thickness, 
c
c pcl-output-R-2D low-level cloud cover
c pcm-output-R-2D mid-level cloud cover
c pch-output-R-2D high-level cloud cover
c pct-output-R-2D total cloud cover
c======================================================================
C
#include "YOMCST.h"
#include "nuage.h"
#include "radepsi.h"
#include "radopt.h"

c choix de l'hypothese de recouvrememnt nuageuse
      LOGICAL RANDOM, MAXIMUM_RANDOM, MAXIMUM
      PARAMETER (RANDOM=.FALSE., MAXIMUM_RANDOM=.TRUE., MAXIMUM=.FALSE.)
c
      LOGICAL, SAVE :: FIRST=.TRUE.
!$OMP THREADPRIVATE(FIRST)
      INTEGER flag_max
c
c threshold PARAMETERs
      REAL thres_tau,thres_neb
      PARAMETER (thres_tau=0.3, thres_neb=0.001)
c
      REAL phase3d(klon, klev)
      REAL tcc(klon), ftmp(klon), lcc_integrat(klon), height(klon)
c
      REAL paprs(klon,klev+1)
      REAL pplay(klon,klev)
      REAL t(klon,klev)
      REAL pclc(klon,klev)
      REAL pqlwp(klon,klev)
      REAL pcltau(klon,klev)
      REAL pclemi(klon,klev)
      REAL pcldtaupi(klon, klev)
c
      REAL pct(klon)
      REAL pcl(klon)
      REAL pcm(klon)
      REAL pch(klon)
      REAL pctlwp(klon)
c
      LOGICAL lo
c
!!Abderr modif JL mail du 19.01.2011 18:31
!      REAL cetahb, cetamb
!      PARAMETER (cetahb = 0.45, cetamb = 0.80)
! Remplacer
! cetahb*paprs(i,1) par  prmhc
! cetamb*paprs(i,1) par  prlmc 
      REAL prmhc    ! Pressure between medium and high level cloud in Pa
      REAL prlmc    ! Pressure between low and medium level cloud in Pa
      PARAMETER (prmhc = 440.*100., prlmc = 680.*100.)
C
      INTEGER i, k
      REAL xflwp(klon), xfiwp(klon)
      REAL xflwc(klon,klev), xfiwc(klon,klev)
c
      REAL radius
c
      REAL coef_froi, coef_chau
      PARAMETER (coef_chau=0.13, coef_froi=0.09)
c
      REAL seuil_neb
      PARAMETER (seuil_neb=0.001)
c
      INTEGER nexpo ! exponentiel pour glace/eau
      PARAMETER (nexpo=6)
c      PARAMETER (nexpo=1)

      REAL rel, tc, rei
      REAL k_ice0, k_ice, DF
      PARAMETER (k_ice0=0.005) ! units=m2/g
      PARAMETER (DF=1.66) ! diffusivity factor
c
cjq for the aerosol indirect effect
cjq introduced by Johannes Quaas (quaas@lmd.jussieu.fr), 27/11/2003
cjq      
      REAL mass_solu_aero(klon, klev)    ! total mass concentration for all soluble aerosols [ug m-3]
      REAL mass_solu_aero_pi(klon, klev) ! - " - (pre-industrial value)
      REAL cdnc(klon, klev)     ! cloud droplet number concentration [m-3]
      REAL re(klon, klev)       ! cloud droplet effective radius [um]
      REAL cdnc_pi(klon, klev)     ! cloud droplet number concentration [m-3] (pi value)
      REAL re_pi(klon, klev)       ! cloud droplet effective radius [um] (pi value)
      
      REAL fl(klon, klev)       ! xliq * rneb (denominator to re; fraction of liquid water clouds within the grid cell)
      
      LOGICAL ok_cdnc
      REAL bl95_b0, bl95_b1     ! Parameter in B&L 95-Formula
      
cjq-end    
cIM cf. CR:parametres supplementaires
      REAL zclear(klon)
      REAL zcloud(klon) 
      REAL zcloudh(klon) 
      REAL zcloudm(klon) 
      REAL zcloudl(klon) 
      REAL rhodz(klon, klev)  !--rho*dz pour la couche
      REAL zrho(klon, klev)   !--rho pour la couche
      REAL dh(klon, klev)     !--dz pour la couche
      REAL zfice(klon, klev)
      REAL rad_chaud(klon, klev)    !--rayon pour les nuages chauds
      REAL rad_chaud_pi(klon, klev) !--rayon pour les nuages chauds pre-industriels
      REAL zflwp_var, zfiwp_var
      REAL d_rei_dt

