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C $Header: /u/gcmpack/MITgcm/pkg/aim/phy_vdifsc.F,v 1.6 2002/09/27 20:05:11 jmc Exp $ |
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C $Name: $ |
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|
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#include "AIM_OPTIONS.h" |
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|
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cch SUBROUTINE VDIFSC (UA,VA,SE,RH,QA,QSAT, |
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SUBROUTINE VDIFSC (UA,VA,Ta,RH,QA,QSAT, |
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& UTENVD,VTENVD,TTENVD,QTENVD, |
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& myThid) |
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C- |
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C-- SUBROUTINE VDIFSC (UA,VA,SE,RH,QA,QSAT, |
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C-- & UTENVD,VTENVD,TTENVD,QTENVD) |
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C- |
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C-- Purpose: Compute tendencies of momentum, energy and moisture |
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C-- due to vertical diffusion and shallow convection |
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C-- Input: UA = u-wind (3-dim) |
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C-- VA = v-wind (3-dim) |
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C-- SE = dry static energy (3-dim) |
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C-- RH = relative humidity [0-1] (3-dim) |
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C-- QA = specific humidity [g/kg] (3-dim) |
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C-- QSAT = saturation sp. humidity [g/kg] (3-dim) |
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C-- Output: UTENVD = u-wind tendency (3-dim) |
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C-- VTENVD = v-wind tendency (3-dim) |
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C-- TTENVD = temperature tendency (3-dim) |
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C-- QTENVD = sp. humidity tendency [g/(kg s)] (3-dim) |
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C- |
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|
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IMPLICIT NONE |
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|
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C Resolution parameters |
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|
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C-- size for MITgcm & Physics package : |
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#include "AIM_SIZE.h" |
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|
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#include "EEPARAMS.h" |
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|
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#include "AIM_GRID.h" |
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|
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C Physical constants + functions of sigma and latitude |
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C |
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#include "com_physcon.h" |
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C |
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C Vertical diffusion constants |
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C |
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#include "com_vdicon.h" |
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|
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C-- Routine arguments: |
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INTEGER myThid |
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c REAL UA(NGP,NLEV), VA(NGP,NLEV), SE(NGP,NLEV), |
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_RL UA(NGP,NLEV), VA(NGP,NLEV), Ta(NGP,NLEV), |
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& RH(NGP,NLEV), QA(NGP,NLEV), QSAT(NGP,NLEV) |
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C |
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_RL UTENVD(NGP,NLEV), VTENVD(NGP,NLEV), |
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& TTENVD(NGP,NLEV), QTENVD(NGP,NLEV) |
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|
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#ifdef ALLOW_AIM |
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|
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C-- Local variables: |
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INTEGER NL1(NGP) |
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_RL RTST(NGP) |
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_RL RNL1(NGP) |
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C |
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_RL Th(NGP,NLEV) |
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_RL dThdp |
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_RL stab(NGP) |
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c REAL AUX(NGP) |
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_RL Prefw(NLEV), Prefs(NLEV) |
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DATA Prefs / 75., 250., 500., 775., 950./ |
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DATA Prefw / 0., 150., 350., 650., 900./ |
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_RL Pground |
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DATA pground /1000./ |
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Cchdbg |
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c REAL xindconv1 |
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c SAVE xindconv1 |
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c REAL xindconv |
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c SAVE xindconv |
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c INTEGER npas |
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c SAVE npas |
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c LOGICAL ifirst |
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c DATA ifirst /.TRUE./ |
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c SAVE ifirst |
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INTEGER J,K |
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|
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C- jmc: declare all local variables: |
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_RL RTVD, RTSQ, DMSE, QEQL |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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C-- 1. Initalization |
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C |
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DO K=1,NLEV |
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DO J=1,NGP |
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UTENVD(J,K) = 0. |
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VTENVD(J,K) = 0. |
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TTENVD(J,K) = 0. |
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QTENVD(J,K) = 0. |
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ENDDO |
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ENDDO |
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|
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c |
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C |
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C ***************************************** |
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C ***************************************** |
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Cchdbg |
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C if(ifirst) then |
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C xindconv=0. |
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C xindconv1=0. |
