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SUBROUTINE cv_feed(len,nd,t,q,qs,p,hm,gz & |
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,nk,icb,icbmax,iflag,tnk,qnk,gznk,plcl) |
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use cvparam |
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implicit none |
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|
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!================================================================ |
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! Purpose: CONVECTIVE FEED |
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!================================================================ |
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|
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! inputs: |
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integer len, nd |
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real, intent(in):: t(len,nd) |
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real q(len,nd), qs(len,nd), p(len,nd) |
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real hm(len,nd), gz(len,nd) |
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|
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! outputs: |
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integer iflag(len), nk(len), icb(len), icbmax |
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real tnk(len), qnk(len), gznk(len), plcl(len) |
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|
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! local variables: |
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integer i, k |
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integer ihmin(len) |
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real work(len) |
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real pnk(len), qsnk(len), rh(len), chi(len) |
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|
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!------------------------------------------------------------------- |
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! --- Find level of minimum moist static energy |
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! --- If level of minimum moist static energy coincides with |
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! --- or is lower than minimum allowable parcel origin level, |
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! --- set iflag to 6. |
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!------------------------------------------------------------------- |
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|
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do 180 i=1,len |
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work(i)=1.0e12 |
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ihmin(i)=nl |
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180 continue |
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do 200 k=2,nlp |
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do 190 i=1,len |
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if((hm(i,k).lt.work(i)).and. & |
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(hm(i,k).lt.hm(i,k-1)))then |
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work(i)=hm(i,k) |
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ihmin(i)=k |
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endif |
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190 continue |
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200 continue |
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do 210 i=1,len |
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ihmin(i)=min(ihmin(i),nlm) |
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if(ihmin(i).le.minorig)then |
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iflag(i)=6 |
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endif |
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210 continue |
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! |
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!------------------------------------------------------------------- |
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! --- Find that model level below the level of minimum moist static |
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! --- energy that has the maximum value of moist static energy |
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!------------------------------------------------------------------- |
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|
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do 220 i=1,len |
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work(i)=hm(i,minorig) |
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nk(i)=minorig |
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220 continue |
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do 240 k=minorig+1,nl |
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do 230 i=1,len |
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if((hm(i,k).gt.work(i)).and.(k.le.ihmin(i)))then |
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work(i)=hm(i,k) |
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nk(i)=k |
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endif |
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230 continue |
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240 continue |
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!------------------------------------------------------------------- |
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! --- Check whether parcel level temperature and specific humidity |
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! --- are reasonable |
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!------------------------------------------------------------------- |
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do 250 i=1,len |
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if(((t(i,nk(i)).lt.250.0).or. & |
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(q(i,nk(i)).le.0.0).or. & |
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(p(i,ihmin(i)).lt.400.0)).and. & |
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(iflag(i).eq.0))iflag(i)=7 |
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250 continue |
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!------------------------------------------------------------------- |
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! --- Calculate lifted condensation level of air at parcel origin level |
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! --- (Within 0.2% of formula of Bolton, MON. WEA. REV.,1980) |
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!------------------------------------------------------------------- |
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do 260 i=1,len |
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tnk(i)=t(i,nk(i)) |
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qnk(i)=q(i,nk(i)) |
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gznk(i)=gz(i,nk(i)) |
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pnk(i)=p(i,nk(i)) |
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qsnk(i)=qs(i,nk(i)) |
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! |
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rh(i)=qnk(i)/qsnk(i) |
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rh(i)=min(1.0,rh(i)) |
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chi(i)=tnk(i)/(1669.0-122.0*rh(i)-tnk(i)) |
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plcl(i)=pnk(i)*(rh(i)**chi(i)) |
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if(((plcl(i).lt.200.0).or.(plcl(i).ge.2000.0)) & |
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.and.(iflag(i).eq.0))iflag(i)=8 |
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260 continue |
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!------------------------------------------------------------------- |
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! --- Calculate first level above lcl (=icb) |
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!------------------------------------------------------------------- |
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do 270 i=1,len |
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icb(i)=nlm |
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270 continue |
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! |
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do 290 k=minorig,nl |
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do 280 i=1,len |
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if((k.ge.(nk(i)+1)).and.(p(i,k).lt.plcl(i))) & |
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icb(i)=min(icb(i),k) |
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280 continue |
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290 continue |
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! |
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do 300 i=1,len |
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if((icb(i).ge.nlm).and.(iflag(i).eq.0))iflag(i)=9 |
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300 continue |
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! |
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! Compute icbmax. |
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! |
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icbmax=2 |
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do 310 i=1,len |
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icbmax=max(icbmax,icb(i)) |
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310 continue |
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|
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return |
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end |
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