!
MODULE module_cu_sas

#ifndef IFORT_KLUDGE
USE module_configure, ONLY: nl_get_start_year, nl_get_start_month, &
                            nl_get_start_day, nl_get_start_hour
#endif
CONTAINS

!-----------------------------------------------------------------
      SUBROUTINE CU_SAS(                                        &
                 DT,ITIMESTEP,STEPCU                            &
                ,RAINCV,HTOP,HBOT                               &
                ,U3D,V3D,W,T3D,QV3D,QC3D,QI3D,PI3D,RHO3D        &
                ,DZ8W,PCPS,P8W,XLAND,CU_ACT_FLAG                &
                ,ids,ide, jds,jde, kds,kde                      &
                ,ims,ime, jms,jme, kms,kme                      &
                ,its,ite, jts,jte, kts,kte                      &
                ,F_QV    ,F_QC    ,F_QR    ,F_QI    ,F_QS       &
                ,RTHCUTEN,RQVCUTEN,RQCCUTEN,RQICUTEN            &
                                                                )

!-------------------------------------------------------------------
      USE MODULE_GFS_MACHINE , ONLY : kind_phys, kind_evod
      USE MODULE_GFS_FUNCPHYS , ONLY : gfuncphys
      USE MODULE_GFS_PHYSCONS, grav => con_g, CP => con_CP, HVAP => con_HVAP  &
     &,             RV => con_RV, FV => con_fvirt, T0C => con_T0C       &
     &,             CVAP => con_CVAP, CLIQ => con_CLIQ                  & 
     &,             EPS => con_eps, EPSM1 => con_epsm1                  &
     &,             ROVCP => con_rocp, RD => con_rd
!-------------------------------------------------------------------
      IMPLICIT NONE
!-------------------------------------------------------------------
!-- U3D         3D u-velocity interpolated to theta points (m/s)
!-- V3D         3D v-velocity interpolated to theta points (m/s)
!-- TH3D	3D potential temperature (K)
!-- T3D         temperature (K)
!-- QV3D        3D water vapor mixing ratio (Kg/Kg)
!-- QC3D        3D cloud mixing ratio (Kg/Kg)
!-- QI3D        3D ice mixing ratio (Kg/Kg)
!-- P8w         3D pressure at full levels (Pa)
!-- Pcps        3D pressure (Pa)
!-- PI3D	3D exner function (dimensionless)
!-- rr3D	3D dry air density (kg/m^3)
!-- RUBLTEN     U tendency due to
!               PBL parameterization (m/s^2)
!-- RVBLTEN     V tendency due to
!               PBL parameterization (m/s^2)
!-- RTHBLTEN    Theta tendency due to
!               PBL parameterization (K/s)
!-- RQVBLTEN    Qv tendency due to
!               PBL parameterization (kg/kg/s)
!-- RQCBLTEN    Qc tendency due to
!               PBL parameterization (kg/kg/s)
!-- RQIBLTEN    Qi tendency due to
!               PBL parameterization (kg/kg/s)
!-- CP          heat capacity at constant pressure for dry air (J/kg/K)
!-- GRAV        acceleration due to gravity (m/s^2)
!-- ROVCP       R/CP
!-- RD          gas constant for dry air (J/kg/K)
!-- ROVG 	R/G
!-- P_QI	species index for cloud ice
!-- dz8w	dz between full levels (m)
!-- z		height above sea level (m)
!-- PSFC        pressure at the surface (Pa)
!-- UST		u* in similarity theory (m/s)
!-- PBL		PBL height (m)
!-- PSIM        similarity stability function for momentum
!-- PSIH        similarity stability function for heat
!-- HFX		upward heat flux at the surface (W/m^2)
!-- QFX		upward moisture flux at the surface (kg/m^2/s)
!-- TSK		surface temperature (K)
!-- GZ1OZ0      log(z/z0) where z0 is roughness length
!-- WSPD        wind speed at lowest model level (m/s)
!-- BR          bulk Richardson number in surface layer
!-- DT		time step (s)
!-- rvovrd      R_v divided by R_d (dimensionless)
!-- EP1         constant for virtual temperature (R_v/R_d - 1) (dimensionless)
!-- KARMAN      Von Karman constant
!-- ids         start index for i in domain
!-- ide         end index for i in domain
!-- jds         start index for j in domain
!-- jde         end index for j in domain
!-- kds         start index for k in domain
!-- kde         end index for k in domain
!-- ims         start index for i in memory
!-- ime         end index for i in memory
!-- jms         start index for j in memory
!-- jme         end index for j in memory
!-- kms         start index for k in memory
!-- kme         end index for k in memory
!-- its         start index for i in tile
!-- ite         end index for i in tile
!-- jts         start index for j in tile
!-- jte         end index for j in tile
!-- kts         start index for k in tile
!-- kte         end index for k in tile
!-------------------------------------------------------------------

      INTEGER ::                        ICLDCK

      INTEGER, INTENT(IN) ::            ids,ide, jds,jde, kds,kde,      &
                                        ims,ime, jms,jme, kms,kme,      &
                                        its,ite, jts,jte, kts,kte,      &
                                        ITIMESTEP,                      &
                                        STEPCU

      REAL,    INTENT(IN) ::                                            &
                                        DT


      REAL,    DIMENSION(ims:ime, jms:jme), INTENT(IN) ::               &
                                        XLAND

      REAL,    DIMENSION(ims:ime, jms:jme), INTENT(INOUT) ::            &
                                        RAINCV

      REAL,    DIMENSION(ims:ime, jms:jme), INTENT(OUT) ::              &
                                        HBOT,                           &
                                        HTOP

      LOGICAL, DIMENSION(IMS:IME,JMS:JME), INTENT(INOUT) ::             &
                                        CU_ACT_FLAG


      REAL,    DIMENSION(ims:ime, kms:kme, jms:jme), INTENT(IN) ::      &
                                        DZ8W,                           &
                                        P8w,                            &
                                        Pcps,                           &
                                        PI3D,                           &
                                        QC3D,                           &
                                        QI3D,                           &
                                        QV3D,                           &
                                        RHO3D,                          &
                                        T3D,                            &
                                        U3D,                            &
                                        V3D,                            &
                                        W

!--------------------------- OPTIONAL VARS ----------------------------
                                                                                                      
      REAL, DIMENSION(ims:ime, kms:kme, jms:jme),                       &
               OPTIONAL, INTENT(INOUT) ::                               &
                                        RQCCUTEN,                       &
                                        RQICUTEN,                       &
                                        RQVCUTEN,                       &
                                        RTHCUTEN
                                                                                                      
!
! Flags relating to the optional tendency arrays declared above
! Models that carry the optional tendencies will provdide the
! optional arguments at compile time; these flags all the model
! to determine at run-time whether a particular tracer is in
! use or not.
!
   LOGICAL, OPTIONAL ::                                      &
                                                   F_QV      &
                                                  ,F_QC      &
                                                  ,F_QR      &
                                                  ,F_QI      &
                                                  ,F_QS
 

!--------------------------- LOCAL VARS ------------------------------

      REAL,    DIMENSION(ims:ime, jms:jme) ::                           &
                                        PSFC

      REAL     (kind=kind_evod),save :: seed0
!      REAL     (kind=kind_evod) :: seed0
      REAL     (kind=kind_evod) ::      wrk

      REAL     (kind=kind_phys) ::                                      &
                                        DELT,                           &
                                        DPSHC,                          &
                                        RDELT,                          &
                                        RSEED

      REAL     (kind=kind_phys), DIMENSION(ids:ide,jds:jde) ::          & 
                                        RANNUM

      REAL     (kind=kind_phys), DIMENSION(its:ite) ::                  &
                                        CLDWRK,                         &
                                        PS,                             &
                                        RCS,                            &
                                        RN,                             &
                                        SLIMSK,                         &
                                        XKT2

      REAL     (kind=kind_phys), DIMENSION(its:ite, kts:kte+1) ::       &
                                        PRSI                            

      REAL     (kind=kind_phys), DIMENSION(its:ite, kts:kte) ::         &
                                        DEL,                            &
                                        DOT,                            &
                                        PHIL,                           &
                                        PRSL,                           &
                                        PRSLK,                          &
                                        Q1,                             & 
                                        T1,                             & 
                                        U1,                             & 
                                        V1,                             & 
                                        ZI,                             & 
                                        ZL 

      REAL     (kind=kind_phys), DIMENSION(its:ite, kts:kte, 2) ::      &
                                        QL 

      INTEGER, DIMENSION(its:ite) ::                                    &
                                        KBOT,                           &
                                        KTOP,                           &
                                        KUO

      INTEGER ::                                                        &
                                        I,                              &
!                                        IGPVS,                          &
                                        IM,                             &
                                        J,                              &
                                        JCAP,                           &
                                        K,                              &
                                        KM,                             &
                                        KP,                             &
                                        KX,                             &
                                        NCLOUD 

      INTEGER :: start_year,start_month,start_day,start_hour

      integer :: iseed
!      integer, save :: krsize
      integer :: krsize
      integer,  allocatable ::  nrnd(:)
      real :: fsec

!      DATA IGPVS/0/

!-----------------------------------------------------------------------
!
!***  CHECK TO SEE IF THIS IS A CONVECTION TIMESTEP
!
      ICLDCK=MOD(ITIMESTEP,STEPCU)
!-----------------------------------------------------------------------


   IF(ICLDCK.EQ.0.OR.ITIMESTEP.EQ.0)THEN

      DO J=JTS,JTE
         DO I=ITS,ITE
            CU_ACT_FLAG(I,J)=.TRUE.
         ENDDO
      ENDDO
 
      IM=ITE-ITS+1
      KX=KTE-KTS+1
      JCAP=126
      DPSHC=30_kind_phys
      DELT=DT*STEPCU
      RDELT=1./DELT
      NCLOUD=1


   DO J=jms,jme
     DO I=ims,ime
       PSFC(i,j)=P8w(i,kms,j)
     ENDDO
   ENDDO

   if(itimestep.eq.0) then
      CALL GFUNCPHYS

        CALL nl_get_start_year(1,start_year)   
        CALL nl_get_start_month(1,start_month)   
        CALL nl_get_start_day(1,start_day)   
        CALL nl_get_start_hour(1,start_hour)   

        call random_seed(size=krsize)
        if (.not. allocated (nrnd)) allocate (nrnd(krsize))

        seed0 = start_year + start_month + start_day + start_hour
        nrnd = start_hour + start_day*24
        call random_seed
        call random_seed(put=nrnd)
        call random_number(wrk)
        seed0 = seed0 + nint(wrk*1000.0)
  
   endif

   fsec = ITIMESTEP*DT
   iseed = mod(100.0*sqrt(fsec),1.0e9) + 1 + seed0
   call random_seed(size=krsize)
   if (.not. allocated (nrnd)) allocate (nrnd(krsize))
   nrnd = iseed
   call random_seed
   call random_seed(put=nrnd)
   call random_number(rannum)

!   igpvs=1

!-------------  J LOOP (OUTER) --------------------------------------------------

   DO J=jts,jte

! --------------- compute zi and zl -----------------------------------------
      DO i=its,ite
        ZI(I,KTS)=0.0
      ENDDO

      DO k=kts+1,kte
        KM=K-1
        DO i=its,ite
          ZI(I,K)=ZI(I,KM)+dz8w(i,km,j)
        ENDDO
      ENDDO

      DO k=kts+1,kte
        KM=K-1
        DO i=its,ite
          ZL(I,KM)=(ZI(I,K)+ZI(I,KM))*0.5
        ENDDO
      ENDDO

      DO i=its,ite
        ZL(I,KTE)=2.*ZI(I,KTE)-ZL(I,KTE-1)
      ENDDO

! --------------- end compute zi and zl -------------------------------------


!      call random_number(XKT2)
      DO i=its,ite
        xkt2(i)=rannum(i,j)
        PS(i)=PSFC(i,j)*.001
        RCS(i)=1.
        SLIMSK(i)=ABS(XLAND(i,j)-2.)
      ENDDO

      DO i=its,ite
        PRSI(i,kts)=PS(i)
      ENDDO

      DO k=kts,kte
        kp=k+1
        DO i=its,ite
          PRSL(I,K)=Pcps(i,k,j)*.001
          PHIL(I,K)=ZL(I,K)*GRAV
          DOT(i,k)=-5.0E-4*GRAV*rho3d(i,k,j)*(w(i,k,j)+w(i,kp,j))
        ENDDO
      ENDDO

      DO k=kts,kte
        DO i=its,ite
          DEL(i,k)=PRSL(i,k)*GRAV/RD*dz8w(i,k,j)/T3D(i,k,j)
          U1(i,k)=U3D(i,k,j)
          V1(i,k)=V3D(i,k,j)
          Q1(i,k)=QV3D(i,k,j)/(1.+QV3D(i,k,j))
          T1(i,k)=T3D(i,k,j)
          QL(i,k,1)=QI3D(i,k,j)/(1.+QI3D(i,k,j))
          QL(i,k,2)=QC3D(i,k,j)/(1.+QC3D(i,k,j))
          PRSLK(I,K)=(PRSL(i,k)*.01)**ROVCP
        ENDDO
      ENDDO

      DO k=kts+1,kte+1
        km=k-1
        DO i=its,ite
          PRSI(i,k)=PRSI(i,km)-del(i,km) 
        ENDDO
      ENDDO


      CALL SASCNV(IM,IM,KX,JCAP,DELT,DEL,PRSL,PS,PHIL,                  &
                  QL,Q1,T1,U1,V1,RCS,CLDWRK,RN,KBOT,                    &
                  KTOP,KUO,SLIMSK,DOT,XKT2,NCLOUD)

      CALL SHALCV(IM,IM,KX,DELT,DEL,PRSI,PRSL,PRSLK,KUO,Q1,T1,DPSHC)

      DO I=ITS,ITE
        RAINCV(I,J)=RN(I)*1000./STEPCU
        HBOT(I,J)=KBOT(I)
        HTOP(I,J)=KTOP(I)
      ENDDO

      DO K=KTS,KTE
        DO I=ITS,ITE
          RTHCUTEN(I,K,J)=(T1(I,K)-T3D(I,K,J))/PI3D(I,K,J)*RDELT
          RQVCUTEN(I,K,J)=(Q1(I,K)/(1.-q1(i,k))-QV3D(I,K,J))*RDELT
        ENDDO
      ENDDO