! Abderrahmane oct 2009
      Real reliq(klon, klev), reice(klon, klev)
      Real reliq_pi(klon, klev), reice_pi(klon, klev)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! FH : 2011/05/24
!
! rei = ( rei_max - rei_min ) * T(°C) / 81.4 + rei_max
! to be used for a temperature in celcius T(°C) < 0
! rei=rei_min for T(°C) < -81.4
!
! Calcul de la pente de la relation entre rayon effective des cristaux
! et la température.
! Pour retrouver les résultats numériques de la version d'origine,
! on impose 0.71 quand on est proche de 0.71
c
      d_rei_dt=(rei_max-rei_min)/81.4
      if (abs(d_rei_dt-0.71)<1.e-4) d_rei_dt=0.71
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
c
c Calculer l'epaisseur optique et l'emmissivite des nuages
c     IM inversion des DO
c
      xflwp = 0.d0
      xfiwp = 0.d0
      xflwc = 0.d0
      xfiwc = 0.d0
c
      reliq=0.
      reice=0.
      reliq_pi=0.
      reice_pi=0.
c
      DO k = 1, klev
        DO i = 1, klon
c-layer calculation
          rhodz(i,k) = (paprs(i,k)-paprs(i,k+1))/RG  ! kg/m2
          zrho(i,k)=pplay(i,k)/t(i,k)/RD             ! kg/m3
          dh(i,k)=rhodz(i,k)/zrho(i,k)               ! m
c-Fraction of ice in cloud using a linear transition
          zfice(i,k) = 1.0 - (t(i,k)-t_glace_min) / 
     &                       (t_glace_max-t_glace_min)
          zfice(i,k) = MIN(MAX(zfice(i,k),0.0),1.0)
c-IM Total Liquid/Ice water content                                    
          xflwc(i,k) = (1.-zfice(i,k))*pqlwp(i,k)
          xfiwc(i,k) = zfice(i,k)*pqlwp(i,k)
         ENDDO
      ENDDO

      IF (ok_cdnc) THEN
c
c--we compute cloud properties as a function of the aerosol load
c
        DO k = 1, klev
            DO i = 1, klon
c
c Formula "D" of Boucher and Lohmann, Tellus, 1995
c Cloud droplet number concentration (CDNC) is restricted
c to be within [20, 1000 cm^3]
c
c--present-day case
                cdnc(i,k) = 10.**(bl95_b0+bl95_b1*
     &               log(MAX(mass_solu_aero(i,k),1.e-4))/log(10.))*1.e6 !-m-3
                cdnc(i,k)=MIN(1000.e6,MAX(20.e6,cdnc(i,k)))
c
c--pre-industrial case
                cdnc_pi(i,k) = 10.**(bl95_b0+bl95_b1*
     &               log(MAX(mass_solu_aero_pi(i,k),1.e-4))/log(10.))
     &               *1.e6 !-m-3
                cdnc_pi(i,k)=MIN(1000.e6,MAX(20.e6,cdnc_pi(i,k)))
c
c--present-day case
                rad_chaud(i,k) = 
     &               1.1*((pqlwp(i,k)*pplay(i,k)/(RD * T(i,k)))  
     &               /(4./3*RPI*1000.*cdnc(i,k)) )**(1./3.)
                rad_chaud(i,k) = MAX(rad_chaud(i,k) * 1.e6, 5.) 
c
c--pre-industrial case
                rad_chaud_pi(i,k) = 
     &               1.1*((pqlwp(i,k)*pplay(i,k)/(RD * T(i,k)))  
     &               /(4./3.*RPI*1000.*cdnc_pi(i,k)))**(1./3.)
                rad_chaud_pi(i,k) = MAX(rad_chaud_pi(i,k)*1.e6, 5.) 
c 
c--pre-industrial case
c--liquid/ice cloud water paths:
                IF (pclc(i,k) .LE. seuil_neb) THEN
c
                pcldtaupi(i,k) = 0.0                  
c
                ELSE
c                  
                zflwp_var= 1000.*(1.-zfice(i,k))*pqlwp(i,k)/pclc(i,k)
     &               *rhodz(i,k)
                zfiwp_var= 1000.*zfice(i,k)*pqlwp(i,k)/pclc(i,k)
     &               *rhodz(i,k)
                tc = t(i,k)-273.15
                rei = d_rei_dt*tc + rei_max
                if (tc.le.-81.4) rei = rei_min
c
c-- cloud optical thickness :
c [for liquid clouds, traditional formula, 
c for ice clouds, Ebert & Curry (1992)] 
c                  
                if (zfiwp_var.eq.0. .or. rei.le.0.) rei = 1. 
                pcldtaupi(i,k) = 3.0/2.0 * zflwp_var / rad_chaud_pi(i,k)
     &                 + zfiwp_var * (3.448e-03  + 2.431/rei)
c
                ENDIF
c
          ENDDO            
        ENDDO
c
      ELSE !--not ok_cdnc
c
c-prescribed cloud droplet radius
c
         DO k = 1, MIN(3,klev)
           DO i = 1, klon
               rad_chaud(i,k) = rad_chau2
               rad_chaud_pi(i,k) = rad_chau2
           ENDDO            
         ENDDO
         DO k = MIN(3,klev)+1, klev
           DO i = 1, klon
               rad_chaud(i,k) = rad_chau1
               rad_chaud_pi(i,k) = rad_chau1
           ENDDO            
         ENDDO

