SUBROUTINE cv3_enthalpmix(len, nd, iflag, plim1, plim2, p, ph, &
        t, q, u, v, w, wi, nk, tmix, thmix, qmix, qsmix, umix, vmix, plcl)
  ! **************************************************************
  ! *
  ! CV3_ENTHALPMIX   Brassage adiabatique d'une couche d'epaisseur *
  ! arbitraire.                                   *
  ! *
  ! written by   : Grandpeix Jean-Yves, 28/12/2001, 13.14.24    *
  ! modified by :  Filiberti M-A 06/2005 vectorisation          *
  ! **************************************************************
  USE lmdz_cvthermo
  USE lmdz_yoethf

  USE lmdz_yomcst

  IMPLICIT NONE
 INCLUDE "FCTTRE.h"
  ! ==============================================================

  ! vertmix : determines theta, t, q, qs, u and v of the mixture generated by
  ! adiabatic mixing of air between plim1 and plim2 with weighting w.
  ! If plim1 and plim2 fall within the same model layer, then theta, ... v
  ! are those of that layer.
  ! A minimum value (dpmin) is imposed upon plim1-plim2

  ! ===============================================================

  !inputs:
  INTEGER, INTENT (IN) :: nd, len
  INTEGER, DIMENSION (len), INTENT (IN) :: nk
  REAL, DIMENSION (len), INTENT (IN) :: plim1, plim2
  REAL, DIMENSION (len, nd), INTENT (IN) :: t, q
  REAL, DIMENSION (len, nd), INTENT (IN) :: u, v
  REAL, DIMENSION (nd), INTENT (IN) :: w
  REAL, DIMENSION (len, nd), INTENT (IN) :: p
  REAL, DIMENSION (len, nd + 1), INTENT (IN) :: ph
  !input/output:
  INTEGER, DIMENSION (len), INTENT (INOUT) :: iflag
  !outputs:
  REAL, DIMENSION (len), INTENT (OUT) :: tmix, thmix, qmix
  REAL, DIMENSION (len), INTENT (OUT) :: umix, vmix
  REAL, DIMENSION (len), INTENT (OUT) :: qsmix
  REAL, DIMENSION (len), INTENT (OUT) :: plcl
  REAL, DIMENSION (len, nd), INTENT (OUT) :: wi
  !internal variables :
  INTEGER i, j
  INTEGER niflag7
  INTEGER, DIMENSION(len) :: j1, j2
  REAL :: a, b
  REAL :: cpn
  REAL :: x, y, p0, p0m1, zdelta, zcor
  REAL, SAVE :: dpmin = 1.
  !$OMP THREADPRIVATE(dpmin)
  REAL, DIMENSION(len) :: plim2p  ! = min(plim2(:),plim1(:)-dpmin)
  REAL, DIMENSION(len) :: akm     ! mixture enthalpy
  REAL, DIMENSION(len) :: dpw, coef
  REAL, DIMENSION(len) :: rdcp, a2, b2, pnk
  REAL, DIMENSION(len) :: rh, chi
  REAL, DIMENSION(len) :: eqwght
  REAL, DIMENSION(len, nd) :: p1, p2


  !!  print *,' ->cv3_vertmix, plim1,plim2 ', plim1,plim2   !jyg
  plim2p(:) = min(plim2(:), plim1(:) - dpmin)
  j1(:) = nd
  j2(:) = 0
  DO j = 1, nd
    DO i = 1, len
      IF (plim1(i)<=ph(i, j)) j1(i) = j
      !!!      IF (plim2p(i)>=ph(i,j+1) .AND. plim2p(i)<ph(i,j)) j2(i) = j
      IF (plim2p(i)< ph(i, j)) j2(i) = j
    END DO
  END DO

  DO j = 1, nd
    DO i = 1, len
      wi(i, j) = 0.
    END DO
  END DO
  DO i = 1, len
    akm(i) = 0.
    qmix(i) = 0.
    umix(i) = 0.
    vmix(i) = 0.
    dpw(i) = 0.
    a2(i) = 0.0
    b2(i) = 0.
    pnk(i) = p(i, nk(i))
  END DO
  eqwght(:) = 0.

  p0 = 1000.
  p0m1 = 1. / p0

  DO i = 1, len
    IF (j2(i) < j1(i)) THEN
      coef(i) = 1.
      eqwght(i) = 1.
    ELSE
      coef(i) = 1. / (plim1(i) - plim2p(i))
    ENDIF
  END DO