      IF(PRESENT(RQCCUTEN))THEN
        IF ( F_QC ) THEN
          DO K=KTS,KTE
            DO I=ITS,ITE
              RQCCUTEN(I,K,J)=(QL(I,K,2)/(1.-ql(i,k,2))-QC3D(I,K,J))*RDELT
            ENDDO
          ENDDO
        ENDIF
      ENDIF

      IF(PRESENT(RQICUTEN))THEN
        IF ( F_QI ) THEN
          DO K=KTS,KTE
            DO I=ITS,ITE
              RQICUTEN(I,K,J)=(QL(I,K,1)/(1.-ql(i,k,1))-QI3D(I,K,J))*RDELT
            ENDDO
          ENDDO
        ENDIF
      ENDIF


   ENDDO

   ENDIF

   END SUBROUTINE CU_SAS

!====================================================================
   SUBROUTINE sasinit(RTHCUTEN,RQVCUTEN,RQCCUTEN,RQICUTEN,              &
                     RESTART,P_QC,P_QI,P_FIRST_SCALAR,                  &
                     allowed_to_read,                                   &
                     ids, ide, jds, jde, kds, kde,                      &
                     ims, ime, jms, jme, kms, kme,                      &
                     its, ite, jts, jte, kts, kte)
!--------------------------------------------------------------------
   IMPLICIT NONE
!--------------------------------------------------------------------
   LOGICAL , INTENT(IN)           ::  allowed_to_read,restart
   INTEGER , INTENT(IN)           ::  ids, ide, jds, jde, kds, kde, &
                                      ims, ime, jms, jme, kms, kme, &
                                      its, ite, jts, jte, kts, kte
   INTEGER , INTENT(IN)           ::  P_FIRST_SCALAR, P_QI, P_QC

   REAL,     DIMENSION( ims:ime , kms:kme , jms:jme ) , INTENT(OUT) ::  &
                                                              RTHCUTEN, &
                                                              RQVCUTEN, &
                                                              RQCCUTEN, &
                                                              RQICUTEN

   INTEGER :: i, j, k, itf, jtf, ktf

   jtf=min0(jte,jde-1)
   ktf=min0(kte,kde-1)
   itf=min0(ite,ide-1)

   IF(.not.restart)THEN
     DO j=jts,jtf
     DO k=kts,ktf
     DO i=its,itf
       RTHCUTEN(i,k,j)=0.
       RQVCUTEN(i,k,j)=0.
     ENDDO
     ENDDO
     ENDDO

     IF (P_QC .ge. P_FIRST_SCALAR) THEN
        DO j=jts,jtf
        DO k=kts,ktf
        DO i=its,itf
           RQCCUTEN(i,k,j)=0.
        ENDDO
        ENDDO
        ENDDO
     ENDIF

     IF (P_QI .ge. P_FIRST_SCALAR) THEN
        DO j=jts,jtf
        DO k=kts,ktf
        DO i=its,itf
           RQICUTEN(i,k,j)=0.
        ENDDO
        ENDDO
        ENDDO
     ENDIF
   ENDIF

      END SUBROUTINE sasinit

! ------------------------------------------------------------------------

      SUBROUTINE SASCNV(IM,IX,KM,JCAP,DELT,DEL,PRSL,PS,PHIL,QL,         &
!     SUBROUTINE SASCNV(IM,IX,KM,JCAP,DLT,DEL,PRSL,PHIL,QL,             &
     &       Q1,T1,U1,V1,RCS,CLDWRK,RN,KBOT,KTOP,KUO,SLIMSK,            &
     &       DOT,XKT2,ncloud)
!  for cloud water version
!     parameter(ncloud=0)
!     SUBROUTINE SASCNV(KM,JCAP,DELT,DEL,SL,SLK,PS,QL,
!    &       Q1,T1,U1,V1,RCS,CLDWRK,RN,KBOT,KTOP,KUO,SLIMSK,
!    &       DOT,xkt2,ncloud)
!
      USE MODULE_GFS_MACHINE , ONLY : kind_phys,kind_evod
      USE MODULE_GFS_FUNCPHYS ,ONLY : fpvs
      USE MODULE_GFS_PHYSCONS, grav => con_g, CP => con_CP, HVAP => con_HVAP &
     &,             RV => con_RV, FV => con_fvirt, T0C => con_T0C       &
     &,             CVAP => con_CVAP, CLIQ => con_CLIQ                  &
     &,             EPS => con_eps, EPSM1 => con_epsm1

      implicit none
!
!     include 'constant.h'
!
      integer            IM, IX,  KM, JCAP, ncloud,                     &
     &                   KBOT(IM), KTOP(IM), KUO(IM)
      real(kind=kind_phys) DELT
      real(kind=kind_phys) PS(IM),      DEL(IX,KM),  PRSL(IX,KM),       &
!     real(kind=kind_phys)              DEL(IX,KM),  PRSL(IX,KM),
     &                     QL(IX,KM,2), Q1(IX,KM),   T1(IX,KM),         &
     &                     U1(IX,KM),   V1(IX,KM),   RCS(IM),           &
     &                     CLDWRK(IM),  RN(IM),      SLIMSK(IM),        &
     &                     DOT(IX,KM),  XKT2(IM),    PHIL(IX,KM)
!
      integer              I, INDX, jmn, k, knumb, latd, lond, km1
!
      real(kind=kind_phys) adw,     alpha,   alphal,  alphas,           &
     &                     aup,     beta,    betal,   betas,            &
     &                     c0,      cpoel,   dellat,  delta,            &
     &                     desdt,   deta,    detad,   dg,               &
     &                     dh,      dhh,     dlnsig,  dp,               &
     &                     dq,      dqsdp,   dqsdt,   dt,               &
     &                     dt2,     dtmax,   dtmin,   dv1,              &
     &                     dv1q,    dv2,     dv2q,    dv1u,             &
     &                     dv1v,    dv2u,    dv2v,    dv3u,             &
     &                     dv3v,    dv3,     dv3q,    dvq1,             &
     &                     dz,      dz1,     e1,      edtmax,           &
     &                     edtmaxl, edtmaxs, el2orc,  elocp,            &
     &                     es,      etah,                               &
     &                     evef,    evfact,  evfactl, fact1,            &
     &                     fact2,   factor,  fjcap,   fkm,              &
     &                     fuv,     g,       gamma,   onemf,            &
     &                     onemfu,  pdetrn,  pdpdwn,  pprime,           &
     &                     qc,      qlk,     qrch,    qs,               &
     &                     rain,    rfact,   shear,   tem1,             &
     &                     tem2,    terr,    val,     val1,             &
     &                     val2,    w1,      w1l,     w1s,              &
     &                     w2,      w2l,     w2s,     w3,               &
     &                     w3l,     w3s,     w4,      w4l,              & 
     &                     w4s,     xdby,    xpw,     xpwd,             & 
     &                     xqc,     xqrch,   xlambu,  mbdt,             &
     &                     tem
!
!
      integer              JMIN(IM), KB(IM), KBCON(IM), KBDTR(IM),      & 
     &                     KT2(IM),  KTCON(IM), LMIN(IM),               &
     &                     kbm(IM),  kbmax(IM), kmax(IM)
!
      real(kind=kind_phys) AA1(IM),     ACRT(IM),   ACRTFCT(IM),        & 
     &                     DELHBAR(IM), DELQ(IM),   DELQ2(IM),          &
     &                     DELQBAR(IM), DELQEV(IM), DELTBAR(IM),        &
     &                     DELTV(IM),   DTCONV(IM), EDT(IM),            &
     &                     EDTO(IM),    EDTX(IM),   FLD(IM),            &
     &                     HCDO(IM),    HKBO(IM),   HMAX(IM),           &
     &                     HMIN(IM),    HSBAR(IM),  UCDO(IM),           &
     &                     UKBO(IM),    VCDO(IM),   VKBO(IM),           &
     &                     PBCDIF(IM),  PDOT(IM),   PO(IM,KM),          &
     &                                  PWAVO(IM),  PWEVO(IM),          &
!    &                     PSFC(IM),    PWAVO(IM),  PWEVO(IM),          &
     &                     QCDO(IM),    QCOND(IM),  QEVAP(IM),          &
     &                     QKBO(IM),    RNTOT(IM),  VSHEAR(IM),         &
     &                     XAA0(IM),    XHCD(IM),   XHKB(IM),           & 
     &                     XK(IM),      XLAMB(IM),  XLAMD(IM),          &
     &                     XMB(IM),     XMBMAX(IM), XPWAV(IM),          &
     &                     XPWEV(IM),   XQCD(IM),   XQKB(IM)
!
!  PHYSICAL PARAMETERS
      PARAMETER(G=grav)
      PARAMETER(CPOEL=CP/HVAP,ELOCP=HVAP/CP,                            &
     &          EL2ORC=HVAP*HVAP/(RV*CP))
      PARAMETER(TERR=0.,C0=.002,DELTA=fv)
      PARAMETER(FACT1=(CVAP-CLIQ)/RV,FACT2=HVAP/RV-FACT1*T0C)
!  LOCAL VARIABLES AND ARRAYS
      real(kind=kind_phys) PFLD(IM,KM),    TO(IM,KM),     QO(IM,KM),    &
     &                     UO(IM,KM),      VO(IM,KM),     QESO(IM,KM)
!  cloud water
      real(kind=kind_phys) QLKO_KTCON(IM), DELLAL(IM),    TVO(IM,KM),   &
     &                     DBYO(IM,KM),    ZO(IM,KM),     SUMZ(IM,KM),  &
     &                     SUMH(IM,KM),    HEO(IM,KM),    HESO(IM,KM),  &
     &                     QRCD(IM,KM),    DELLAH(IM,KM), DELLAQ(IM,KM),&
     &                     DELLAU(IM,KM),  DELLAV(IM,KM), HCKO(IM,KM),  &
     &                     UCKO(IM,KM),    VCKO(IM,KM),   QCKO(IM,KM),  &
     &                     ETA(IM,KM),     ETAU(IM,KM),   ETAD(IM,KM),  &
     &                     QRCDO(IM,KM),   PWO(IM,KM),    PWDO(IM,KM),  &
     &                     RHBAR(IM),      TX1(IM)
!
      LOGICAL TOTFLG, CNVFLG(IM), DWNFLG(IM), DWNFLG2(IM), FLG(IM)
!
      real(kind=kind_phys) PCRIT(15), ACRITT(15), ACRIT(15)
!     SAVE PCRIT, ACRITT
      DATA PCRIT/850.,800.,750.,700.,650.,600.,550.,500.,450.,400.,     &
     &           350.,300.,250.,200.,150./
      DATA ACRITT/.0633,.0445,.0553,.0664,.075,.1082,.1521,.2216,       &
     &           .3151,.3677,.41,.5255,.7663,1.1686,1.6851/
!  GDAS DERIVED ACRIT
!     DATA ACRITT/.203,.515,.521,.566,.625,.665,.659,.688,              & 
!    &            .743,.813,.886,.947,1.138,1.377,1.896/
!
      real(kind=kind_phys) TF, TCR, TCRF, RZERO, RONE
      parameter (TF=233.16, TCR=263.16, TCRF=1.0/(TCR-TF))
      parameter (RZERO=0.0,RONE=1.0)
!-----------------------------------------------------------------------
!
      km1 = km - 1
!  INITIALIZE ARRAYS
!
      DO I=1,IM
        RN(I)=0.
        KBOT(I)=KM+1
        KTOP(I)=0
        KUO(I)=0
        CNVFLG(I) = .TRUE.
        DTCONV(I) = 3600.
        CLDWRK(I) = 0.
        PDOT(I) = 0.
        KT2(I) = 0
        QLKO_KTCON(I) = 0.
        DELLAL(I) = 0.
      ENDDO
!!
      DO K = 1, 15
        ACRIT(K) = ACRITT(K) * (975. - PCRIT(K))
      ENDDO
      DT2 = DELT
!cmr  dtmin = max(dt2,1200.)
      val   =         1200.
      dtmin = max(dt2, val )
!cmr  dtmax = max(dt2,3600.)
      val   =         3600.
      dtmax = max(dt2, val )
!  MODEL TUNABLE PARAMETERS ARE ALL HERE
      MBDT    = 10.
      EDTMAXl = .3
      EDTMAXs = .3
      ALPHAl  = .5
      ALPHAs  = .5
      BETAl   = .15
      betas   = .15
      BETAl   = .05
      betas   = .05
!     EVEF    = 0.07
      evfact  = 0.3
      evfactl = 0.3
      PDPDWN  = 0.
      PDETRN  = 200.
      xlambu  = 1.e-4
      fjcap   = (float(jcap) / 126.) ** 2
!cmr  fjcap   = max(fjcap,1.)
      val     =           1.
      fjcap   = max(fjcap,val)
      fkm     = (float(km) / 28.) ** 2
!cmr  fkm     = max(fkm,1.)
      fkm     = max(fkm,val)
      W1l     = -8.E-3 
      W2l     = -4.E-2
      W3l     = -5.E-3 
      W4l     = -5.E-4
      W1s     = -2.E-4
      W2s     = -2.E-3
      W3s     = -1.E-3
      W4s     = -2.E-5
!CCCC IF(IM.EQ.384) THEN
        LATD  = 92
        lond  = 189
!CCCC ELSEIF(IM.EQ.768) THEN
!CCCC   LATD = 80
!CCCC ELSE
!CCCC   LATD = 0
!CCCC ENDIF
!
!  DEFINE TOP LAYER FOR SEARCH OF THE DOWNDRAFT ORIGINATING LAYER
!  AND THE MAXIMUM THETAE FOR UPDRAFT
!
      DO I=1,IM
        KBMAX(I) = KM
        KBM(I)   = KM
        KMAX(I)  = KM
        TX1(I)   = 1.0 / PS(I)
      ENDDO
!     
      DO K = 1, KM
        DO I=1,IM
          IF (prSL(I,K)*tx1(I) .GT. 0.45) KBMAX(I) = K + 1
          IF (prSL(I,K)*tx1(I) .GT. 0.70) KBM(I)   = K + 1
          IF (prSL(I,K)*tx1(I) .GT. 0.04) KMAX(I)  = MIN(KM,K + 1)
        ENDDO
      ENDDO
      DO I=1,IM
        KBMAX(I) = MIN(KBMAX(I),KMAX(I))
        KBM(I)   = MIN(KBM(I),KMAX(I))
      ENDDO
!
!   CONVERT SURFACE PRESSURE TO MB FROM CB
!
!!
      DO K = 1, KM
        DO I=1,IM
          if (K .le. kmax(i)) then
            PFLD(I,k) = PRSL(I,K) * 10.0
            PWO(I,k)  = 0.
            PWDO(I,k) = 0.
            TO(I,k)   = T1(I,k)
            QO(I,k)   = Q1(I,k)
            UO(I,k)   = U1(I,k)
            VO(I,k)   = V1(I,k)
            DBYO(I,k) = 0.
            SUMZ(I,k) = 0.
            SUMH(I,k) = 0.
          endif
        ENDDO
      ENDDO