      ENDIF !--ok_cdnc
c
c--computation of cloud optical depth and emissivity  
c--in the general case
c
       DO k = 1, klev
          DO i = 1, klon
c
             IF (pclc(i,k) .LE. seuil_neb) THEN
c               
c effective cloud droplet radius (microns) for liquid water clouds: 
c For output diagnostics cloud droplet effective radius [um]
c we multiply here with f * xl (fraction of liquid water
c clouds in the grid cell) to avoid problems in the averaging of the output.
c In the output of IOIPSL, derive the REAL cloud droplet 
c effective radius as re/fl
c
                fl(i,k) = seuil_neb*(1.-zfice(i,k))            
                re(i,k) = rad_chaud(i,k)*fl(i,k)
                rel = 0.
                rei = 0.
                pclc(i,k)   = 0.0
                pcltau(i,k) = 0.0
                pclemi(i,k) = 0.0
c
             ELSE
c
c     -- liquid/ice cloud water paths:
                  
                zflwp_var= 1000.*(1.-zfice(i,k))*pqlwp(i,k)/pclc(i,k)
     &               *rhodz(i,k)
                zfiwp_var= 1000.*zfice(i,k)*pqlwp(i,k)/pclc(i,k)
     &               *rhodz(i,k)
c               
c effective cloud droplet radius (microns) for liquid water clouds: 
c For output diagnostics cloud droplet effective radius [um]
c we multiply here with f * xl (fraction of liquid water
c clouds in the grid cell) to avoid problems in the averaging of the output.
c In the output of IOIPSL, derive the REAL cloud droplet 
c effective radius as re/fl
c 
                fl(i,k) = pclc(i,k)*(1.-zfice(i,k))            
                re(i,k) = rad_chaud(i,k)*fl(i,k)
c 
                rel = rad_chaud(i,k)
c
c for ice clouds: as a function of the ambiant temperature
c [formula used by Iacobellis and Somerville (2000), with an 
c asymptotical value of 3.5 microns at T<-81.4 C added to be 
c consistent with observations of Heymsfield et al. 1986]:
c 2011/05/24 : rei_min = 3.5 becomes a free PARAMETER as well as rei_max=61.29
c
                tc = t(i,k)-273.15
                rei = d_rei_dt*tc + rei_max
                if (tc.le.-81.4) rei = rei_min
c
c-- cloud optical thickness :
c [for liquid clouds, traditional formula, 
c for ice clouds, Ebert & Curry (1992)] 
c                  
                 if (zflwp_var.eq.0.) rel = 1. 
                 if (zfiwp_var.eq.0. .or. rei.le.0.) rei = 1. 
                 pcltau(i,k) = 3.0/2.0 * ( zflwp_var/rel )
     &                 + zfiwp_var * (3.448e-03  + 2.431/rei)
c
c     -- cloud infrared emissivity:
c     [the broadband infrared absorption coefficient is PARAMETERized
c     as a function of the effective cld droplet radius]
c     Ebert and Curry (1992) formula as used by Kiehl & Zender (1995):
c
                  k_ice = k_ice0 + 1.0/rei
c                 
                  pclemi(i,k) = 1.0
     &                 - EXP( -coef_chau*zflwp_var - DF*k_ice*zfiwp_var)
c
             ENDIF
c
             reice(i,k)=rei 
c
             xflwp(i) = xflwp(i)+ xflwc(i,k) * rhodz(i,k)
             xfiwp(i) = xfiwp(i)+ xfiwc(i,k) * rhodz(i,k)
c
          ENDDO
       ENDDO
c
c--if cloud droplet radius is fixed, then pcldtaupi=pcltau
c
      IF (.NOT.ok_cdnc) THEN
         DO k = 1, klev
            DO i = 1, klon
               pcldtaupi(i,k)=pcltau(i,k)
               reice_pi(i,k)=reice(i,k)
            ENDDO
         ENDDO               
      ENDIF
c
      DO k = 1, klev
         DO i = 1, klon
            reliq(i,k)   =rad_chaud(i,k)
            reliq_pi(i,k)=rad_chaud_pi(i,k)
            reice_pi(i,k)=reice(i,k)
         ENDDO
      ENDDO               
C     
C     COMPUTE CLOUD LIQUID PATH AND TOTAL CLOUDINESS
c     IM cf. CR:test: calcul prenant ou non en compte le recouvrement
c     initialisations
c
      DO i=1,klon
         zclear(i)=1.
         zcloud(i)=0.
         zcloudh(i)=0.
         zcloudm(i)=0.
         zcloudl(i)=0.
         pch(i)=1.0
         pcm(i) = 1.0
         pcl(i) = 1.0
         pctlwp(i) = 0.0
