!WRF:MODEL_LAYER:PHYSICS ! MODULE module_sf_sfclay REAL , PARAMETER :: VCONVC=1. REAL , PARAMETER :: CZO=0.0185 REAL , PARAMETER :: OZO=1.59E-5 REAL, DIMENSION(0:1000 ),SAVE :: PSIMTB,PSIHTB CONTAINS !------------------------------------------------------------------- SUBROUTINE SFCLAY(U3D,V3D,T3D,QV3D,P3D,dz8w, & CP,G,ROVCP,R,XLV,PSFC,CHS,CHS2,CQS2,CPM, & ZNT,UST,PBLH,MAVAIL,ZOL,MOL,REGIME,PSIM,PSIH, & XLAND,HFX,QFX,LH,TSK,FLHC,FLQC,QGH,QSFC,RMOL, & uratx,vratx,tratx, & U10,V10,TH2,T2,Q2, & GZ1OZ0,WSPD,BR,ISFFLX,DX, & SVP1,SVP2,SVP3,SVPT0,EP1,EP2, & KARMAN,EOMEG,STBOLT, & ids,ide, jds,jde, kds,kde, & ims,ime, jms,jme, kms,kme, & its,ite, jts,jte, kts,kte ) !------------------------------------------------------------------- IMPLICIT NONE !------------------------------------------------------------------- !-- U3D 3D u-velocity interpolated to theta points (m/s) !-- V3D 3D v-velocity interpolated to theta points (m/s) !-- T3D temperature (K) !-- QV3D 3D water vapor mixing ratio (Kg/Kg) !-- P3D 3D pressure (Pa) !-- dz8w dz between full levels (m) !-- CP heat capacity at constant pressure for dry air (J/kg/K) !-- G acceleration due to gravity (m/s^2) !-- ROVCP R/CP !-- R gas constant for dry air (J/kg/K) !-- XLV latent heat of vaporization for water (J/kg) !-- PSFC surface pressure (Pa) !-- ZNT roughness length (m) !-- UST u* in similarity theory (m/s) !-- PBLH PBL height from previous time (m) !-- MAVAIL surface moisture availability (between 0 and 1) !-- ZOL z/L height over Monin-Obukhov length !-- MOL T* (similarity theory) (K) !-- REGIME flag indicating PBL regime (stable, unstable, etc.) !-- PSIM similarity stability function for momentum !-- PSIH similarity stability function for heat !-- XLAND land mask (1 for land, 2 for water) !-- HFX upward heat flux at the surface (W/m^2) !-- QFX upward moisture flux at the surface (kg/m^2/s) !-- LH net upward latent heat flux at surface (W/m^2) !-- TSK surface temperature (K) !-- FLHC exchange coefficient for heat (m/s) !-- FLQC exchange coefficient for moisture (m/s) !-- QGH lowest-level saturated mixing ratio !-- uratx ratio of surface U to U10 !-- vratx ratio of surface V to V10 !-- tratx ratio of surface T to TH2 !-- U10 diagnostic 10m u wind !-- V10 diagnostic 10m v wind !-- TH2 diagnostic 2m theta (K) !-- T2 diagnostic 2m temperature (K) !-- Q2 diagnostic 2m mixing ratio (kg/kg) !-- GZ1OZ0 log(z/z0) where z0 is roughness length !-- WSPD wind speed at lowest model level (m/s) !-- BR bulk Richardson number in surface layer !-- ISFFLX isfflx=1 for surface heat and moisture fluxes !-- DX horizontal grid size (m) !-- SVP1 constant for saturation vapor pressure (kPa) !-- SVP2 constant for saturation vapor pressure (dimensionless) !