!
!  COLUMN VARIABLES
!  P IS PRESSURE OF THE LAYER (MB)
!  T IS TEMPERATURE AT T-DT (K)..TN
!  Q IS MIXING RATIO AT T-DT (KG/KG)..QN
!  TO IS TEMPERATURE AT T+DT (K)... THIS IS AFTER ADVECTION AND TURBULAN
!  QO IS MIXING RATIO AT T+DT (KG/KG)..Q1
!
      DO K = 1, KM
        DO I=1,IM
          if (k .le. kmax(i)) then
         !jfe        QESO(I,k) = 10. * FPVS(T1(I,k))
         !
            QESO(I,k) = 0.01 * fpvs(T1(I,K))      ! fpvs is in Pa
         !
            QESO(I,k) = EPS * QESO(I,k) / (PFLD(I,k) + EPSM1*QESO(I,k))
         !cmr        QESO(I,k) = MAX(QESO(I,k),1.E-8)
            val1      =             1.E-8
            QESO(I,k) = MAX(QESO(I,k), val1)
         !cmr        QO(I,k)   = max(QO(I,k),1.e-10)
            val2      =           1.e-10
            QO(I,k)   = max(QO(I,k), val2 )
         !           QO(I,k)   = MIN(QO(I,k),QESO(I,k))
            TVO(I,k)  = TO(I,k) + DELTA * TO(I,k) * QO(I,k)
          endif
        ENDDO
      ENDDO

!
!  HYDROSTATIC HEIGHT ASSUME ZERO TERR
!
      DO K = 1, KM
        DO I=1,IM
          ZO(I,k) = PHIL(I,k) / G
        ENDDO
      ENDDO
!  COMPUTE MOIST STATIC ENERGY
      DO K = 1, KM
        DO I=1,IM
          if (K .le. kmax(i)) then
!           tem       = G * ZO(I,k) + CP * TO(I,k)
            tem       = PHIL(I,k) + CP * TO(I,k)
            HEO(I,k)  = tem  + HVAP * QO(I,k)
            HESO(I,k) = tem  + HVAP * QESO(I,k)
!           HEO(I,k)  = MIN(HEO(I,k),HESO(I,k))
          endif
        ENDDO
      ENDDO
!
!  DETERMINE LEVEL WITH LARGEST MOIST STATIC ENERGY
!  THIS IS THE LEVEL WHERE UPDRAFT STARTS
!
      DO I=1,IM
        HMAX(I) = HEO(I,1)
        KB(I) = 1
      ENDDO
!!
      DO K = 2, KM
        DO I=1,IM
          if (k .le. kbm(i)) then
            IF(HEO(I,k).GT.HMAX(I).AND.CNVFLG(I)) THEN
              KB(I)   = K
              HMAX(I) = HEO(I,k)
            ENDIF
          endif
        ENDDO
      ENDDO
!     DO K = 1, KMAX - 1
!         TOL(k) = .5 * (TO(I,k) + TO(I,k+1))
!         QOL(k) = .5 * (QO(I,k) + QO(I,k+1))
!         QESOL(I,k) = .5 * (QESO(I,k) + QESO(I,k+1))
!         HEOL(I,k) = .5 * (HEO(I,k) + HEO(I,k+1))
!         HESOL(I,k) = .5 * (HESO(I,k) + HESO(I,k+1))
!     ENDDO
      DO K = 1, KM1
        DO I=1,IM
          if (k .le. kmax(i)-1) then
            DZ      = .5 * (ZO(I,k+1) - ZO(I,k))
            DP      = .5 * (PFLD(I,k+1) - PFLD(I,k))
!jfe        ES      = 10. * FPVS(TO(I,k+1))
!
            ES      = 0.01 * fpvs(TO(I,K+1))      ! fpvs is in Pa
!
            PPRIME  = PFLD(I,k+1) + EPSM1 * ES
            QS      = EPS * ES / PPRIME
            DQSDP   = - QS / PPRIME
            DESDT   = ES * (FACT1 / TO(I,k+1) + FACT2 / (TO(I,k+1)**2))
            DQSDT   = QS * PFLD(I,k+1) * DESDT / (ES * PPRIME)
            GAMMA   = EL2ORC * QESO(I,k+1) / (TO(I,k+1)**2)
            DT      = (G * DZ + HVAP * DQSDP * DP) / (CP * (1. + GAMMA))
            DQ      = DQSDT * DT + DQSDP * DP
            TO(I,k) = TO(I,k+1) + DT
            QO(I,k) = QO(I,k+1) + DQ
            PO(I,k) = .5 * (PFLD(I,k) + PFLD(I,k+1))
          endif
        ENDDO
      ENDDO
!
      DO K = 1, KM1
        DO I=1,IM
          if (k .le. kmax(I)-1) then
!jfe        QESO(I,k) = 10. * FPVS(TO(I,k))
!
            QESO(I,k) = 0.01 * fpvs(TO(I,K))      ! fpvs is in Pa
!
            QESO(I,k) = EPS * QESO(I,k) / (PO(I,k) + EPSM1*QESO(I,k))
!cmr        QESO(I,k) = MAX(QESO(I,k),1.E-8)
            val1      =             1.E-8
            QESO(I,k) = MAX(QESO(I,k), val1)
!cmr        QO(I,k)   = max(QO(I,k),1.e-10)
            val2      =           1.e-10
            QO(I,k)   = max(QO(I,k), val2 )
!           QO(I,k)   = MIN(QO(I,k),QESO(I,k))
            HEO(I,k)  = .5 * G * (ZO(I,k) + ZO(I,k+1)) +                &
     &                  CP * TO(I,k) + HVAP * QO(I,k)
            HESO(I,k) = .5 * G * (ZO(I,k) + ZO(I,k+1)) +                & 
     &                  CP * TO(I,k) + HVAP * QESO(I,k)
            UO(I,k)   = .5 * (UO(I,k) + UO(I,k+1))
            VO(I,k)   = .5 * (VO(I,k) + VO(I,k+1))
          endif
        ENDDO
      ENDDO
!     k = kmax
!       HEO(I,k) = HEO(I,k)
!       hesol(k) = HESO(I,k)
!      IF(LAT.EQ.LATD.AND.lon.eq.lond.and.CNVFLG(I)) THEN
!        PRINT *, '   HEO ='
!        PRINT 6001, (HEO(I,K),K=1,KMAX)
!        PRINT *, '   HESO ='
!        PRINT 6001, (HESO(I,K),K=1,KMAX)
!        PRINT *, '   TO ='
!        PRINT 6002, (TO(I,K)-273.16,K=1,KMAX)
!        PRINT *, '   QO ='
!        PRINT 6003, (QO(I,K),K=1,KMAX)
!        PRINT *, '   QSO ='
!        PRINT 6003, (QESO(I,K),K=1,KMAX)
!      ENDIF
!
!  LOOK FOR CONVECTIVE CLOUD BASE AS THE LEVEL OF FREE CONVECTION
!
      DO I=1,IM
        IF(CNVFLG(I)) THEN
          INDX    = KB(I)
          HKBO(I) = HEO(I,INDX)
          QKBO(I) = QO(I,INDX)
          UKBO(I) = UO(I,INDX)
          VKBO(I) = VO(I,INDX)
        ENDIF
        FLG(I)    = CNVFLG(I)
        KBCON(I)  = KMAX(I)
      ENDDO
!!
      DO K = 1, KM
        DO I=1,IM
          if (k .le. kbmax(i)) then
            IF(FLG(I).AND.K.GT.KB(I)) THEN
              HSBAR(I)   = HESO(I,k)
              IF(HKBO(I).GT.HSBAR(I)) THEN
                FLG(I)   = .FALSE.
                KBCON(I) = K
              ENDIF
            ENDIF
          endif
        ENDDO
      ENDDO
      DO I=1,IM
        IF(CNVFLG(I)) THEN
          PBCDIF(I) = -PFLD(I,KBCON(I)) + PFLD(I,KB(I))
          PDOT(I)   = 10.* DOT(I,KBCON(I))
          IF(PBCDIF(I).GT.150.)    CNVFLG(I) = .FALSE.
          IF(KBCON(I).EQ.KMAX(I))  CNVFLG(I) = .FALSE.
        ENDIF
      ENDDO
!!
      TOTFLG = .TRUE.
      DO I=1,IM
        TOTFLG = TOTFLG .AND. (.NOT. CNVFLG(I))
      ENDDO
      IF(TOTFLG) RETURN
!  FOUND LFC, CAN DEFINE REST OF VARIABLES
 6001 FORMAT(2X,-2P10F12.2)
 6002 FORMAT(2X,10F12.2)
 6003 FORMAT(2X,3P10F12.2)