  !!  print *,'cv3_vertmix, j1,j2,coef ', j1,j2,coef  !jyg

  DO j = 1, nd
    DO i = 1, len
      IF (j>=j1(i) .AND. j<=j2(i)) THEN
        p1(i, j) = min(ph(i, j), plim1(i))
        p2(i, j) = max(ph(i, j + 1), plim2p(i))
        ! CRtest:couplage thermiques: deja normalise
        ! wi(i,j) = w(j)
        ! PRINT*,'wi',wi(i,j)
        wi(i, j) = w(j) * (p1(i, j) - p2(i, j)) * coef(i) + eqwght(i)
        dpw(i) = dpw(i) + wi(i, j)

        !!  print *,'cv3_vertmix, j, wi(1,j),dpw ', j, wi(1,j),dpw  !jyg

      END IF
    END DO
  END DO

  ! CR:print
  ! do i=1,len
  ! PRINT*,'plim',plim1(i),plim2p(i)
  ! enddo
  DO j = 1, nd
    DO i = 1, len
      IF (j>=j1(i) .AND. j<=j2(i)) THEN
        wi(i, j) = wi(i, j) / dpw(i)
        akm(i) = akm(i) + (cpd * (1. - q(i, j)) + q(i, j) * cpv) * t(i, j) * wi(i, j)
        qmix(i) = qmix(i) + q(i, j) * wi(i, j)
        umix(i) = umix(i) + u(i, j) * wi(i, j)
        vmix(i) = vmix(i) + v(i, j) * wi(i, j)
      END IF
    END DO
  END DO

  DO i = 1, len
    rdcp(i) = (rrd * (1. - qmix(i)) + qmix(i) * rrv) / (cpd * (1. - qmix(i)) + qmix(i) * cpv)
  END DO


  !!  print *,'cv3_vertmix, rdcp ', rdcp  !jyg

  DO j = 1, nd
    DO i = 1, len
      IF (j>=j1(i) .AND. j<=j2(i)) THEN
        ! c            x=(.5*(p1(i,j)+p2(i,j))*p0m1)**rdcp(i)
        y = (.5 * (p1(i, j) + p2(i, j)) / pnk(i))**rdcp(i)
        ! c            a2(i)=a2(i)+(cpd*(1.-qmix(i))+qmix(i)*cpv)*x*wi(i,j)
        b2(i) = b2(i) + (cpd * (1. - qmix(i)) + qmix(i) * cpv) * y * wi(i, j)
      END IF
    END DO
  END DO

  DO i = 1, len
    tmix(i) = akm(i) / b2(i)
    thmix(i) = tmix(i) * (p0 / pnk(i))**rdcp(i)
    ! PRINT*,'thmix akm',akm(i),b2(i)
    ! PRINT*,'thmix t',tmix(i),p0
    ! PRINT*,'thmix p',pnk(i),rdcp(i)
    ! PRINT*,'thmix',thmix(i)
    ! c         thmix(i) = akm(i)/a2(i)
    ! c         tmix(i)= thmix(i)*(pnk(i)*p0m1)**rdcp(i)
    zdelta = max(0., sign(1., rtt - tmix(i)))
    qsmix(i) = r2es * foeew(tmix(i), zdelta) / (pnk(i) * 100.)
    qsmix(i) = min(0.5, qsmix(i))
    zcor = 1. / (1. - retv * qsmix(i))
    qsmix(i) = qsmix(i) * zcor
  END DO

  ! -------------------------------------------------------------------
  ! --- Calculate lifted condensation level of air at parcel origin level
  ! --- (Within 0.2% of formula of Bolton, MON. WEA. REV.,1980)
  ! -------------------------------------------------------------------

  a = 1669.0 ! convect3
  b = 122.0 ! convect3

  niflag7 = 0
  DO i = 1, len

    IF (iflag(i)/=7) THEN ! modif sb Jun7th 2002

      rh(i) = qmix(i) / qsmix(i)
      chi(i) = tmix(i) / (a - b * rh(i) - tmix(i)) ! convect3
      ! ATTENTION, la LIGNE DESSOUS A ETE RAJOUTEE ARBITRAIREMENT ET
      ! MASQUE UN PB POTENTIEL
      chi(i) = max(chi(i), 0.)
      rh(i) = max(rh(i), 0.)
      plcl(i) = pnk(i) * (rh(i)**chi(i))
      IF (((plcl(i)<200.0) .OR. (plcl(i)>=2000.0)) .AND. (iflag(i)==0)) &
              iflag(i) = 8

    ELSE

      niflag7 = niflag7 + 1
      plcl(i) = plim2p(i)

    END IF ! iflag=7

    ! PRINT*,'NIFLAG7  =',niflag7

  END DO

  !!  print *,' cv3_vertmix->'  !jyg

END SUBROUTINE cv3_enthalpmix