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! |
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SUBROUTINE cv_closure(nloc,ncum,nd,nk,icb & |
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,tv,tvp,p,ph,dph,plcl,cpn & |
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,iflag,cbmf) |
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use cvthermo |
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use cvparam |
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implicit none |
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|
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! inputs: |
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integer ncum, nd, nloc |
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integer nk(nloc), icb(nloc) |
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real tv(nloc,nd), tvp(nloc,nd), p(nloc,nd), dph(nloc,nd) |
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real ph(nloc,nd+1) ! caution nd instead ndp1 to be consistent... |
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real plcl(nloc), cpn(nloc,nd) |
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|
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! outputs: |
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integer iflag(nloc) |
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real cbmf(nloc) ! also an input |
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|
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! local variables: |
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integer i, k, icbmax |
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real dtpbl(nloc), dtmin(nloc), tvpplcl(nloc), tvaplcl(nloc) |
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real work(nloc) |
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|
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|
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!------------------------------------------------------------------- |
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! Compute icbmax. |
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!------------------------------------------------------------------- |
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|
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icbmax=2 |
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do 230 i=1,ncum |
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icbmax=max(icbmax,icb(i)) |
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230 continue |
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|
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!===================================================================== |
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! --- CALCULATE CLOUD BASE MASS FLUX |
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!===================================================================== |
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! |
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! tvpplcl = parcel temperature lifted adiabatically from level |
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! icb-1 to the LCL. |
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! tvaplcl = virtual temperature at the LCL. |
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! |
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do 610 i=1,ncum |
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dtpbl(i)=0.0 |
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tvpplcl(i)=tvp(i,icb(i)-1) & |
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-rrd*tvp(i,icb(i)-1)*(p(i,icb(i)-1)-plcl(i)) & |
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/(cpn(i,icb(i)-1)*p(i,icb(i)-1)) |
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tvaplcl(i)=tv(i,icb(i)) & |
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+(tvp(i,icb(i))-tvp(i,icb(i)+1))*(plcl(i)-p(i,icb(i))) & |
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/(p(i,icb(i))-p(i,icb(i)+1)) |
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610 continue |
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|
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!------------------------------------------------------------------- |
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! --- Interpolate difference between lifted parcel and |
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! --- environmental temperatures to lifted condensation level |
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!------------------------------------------------------------------- |
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! |
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! dtpbl = average of tvp-tv in the PBL (k=nk to icb-1). |
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! |
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do 630 k=minorig,icbmax |
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do 620 i=1,ncum |
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if((k.ge.nk(i)).and.(k.le.(icb(i)-1)))then |
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dtpbl(i)=dtpbl(i)+(tvp(i,k)-tv(i,k))*dph(i,k) |
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endif |
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620 continue |
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630 continue |
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do 640 i=1,ncum |
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dtpbl(i)=dtpbl(i)/(ph(i,nk(i))-ph(i,icb(i))) |
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dtmin(i)=tvpplcl(i)-tvaplcl(i)+dtmax+dtpbl(i) |
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640 continue |
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! |
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!------------------------------------------------------------------- |
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! --- Adjust cloud base mass flux |
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!------------------------------------------------------------------- |
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! |
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do 650 i=1,ncum |
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work(i)=cbmf(i) |
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cbmf(i)=max(0.0,(1.0-damp)*cbmf(i)+0.1*alpha*dtmin(i)) |
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if((work(i).eq.0.0).and.(cbmf(i).eq.0.0))then |
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iflag(i)=3 |
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endif |
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650 continue |
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|
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return |
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end |
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