!
!  DETERMINE ENTRAINMENT RATE BETWEEN KB AND KBCON
!
      DO I = 1, IM
        alpha = alphas
        if(SLIMSK(I).eq.1.) alpha = alphal
        IF(CNVFLG(I)) THEN
          IF(KB(I).EQ.1) THEN
            DZ = .5 * (ZO(I,KBCON(I)) + ZO(I,KBCON(I)-1)) - ZO(I,1)
          ELSE
            DZ = .5 * (ZO(I,KBCON(I)) + ZO(I,KBCON(I)-1))               &
     &         - .5 * (ZO(I,KB(I)) + ZO(I,KB(I)-1))
          ENDIF
          IF(KBCON(I).NE.KB(I)) THEN
!cmr        XLAMB(I) = -ALOG(ALPHA) / DZ
            XLAMB(I) = - LOG(ALPHA) / DZ
          ELSE
            XLAMB(I) = 0.
          ENDIF
        ENDIF
      ENDDO
!  DETERMINE UPDRAFT MASS FLUX
      DO K = 1, KM
        DO I = 1, IM
          if (k .le. kmax(i) .and. CNVFLG(I)) then
            ETA(I,k)  = 1.
            ETAU(I,k) = 1.
          ENDIF
        ENDDO
      ENDDO
      DO K = KM1, 2, -1
        DO I = 1, IM
          if (k .le. kbmax(i)) then
            IF(CNVFLG(I).AND.K.LT.KBCON(I).AND.K.GE.KB(I)) THEN
              DZ        = .5 * (ZO(I,k+1) - ZO(I,k-1))
              ETA(I,k)  = ETA(I,k+1) * EXP(-XLAMB(I) * DZ)
              ETAU(I,k) = ETA(I,k)
            ENDIF
          endif
        ENDDO
      ENDDO
      DO I = 1, IM
        IF(CNVFLG(I).AND.KB(I).EQ.1.AND.KBCON(I).GT.1) THEN
          DZ = .5 * (ZO(I,2) - ZO(I,1))
          ETA(I,1) = ETA(I,2) * EXP(-XLAMB(I) * DZ)
          ETAU(I,1) = ETA(I,1)
        ENDIF
      ENDDO
!
!  WORK UP UPDRAFT CLOUD PROPERTIES
!
      DO I = 1, IM
        IF(CNVFLG(I)) THEN
          INDX         = KB(I)
          HCKO(I,INDX) = HKBO(I)
          QCKO(I,INDX) = QKBO(I)
          UCKO(I,INDX) = UKBO(I)
          VCKO(I,INDX) = VKBO(I)
          PWAVO(I)     = 0.
        ENDIF
      ENDDO
!
!  CLOUD PROPERTY BELOW CLOUD BASE IS MODIFIED BY THE ENTRAINMENT PROCES
!
      DO K = 2, KM1
        DO I = 1, IM
          if (k .le. kmax(i)-1) then
            IF(CNVFLG(I).AND.K.GT.KB(I).AND.K.LE.KBCON(I)) THEN
              FACTOR = ETA(I,k-1) / ETA(I,k)
              ONEMF = 1. - FACTOR
              HCKO(I,k) = FACTOR * HCKO(I,k-1) + ONEMF *                &
     &                    .5 * (HEO(I,k) + HEO(I,k+1))
              UCKO(I,k) = FACTOR * UCKO(I,k-1) + ONEMF *                & 
     &                    .5 * (UO(I,k) + UO(I,k+1))
              VCKO(I,k) = FACTOR * VCKO(I,k-1) + ONEMF *                &
     &                    .5 * (VO(I,k) + VO(I,k+1))
              DBYO(I,k) = HCKO(I,k) - HESO(I,k)
            ENDIF
            IF(CNVFLG(I).AND.K.GT.KBCON(I)) THEN
              HCKO(I,k) = HCKO(I,k-1)
              UCKO(I,k) = UCKO(I,k-1)
              VCKO(I,k) = VCKO(I,k-1)
              DBYO(I,k) = HCKO(I,k) - HESO(I,k)
            ENDIF
          endif
        ENDDO
      ENDDO
!  DETERMINE CLOUD TOP
      DO I = 1, IM
        FLG(I) = CNVFLG(I)
        KTCON(I) = 1
      ENDDO
!     DO K = 2, KMAX
!       KK = KMAX - K + 1
!         IF(DBYO(I,kK).GE.0..AND.FLG(I).AND.KK.GT.KBCON(I)) THEN
!           KTCON(I) = KK + 1
!           FLG(I) = .FALSE.
!         ENDIF
!     ENDDO
      DO K = 2, KM
        DO I = 1, IM
          if (k .le. kmax(i)) then
            IF(DBYO(I,k).LT.0..AND.FLG(I).AND.K.GT.KBCON(I)) THEN
              KTCON(I) = K
              FLG(I) = .FALSE.
            ENDIF
          endif
        ENDDO
      ENDDO
      DO I = 1, IM
        IF(CNVFLG(I).AND.(PFLD(I,KBCON(I)) - PFLD(I,KTCON(I))).LT.150.) &
     &  CNVFLG(I) = .FALSE.
      ENDDO
      TOTFLG = .TRUE.
      DO I = 1, IM
        TOTFLG = TOTFLG .AND. (.NOT. CNVFLG(I))
      ENDDO
      IF(TOTFLG) RETURN
!
!  SEARCH FOR DOWNDRAFT ORIGINATING LEVEL ABOVE THETA-E MINIMUM
!
      DO I = 1, IM
        HMIN(I) = HEO(I,KBCON(I))
        LMIN(I) = KBMAX(I)
        JMIN(I) = KBMAX(I)
      ENDDO
      DO I = 1, IM
        DO K = KBCON(I), KBMAX(I)
          IF(HEO(I,k).LT.HMIN(I).AND.CNVFLG(I)) THEN
            LMIN(I) = K + 1
            HMIN(I) = HEO(I,k)
          ENDIF
        ENDDO
      ENDDO
!
!  Make sure that JMIN(I) is within the cloud
!
      DO I = 1, IM
        IF(CNVFLG(I)) THEN
          JMIN(I) = MIN(LMIN(I),KTCON(I)-1)
          XMBMAX(I) = .1
          JMIN(I) = MAX(JMIN(I),KBCON(I)+1)
        ENDIF
      ENDDO
!
!  ENTRAINING CLOUD
!
      do k = 2, km1
        DO I = 1, IM
          if (k .le. kmax(i)-1) then
            if(CNVFLG(I).and.k.gt.JMIN(I).and.k.le.KTCON(I)) THEN
              SUMZ(I,k) = SUMZ(I,k-1) + .5 * (ZO(I,k+1) - ZO(I,k-1))
              SUMH(I,k) = SUMH(I,k-1) + .5 * (ZO(I,k+1) - ZO(I,k-1))    &
     &                  * HEO(I,k)
            ENDIF
          endif
        enddo
      enddo
!!
      DO I = 1, IM
        IF(CNVFLG(I)) THEN
!         call random_number(XKT2)
!         call srand(fhour)
!         XKT2(I) = rand()
          KT2(I) = nint(XKT2(I)*float(KTCON(I)-JMIN(I))-.5)+JMIN(I)+1
!         KT2(I) = nint(sqrt(XKT2(I))*float(KTCON(I)-JMIN(I))-.5) + JMIN(I) + 1
!         KT2(I) = nint(ranf() *float(KTCON(I)-JMIN(I))-.5) + JMIN(I) + 1
          tem1 = (HCKO(I,JMIN(I)) - HESO(I,KT2(I)))
          tem2 = (SUMZ(I,KT2(I)) * HESO(I,KT2(I)) - SUMH(I,KT2(I)))
          if (abs(tem2) .gt. 0.000001) THEN
            XLAMB(I) = tem1 / tem2
          else
            CNVFLG(I) = .false.
          ENDIF
!         XLAMB(I) = (HCKO(I,JMIN(I)) - HESO(I,KT2(I)))
!    &          / (SUMZ(I,KT2(I)) * HESO(I,KT2(I)) - SUMH(I,KT2(I)))
          XLAMB(I) = max(XLAMB(I),RZERO)
          XLAMB(I) = min(XLAMB(I),2.3/SUMZ(I,KT2(I)))
        ENDIF
      ENDDO
!!
      DO I = 1, IM
       DWNFLG(I)  = CNVFLG(I)
       DWNFLG2(I) = CNVFLG(I)
       IF(CNVFLG(I)) THEN
        if(KT2(I).ge.KTCON(I)) DWNFLG(I) = .false.
      if(XLAMB(I).le.1.e-30.or.HCKO(I,JMIN(I))-HESO(I,KT2(I)).le.1.e-30)&
     &  DWNFLG(I) = .false.
        do k = JMIN(I), KT2(I)
          if(DWNFLG(I).and.HEO(I,k).gt.HESO(I,KT2(I))) DWNFLG(I)=.false.
        enddo
!       IF(CNVFLG(I).AND.(PFLD(KBCON(I))-PFLD(KTCON(I))).GT.PDETRN)
!    &     DWNFLG(I)=.FALSE.
        IF(CNVFLG(I).AND.(PFLD(I,KBCON(I))-PFLD(I,KTCON(I))).LT.PDPDWN) &
     &     DWNFLG2(I)=.FALSE.
       ENDIF
      ENDDO
!!
      DO K = 2, KM1
        DO I = 1, IM
          if (k .le. kmax(i)-1) then
            IF(DWNFLG(I).AND.K.GT.JMIN(I).AND.K.LE.KT2(I)) THEN
              DZ        = .5 * (ZO(I,k+1) - ZO(I,k-1))
!             ETA(I,k)  = ETA(I,k-1) * EXP( XLAMB(I) * DZ)
!  to simplify matter, we will take the linear approach here
!
              ETA(I,k)  = ETA(I,k-1) * (1. + XLAMB(I) * dz)
              ETAU(I,k) = ETAU(I,k-1) * (1. + (XLAMB(I)+xlambu) * dz)
            ENDIF
          endif
        ENDDO
      ENDDO
!!
      DO K = 2, KM1
        DO I = 1, IM
          if (k .le. kmax(i)-1) then
!           IF(.NOT.DWNFLG(I).AND.K.GT.JMIN(I).AND.K.LE.KT2(I)) THEN
            IF(.NOT.DWNFLG(I).AND.K.GT.JMIN(I).AND.K.LE.KTCON(I)) THEN
              DZ        = .5 * (ZO(I,k+1) - ZO(I,k-1))
              ETAU(I,k) = ETAU(I,k-1) * (1. + xlambu * dz)
            ENDIF
          endif
        ENDDO
      ENDDO
!      IF(LAT.EQ.LATD.AND.lon.eq.lond.and.CNVFLG(I)) THEN
!        PRINT *, ' LMIN(I), KT2(I)=', LMIN(I), KT2(I)
!        PRINT *, ' KBOT, KTOP, JMIN(I) =', KBCON(I), KTCON(I), JMIN(I)
!      ENDIF
!     IF(LAT.EQ.LATD.AND.lon.eq.lond) THEN
!       print *, ' xlamb =', xlamb
!       print *, ' eta =', (eta(k),k=1,KT2(I))
!       print *, ' ETAU =', (ETAU(I,k),k=1,KT2(I))
!       print *, ' HCKO =', (HCKO(I,k),k=1,KT2(I))
!       print *, ' SUMZ =', (SUMZ(I,k),k=1,KT2(I))
!       print *, ' SUMH =', (SUMH(I,k),k=1,KT2(I))
!     ENDIF
      DO I = 1, IM
        if(DWNFLG(I)) THEN
          KTCON(I) = KT2(I)
        ENDIF
      ENDDO
!
!  CLOUD PROPERTY ABOVE CLOUD Base IS MODIFIED BY THE DETRAINMENT PROCESS
!
      DO K = 2, KM1
        DO I = 1, IM
          if (k .le. kmax(i)-1) then
!jfe
            IF(CNVFLG(I).AND.K.GT.KBCON(I).AND.K.LE.KTCON(I)) THEN
!jfe      IF(K.GT.KBCON(I).AND.K.LE.KTCON(I)) THEN
              FACTOR    = ETA(I,k-1) / ETA(I,k)
              ONEMF     = 1. - FACTOR
              fuv       = ETAU(I,k-1) / ETAU(I,k)
              onemfu    = 1. - fuv
              HCKO(I,k) = FACTOR * HCKO(I,k-1) + ONEMF *                &
     &                    .5 * (HEO(I,k) + HEO(I,k+1))
              UCKO(I,k) = fuv * UCKO(I,k-1) + ONEMFu *                  &
     &                    .5 * (UO(I,k) + UO(I,k+1))
              VCKO(I,k) = fuv * VCKO(I,k-1) + ONEMFu *                  &
     &                    .5 * (VO(I,k) + VO(I,k+1))
              DBYO(I,k) = HCKO(I,k) - HESO(I,k)
            ENDIF
          endif
        ENDDO
      ENDDO
!      IF(LAT.EQ.LATD.AND.lon.eq.lond.and.CNVFLG(I)) THEN
!        PRINT *, ' UCKO=', (UCKO(I,k),k=KBCON(I)+1,KTCON(I))
!        PRINT *, ' uenv=', (.5*(UO(I,k)+UO(I,k-1)),k=KBCON(I)+1,KTCON(I))
!      ENDIF
      DO I = 1, IM
        if(CNVFLG(I).and.DWNFLG2(I).and.JMIN(I).le.KBCON(I))            &
     &     THEN
          CNVFLG(I) = .false.
          DWNFLG(I) = .false.
          DWNFLG2(I) = .false.
        ENDIF
      ENDDO
!!
      TOTFLG = .TRUE.
      DO I = 1, IM
        TOTFLG = TOTFLG .AND. (.NOT. CNVFLG(I))
      ENDDO
      IF(TOTFLG) RETURN
!!
!
!  COMPUTE CLOUD MOISTURE PROPERTY AND PRECIPITATION
!
      DO I = 1, IM
          AA1(I) = 0.
          RHBAR(I) = 0.
      ENDDO
      DO K = 1, KM
        DO I = 1, IM
          if (k .le. kmax(i)) then
            IF(CNVFLG(I).AND.K.GT.KB(I).AND.K.LT.KTCON(I)) THEN
              DZ = .5 * (ZO(I,k+1) - ZO(I,k-1))
              DZ1 = (ZO(I,k) - ZO(I,k-1))
              GAMMA = EL2ORC * QESO(I,k) / (TO(I,k)**2)
              QRCH = QESO(I,k)                                          &
     &             + GAMMA * DBYO(I,k) / (HVAP * (1. + GAMMA))
              FACTOR = ETA(I,k-1) / ETA(I,k)
              ONEMF = 1. - FACTOR
              QCKO(I,k) = FACTOR * QCKO(I,k-1) + ONEMF *                &
     &                    .5 * (QO(I,k) + QO(I,k+1))
              DQ = ETA(I,k) * QCKO(I,k) - ETA(I,k) * QRCH
              RHBAR(I) = RHBAR(I) + QO(I,k) / QESO(I,k)
!
!  BELOW LFC CHECK IF THERE IS EXCESS MOISTURE TO RELEASE LATENT HEAT
!
              IF(DQ.GT.0.) THEN
                ETAH = .5 * (ETA(I,k) + ETA(I,k-1))
                QLK = DQ / (ETA(I,k) + ETAH * C0 * DZ)
                AA1(I) = AA1(I) - DZ1 * G * QLK
                QC = QLK + QRCH
                PWO(I,k) = ETAH * C0 * DZ * QLK
                QCKO(I,k) = QC
                PWAVO(I) = PWAVO(I) + PWO(I,k)
              ENDIF
            ENDIF
          endif
        ENDDO
      ENDDO
      DO I = 1, IM
        RHBAR(I) = RHBAR(I) / float(KTCON(I) - KB(I) - 1)
      ENDDO
!
!  this section is ready for cloud water
!
      if(ncloud.gt.0) THEN
!
!  compute liquid and vapor separation at cloud top
!
      DO I = 1, IM
        k = KTCON(I)
        IF(CNVFLG(I)) THEN
          GAMMA = EL2ORC * QESO(I,K) / (TO(I,K)**2)
          QRCH = QESO(I,K)                                              &
     &         + GAMMA * DBYO(I,K) / (HVAP * (1. + GAMMA))
          DQ = QCKO(I,K-1) - QRCH
!
!  CHECK IF THERE IS EXCESS MOISTURE TO RELEASE LATENT HEAT
!
          IF(DQ.GT.0.) THEN
            QLKO_KTCON(I) = dq
            QCKO(I,K-1) = QRCH
          ENDIF
        ENDIF
      ENDDO
      ENDIF
!
!  CALCULATE CLOUD WORK FUNCTION AT T+DT
!
      DO K = 1, KM
        DO I = 1, IM
          if (k .le. kmax(i)) then
            IF(CNVFLG(I).AND.K.GT.KBCON(I).AND.K.LE.KTCON(I)) THEN
              DZ1 = ZO(I,k) - ZO(I,k-1)
              GAMMA = EL2ORC * QESO(I,k-1) / (TO(I,k-1)**2)
              RFACT =  1. + DELTA * CP * GAMMA                          &