      ENDDO
C
c--calculation of liquid water path
c
      DO k = klev, 1, -1
         DO i = 1, klon
            pctlwp(i) = pctlwp(i)+ pqlwp(i,k)*rhodz(i,k)
         ENDDO
      ENDDO
c     
c--calculation of cloud properties with cloud overlap
c
      IF (NOVLP.EQ.1) THEN
         DO k = klev, 1, -1
            DO i = 1, klon
               zclear(i)=zclear(i)*(1.-MAX(pclc(i,k),zcloud(i)))
     &              /(1.-MIN(REAL(zcloud(i), kind=8),1.-ZEPSEC))
               pct(i)=1.-zclear(i) 
               IF (paprs(i,k).LT.prmhc) THEN
                  pch(i) = pch(i)*(1.-MAX(pclc(i,k),zcloudh(i)))
     &                 /(1.-MIN(REAL(zcloudh(i), kind=8),1.-ZEPSEC))
                  zcloudh(i)=pclc(i,k)
               ELSE IF (paprs(i,k).GE.prmhc .AND.
     &                 paprs(i,k).LT.prlmc) THEN
                  pcm(i) = pcm(i)*(1.-MAX(pclc(i,k),zcloudm(i)))
     &                 /(1.-MIN(REAL(zcloudm(i), kind=8),1.-ZEPSEC))
                  zcloudm(i)=pclc(i,k)
               ELSE IF (paprs(i,k).GE.prlmc) THEN 
                  pcl(i) = pcl(i)*(1.-MAX(pclc(i,k),zcloudl(i)))
     &                 /(1.-MIN(REAL(zcloudl(i), kind=8),1.-ZEPSEC))
                  zcloudl(i)=pclc(i,k)
               endif
               zcloud(i)=pclc(i,k)
            ENDDO
         ENDDO
      ELSE IF (NOVLP.EQ.2) THEN
         DO k = klev, 1, -1
            DO i = 1, klon
               zcloud(i)=MAX(pclc(i,k),zcloud(i))
               pct(i)=zcloud(i)
               IF (paprs(i,k).LT.prmhc) THEN
                  pch(i) = MIN(pclc(i,k),pch(i))
               ELSE IF (paprs(i,k).GE.prmhc .AND.
     &                 paprs(i,k).LT.prlmc) THEN
                  pcm(i) = MIN(pclc(i,k),pcm(i))
               ELSE IF (paprs(i,k).GE.prlmc) THEN
                  pcl(i) = MIN(pclc(i,k),pcl(i))
               endif
            ENDDO
         ENDDO
      ELSE IF (NOVLP.EQ.3) THEN
         DO k = klev, 1, -1
            DO i = 1, klon
               zclear(i)=zclear(i)*(1.-pclc(i,k))
               pct(i)=1-zclear(i)
               IF (paprs(i,k).LT.prmhc) THEN
                  pch(i) = pch(i)*(1.0-pclc(i,k))
               ELSE IF (paprs(i,k).GE.prmhc .AND.
     &                 paprs(i,k).LT.prlmc) THEN 
                  pcm(i) = pcm(i)*(1.0-pclc(i,k))
               ELSE IF (paprs(i,k).GE.prlmc) THEN
                  pcl(i) = pcl(i)*(1.0-pclc(i,k))
               endif
            ENDDO
         ENDDO
      ENDIF
C     
      DO i = 1, klon
         pch(i)=1.-pch(i)
         pcm(i)=1.-pcm(i)
         pcl(i)=1.-pcl(i)
      ENDDO
c
c ========================================================
c DIAGNOSTICS CALCULATION FOR CMIP5 PROTOCOL
c ========================================================
c change by Nicolas Yan (LSCE) 
c Cloud Droplet Number Concentration (CDNC) : 3D variable
c Fractionnal cover by liquid water cloud (LCC3D) : 3D variable
c Cloud Droplet Number Concentration at top of cloud (CLDNCL) : 2D variable
c Droplet effective radius at top of cloud (REFFCLWTOP) : 2D variable
c Fractionnal cover by liquid water at top of clouds (LCC) : 2D variable
c
         IF (ok_cdnc) THEN
c
            DO k = 1, klev
               DO i = 1, klon
                  phase3d(i,k)=1-zfice(i,k)
                  IF (pclc(i,k) .LE. seuil_neb) THEN
                     lcc3d(i,k)=seuil_neb*phase3d(i,k)
                  ELSE
                     lcc3d(i,k)=pclc(i,k)*phase3d(i,k)
                  ENDIF
                  scdnc(i,k)=lcc3d(i,k)*cdnc(i,k) ! m-3
               ENDDO
            ENDDO
c
            DO i=1,klon
               lcc(i)=0.
               reffclwtop(i)=0.
               cldncl(i)=0.
               IF(RANDOM .OR. MAXIMUM_RANDOM) tcc(i) = 1.
               IF(MAXIMUM) tcc(i) = 0.
            ENDDO
c
            DO i=1,klon
               DO k=klev-1,1,-1 !From TOA down
c
            ! Test, if the cloud optical depth exceeds the necessary
            ! threshold:

             IF (pcltau(i,k).GT.thres_tau 
     .            .AND. pclc(i,k).GT.thres_neb) THEN

                  IF (MAXIMUM) THEN
                    IF (FIRST) THEN
                       write(*,*)'Hypothese de recouvrement: MAXIMUM'
                       FIRST=.FALSE.
                    ENDIF
                    flag_max= -1.
                    ftmp(i) = MAX(tcc(i),pclc(i,k))
                  ENDIF

                  IF (RANDOM) THEN
                    IF (FIRST) THEN
                       write(*,*)'Hypothese de recouvrement: RANDOM'
                       FIRST=.FALSE.
                    ENDIF
                    flag_max= 1.
                    ftmp(i) = tcc(i) * (1-pclc(i,k))
                  ENDIF

                  IF (MAXIMUM_RANDOM) THEN
                    IF (FIRST) THEN
                       write(*,*)'Hypothese de recouvrement: MAXIMUM_
     .                         RANDOM'
                       FIRST=.FALSE.
                    ENDIF
                    flag_max= 1.
                    ftmp(i) = tcc(i) *
     .              (1. - MAX(pclc(i,k),pclc(i,k+1))) /
     .              (1. - MIN(pclc(i,k+1),1.-thres_neb))
                  ENDIF
c Effective radius of cloud droplet at top of cloud (m)
                  reffclwtop(i) = reffclwtop(i) + rad_chaud(i,k) * 
     .           1.0E-06 * phase3d(i,k) * ( tcc(i) - ftmp(i))*flag_max
c CDNC at top of cloud (m-3)
                  cldncl(i) = cldncl(i) + cdnc(i,k) * phase3d(i,k) * 
     .                 (tcc(i) - ftmp(i))*flag_max
c Liquid Cloud Content at top of cloud
                  lcc(i) = lcc(i) + phase3d(i,k) * (tcc(i)-ftmp(i))*
     .                    flag_max
c Total Cloud Content at top of cloud
                  tcc(i)=ftmp(i)
              
