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adcroft |
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C $Header: /u/gcmpack/models/MITgcmUV/pkg/aim/Attic/phy_suflux.F,v 1.1.2.2 2001/01/26 17:53:55 adcroft Exp $ |
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C $Name: branch-atmos-merge-freeze $ |
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SUBROUTINE SUFLUX (PSA,UA,VA,TA,QA,RH,QSAT,PHI, |
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* PHI0,FMASK,TLAND,TSEA,SWAV,SSR,SLR, |
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* USTR,VSTR,SHF,EVAP,T0,Q0,QSAT0,SPEED0) |
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C-- |
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C-- SUBROUTINE SUFLUX (PSA,UA,VA,TA,QA,RH,PHI, |
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C-- * PHI0,FMASK,TLAND,TSEA,SWAV, |
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C-- * USTR,VSTR,SHF,EVAP) |
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C-- |
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C-- Purpose: Compute surface fluxes of momentum, energy and moisture |
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C-- Input: PSA = norm. surface pressure [p/p0] (2-dim) |
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C-- UA = u-wind (3-dim) |
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C-- VA = v-wind (3-dim) |
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C-- TA = temperature (3-dim) |
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C-- QA = specific humidity [g/kg] (3-dim) |
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C-- RH = relative humidity (3-dim) |
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C-- PHI = geopotential (3-dim) |
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C-- PHI0 = surface geopotential (2-dim) |
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C-- FMASK = fractional land-sea mask (2-dim) |
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C-- TLAND = land-surface temperature (2-dim) |
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C-- TSEA = sea-surface temperature (2-dim) |
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C-- SWET = soil wetness availability [0-1] (2-dim) |
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C-- Output: USTR = u stress (2-dim) |
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C-- VSTR = v stress (2-dim) |
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C-- SHF = sensible heat flux (2-dim) |
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C-- EVAP = evaporation [g/(m^2 s)] (2-dim) |
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C-- |
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IMPLICIT rEAL*8 (A-H,O-Z) |
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C Resolution parameters |
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#include "atparam.h" |
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#include "atparam1.h" |
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#include "Lev_def.h" |
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C |
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PARAMETER ( NLON=IX, NLAT=IL, NLEV=KX, NGP=NLON*NLAT ) |
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C Physical constants + functions of sigma and latitude |
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#include "com_physcon.h" |
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C Surface flux constants |
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#include "com_sflcon.h" |
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C |
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REAL PSA(NGP), UA(NGP,NLEV), VA(NGP,NLEV), TA(NGP,NLEV), |
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* QA(NGP,NLEV), RH(NGP,NLEV), QSAT(NGP,NLEV), PHI(NGP,NLEV), |
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* PHI0(NGP), FMASK(NGP), TLAND(NGP), TSEA(NGP), SWAV(NGP), |
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* SSR(NGP), SLR(NGP) |
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C |
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REAL USTR(NGP,3), VSTR(NGP,3), SHF(NGP,3), EVAP(NGP,3) |
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C |
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REAL U0(NGP),V0(NGP),T0(NGP,2),Q0(NGP),QSAT0(NGP,2),DENVV(NGP,3) |
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REAL SPEED0(NGP) |
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REAL WORK(NGP) |
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INTEGER NL1(NGP) |
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REAL AUX(NGP) |
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C |
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REAL pSurfs(NLEV) |
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DATA pSurfs /75 _d 2,250 _d 2,500 _d 2,775 _d 2,950 _d 2 / |
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C |
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REAL pSurfw(NLEV) |
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DATA pSurfw /150 _d 2,350 _d 2,650 _d 2,900 _d 2,1000 _d 2/ |
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Cchdbg |
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INTEGER NPAS |
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SAVE NPAS |
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LOGICAL Ifirst |
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SAVE Ifirst |
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DATA Ifirst /.TRUE./ |
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REAL T0moy1(NGP) |
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REAL T0moy2(NGP) |
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SAVE T0moy2, T0moy1 |
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REAL denmoy1(NGP) |
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REAL denmoy2(NGP) |
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SAVE denmoy1, denmoy2 |
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REAL Q0moy(NGP) |
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SAVE Q0moy |
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C |
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C-- 1. Extrapolation of wind, temp, hum. and density to the surface |
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C |
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C 1.1 Wind components |
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C |
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DO J=1,NGP |
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IF ( NLEVxyU(J) .GT. 0 ) THEN |
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U0(J) = FWIND0*UA(J,NLEVxyU(J)) |
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ENDIF |
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IF ( NLEVxyV(J) .GT. 0 ) THEN |
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V0(J) = FWIND0*VA(J,NLEVxyV(J)) |
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ENDIF |
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C U0(J) = UA(J,5) |
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C V0(J) = VA(J,5) |