     &                 * TO(I,k-1) / HVAP
              AA1(I) = AA1(I) +                                         &
     &                 DZ1 * (G / (CP * TO(I,k-1)))                     &
     &                 * DBYO(I,k-1) / (1. + GAMMA)                     &
     &                 * RFACT
              val = 0.
              AA1(I)=AA1(I)+                                            &
     &                 DZ1 * G * DELTA *                                &
!cmr &                 MAX( 0.,(QESO(I,k-1) - QO(I,k-1)))               & 
     &                 MAX(val,(QESO(I,k-1) - QO(I,k-1)))
            ENDIF
          endif
        ENDDO
      ENDDO
      DO I = 1, IM
        IF(CNVFLG(I).AND.AA1(I).LE.0.) DWNFLG(I)  = .FALSE.
        IF(CNVFLG(I).AND.AA1(I).LE.0.) DWNFLG2(I) = .FALSE.
        IF(CNVFLG(I).AND.AA1(I).LE.0.) CNVFLG(I)  = .FALSE.
      ENDDO
!!
      TOTFLG = .TRUE.
      DO I = 1, IM
        TOTFLG = TOTFLG .AND. (.NOT. CNVFLG(I))
      ENDDO
      IF(TOTFLG) RETURN
!!
!cccc IF(LAT.EQ.LATD.AND.lon.eq.lond.and.CNVFLG(I)) THEN
!cccc   PRINT *, ' AA1(I) BEFORE DWNDRFT =', AA1(I)
!cccc ENDIF
!
!------- DOWNDRAFT CALCULATIONS
!
!
!--- DETERMINE DOWNDRAFT STRENGTH IN TERMS OF WINDSHEAR
!
      DO I = 1, IM
        IF(CNVFLG(I)) THEN
          VSHEAR(I) = 0.
        ENDIF
      ENDDO
      DO K = 1, KM
        DO I = 1, IM
          if (k .le. kmax(i)) then
            IF(K.GE.KB(I).AND.K.LE.KTCON(I).AND.CNVFLG(I)) THEN
              shear=rcs(I) * sqrt((UO(I,k+1)-UO(I,k)) ** 2              &
     &                          + (VO(I,k+1)-VO(I,k)) ** 2)
              VSHEAR(I) = VSHEAR(I) + SHEAR
            ENDIF
          endif
        ENDDO
      ENDDO
      DO I = 1, IM
        EDT(I) = 0.
        IF(CNVFLG(I)) THEN
          KNUMB = KTCON(I) - KB(I) + 1
          KNUMB = MAX(KNUMB,1)
          VSHEAR(I) = 1.E3 * VSHEAR(I) / (ZO(I,KTCON(I))-ZO(I,KB(I)))
          E1=1.591-.639*VSHEAR(I)                                       &
     &       +.0953*(VSHEAR(I)**2)-.00496*(VSHEAR(I)**3)
          EDT(I)=1.-E1
!cmr      EDT(I) = MIN(EDT(I),.9)
          val =         .9
          EDT(I) = MIN(EDT(I),val)
!cmr      EDT(I) = MAX(EDT(I),.0)
          val =         .0
          EDT(I) = MAX(EDT(I),val)
          EDTO(I)=EDT(I)
          EDTX(I)=EDT(I)
        ENDIF
      ENDDO
!  DETERMINE DETRAINMENT RATE BETWEEN 1 AND KBDTR
      DO I = 1, IM
        KBDTR(I) = KBCON(I)
        beta = betas
        if(SLIMSK(I).eq.1.) beta = betal
        IF(CNVFLG(I)) THEN
          KBDTR(I) = KBCON(I)
          KBDTR(I) = MAX(KBDTR(I),1)
          XLAMD(I) = 0.
          IF(KBDTR(I).GT.1) THEN
            DZ = .5 * ZO(I,KBDTR(I)) + .5 * ZO(I,KBDTR(I)-1)            &
     &         - ZO(I,1)
            XLAMD(I) =  LOG(BETA) / DZ
          ENDIF
        ENDIF
      ENDDO
!  DETERMINE DOWNDRAFT MASS FLUX
      DO K = 1, KM
        DO I = 1, IM
          IF(k .le. kmax(i)) then
            IF(CNVFLG(I)) THEN
              ETAD(I,k) = 1.
            ENDIF
            QRCDO(I,k) = 0.
          endif
        ENDDO
      ENDDO
      DO K = KM1, 2, -1
        DO I = 1, IM
          if (k .le. kbmax(i)) then
            IF(CNVFLG(I).AND.K.LT.KBDTR(I)) THEN
              DZ        = .5 * (ZO(I,k+1) - ZO(I,k-1))
              ETAD(I,k) = ETAD(I,k+1) * EXP(XLAMD(I) * DZ)
            ENDIF
          endif
        ENDDO
      ENDDO
      K = 1
      DO I = 1, IM
        IF(CNVFLG(I).AND.KBDTR(I).GT.1) THEN
          DZ = .5 * (ZO(I,2) - ZO(I,1))
          ETAD(I,k) = ETAD(I,k+1) * EXP(XLAMD(I) * DZ)
        ENDIF
      ENDDO
!
!--- DOWNDRAFT MOISTURE PROPERTIES
!
      DO I = 1, IM
        PWEVO(I) = 0.
        FLG(I) = CNVFLG(I)
      ENDDO
      DO I = 1, IM
        IF(CNVFLG(I)) THEN
          JMN = JMIN(I)
          HCDO(I) = HEO(I,JMN)
          QCDO(I) = QO(I,JMN)
          QRCDO(I,JMN) = QESO(I,JMN)
          UCDO(I) = UO(I,JMN)
          VCDO(I) = VO(I,JMN)
        ENDIF
      ENDDO
      DO K = KM1, 1, -1
        DO I = 1, IM
          if (k .le. kmax(i)-1) then
            IF(CNVFLG(I).AND.K.LT.JMIN(I)) THEN
              DQ = QESO(I,k)
              DT = TO(I,k)
              GAMMA      = EL2ORC * DQ / DT**2
              DH         = HCDO(I) - HESO(I,k)
              QRCDO(I,k) = DQ+(1./HVAP)*(GAMMA/(1.+GAMMA))*DH
              DETAD      = ETAD(I,k+1) - ETAD(I,k)
              PWDO(I,k)  = ETAD(I,k+1) * QCDO(I) -                      &
     &                     ETAD(I,k) * QRCDO(I,k)
              PWDO(I,k)  = PWDO(I,k) - DETAD *                          &
     &                    .5 * (QRCDO(I,k) + QRCDO(I,k+1))
              QCDO(I)    = QRCDO(I,k)
              PWEVO(I)   = PWEVO(I) + PWDO(I,k)
            ENDIF
          endif
        ENDDO
      ENDDO
!     IF(LAT.EQ.LATD.AND.lon.eq.lond.and.DWNFLG(I)) THEN
!       PRINT *, ' PWAVO(I), PWEVO(I) =', PWAVO(I), PWEVO(I)
!     ENDIF
!
!--- FINAL DOWNDRAFT STRENGTH DEPENDENT ON PRECIP
!--- EFFICIENCY (EDT), NORMALIZED CONDENSATE (PWAV), AND
!--- EVAPORATE (PWEV)
!
      DO I = 1, IM
        edtmax = edtmaxl
        if(SLIMSK(I).eq.0.) edtmax = edtmaxs
        IF(DWNFLG2(I)) THEN
          IF(PWEVO(I).LT.0.) THEN
            EDTO(I) = -EDTO(I) * PWAVO(I) / PWEVO(I)
            EDTO(I) = MIN(EDTO(I),EDTMAX)
          ELSE
            EDTO(I) = 0.
          ENDIF
        ELSE
          EDTO(I) = 0.
        ENDIF
      ENDDO
!
!
!--- DOWNDRAFT CLOUDWORK FUNCTIONS
!
!
      DO K = KM1, 1, -1
        DO I = 1, IM
          if (k .le. kmax(i)-1) then
            IF(DWNFLG2(I).AND.K.LT.JMIN(I)) THEN
              GAMMA = EL2ORC * QESO(I,k+1) / TO(I,k+1)**2
              DHH=HCDO(I)
              DT=TO(I,k+1)
              DG=GAMMA
              DH=HESO(I,k+1)
              DZ=-1.*(ZO(I,k+1)-ZO(I,k))
              AA1(I)=AA1(I)+EDTO(I)*DZ*(G/(CP*DT))*((DHH-DH)/(1.+DG))   &
     &               *(1.+DELTA*CP*DG*DT/HVAP)
              val=0.
              AA1(I)=AA1(I)+EDTO(I)*                                    & 
!cmr &        DZ*G*DELTA*MAX( 0.,(QESO(I,k+1)-QO(I,k+1)))               &
     &        DZ*G*DELTA*MAX(val,(QESO(I,k+1)-QO(I,k+1)))
            ENDIF
          endif
        ENDDO
      ENDDO
!cccc IF(LAT.EQ.LATD.AND.lon.eq.lond.and.DWNFLG2(I)) THEN
!cccc   PRINT *, '  AA1(I) AFTER DWNDRFT =', AA1(I)
!cccc ENDIF
      DO I = 1, IM
        IF(AA1(I).LE.0.) CNVFLG(I)  = .FALSE.
        IF(AA1(I).LE.0.) DWNFLG(I)  = .FALSE.
        IF(AA1(I).LE.0.) DWNFLG2(I) = .FALSE.
      ENDDO
!!
      TOTFLG = .TRUE.
      DO I = 1, IM
        TOTFLG = TOTFLG .AND. (.NOT. CNVFLG(I))
      ENDDO
      IF(TOTFLG) RETURN
!!
!
!
!--- WHAT WOULD THE CHANGE BE, THAT A CLOUD WITH UNIT MASS
!--- WILL DO TO THE ENVIRONMENT?
!
      DO K = 1, KM
        DO I = 1, IM
          IF(k .le. kmax(i) .and. CNVFLG(I)) THEN
            DELLAH(I,k) = 0.
            DELLAQ(I,k) = 0.
            DELLAU(I,k) = 0.
            DELLAV(I,k) = 0.
          ENDIF
        ENDDO
      ENDDO
      DO I = 1, IM
        IF(CNVFLG(I)) THEN
          DP = 1000. * DEL(I,1)
          DELLAH(I,1) = EDTO(I) * ETAD(I,1) * (HCDO(I)                  &
     &                - HEO(I,1)) * G / DP
          DELLAQ(I,1) = EDTO(I) * ETAD(I,1) * (QCDO(I)                  &
     &                - QO(I,1)) * G / DP
          DELLAU(I,1) = EDTO(I) * ETAD(I,1) * (UCDO(I)                  &
     &                - UO(I,1)) * G / DP
          DELLAV(I,1) = EDTO(I) * ETAD(I,1) * (VCDO(I)                  &
     &                - VO(I,1)) * G / DP
        ENDIF
      ENDDO
!
!--- CHANGED DUE TO SUBSIDENCE AND ENTRAINMENT
!
      DO K = 2, KM1
        DO I = 1, IM
          if (k .le. kmax(i)-1) then
            IF(CNVFLG(I).AND.K.LT.KTCON(I)) THEN
              AUP = 1.
              IF(K.LE.KB(I)) AUP = 0.
              ADW = 1.
              IF(K.GT.JMIN(I)) ADW = 0.
              DV1= HEO(I,k)
              DV2 = .5 * (HEO(I,k) + HEO(I,k+1))
              DV3= HEO(I,k-1)
              DV1Q= QO(I,k)
              DV2Q = .5 * (QO(I,k) + QO(I,k+1))
              DV3Q= QO(I,k-1)
              DV1U= UO(I,k)
              DV2U = .5 * (UO(I,k) + UO(I,k+1))
              DV3U= UO(I,k-1)
              DV1V= VO(I,k)
              DV2V = .5 * (VO(I,k) + VO(I,k+1))
              DV3V= VO(I,k-1)
              DP = 1000. * DEL(I,K)
              DZ = .5 * (ZO(I,k+1) - ZO(I,k-1))
              DETA = ETA(I,k) - ETA(I,k-1)
              DETAD = ETAD(I,k) - ETAD(I,k-1)
              DELLAH(I,k) = DELLAH(I,k) +                               &
     &            ((AUP * ETA(I,k) - ADW * EDTO(I) * ETAD(I,k)) * DV1   &
     &        - (AUP * ETA(I,k-1) - ADW * EDTO(I) * ETAD(I,k-1))* DV3   &
     &                    - AUP * DETA * DV2                            &
     &                    + ADW * EDTO(I) * DETAD * HCDO(I)) * G / DP
              DELLAQ(I,k) = DELLAQ(I,k) +                               &
     &            ((AUP * ETA(I,k) - ADW * EDTO(I) * ETAD(I,k)) * DV1Q  &
     &        - (AUP * ETA(I,k-1) - ADW * EDTO(I) * ETAD(I,k-1))* DV3Q  &
     &                    - AUP * DETA * DV2Q                           &
     &       +ADW*EDTO(I)*DETAD*.5*(QRCDO(I,k)+QRCDO(I,k-1))) * G / DP
              DELLAU(I,k) = DELLAU(I,k) +                               &
     &            ((AUP * ETA(I,k) - ADW * EDTO(I) * ETAD(I,k)) * DV1U  &
     &        - (AUP * ETA(I,k-1) - ADW * EDTO(I) * ETAD(I,k-1))* DV3U  &
     &                     - AUP * DETA * DV2U                          &
     &                    + ADW * EDTO(I) * DETAD * UCDO(I)             & 
     &                    ) * G / DP
              DELLAV(I,k) = DELLAV(I,k) +                               &
     &            ((AUP * ETA(I,k) - ADW * EDTO(I) * ETAD(I,k)) * DV1V  &
     &        - (AUP * ETA(I,k-1) - ADW * EDTO(I) * ETAD(I,k-1))* DV3V  &
     &                     - AUP * DETA * DV2V                          &
     &                    + ADW * EDTO(I) * DETAD * VCDO(I)             &
     &                    ) * G / DP
            ENDIF
          endif
        ENDDO
      ENDDO
!
!------- CLOUD TOP
!
      DO I = 1, IM
        IF(CNVFLG(I)) THEN
          INDX = KTCON(I)
          DP = 1000. * DEL(I,INDX)
          DV1 = HEO(I,INDX-1)
          DELLAH(I,INDX) = ETA(I,INDX-1) *                              &
     &                     (HCKO(I,INDX-1) - DV1) * G / DP
          DVQ1 = QO(I,INDX-1) 
          DELLAQ(I,INDX) = ETA(I,INDX-1) *                              &
     &                     (QCKO(I,INDX-1) - DVQ1) * G / DP
          DV1U = UO(I,INDX-1)
          DELLAU(I,INDX) = ETA(I,INDX-1) *                              &
     &                     (UCKO(I,INDX-1) - DV1U) * G / DP
          DV1V = VO(I,INDX-1)
          DELLAV(I,INDX) = ETA(I,INDX-1) *                              &
     &                     (VCKO(I,INDX-1) - DV1V) * G / DP
!
!  cloud water
!
          DELLAL(I) = ETA(I,INDX-1) * QLKO_KTCON(I) * g / dp
        ENDIF
      ENDDO
!
!------- FINAL CHANGED VARIABLE PER UNIT MASS FLUX
!
      DO K = 1, KM
        DO I = 1, IM
          if (k .le. kmax(i)) then
            IF(CNVFLG(I).and.k.gt.KTCON(I)) THEN
              QO(I,k) = Q1(I,k)
              TO(I,k) = T1(I,k)
              UO(I,k) = U1(I,k)
              VO(I,k) = V1(I,k)
            ENDIF
            IF(CNVFLG(I).AND.K.LE.KTCON(I)) THEN
              QO(I,k) = DELLAQ(I,k) * MBDT + Q1(I,k)
              DELLAT = (DELLAH(I,k) - HVAP * DELLAQ(I,k)) / CP
              TO(I,k) = DELLAT * MBDT + T1(I,k)
!cmr          QO(I,k) = max(QO(I,k),1.e-10)
              val   =           1.e-10
              QO(I,k) = max(QO(I,k), val  )
            ENDIF