          ENDIF ! is there a visible, not-too-small cloud?  
          ENDDO ! loop over k
c
          IF (RANDOM .OR. MAXIMUM_RANDOM) tcc(i)=1.-tcc(i)
c
         ENDDO ! loop over i

!! Convective and Stratiform Cloud Droplet Effective Radius (REFFCLWC  REFFCLWS)
            DO i = 1, klon
               DO k = 1, klev
! Weight to be used for outputs: eau_liquide*couverture nuageuse
                  lcc3dcon(i,k) =rnebcon(i,k)*phase3d(i,k)*clwcon(i,k)  ! eau liquide convective
                  lcc3dstra(i,k)=pclc(i,k)*pqlwp(i,k)*phase3d(i,k)
                  lcc3dstra(i,k)=lcc3dstra(i,k)-lcc3dcon(i,k)           ! eau liquide stratiforme
                  lcc3dstra(i,k)=MAX(lcc3dstra(i,k),0.0)
! Compute cloud droplet radius as above in meter
                  radius=1.1*((pqlwp(i,k)*pplay(i,k)/(RD * T(i,k)))  
     &               /(4./3*RPI*1000.*cdnc(i,k)) )**(1./3.)
                  radius=MAX(radius, 5.e-6) 
! Convective Cloud Droplet Effective Radius (REFFCLWC) : variable 3D
                  reffclwc(i,k)=radius
                  reffclwc(i,k)=reffclwc(i,k)*lcc3dcon(i,k)
! Stratiform Cloud Droplet Effective Radius (REFFCLWS) : variable 3D
                  reffclws(i,k)=radius
                  reffclws(i,k)=reffclws(i,k)*lcc3dstra(i,k)
               ENDDO !klev
            ENDDO !klon 
c
c Column Integrated Cloud Droplet Number (CLDNVI) : variable 2D
c
            DO i = 1, klon
               cldnvi(i)=0.
               lcc_integrat(i)=0.
               height(i)=0.
               DO k = 1, klev
                  cldnvi(i)=cldnvi(i)+cdnc(i,k)*lcc3d(i,k)*dh(i,k)
                  lcc_integrat(i)=lcc_integrat(i)+lcc3d(i,k)*dh(i,k)
                  height(i)=height(i)+dh(i,k)
               ENDDO ! klev
               lcc_integrat(i)=lcc_integrat(i)/height(i)
               IF (lcc_integrat(i) .LE. 1.0E-03) THEN
                  cldnvi(i)=cldnvi(i)*lcc(i)/seuil_neb
               ELSE
                  cldnvi(i)=cldnvi(i)*lcc(i)/lcc_integrat(i)
               ENDIF
            ENDDO ! klon
            
            DO i = 1, klon
               DO k = 1, klev
                IF (scdnc(i,k) .LE. 0.0)     scdnc(i,k)=0.0
                IF (reffclws(i,k) .LE. 0.0)  reffclws(i,k)=0.0
                IF (reffclwc(i,k) .LE. 0.0)  reffclwc(i,k)=0.0
                IF (lcc3d(i,k) .LE. 0.0)     lcc3d(i,k)=0.0
                IF (lcc3dcon(i,k) .LE. 0.0)  lcc3dcon(i,k)=0.0
                IF (lcc3dstra(i,k) .LE. 0.0) lcc3dstra(i,k)=0.0
               ENDDO
               IF (reffclwtop(i) .LE. 0.0)  reffclwtop(i)=0.0
               IF (cldncl(i) .LE. 0.0)      cldncl(i)=0.0
               IF (cldnvi(i) .LE. 0.0)      cldnvi(i)=0.0
               IF (lcc(i) .LE. 0.0)         lcc(i)=0.0
            ENDDO
c
      ENDIF !ok_cdnc
c
      RETURN
c
      END