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C npas=0 |
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C ifirst=.FALSE. |
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C endif |
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C npas = npas +1 |
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Cchdbg |
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C ****************************************** |
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C ***************************************** |
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C |
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C-- 2. Vertical diffusion and shallow convection |
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C |
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DO J=1,NGP |
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NL1(J)=NLEVxy(J,myThid)-1 |
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ENDDO |
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C |
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RTVD = -1./(3600.*TRVDI) |
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RTSQ = -1./(3600.*TRSHC) |
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C |
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DO J=1,NGP |
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IF ( NLEVxy(J,myThid) .GT. 0 ) THEN |
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RTST(J) = RTSQ*DSIG(NL1(J)) |
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& /((DSIG(NLEVxy(J,myThid))+DSIG(NL1(J)))*CP) |
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RNL1(J) = -DSIG(NLEVxy(J,myThid))/DSIG(NL1(J)) |
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ENDIF |
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ENDDO |
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|
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C |
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C |
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C New writing of the Conditional stability |
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C ---------------------------------------- |
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DO J=1,NGP |
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IF ( NLEVxy(J,myThid) .GT. 0 ) THEN |
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DO k=NL1(J),NLEVxy(J,myThid) |
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Th(J,K)=Ta(J,K)*(Pground/Prefs(k))**(RD/CP) |
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ENDDO |
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ENDIF |
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ENDDO |
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C |
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DO J=1,NGP |
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stab(J)=0. |
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IF ( NLEVxy(J,myThid) .GT. 0 ) THEN |
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dThdp=(Th(J,NL1(J))-Th(J,NLEVxy(J,myThid))) |
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& *((Prefw(NLEVxy(J,myThid))/Pground)**(RD/CP))*CP |
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stab(J)=dThdp+ALHC*(QSAT(J,NL1(J))-QSAT(J,NLEVxy(J,myThid))) |
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ENDIF |
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ENDDO |
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121 continue |
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C |
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DO J=1,NGP |
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C |
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cch DMSE = (SE(J,NLEVxy(J,myThid))-SE(J,NL1(J)))+ |
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cch & ALHC*(QA(J,NLEVxy(J,myThid))-QSAT(J,NL1(J))) |
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DMSE = - stab(J) |
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IF ( NLEVxy(J,myThid) .GT. 0 ) THEN |
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QEQL = MIN( QA(J,NLEVxy(J,myThid)), |
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& RH(J,NL1(J))*QSAT(J,NLEVxy(J,myThid)) ) |
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cchdbg QEQL = MIN(QA(J,NLEVxy(J,myThid)),QA(J,NL1(J))) |
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ENDIF |
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C |
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IF (DMSE.GE.0.0) THEN |
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C |
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C *************************************************** |
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C *************************************************** |
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C chdbg |
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C if(J.ge.6336 .and. J.eq.6348) then |
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C xindconv=xindconv+1./13. |
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C endif |
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C if(J.ge.4160 .and. J.eq.4172) then |
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C xindconv1=xindconv1+1./13. |
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C endif |
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C if(npas.eq.960 .and. J.eq.1) then |
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C write(0,*) 'xindconv=',xindconv |
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C write(0,*) 'xindconv1=',xindconv1 |
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C endif |
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Cchdbg |
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C **************************************************** |
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C **************************************************** |
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C |
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C 2.1 Shallow convection |
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C |
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IF ( NLEVxy(J,myThid) .GT. 0 ) THEN |
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TTENVD(J,NLEVxy(J,myThid)) = RTST(J)*DMSE |
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TTENVD(J,NL1(J)) = RNL1(J)*TTENVD(J,NLEVxy(J,myThid)) |
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QTENVD(J,NLEVxy(J,myThid)) = |
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& RTSQ*(QA(J,NLEVxy(J,myThid))-QEQL) |
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QTENVD(J,NL1(J)) = RNL1(J)*QTENVD(J,NLEVxy(J,myThid)) |
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ENDIF |
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C |
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ELSE |
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C |
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C 2.2 Vertical diffusion of moisture |
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|
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QTENVD(J,NLEVxy(J,myThid)) = |
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& RTVD*(QA(J,NLEVxy(J,myThid))-QEQL) |
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QTENVD(J,NL1(J)) = RNL1(J)*QTENVD(J,NLEVxy(J,myThid)) |
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C |
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ENDIF |
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C |
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ENDDO |
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C |
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#endif /* ALLOW_AIM */ |
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|
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RETURN |
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END |
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