          endif
        ENDDO
      ENDDO
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!
!--- THE ABOVE CHANGED ENVIRONMENT IS NOW USED TO CALULATE THE
!--- EFFECT THE ARBITRARY CLOUD (WITH UNIT MASS FLUX)
!--- WOULD HAVE ON THE STABILITY,
!--- WHICH THEN IS USED TO CALCULATE THE REAL MASS FLUX,
!--- NECESSARY TO KEEP THIS CHANGE IN BALANCE WITH THE LARGE-SCALE
!--- DESTABILIZATION.
!
!--- ENVIRONMENTAL CONDITIONS AGAIN, FIRST HEIGHTS
!
      DO K = 1, KM
        DO I = 1, IM
          IF(k .le. kmax(i) .and. CNVFLG(I)) THEN
!jfe        QESO(I,k) = 10. * FPVS(TO(I,k))
!
            QESO(I,k) = 0.01 * fpvs(TO(I,K))      ! fpvs is in Pa
!
            QESO(I,k) = EPS * QESO(I,k) / (PFLD(I,k)+EPSM1*QESO(I,k))
!cmr        QESO(I,k) = MAX(QESO(I,k),1.E-8)
            val       =             1.E-8
            QESO(I,k) = MAX(QESO(I,k), val )
            TVO(I,k)  = TO(I,k) + DELTA * TO(I,k) * QO(I,k)
          ENDIF
        ENDDO
      ENDDO
      DO I = 1, IM
        IF(CNVFLG(I)) THEN
          XAA0(I) = 0.
          XPWAV(I) = 0.
        ENDIF
      ENDDO
!
!  HYDROSTATIC HEIGHT ASSUME ZERO TERR
!
!     DO I = 1, IM
!       IF(CNVFLG(I)) THEN
!         DLNSIG =  LOG(PRSL(I,1)/PS(I))
!         ZO(I,1) = TERR - DLNSIG * RD / G * TVO(I,1)
!       ENDIF
!     ENDDO
!     DO K = 2, KM
!       DO I = 1, IM
!         IF(k .le. kmax(i) .and. CNVFLG(I)) THEN
!           DLNSIG =  LOG(PRSL(I,K) / PRSL(I,K-1))
!           ZO(I,k) = ZO(I,k-1) - DLNSIG * RD / G
!    &             * .5 * (TVO(I,k) + TVO(I,k-1))
!         ENDIF
!       ENDDO
!     ENDDO
!
!--- MOIST STATIC ENERGY
!
      DO K = 1, KM1
        DO I = 1, IM
          IF(k .le. kmax(i)-1 .and. CNVFLG(I)) THEN
            DZ = .5 * (ZO(I,k+1) - ZO(I,k))
            DP = .5 * (PFLD(I,k+1) - PFLD(I,k))
!jfe        ES = 10. * FPVS(TO(I,k+1))
!
            ES = 0.01 * fpvs(TO(I,K+1))      ! fpvs is in Pa
!
            PPRIME = PFLD(I,k+1) + EPSM1 * ES
            QS = EPS * ES / PPRIME
            DQSDP = - QS / PPRIME
            DESDT = ES * (FACT1 / TO(I,k+1) + FACT2 / (TO(I,k+1)**2))
            DQSDT = QS * PFLD(I,k+1) * DESDT / (ES * PPRIME)
            GAMMA = EL2ORC * QESO(I,k+1) / (TO(I,k+1)**2)
            DT = (G * DZ + HVAP * DQSDP * DP) / (CP * (1. + GAMMA))
            DQ = DQSDT * DT + DQSDP * DP
            TO(I,k) = TO(I,k+1) + DT
            QO(I,k) = QO(I,k+1) + DQ
            PO(I,k) = .5 * (PFLD(I,k) + PFLD(I,k+1))
          ENDIF
        ENDDO
      ENDDO
      DO K = 1, KM1
        DO I = 1, IM
          IF(k .le. kmax(i)-1 .and. CNVFLG(I)) THEN
!jfe        QESO(I,k) = 10. * FPVS(TO(I,k))
!
            QESO(I,k) = 0.01 * fpvs(TO(I,K))      ! fpvs is in Pa
!
            QESO(I,k) = EPS * QESO(I,k) / (PO(I,k) + EPSM1 * QESO(I,k))
!cmr        QESO(I,k) = MAX(QESO(I,k),1.E-8)
            val1      =             1.E-8
            QESO(I,k) = MAX(QESO(I,k), val1)
!cmr        QO(I,k)   = max(QO(I,k),1.e-10)
            val2      =           1.e-10
            QO(I,k)   = max(QO(I,k), val2 )
!           QO(I,k)   = MIN(QO(I,k),QESO(I,k))
            HEO(I,k)   = .5 * G * (ZO(I,k) + ZO(I,k+1)) +               &
     &                    CP * TO(I,k) + HVAP * QO(I,k)
            HESO(I,k) = .5 * G * (ZO(I,k) + ZO(I,k+1)) +                &
     &                  CP * TO(I,k) + HVAP * QESO(I,k)
          ENDIF
        ENDDO
      ENDDO
      DO I = 1, IM
        k = kmax(i)
        IF(CNVFLG(I)) THEN
          HEO(I,k) = G * ZO(I,k) + CP * TO(I,k) + HVAP * QO(I,k)
          HESO(I,k) = G * ZO(I,k) + CP * TO(I,k) + HVAP * QESO(I,k)
!         HEO(I,k) = MIN(HEO(I,k),HESO(I,k))
        ENDIF
      ENDDO
      DO I = 1, IM
        IF(CNVFLG(I)) THEN
          INDX = KB(I)
          XHKB(I) = HEO(I,INDX)
          XQKB(I) = QO(I,INDX)
          HCKO(I,INDX) = XHKB(I)
          QCKO(I,INDX) = XQKB(I)
        ENDIF
      ENDDO
!
!
!**************************** STATIC CONTROL
!
!
!------- MOISTURE AND CLOUD WORK FUNCTIONS
!
      DO K = 2, KM1
        DO I = 1, IM
          if (k .le. kmax(i)-1) then
!           IF(CNVFLG(I).AND.K.GT.KB(I).AND.K.LE.KBCON(I)) THEN
            IF(CNVFLG(I).AND.K.GT.KB(I).AND.K.LE.KTCON(I)) THEN
              FACTOR = ETA(I,k-1) / ETA(I,k)
              ONEMF = 1. - FACTOR
              HCKO(I,k) = FACTOR * HCKO(I,k-1) + ONEMF *                &
     &                    .5 * (HEO(I,k) + HEO(I,k+1))
            ENDIF
!           IF(CNVFLG(I).AND.K.GT.KBCON(I)) THEN
!             HEO(I,k) = HEO(I,k-1)
!           ENDIF
          endif
        ENDDO
      ENDDO
      DO K = 2, KM1
        DO I = 1, IM
          if (k .le. kmax(i)-1) then
            IF(CNVFLG(I).AND.K.GT.KB(I).AND.K.LT.KTCON(I)) THEN
              DZ = .5 * (ZO(I,k+1) - ZO(I,k-1))
              GAMMA = EL2ORC * QESO(I,k) / (TO(I,k)**2)
              XDBY = HCKO(I,k) - HESO(I,k)
!cmr          XDBY = MAX(XDBY,0.)
              val  =          0.
              XDBY = MAX(XDBY,val)
              XQRCH = QESO(I,k)                                         &
     &              + GAMMA * XDBY / (HVAP * (1. + GAMMA))
              FACTOR = ETA(I,k-1) / ETA(I,k)
              ONEMF = 1. - FACTOR
              QCKO(I,k) = FACTOR * QCKO(I,k-1) + ONEMF *                &
     &                    .5 * (QO(I,k) + QO(I,k+1))
              DQ = ETA(I,k) * QCKO(I,k) - ETA(I,k) * XQRCH
              IF(DQ.GT.0.) THEN
                ETAH = .5 * (ETA(I,k) + ETA(I,k-1))
                QLK = DQ / (ETA(I,k) + ETAH * C0 * DZ)
                XAA0(I) = XAA0(I) - (ZO(I,k) - ZO(I,k-1)) * G * QLK
                XQC = QLK + XQRCH
                XPW = ETAH * C0 * DZ * QLK
                QCKO(I,k) = XQC
                XPWAV(I) = XPWAV(I) + XPW
              ENDIF
            ENDIF
!           IF(CNVFLG(I).AND.K.GT.KBCON(I).AND.K.LT.KTCON(I)) THEN
            IF(CNVFLG(I).AND.K.GT.KBCON(I).AND.K.LE.KTCON(I)) THEN
              DZ1 = ZO(I,k) - ZO(I,k-1)
              GAMMA = EL2ORC * QESO(I,k-1) / (TO(I,k-1)**2)
              RFACT =  1. + DELTA * CP * GAMMA                          &
     &                 * TO(I,k-1) / HVAP
              XDBY = HCKO(I,k-1) - HESO(I,k-1)
              XAA0(I) = XAA0(I)                                         & 
     &                + DZ1 * (G / (CP * TO(I,k-1)))                    &
     &                * XDBY / (1. + GAMMA)                             &
     &                * RFACT
              val=0.
              XAA0(I)=XAA0(I)+                                          &
     &                 DZ1 * G * DELTA *                                &
!cmr &                 MAX( 0.,(QESO(I,k-1) - QO(I,k-1)))               & 
     &                 MAX(val,(QESO(I,k-1) - QO(I,k-1)))
            ENDIF
          endif
        ENDDO
      ENDDO
!cccc IF(LAT.EQ.LATD.AND.lon.eq.lond.and.CNVFLG(I)) THEN
!cccc   PRINT *, ' XAA BEFORE DWNDRFT =', XAA0(I)
!cccc ENDIF
!
!------- DOWNDRAFT CALCULATIONS
!
!
!--- DOWNDRAFT MOISTURE PROPERTIES
!
      DO I = 1, IM
        XPWEV(I) = 0.
      ENDDO
      DO I = 1, IM
        IF(DWNFLG2(I)) THEN
          JMN = JMIN(I)
          XHCD(I) = HEO(I,JMN)
          XQCD(I) = QO(I,JMN)
          QRCD(I,JMN) = QESO(I,JMN)
        ENDIF
      ENDDO
      DO K = KM1, 1, -1
        DO I = 1, IM
          if (k .le. kmax(i)-1) then
            IF(DWNFLG2(I).AND.K.LT.JMIN(I)) THEN
              DQ = QESO(I,k)
              DT = TO(I,k)
              GAMMA    = EL2ORC * DQ / DT**2
              DH       = XHCD(I) - HESO(I,k)
              QRCD(I,k)=DQ+(1./HVAP)*(GAMMA/(1.+GAMMA))*DH
              DETAD    = ETAD(I,k+1) - ETAD(I,k)
              XPWD     = ETAD(I,k+1) * QRCD(I,k+1) -                    &
     &                   ETAD(I,k) * QRCD(I,k)
              XPWD     = XPWD - DETAD *                                 & 
     &                 .5 * (QRCD(I,k) + QRCD(I,k+1))
              XPWEV(I) = XPWEV(I) + XPWD
            ENDIF
          endif
        ENDDO
      ENDDO
!
      DO I = 1, IM
        edtmax = edtmaxl
        if(SLIMSK(I).eq.0.) edtmax = edtmaxs
        IF(DWNFLG2(I)) THEN
          IF(XPWEV(I).GE.0.) THEN
            EDTX(I) = 0.
          ELSE
            EDTX(I) = -EDTX(I) * XPWAV(I) / XPWEV(I)
            EDTX(I) = MIN(EDTX(I),EDTMAX)
          ENDIF
        ELSE
          EDTX(I) = 0.
        ENDIF
      ENDDO
!
!
!
!--- DOWNDRAFT CLOUDWORK FUNCTIONS
!
!
      DO K = KM1, 1, -1
        DO I = 1, IM
          if (k .le. kmax(i)-1) then
            IF(DWNFLG2(I).AND.K.LT.JMIN(I)) THEN
              GAMMA = EL2ORC * QESO(I,k+1) / TO(I,k+1)**2
              DHH=XHCD(I)
              DT= TO(I,k+1)
              DG= GAMMA
              DH= HESO(I,k+1)
              DZ=-1.*(ZO(I,k+1)-ZO(I,k))
              XAA0(I)=XAA0(I)+EDTX(I)*DZ*(G/(CP*DT))*((DHH-DH)/(1.+DG)) &
     &                *(1.+DELTA*CP*DG*DT/HVAP)
              val=0.
              XAA0(I)=XAA0(I)+EDTX(I)*                                  &
!cmr &        DZ*G*DELTA*MAX( 0.,(QESO(I,k+1)-QO(I,k+1)))               &
     &        DZ*G*DELTA*MAX(val,(QESO(I,k+1)-QO(I,k+1)))
            ENDIF
          endif
        ENDDO
      ENDDO
!cccc IF(LAT.EQ.LATD.AND.lon.eq.lond.and.DWNFLG2(I)) THEN
!cccc   PRINT *, '  XAA AFTER DWNDRFT =', XAA0(I)
!cccc ENDIF
!
!  CALCULATE CRITICAL CLOUD WORK FUNCTION
!
      DO I = 1, IM
        ACRT(I) = 0.
        IF(CNVFLG(I)) THEN
!       IF(CNVFLG(I).AND.SLIMSK(I).NE.1.) THEN
          IF(PFLD(I,KTCON(I)).LT.PCRIT(15))THEN
            ACRT(I)=ACRIT(15)*(975.-PFLD(I,KTCON(I)))                   &    
     &              /(975.-PCRIT(15))
          ELSE IF(PFLD(I,KTCON(I)).GT.PCRIT(1))THEN
            ACRT(I)=ACRIT(1)
          ELSE
!cmr        K = IFIX((850. - PFLD(I,KTCON(I)))/50.) + 2
            K =  int((850. - PFLD(I,KTCON(I)))/50.) + 2
            K = MIN(K,15)
            K = MAX(K,2)
            ACRT(I)=ACRIT(K)+(ACRIT(K-1)-ACRIT(K))*                     &
     &           (PFLD(I,KTCON(I))-PCRIT(K))/(PCRIT(K-1)-PCRIT(K))
           ENDIF
!        ELSE
!          ACRT(I) = .5 * (PFLD(I,KBCON(I)) - PFLD(I,KTCON(I)))
         ENDIF
      ENDDO
      DO I = 1, IM
        ACRTFCT(I) = 1.
        IF(CNVFLG(I)) THEN
          if(SLIMSK(I).eq.1.) THEN
            w1 = w1l
            w2 = w2l
            w3 = w3l
            w4 = w4l
          else
            w1 = w1s
            w2 = w2s
            w3 = w3s
            w4 = w4s
          ENDIF
!C       IF(CNVFLG(I).AND.SLIMSK(I).EQ.1.) THEN
!         ACRTFCT(I) = PDOT(I) / W3
!
!  modify critical cloud workfunction by cloud base vertical velocity
!
          IF(PDOT(I).LE.W4) THEN
            ACRTFCT(I) = (PDOT(I) - W4) / (W3 - W4)
          ELSEIF(PDOT(I).GE.-W4) THEN
            ACRTFCT(I) = - (PDOT(I) + W4) / (W4 - W3)
          ELSE
            ACRTFCT(I) = 0.
          ENDIF
!cmr      ACRTFCT(I) = MAX(ACRTFCT(I),-1.)
          val1    =             -1.
          ACRTFCT(I) = MAX(ACRTFCT(I),val1)
!cmr      ACRTFCT(I) = MIN(ACRTFCT(I),1.)
          val2    =             1.
          ACRTFCT(I) = MIN(ACRTFCT(I),val2)
          ACRTFCT(I) = 1. - ACRTFCT(I)
!
!  modify ACRTFCT(I) by colume mean rh if RHBAR(I) is greater than 80 percent
!
!         if(RHBAR(I).ge..8) THEN
!           ACRTFCT(I) = ACRTFCT(I) * (.9 - min(RHBAR(I),.9)) * 10.
!         ENDIF
!
!  modify adjustment time scale by cloud base vertical velocity
!
          DTCONV(I) = DT2 + max((1800. - DT2),RZERO) *                  &
     &                (PDOT(I) - W2) / (W1 - W2)
!         DTCONV(I) = MAX(DTCONV(I), DT2)
!         DTCONV(I) = 1800. * (PDOT(I) - w2) / (w1 - w2)
          DTCONV(I) = max(DTCONV(I),dtmin)
          DTCONV(I) = min(DTCONV(I),dtmax)