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ENDDO |
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C |
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C 1.2 Temperature |
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C |
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GTEMP0 = 1.D0-FTEMP0 |
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RCP = 1.D0/CP |
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DO J=1,NGP |
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NL1(J)=NLEVxy(J)-1 |
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ENDDO |
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C |
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DO J=1,NGP |
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IF ( NLEVxy(J) .GT. 0 ) THEN |
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T0(J,1) = TA(J,NLEVxy(J))+WVI(NLEVxy(J),2)* |
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& (TA(J,NLEVxy(J))-TA(J,NL1(J))) |
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ccccc T0(J,2) = TA(J,NLEVxy(J))+RCP*(PHI(J,NLEVxy(J))-PHI0(J)) |
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T0(J,2) = TA(J,NLEVxy(J))* |
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& ((Psurfw(NLEVxy(J))/Psurfs(Nlevxy(J)))**(RD/CP)) |
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ELSE |
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T0(J,1) = 273.16 _d 0 |
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T0(J,2) = 273.16 _d 0 |
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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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T0(J,1) = FTEMP0*T0(J,1)+GTEMP0*T0(J,2) |
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ENDDO |
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C |
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C 1.3 Spec. humidity |
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C |
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GHUM0 = 1. _d 0-FHUM0 |
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C |
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DO J=1,NGP |
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IF ( NLEVxy(J) .GT. 0 ) THEN |
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WORK(J)=RH(J,Nlevxy(J)) |
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cchdbg |
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c WORK(J) = RH(J,NLEVxy(J))+WVI(NLEVxy(J),2)* |
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c & (RH(J,NLEVxy(J))-RH(J,NL1(J))) |
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cchdbg |
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ENDIF |
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ENDDO |
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C |
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CALL SHTORH (-1,NGP,T0,PSA,1. _d 0,Q0,WORK,QSAT0) |
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C |
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DO J=1,NGP |
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IF ( NLEVxy(J) .GT. 0 ) THEN |
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Q0(J)=FHUM0*Q0(J)+GHUM0*QA(J,NLEVxy(J)) |
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ENDIF |
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ENDDO |
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C 1.4 Density * wind speed (including gustiness factor) |
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PRD = P0/RD |
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VG2 = VGUST*VGUST |
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C |
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DO J=1,NGP |
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DENVV(J,3)=(PRD*PSA(J)/T0(J,1))* |
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* SQRT(U0(J)*U0(J)+V0(J)*V0(J)+VG2) |
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cchdbg DENVV(J,3)=0.7*(PRD*PSA(J)/T0(J,1))* |
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cchdbg * SQRT(U0(J)*U0(J)+V0(J)*V0(J)+VG2) |
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SPEED0(J)=SQRT(U0(J)*U0(J)+V0(J)*V0(J)+VG2) |
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ENDDO |
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C |
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C 1.5 Stability correction for heat/moisture fluxes |
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C |
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DTHETAF = 3. _d 0 |
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FSTAB = 0.67 _d 0 |
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RDTH = FSTAB/DTHETAF |
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C |
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DO J=1,NGP |
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FSLAND=1.+MIN(DTHETAF,MAX(-DTHETAF,TLAND(J)-T0(J,2)))*RDTH |
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FSSEA =1.+MIN(DTHETAF,MAX(-DTHETAF, TSEA(J)-T0(J,2)))*RDTH |
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aux(J)=FSLAND |
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DENVV(J,1)=DENVV(J,3)*FSLAND |
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DENVV(J,2)=DENVV(J,3)*FSSEA |
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cchdbg DENVV(J,1)=DENVV(J,3) |
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cchdbg DENVV(J,2)=DENVV(J,3) |
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ENDDO |
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C |
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C-- 2. Computation of fluxes over land and sea |
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C |
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C 2.1 Wind stress |
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C |
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DO J=1,NGP |
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IF ( NLEVxyu(J) .GT. 0 ) THEN |
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USTR(J,1) = -CDL*DENVV(J,3)*UA(J,NLEVxyu(J)) |
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USTR(J,2) = -CDS*DENVV(J,3)*UA(J,NLEVxyu(J)) |
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ENDIF |
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IF ( NLEVxyv(J) .GT. 0 ) THEN |
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VSTR(J,1) = -CDL*DENVV(J,3)*VA(J,NLEVxyv(J)) |
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VSTR(J,2) = -CDS*DENVV(J,3)*VA(J,NLEVxyv(j)) |
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ENDIF |
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ENDDO |
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C |
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C 2.2 Sensible heat flux (from clim. TS over land) |
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C |
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CHLCP = CHL*CP |
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CHSCP = CHS*CP |
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C |
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DO J=1,NGP |
