source: LMDZ5/trunk/libf/phylmd/cv3_vertmix.F90 @ 1999

SUBROUTINE cv3_vertmix(len, nd, iflag, plim1, plim2, p, ph, t, q, u, v, w, &
    wi, nk, tmix, thmix, qmix, qsmix, umix, vmix, plcl)
  ! **************************************************************
  ! *
  ! CV3_VERTMIX   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          *
  ! **************************************************************

  IMPLICIT NONE
  ! ==============================================================

  ! vertmix : determine theta et r du melange obtenu en brassant
  ! adiabatiquement entre plim1 et plim2, avec une ponderation w.

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

  include "cvthermo.h"
  include "YOETHF.h"
  include "YOMCST.h"
  include "FCTTRE.h"
  ! input :
  INTEGER nd, len
  INTEGER nk(len), iflag(len)
  REAL t(len, nd), q(len, nd), w(nd)
  REAL u(len, nd), v(len, nd)
  REAL p(len, nd), ph(len, nd+1)
  REAL plim1(len), plim2(len)
  ! output :
  REAL tmix(len), thmix(len), qmix(len), wi(len, nd)
  REAL umix(len), vmix(len)
  REAL qsmix(len)
  REAL plcl(len)
  ! internal variables :
  INTEGER j1(len), j2(len), niflag7
  REAL a, b
  REAL ahm(len), dpw(len), coef(len)
  REAL p1(len, nd), p2(len, nd)
  REAL rdcp(len), a2(len), b2(len), pnk(len)
  REAL rh(len), chi(len)
  REAL cpn
  REAL x, y, p0, p0m1, zdelta, zcor

  INTEGER i, j

  DO j = 1, nd
    DO i = 1, len
      IF (plim1(i)<=ph(i,j)) j1(i) = j
      IF (plim2(i)>=ph(i,j+1) .AND. plim2(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
    ahm(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

  p0 = 1000.
  p0m1 = 1./p0

  DO i = 1, len
    coef(i) = 1./(plim1(i)-plim2(i))
  END DO

  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), plim2(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)
        dpw(i) = dpw(i) + wi(i, j)
      END IF
    END DO
  END DO
  ! CR:print
  ! do i=1,len
  ! print*,'plim',plim1(i),plim2(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)
        ahm(i) = ahm(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



  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) = ahm(i)/b2(i)
    thmix(i) = tmix(i)*(p0/pnk(i))**rdcp(i)
    ! print*,'thmix ahm',ahm(i),b2(i)
    ! print*,'thmix t',tmix(i),p0
    ! print*,'thmix p',pnk(i),rdcp(i)
    ! print*,'thmix',thmix(i)
    ! c         thmix(i) = ahm(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) = plim2(i)

    END IF ! iflag=7

    ! print*,'NIFLAG7  =',niflag7

  END DO

  RETURN
END SUBROUTINE cv3_vertmix