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module cv30_trigger_m |
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SUBROUTINE cv3_trigger(len,nd,icb,plcl,p,th,tv,tvp & |
implicit none |
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,pbase,buoybase,iflag,sig,w0) |
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use cv3_param_m |
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implicit none |
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!------------------------------------------------------------------- |
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! --- TRIGGERING |
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! |
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! - computes the cloud base |
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! - triggering (crude in this version) |
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! - relaxation of sig and w0 when no convection |
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! |
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! Caution1: if no convection, we set iflag=4 |
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! (it used to be 0 in convect3) |
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! |
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! Caution2: at this stage, tvp (and thus buoy) are know up |
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! through icb only! |
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! -> the buoyancy below cloud base not (yet) set to the cloud base buoyancy |
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!------------------------------------------------------------------- |
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! input: |
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integer len, nd |
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integer icb(len) |
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real plcl(len), p(len,nd) |
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real th(len,nd), tv(len,nd), tvp(len,nd) |
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! output: |
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real pbase(len), buoybase(len) |
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! input AND output: |
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integer iflag(len) |
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real sig(len,nd), w0(len,nd) |
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! local variables: |
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integer i,k |
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real tvpbase, tvbase, tdif, ath, ath1 |
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! |
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! *** set cloud base buoyancy at (plcl+dpbase) level buoyancy |
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! |
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do 100 i=1,len |
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pbase(i) = plcl(i) + dpbase |
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tvpbase = tvp(i,icb(i))*(pbase(i)-p(i,icb(i)+1)) & |
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/(p(i,icb(i))-p(i,icb(i)+1)) & |
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+ tvp(i,icb(i)+1)*(p(i,icb(i))-pbase(i)) & |
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/(p(i,icb(i))-p(i,icb(i)+1)) |
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tvbase = tv(i,icb(i))*(pbase(i)-p(i,icb(i)+1)) & |
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/(p(i,icb(i))-p(i,icb(i)+1)) & |
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+ tv(i,icb(i)+1)*(p(i,icb(i))-pbase(i)) & |
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/(p(i,icb(i))-p(i,icb(i)+1)) |
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buoybase(i) = tvpbase - tvbase |
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100 continue |
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! |
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! *** make sure that column is dry adiabatic between the surface *** |
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! *** and cloud base, and that lifted air is positively buoyant *** |
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! *** at cloud base *** |
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! *** if not, return to calling program after resetting *** |
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! *** sig(i) and w0(i) *** |
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! |
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! oct3 do 200 i=1,len |
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! oct3 |
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! oct3 tdif = buoybase(i) |
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! oct3 ath1 = th(i,1) |
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! oct3 ath = th(i,icb(i)-1) - dttrig |
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! oct3 |
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! oct3 if (tdif.lt.dtcrit .or. ath.gt.ath1) then |
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! oct3 do 60 k=1,nl |
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! oct3 sig(i,k) = beta*sig(i,k) - 2.*alpha*tdif*tdif |
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! oct3 sig(i,k) = AMAX1(sig(i,k),0.0) |
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! oct3 w0(i,k) = beta*w0(i,k) |
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! oct3 60 continue |
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! oct3 iflag(i)=4 ! pour version vectorisee |
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! oct3c convect3 iflag(i)=0 |
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! oct3cccc return |
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! oct3 endif |
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! oct3 |
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! oct3200 continue |
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! -- oct3: on reecrit la boucle 200 (pour la vectorisation) |
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do 60 k=1,nl |
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do 200 i=1,len |
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tdif = buoybase(i) |
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ath1 = th(i,1) |
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ath = th(i,icb(i)-1) - dttrig |
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if (tdif.lt.dtcrit .or. ath.gt.ath1) then |
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sig(i,k) = beta*sig(i,k) - 2.*alpha*tdif*tdif |
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sig(i,k) = AMAX1(sig(i,k),0.0) |
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w0(i,k) = beta*w0(i,k) |
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iflag(i)=4 ! pour version vectorisee |
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! convect3 iflag(i)=0 |
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endif |
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200 continue |
contains |
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60 continue |
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! fin oct3 -- |
SUBROUTINE cv30_trigger(icb1, plcl1, p1, th1, tv1, tvp1, pbase1, buoybase1, & |
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iflag1, sig1, w01) |
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return |
! Triggering: |
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end |
! - computes the cloud base |
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! - triggering (crude in this version) |
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! - relaxation of sig1 and w01 when no convection |
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! Caution 1: if no convection, we set iflag1 = 4 |
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! Caution 2: at this stage, tvp1 (and thus buoy) are known up |
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! through icb1 only! -> the buoyancy below cloud base not (yet) |
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! set to the cloud base buoyancy |
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use cv30_param_m, only: alpha, beta, dtcrit, nl |
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USE dimphy, ONLY: klev, klon |
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integer, intent(in):: icb1(klon) |
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! first level above LCL, 2 <= icb1 <= nl - 2 |
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real, intent(in):: plcl1(klon), p1(klon, klev) |
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real, intent(in):: th1(:, :) ! (klon, nl) |
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real, intent(in):: tv1(klon, klev), tvp1(klon, klev) |
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real, intent(out):: pbase1(klon), buoybase1(klon) |
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integer, intent(inout):: iflag1(klon) |
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real, intent(inout):: sig1(klon, klev), w01(klon, klev) |
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! Local: |
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real, parameter:: dttrig = 5. ! (loose) condition for triggering |
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real, parameter:: dpbase = - 40. ! definition cloud base (400 m above LCL) |
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integer i, k |
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real tvpbase, tvbase |
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!--------------------------------------------------------------------- |
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! Set cloud base buoyancy at plcl1 + dpbase level buoyancy: |
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do i = 1, klon |
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pbase1(i) = plcl1(i) + dpbase |
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tvpbase = tvp1(i, icb1(i)) * (pbase1(i) - p1(i, icb1(i) + 1)) & |
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/(p1(i, icb1(i)) - p1(i, icb1(i) + 1)) & |
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+ tvp1(i, icb1(i) + 1) * (p1(i, icb1(i)) - pbase1(i)) & |
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/(p1(i, icb1(i)) - p1(i, icb1(i) + 1)) |
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tvbase = tv1(i, icb1(i)) * (pbase1(i) - p1(i, icb1(i) + 1)) & |
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/(p1(i, icb1(i)) - p1(i, icb1(i) + 1)) & |
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+ tv1(i, icb1(i) + 1) * (p1(i, icb1(i)) - pbase1(i)) & |
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/(p1(i, icb1(i)) - p1(i, icb1(i) + 1)) |
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buoybase1(i) = tvpbase - tvbase |
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end do |
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! Make sure that column is dry adiabatic between the surface and |
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! cloud base, and that lifted air is positively buoyant at cloud |
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! base. If not, return to calling program after resetting sig1(i) |
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! and w01(i). |
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do k = 1, nl |
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do i = 1, klon |
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if (buoybase1(i) < dtcrit .or. th1(i, icb1(i) - 1) - dttrig & |
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> th1(i, 1)) then |
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sig1(i, k) = MAX(beta * sig1(i, k) - 2. * alpha & |
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* buoybase1(i)**2, 0.) |
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w01(i, k) = beta * w01(i, k) |
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iflag1(i) = 4 |
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endif |
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end do |
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end do |
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end SUBROUTINE cv30_trigger |
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end module cv30_trigger_m |
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