        ENDIF
      ENDDO
!
!--- LARGE SCALE FORCING
!
      DO I= 1, IM
        FLG(I) = CNVFLG(I)
        IF(CNVFLG(I)) THEN
!         F = AA1(I) / DTCONV(I)
          FLD(I) = (AA1(I) - ACRT(I) * ACRTFCT(I)) / DTCONV(I)
          IF(FLD(I).LE.0.) FLG(I) = .FALSE.
        ENDIF
        CNVFLG(I) = FLG(I)
        IF(CNVFLG(I)) THEN
!         XAA0(I) = MAX(XAA0(I),0.)
          XK(I) = (XAA0(I) - AA1(I)) / MBDT
          IF(XK(I).GE.0.) FLG(I) = .FALSE.
        ENDIF
!
!--- KERNEL, CLOUD BASE MASS FLUX
!
        CNVFLG(I) = FLG(I)
        IF(CNVFLG(I)) THEN
          XMB(I) = -FLD(I) / XK(I)
          XMB(I) = MIN(XMB(I),XMBMAX(I))
        ENDIF
      ENDDO
!      IF(LAT.EQ.LATD.AND.lon.eq.lond.and.CNVFLG(I)) THEN
!        print *, ' RHBAR(I), ACRTFCT(I) =', RHBAR(I), ACRTFCT(I)
!        PRINT *, '  A1, XA =', AA1(I), XAA0(I)
!        PRINT *, ' XMB(I), ACRT =', XMB(I), ACRT
!      ENDIF
      TOTFLG = .TRUE.
      DO I = 1, IM
        TOTFLG = TOTFLG .AND. (.NOT. CNVFLG(I))
      ENDDO
      IF(TOTFLG) RETURN
!
!  restore t0 and QO to t1 and q1 in case convection stops
!
      do k = 1, km
        DO I = 1, IM
          if (k .le. kmax(i)) then
            TO(I,k) = T1(I,k)
            QO(I,k) = Q1(I,k)
!jfe        QESO(I,k) = 10. * FPVS(T1(I,k))
!
            QESO(I,k) = 0.01 * fpvs(T1(I,K))      ! fpvs is in Pa
!
            QESO(I,k) = EPS * QESO(I,k) / (PFLD(I,k) + EPSM1*QESO(I,k))
!cmr        QESO(I,k) = MAX(QESO(I,k),1.E-8)
            val     =             1.E-8
            QESO(I,k) = MAX(QESO(I,k), val )
          endif
        enddo
      enddo
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!
!--- FEEDBACK: SIMPLY THE CHANGES FROM THE CLOUD WITH UNIT MASS FLUX
!---           MULTIPLIED BY  THE MASS FLUX NECESSARY TO KEEP THE
!---           EQUILIBRIUM WITH THE LARGER-SCALE.
!
      DO I = 1, IM
        DELHBAR(I) = 0.
        DELQBAR(I) = 0.
        DELTBAR(I) = 0.
        QCOND(I) = 0.
      ENDDO
      DO K = 1, KM
        DO I = 1, IM
          if (k .le. kmax(i)) then
            IF(CNVFLG(I).AND.K.LE.KTCON(I)) THEN
              AUP = 1.
              IF(K.Le.KB(I)) AUP = 0.
              ADW = 1.
              IF(K.GT.JMIN(I)) ADW = 0.
              DELLAT = (DELLAH(I,k) - HVAP * DELLAQ(I,k)) / CP
              T1(I,k) = T1(I,k) + DELLAT * XMB(I) * DT2
              Q1(I,k) = Q1(I,k) + DELLAQ(I,k) * XMB(I) * DT2
              U1(I,k) = U1(I,k) + DELLAU(I,k) * XMB(I) * DT2
              V1(I,k) = V1(I,k) + DELLAV(I,k) * XMB(I) * DT2
              DP = 1000. * DEL(I,K)
              DELHBAR(I) = DELHBAR(I) + DELLAH(I,k)*XMB(I)*DP/G
              DELQBAR(I) = DELQBAR(I) + DELLAQ(I,k)*XMB(I)*DP/G
              DELTBAR(I) = DELTBAR(I) + DELLAT*XMB(I)*DP/G
            ENDIF
          endif
        ENDDO
      ENDDO
      DO K = 1, KM
        DO I = 1, IM
          if (k .le. kmax(i)) then
            IF(CNVFLG(I).AND.K.LE.KTCON(I)) THEN
!jfe          QESO(I,k) = 10. * FPVS(T1(I,k))
!
              QESO(I,k) = 0.01 * fpvs(T1(I,K))      ! fpvs is in Pa
!
              QESO(I,k) = EPS * QESO(I,k)/(PFLD(I,k) + EPSM1*QESO(I,k))
!cmr          QESO(I,k) = MAX(QESO(I,k),1.E-8)
              val     =             1.E-8
              QESO(I,k) = MAX(QESO(I,k), val )
!
!  cloud water
!
              if(ncloud.gt.0.and.CNVFLG(I).and.k.eq.KTCON(I)) THEN
                tem  = DELLAL(I) * XMB(I) * dt2
                tem1 = MAX(RZERO, MIN(RONE, (TCR-t1(I,K))*TCRF))
                if (QL(I,k,2) .gt. -999.0) then
                  QL(I,k,1) = QL(I,k,1) + tem * tem1            ! Ice
                  QL(I,k,2) = QL(I,k,2) + tem *(1.0-tem1)       ! Water
                else
                  tem2      = QL(I,k,1) + tem
                  QL(I,k,1) = tem2 * tem1                       ! Ice
                  QL(I,k,2) = tem2 - QL(I,k,1)                  ! Water
                endif
!               QL(I,k) = QL(I,k) + DELLAL(I) * XMB(I) * dt2
                dp = 1000. * del(i,k)
                DELLAL(I) = DELLAL(I) * XMB(I) * dp / g
              ENDIF
            ENDIF
          endif
        ENDDO
      ENDDO
!     IF(LAT.EQ.LATD.AND.lon.eq.lond.and.CNVFLG(I) ) THEN
!       PRINT *, ' DELHBAR, DELQBAR, DELTBAR ='
!       PRINT *, DELHBAR, HVAP*DELQBAR, CP*DELTBAR
!       PRINT *, '   DELLBAR ='
!       PRINT 6003,  HVAP*DELLbar
!       PRINT *, '   DELLAQ ='
!       PRINT 6003, (HVAP*DELLAQ(I,k)*XMB(I),K=1,KMAX)
!       PRINT *, '   DELLAT ='
!       PRINT 6003, (DELLAH(i,k)*XMB(I)-HVAP*DELLAQ(I,k)*XMB(I),         &
!    &               K=1,KMAX)
!     ENDIF
      DO I = 1, IM
        RNTOT(I) = 0.
        DELQEV(I) = 0.
        DELQ2(I) = 0.
        FLG(I) = CNVFLG(I)
      ENDDO
      DO K = KM, 1, -1
        DO I = 1, IM
          if (k .le. kmax(i)) then
            IF(CNVFLG(I).AND.K.LE.KTCON(I)) THEN
              AUP = 1.
              IF(K.Le.KB(I)) AUP = 0.
              ADW = 1.
              IF(K.GT.JMIN(I)) ADW = 0.
              rain =  AUP * PWO(I,k) + ADW * EDTO(I) * PWDO(I,k)
              RNTOT(I) = RNTOT(I) + rain * XMB(I) * .001 * dt2
            ENDIF
          endif
        ENDDO
      ENDDO
      DO K = KM, 1, -1
        DO I = 1, IM
          if (k .le. kmax(i)) then
            DELTV(I) = 0.
            DELQ(I) = 0.
            QEVAP(I) = 0.
            IF(CNVFLG(I).AND.K.LE.KTCON(I)) THEN
              AUP = 1.
              IF(K.Le.KB(I)) AUP = 0.
              ADW = 1.
              IF(K.GT.JMIN(I)) ADW = 0.
              rain =  AUP * PWO(I,k) + ADW * EDTO(I) * PWDO(I,k)
              RN(I) = RN(I) + rain * XMB(I) * .001 * dt2
            ENDIF
            IF(FLG(I).AND.K.LE.KTCON(I)) THEN
              evef = EDT(I) * evfact
              if(SLIMSK(I).eq.1.) evef=EDT(I) * evfactl
!             if(SLIMSK(I).eq.1.) evef=.07
!             if(SLIMSK(I).ne.1.) evef = 0.
              QCOND(I) = EVEF * (Q1(I,k) - QESO(I,k))                   &
     &                 / (1. + EL2ORC * QESO(I,k) / T1(I,k)**2)
              DP = 1000. * DEL(I,K)
              IF(RN(I).GT.0..AND.QCOND(I).LT.0.) THEN
                QEVAP(I) = -QCOND(I) * (1.-EXP(-.32*SQRT(DT2*RN(I))))
                QEVAP(I) = MIN(QEVAP(I), RN(I)*1000.*G/DP)
                DELQ2(I) = DELQEV(I) + .001 * QEVAP(I) * dp / g
              ENDIF
              if(RN(I).gt.0..and.QCOND(I).LT.0..and.                    &
     &           DELQ2(I).gt.RNTOT(I)) THEN
                QEVAP(I) = 1000.* g * (RNTOT(I) - DELQEV(I)) / dp
                FLG(I) = .false.
              ENDIF
              IF(RN(I).GT.0..AND.QEVAP(I).gt.0.) THEN
                Q1(I,k) = Q1(I,k) + QEVAP(I)
                T1(I,k) = T1(I,k) - ELOCP * QEVAP(I)
                RN(I) = RN(I) - .001 * QEVAP(I) * DP / G
                DELTV(I) = - ELOCP*QEVAP(I)/DT2
                DELQ(I) =  + QEVAP(I)/DT2
                DELQEV(I) = DELQEV(I) + .001*dp*QEVAP(I)/g
              ENDIF
              DELLAQ(I,k) = DELLAQ(I,k) + DELQ(I) / XMB(I)
              DELQBAR(I) = DELQBAR(I) + DELQ(I)*DP/G
              DELTBAR(I) = DELTBAR(I) + DELTV(I)*DP/G
            ENDIF
          endif
        ENDDO
      ENDDO
!      IF(LAT.EQ.LATD.AND.lon.eq.lond.and.CNVFLG(I) ) THEN
!        PRINT *, '   DELLAH ='
!        PRINT 6003, (DELLAH(k)*XMB(I),K=1,KMAX)
!        PRINT *, '   DELLAQ ='
!        PRINT 6003, (HVAP*DELLAQ(I,k)*XMB(I),K=1,KMAX)
!        PRINT *, ' DELHBAR, DELQBAR, DELTBAR ='
!        PRINT *, DELHBAR, HVAP*DELQBAR, CP*DELTBAR
!        PRINT *, ' PRECIP =', HVAP*RN(I)*1000./DT2
!CCCC   PRINT *, '   DELLBAR ='
!CCCC   PRINT *,  HVAP*DELLbar
!      ENDIF
!
!  PRECIPITATION RATE CONVERTED TO ACTUAL PRECIP
!  IN UNIT OF M INSTEAD OF KG
!
      DO I = 1, IM
        IF(CNVFLG(I)) THEN
!
!  IN THE EVENT OF UPPER LEVEL RAIN EVAPORATION AND LOWER LEVEL DOWNDRAF
!    MOISTENING, RN CAN BECOME NEGATIVE, IN THIS CASE, WE BACK OUT OF TH
!    HEATING AND THE MOISTENING
!
          if(RN(I).lt.0..and..not.FLG(I)) RN(I) = 0.
          IF(RN(I).LE.0.) THEN
            RN(I) = 0.
          ELSE
            KTOP(I) = KTCON(I)
            KBOT(I) = KBCON(I)
            KUO(I) = 1
            CLDWRK(I) = AA1(I)
          ENDIF
        ENDIF
      ENDDO
      DO K = 1, KM
        DO I = 1, IM
          if (k .le. kmax(i)) then
            IF(CNVFLG(I).AND.RN(I).LE.0.) THEN
              T1(I,k) = TO(I,k)
              Q1(I,k) = QO(I,k)
            ENDIF
          endif
        ENDDO
      ENDDO
!!
      RETURN
   END SUBROUTINE SASCNV

