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guez |
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SUBROUTINE diagcld1(paprs,pplay,rain,snow,kbot,ktop, & |
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diafra,dialiq) |
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use dimens_m |
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use dimphy |
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use SUPHEC_M |
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IMPLICIT none |
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! |
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! Laurent Li (LMD/CNRS), le 12 octobre 1998 |
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! (adaptation du code ECMWF) |
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! |
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! Dans certains cas, le schema pronostique des nuages n'est |
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! pas suffisament performant. On a donc besoin de diagnostiquer |
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! ces nuages. Je dois avouer que c'est une frustration. |
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! |
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! |
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! Arguments d'entree: |
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REAL, intent(in):: paprs(klon,klev+1) ! pression (Pa) a inter-couche |
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REAL, intent(in):: pplay(klon,klev) ! pression (Pa) au milieu de couche |
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REAL t(klon,klev) ! temperature (K) |
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REAL q(klon,klev) ! humidite specifique (Kg/Kg) |
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REAL rain(klon) ! pluie convective (kg/m2/s) |
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REAL snow(klon) ! neige convective (kg/m2/s) |
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INTEGER ktop(klon) ! sommet de la convection |
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INTEGER kbot(klon) ! bas de la convection |
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! |
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! Arguments de sortie: |
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REAL diafra(klon,klev) ! fraction nuageuse diagnostiquee |
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REAL dialiq(klon,klev) ! eau liquide nuageuse |
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! |
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! Constantes ajustables: |
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REAL CANVA, CANVB, CANVH |
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PARAMETER (CANVA=2.0, CANVB=0.3, CANVH=0.4) |
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REAL CCA, CCB, CCC |
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PARAMETER (CCA=0.125, CCB=1.5, CCC=0.8) |
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REAL CCFCT, CCSCAL |
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PARAMETER (CCFCT=0.400) |
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PARAMETER (CCSCAL=1.0E+11) |
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REAL CETAHB, CETAMB |
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PARAMETER (CETAHB=0.45, CETAMB=0.80) |
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REAL CCLWMR |
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PARAMETER (CCLWMR=1.E-04) |
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REAL ZEPSCR |
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PARAMETER (ZEPSCR=1.0E-10) |
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! |
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! Variables locales: |
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INTEGER i, k |
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REAL zcc(klon) |
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! |
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! Initialisation: |
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! |
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DO k = 1, klev |
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DO i = 1, klon |
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diafra(i,k) = 0.0 |
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dialiq(i,k) = 0.0 |
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ENDDO |
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ENDDO |
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! |
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DO i = 1, klon ! Calculer la fraction nuageuse |
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zcc(i) = 0.0 |
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IF((rain(i)+snow(i)).GT.0.) THEN |
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zcc(i)= CCA * LOG(MAX(ZEPSCR,(rain(i)+snow(i))*CCSCAL))-CCB |
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zcc(i)= MIN(CCC,MAX(0.0,zcc(i))) |
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ENDIF |
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ENDDO |
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! |
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DO i = 1, klon ! pour traiter les enclumes |
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diafra(i,ktop(i)) = MAX(diafra(i,ktop(i)),zcc(i)*CCFCT) |
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IF ((zcc(i).GE.CANVH) .AND. & |
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(pplay(i,ktop(i)).LE.CETAHB*paprs(i,1))) & |
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diafra(i,ktop(i)) = MAX(diafra(i,ktop(i)), & |
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MAX(zcc(i)*CCFCT,CANVA*(zcc(i)-CANVB))) |
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dialiq(i,ktop(i))=CCLWMR*diafra(i,ktop(i)) |
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ENDDO |
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! |
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DO k = 1, klev ! nuages convectifs (sauf enclumes) |
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DO i = 1, klon |
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IF (k.LT.ktop(i) .AND. k.GE.kbot(i)) THEN |
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diafra(i,k)=MAX(diafra(i,k),zcc(i)*CCFCT) |
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dialiq(i,k)=CCLWMR*diafra(i,k) |
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ENDIF |
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ENDDO |
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ENDDO |
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! |
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RETURN |
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END |
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