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SHF(J,1) = CHLCP*DENVV(J,1)*(TLAND(J)-T0(J,1)) |
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SHF(J,2) = CHSCP*DENVV(J,2)*(TSEA(J) -T0(J,1)) |
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ENDDO |
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C |
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C **************************************************** |
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cchdbg |
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IF (Ifirst) then |
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npas=0. |
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do J=1,NGP |
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T0moy1(J)=0. |
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T0moy2(J)=0. |
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denmoy1(J)=0. |
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denmoy2(J)=0. |
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Q0moy(J)=0. |
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enddo |
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ifirst=.false. |
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ENDIF |
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C |
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npas=npas+1 |
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DO J=1,NGP |
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T0moy1(J)=T0moy1(J) + T0(J,1) |
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T0moy2(J)=T0moy2(J) + T0(J,2) |
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denmoy1(J)=denmoy1(J) + DENVV(J,1) |
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denmoy2(J)=denmoy2(J) + DENVV(J,2) |
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Q0moy(J)=Q0moy(J) + Q0(J) |
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ENDDO |
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C |
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if(npas.eq.5760) then |
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DO J=1,NGP |
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T0moy1(J)=T0moy1(J)/float(npas) |
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T0moy2(J)=T0moy2(J)/float(npas) |
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denmoy1(J)=denmoy1(J)/float(npas) |
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denmoy2(J)=denmoy2(J)/float(npas) |
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Q0moy(J)=Q0moy(J)/float(npas) |
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ENDDO |
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C |
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open(73,file='Tmoy1',form='unformatted') |
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write(73) T0moy1 |
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close(73) |
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open(74,file='Tmoy2',form='unformatted') |
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write(74) T0moy2 |
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close(74) |
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open(73,file='denmoy1',form='unformatted') |
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write(73) denmoy1 |
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close(73) |
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open(74,file='denmoy2',form='unformatted') |
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write(74) denmoy2 |
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close(74) |
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open(74,file='Q0moy',form='unformatted') |
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write(74) Q0moy |
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close(74) |
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ENDIF |
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C |
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cchdbg |
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C **************************************************** |
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C |
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c CALL DUMP_WRITE2D ( NGP,1,'T0.', nIter,T0 , iErr) |
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c CALL DUMP_WRITE2D ( NGP,3,'DENVV.', nIter,DENVV , iErr) |
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c CALL DUMP_WRITE2D ( NGP,1,'TSEA.', nIter,TSEA , iErr) |
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c CALL DUMP_WRITE2D ( NGP,1,'TLAND.', nIter,TLAND , iErr) |
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c CALL DUMP_WRITE2D ( NGP,1,'AUX.', nIter,aux , iErr) |
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C |
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C 2.3 Evaporation |
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C |
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CALL SHTORH (0,NGP,TLAND,PSA,1. _d 0,QDUMMY,RDUMMY,QSAT0(1,1)) |
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CALL SHTORH (0,NGP,TSEA ,PSA,1. _d 0,QDUMMY,RDUMMY,QSAT0(1,2)) |
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DO J=1,NGP |
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Cdj EVAP(J,1) = CHL*DENVV(J,1)*MAX(0. _d 0,SWAV(J)*QSAT0(J,1)-Q0(J)) |
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EVAP(J,1)=CHL*DENVV(J,1)*MIN(1. _d 0,SWAV(J))*(QSAT0(J,1)-Q0(J)) |
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cdj try new scheme : assume that the net heat flux on land is zero |
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cdj at all time and at all points (this is equivalent |
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cdj to say that the land has a zero heat capacity) |
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cdj EVAP(J,1) = SSR(J)-SLR(J)-SHF(J,1) |
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EVAP(J,2) = CHS*DENVV(J,2)*(QSAT0(J,2)-Q0(J)) |
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ENDDO |
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C-- 3. Weighted average of fluxes according to land-sea mask |
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DO J=1,NGP |
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USTR(J,3) = USTR(J,2)+FMASK(J)*(USTR(J,1)-USTR(J,2)) |
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VSTR(J,3) = VSTR(J,2)+FMASK(J)*(VSTR(J,1)-VSTR(J,2)) |
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SHF(J,3) = SHF(J,2)+FMASK(J)*( SHF(J,1)- SHF(J,2)) |
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EVAP(J,3) = EVAP(J,2)+FMASK(J)*(EVAP(J,1)-EVAP(J,2)) |
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cdj |
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QSAT0(J,1) = QSAT0(J,2)+FMASK(J)*(QSAT0(J,1)-QSAT0(J,2)) |
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cdj |
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ENDDO |
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C-- |
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RETURN |
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END |
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