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

      SUBROUTINE SHALCV(IM,IX,KM,DT,DEL,PRSI,PRSL,PRSLK,KUO,Q,T,DPSHC)
!
      USE MODULE_GFS_MACHINE , ONLY : kind_phys
      USE MODULE_GFS_PHYSCONS, grav => con_g, CP => con_CP, HVAP => con_HVAP &
     &,             RD => con_RD

      implicit none
!
!     include 'constant.h'
!
      integer              IM, IX, KM, KUO(IM)
      real(kind=kind_phys) DEL(IX,KM),   PRSI(IX,KM+1), PRSL(IX,KM),    &
     &                     PRSLK(IX,KM),                                &
     &                     Q(IX,KM),     T(IX,KM),      DT, DPSHC
!
!     Locals
!
      real(kind=kind_phys) ck,    cpdt,   dmse,   dsdz1, dsdz2,         &
     &                     dsig,  dtodsl, dtodsu, eldq,  g,             &
     &                     gocp,  rtdls
!
      integer              k,k1,k2,kliftl,kliftu,kt,N2,I,iku,ik1,ik,ii
      integer              INDEX2(IM), KLCL(IM), KBOT(IM), KTOP(IM),kk  &
     &,                    KTOPM(IM)
!!
!  PHYSICAL PARAMETERS
      PARAMETER(G=GRAV, GOCP=G/CP)
!  BOUNDS OF PARCEL ORIGIN
      PARAMETER(KLIFTL=2,KLIFTU=2)
      LOGICAL   LSHC(IM)
      real(kind=kind_phys) Q2(IM*KM),     T2(IM*KM),                    &
     &                     PRSL2(IM*KM),  PRSLK2(IM*KM),                &
     &                     AL(IM*(KM-1)), AD(IM*KM), AU(IM*(KM-1))
!-----------------------------------------------------------------------
!  COMPRESS FIELDS TO POINTS WITH NO DEEP CONVECTION
!  AND MOIST STATIC INSTABILITY.
      DO I=1,IM
        LSHC(I)=.FALSE.
      ENDDO
      DO K=1,KM-1
        DO I=1,IM
          IF(KUO(I).EQ.0) THEN
            ELDQ    = HVAP*(Q(I,K)-Q(I,K+1))
            CPDT    = CP*(T(I,K)-T(I,K+1))
            RTDLS   = (PRSL(I,K)-PRSL(I,K+1)) /                         &
     &                 PRSI(I,K+1)*RD*0.5*(T(I,K)+T(I,K+1))
            DMSE    = ELDQ+CPDT-RTDLS
            LSHC(I) = LSHC(I).OR.DMSE.GT.0.
          ENDIF
        ENDDO
      ENDDO
      N2 = 0
      DO I=1,IM
        IF(LSHC(I)) THEN
          N2         = N2 + 1
          INDEX2(N2) = I
        ENDIF
      ENDDO
      IF(N2.EQ.0) RETURN
      DO K=1,KM
        KK = (K-1)*N2
        DO I=1,N2
          IK         = KK + I
          ii         = index2(i)
          Q2(IK)     = Q(II,K)
          T2(IK)     = T(II,K)
          PRSL2(IK)  = PRSL(II,K)
          PRSLK2(IK) = PRSLK(II,K)
        ENDDO
      ENDDO
      do i=1,N2
        ktopm(i) = KM
      enddo
      do k=2,KM
        do i=1,N2
          ii = index2(i)
          if (prsi(ii,1)-prsi(ii,k) .le. dpshc) ktopm(i) = k
        enddo
      enddo

!-----------------------------------------------------------------------
!  COMPUTE MOIST ADIABAT AND DETERMINE LIMITS OF SHALLOW CONVECTION.
!  CHECK FOR MOIST STATIC INSTABILITY AGAIN WITHIN CLOUD.
      CALL MSTADBT3(N2,KM-1,KLIFTL,KLIFTU,PRSL2,PRSLK2,T2,Q2,           &
     &            KLCL,KBOT,KTOP,AL,AU)
      DO I=1,N2
        KBOT(I) = min(KLCL(I)-1, ktopm(i)-1)
        KTOP(I) = min(KTOP(I)+1, ktopm(i))
        LSHC(I) = .FALSE.
      ENDDO
      DO K=1,KM-1
        KK = (K-1)*N2
        DO I=1,N2
          IF(K.GE.KBOT(I).AND.K.LT.KTOP(I)) THEN
            IK      = KK + I
            IKU     = IK + N2
            ELDQ    = HVAP * (Q2(IK)-Q2(IKU))
            CPDT    = CP   * (T2(IK)-T2(IKU))
            RTDLS   = (PRSL2(IK)-PRSL2(IKU)) /                          &
     &                 PRSI(index2(i),K+1)*RD*0.5*(T2(IK)+T2(IKU))
            DMSE    = ELDQ + CPDT - RTDLS
            LSHC(I) = LSHC(I).OR.DMSE.GT.0.
            AU(IK)  = G/RTDLS
          ENDIF
        ENDDO
      ENDDO
      K1=KM+1
      K2=0
      DO I=1,N2
        IF(.NOT.LSHC(I)) THEN
          KBOT(I) = KM+1
          KTOP(I) = 0
        ENDIF
        K1 = MIN(K1,KBOT(I))
        K2 = MAX(K2,KTOP(I))
      ENDDO
      KT = K2-K1+1
      IF(KT.LT.2) RETURN
!-----------------------------------------------------------------------
!  SET EDDY VISCOSITY COEFFICIENT CKU AT SIGMA INTERFACES.
!  COMPUTE DIAGONALS AND RHS FOR TRIDIAGONAL MATRIX SOLVER.
!  EXPAND FINAL FIELDS.
      KK = (K1-1) * N2
      DO I=1,N2
        IK     = KK + I
        AD(IK) = 1.
      ENDDO
!
!     DTODSU=DT/DEL(K1)
      DO K=K1,K2-1
!       DTODSL=DTODSU
!       DTODSU=   DT/DEL(K+1)
!       DSIG=SL(K)-SL(K+1)
        KK = (K-1) * N2
        DO I=1,N2
          ii     = index2(i)
          DTODSL = DT/DEL(II,K)
          DTODSU = DT/DEL(II,K+1)
          DSIG   = PRSL(II,K) - PRSL(II,K+1)
          IK     = KK + I
          IKU    = IK + N2
          IF(K.EQ.KBOT(I)) THEN
            CK=1.5
          ELSEIF(K.EQ.KTOP(I)-1) THEN
            CK=1.
          ELSEIF(K.EQ.KTOP(I)-2) THEN
            CK=3.
          ELSEIF(K.GT.KBOT(I).AND.K.LT.KTOP(I)-2) THEN
            CK=5.
          ELSE
            CK=0.
          ENDIF
          DSDZ1   = CK*DSIG*AU(IK)*GOCP
          DSDZ2   = CK*DSIG*AU(IK)*AU(IK)
          AU(IK)  = -DTODSL*DSDZ2
          AL(IK)  = -DTODSU*DSDZ2
          AD(IK)  = AD(IK)-AU(IK)
          AD(IKU) = 1.-AL(IK)
          T2(IK)  = T2(IK)+DTODSL*DSDZ1
          T2(IKU) = T2(IKU)-DTODSU*DSDZ1
        ENDDO
      ENDDO
      IK1=(K1-1)*N2+1
      CALL TRIDI2T3(N2,KT,AL(IK1),AD(IK1),AU(IK1),Q2(IK1),T2(IK1),      &
     &                                  AU(IK1),Q2(IK1),T2(IK1))
      DO K=K1,K2
        KK = (K-1)*N2
        DO I=1,N2
          IK = KK + I
          Q(INDEX2(I),K) = Q2(IK)
          T(INDEX2(I),K) = T2(IK)
        ENDDO
      ENDDO
!-----------------------------------------------------------------------
      RETURN
      END SUBROUTINE SHALCV
!-----------------------------------------------------------------------
      SUBROUTINE TRIDI2T3(L,N,CL,CM,CU,R1,R2,AU,A1,A2)
!yt      INCLUDE DBTRIDI2;
!!
      USE MODULE_GFS_MACHINE , ONLY : kind_phys
      implicit none
      integer             k,n,l,i
      real(kind=kind_phys) fk
!!
      real(kind=kind_phys)                                              &
     &          CL(L,2:N),CM(L,N),CU(L,N-1),R1(L,N),R2(L,N),            &
     &          AU(L,N-1),A1(L,N),A2(L,N)
!-----------------------------------------------------------------------
      DO I=1,L
        FK=1./CM(I,1)
        AU(I,1)=FK*CU(I,1)
        A1(I,1)=FK*R1(I,1)
        A2(I,1)=FK*R2(I,1)
      ENDDO
      DO K=2,N-1
        DO I=1,L
          FK=1./(CM(I,K)-CL(I,K)*AU(I,K-1))
          AU(I,K)=FK*CU(I,K)
          A1(I,K)=FK*(R1(I,K)-CL(I,K)*A1(I,K-1))
          A2(I,K)=FK*(R2(I,K)-CL(I,K)*A2(I,K-1))
        ENDDO
      ENDDO
      DO I=1,L
        FK=1./(CM(I,N)-CL(I,N)*AU(I,N-1))
        A1(I,N)=FK*(R1(I,N)-CL(I,N)*A1(I,N-1))
        A2(I,N)=FK*(R2(I,N)-CL(I,N)*A2(I,N-1))
      ENDDO
      DO K=N-1,1,-1
        DO I=1,L
          A1(I,K)=A1(I,K)-AU(I,K)*A1(I,K+1)
          A2(I,K)=A2(I,K)-AU(I,K)*A2(I,K+1)
        ENDDO
      ENDDO
!-----------------------------------------------------------------------
      RETURN
      END SUBROUTINE TRIDI2T3
!-----------------------------------------------------------------------

      SUBROUTINE MSTADBT3(IM,KM,K1,K2,PRSL,PRSLK,TENV,QENV,             &
     &                  KLCL,KBOT,KTOP,TCLD,QCLD)
!yt      INCLUDE DBMSTADB;
!!
      USE MODULE_GFS_MACHINE, ONLY : kind_phys
      USE MODULE_GFS_FUNCPHYS, ONLY : FTDP, FTHE, FTLCL, STMA
      USE MODULE_GFS_PHYSCONS, EPS => con_eps, EPSM1 => con_epsm1, FV => con_FVirt

      implicit none
!!
!     include 'constant.h'
!!
      integer              k,k1,k2,km,i,im
      real(kind=kind_phys) pv,qma,slklcl,tdpd,thelcl,tlcl
      real(kind=kind_phys) tma,tvcld,tvenv
!!
      real(kind=kind_phys) PRSL(IM,KM), PRSLK(IM,KM), TENV(IM,KM),      &
     &                     QENV(IM,KM), TCLD(IM,KM),  QCLD(IM,KM)
      INTEGER              KLCL(IM),    KBOT(IM),      KTOP(IM)
!  LOCAL ARRAYS
      real(kind=kind_phys) SLKMA(IM), THEMA(IM)
!-----------------------------------------------------------------------
!  DETERMINE WARMEST POTENTIAL WET-BULB TEMPERATURE BETWEEN K1 AND K2.
!  COMPUTE ITS LIFTING CONDENSATION LEVEL.
!
      DO I=1,IM
        SLKMA(I) = 0.
        THEMA(I) = 0.
      ENDDO
      DO K=K1,K2
        DO I=1,IM
          PV   = 1000.0 * PRSL(I,K)*QENV(I,K)/(EPS-EPSM1*QENV(I,K))
          TDPD = TENV(I,K)-FTDP(PV)
          IF(TDPD.GT.0.) THEN
            TLCL   = FTLCL(TENV(I,K),TDPD)
            SLKLCL = PRSLK(I,K)*TLCL/TENV(I,K)
          ELSE
            TLCL   = TENV(I,K)
            SLKLCL = PRSLK(I,K)
          ENDIF
          THELCL=FTHE(TLCL,SLKLCL)
          IF(THELCL.GT.THEMA(I)) THEN
            SLKMA(I) = SLKLCL
            THEMA(I) = THELCL
          ENDIF
        ENDDO
      ENDDO
!-----------------------------------------------------------------------
!  SET CLOUD TEMPERATURES AND HUMIDITIES WHEREVER THE PARCEL LIFTED UP
!  THE MOIST ADIABAT IS BUOYANT WITH RESPECT TO THE ENVIRONMENT.
      DO I=1,IM
        KLCL(I)=KM+1
        KBOT(I)=KM+1
        KTOP(I)=0
      ENDDO
      DO K=1,KM
        DO I=1,IM
          TCLD(I,K)=0.
          QCLD(I,K)=0.
        ENDDO
      ENDDO
      DO K=K1,KM
        DO I=1,IM
          IF(PRSLK(I,K).LE.SLKMA(I)) THEN
            KLCL(I)=MIN(KLCL(I),K)
            CALL STMA(THEMA(I),PRSLK(I,K),TMA,QMA)
!           TMA=FTMA(THEMA(I),PRSLK(I,K),QMA)
            TVCLD=TMA*(1.+FV*QMA)
            TVENV=TENV(I,K)*(1.+FV*QENV(I,K))
            IF(TVCLD.GT.TVENV) THEN
              KBOT(I)=MIN(KBOT(I),K)
              KTOP(I)=MAX(KTOP(I),K)
              TCLD(I,K)=TMA-TENV(I,K)
              QCLD(I,K)=QMA-QENV(I,K)
            ENDIF
          ENDIF
        ENDDO
      ENDDO
!-----------------------------------------------------------------------
      RETURN
      END SUBROUTINE MSTADBT3
     
      END MODULE module_cu_sas