-- SVP3 constant for saturation vapor pressure (K) !-- SVPT0 constant for saturation vapor pressure (K) !-- EP1 constant for virtual temperature (R_v/R_d - 1) (dimensionless) !-- EP2 constant for specific humidity calculation ! (R_d/R_v) (dimensionless) !-- KARMAN Von Karman constant !-- EOMEG angular velocity of earth's rotation (rad/s) !-- STBOLT Stefan-Boltzmann constant (W/m^2/K^4) !-- ids start index for i in domain !-- ide end index for i in domain !-- jds start index for j in domain !-- jde end index for j in domain !-- kds start index for k in domain !-- kde end index for k in domain !-- ims start index for i in memory !-- ime end index for i in memory !-- jms start index for j in memory !-- jme end index for j in memory !-- kms start index for k in memory !-- kme end index for k in memory !-- its start index for i in tile !-- ite end index for i in tile !-- jts start index for j in tile !-- jte end index for j in tile !-- kts start index for k in tile !-- kte end index for k in tile !------------------------------------------------------------------- INTEGER, INTENT(IN ) :: ids,ide, jds,jde, kds,kde, & ims,ime, jms,jme, kms,kme, & its,ite, jts,jte, kts,kte ! INTEGER, INTENT(IN ) :: ISFFLX REAL, INTENT(IN ) :: SVP1,SVP2,SVP3,SVPT0 REAL, INTENT(IN ) :: EP1,EP2,KARMAN,EOMEG,STBOLT ! REAL, DIMENSION( ims:ime, kms:kme, jms:jme ) , & INTENT(IN ) :: dz8w REAL, DIMENSION( ims:ime, kms:kme, jms:jme ) , & INTENT(IN ) :: QV3D, & P3D, & T3D REAL, DIMENSION( ims:ime, jms:jme ) , & INTENT(IN ) :: MAVAIL, & PBLH, & XLAND, & TSK REAL, DIMENSION( ims:ime, jms:jme ) , & INTENT(OUT ) :: U10, & V10, & TH2, & T2, & Q2, & QSFC REAL, DIMENSION( ims:ime, jms:jme ) , & INTENT(OUT) :: uratx,vratx,tratx ! REAL, DIMENSION( ims:ime, jms:jme ) , & INTENT(INOUT) :: REGIME, & HFX, & QFX, & LH, & MOL,RMOL !m the following 5 are change to memory size ! REAL, DIMENSION( ims:ime, jms:jme ) , & INTENT(INOUT) :: GZ1OZ0,WSPD,BR, & PSIM,PSIH REAL, DIMENSION( ims:ime, kms:kme, jms:jme ) , & INTENT(IN ) :: U3D, & V3D REAL, DIMENSION( ims:ime, jms:jme ) , & INTENT(IN ) :: PSFC REAL, DIMENSION( ims:ime, jms:jme ) , & INTENT(INOUT) :: ZNT, & ZOL, & UST, & CPM, & CHS2, & CQS2, & CHS REAL, DIMENSION( ims:ime, jms:jme ) , & INTENT(INOUT) :: FLHC,FLQC REAL, DIMENSION( ims:ime, jms:jme ) , & INTENT(INOUT) :: & QGH REAL, INTENT(IN ) :: CP,G,ROVCP,R,XLV,DX ! LOCAL VARS REAL, DIMENSION( its:ite ) :: U1D, & V1D, & QV1D, & P1D, & T1D REAL, DIMENSION( its:ite ) :: dz8w1d INTEGER :: I,J DO J=jts,jte DO i=its,ite dz8w1d(I) = dz8w(i,1,j) ENDDO DO i=its,ite U1D(i) =U3D(i,1,j) V1D(i) =V3D(i,1,j) QV1D(i)=QV3D(i,1,j) P1D(i) =P3D(i,1,j) T1D(i) =T3D(i,1,j) ENDDO CALL SFCLAY1D(J,U1D,V1D,T1D,QV1D,P1D,dz8w1d, & CP,G,ROVCP,R,XLV,PSFC(ims,j),CHS(ims,j),CHS2(ims,j),& CQS2(ims,j),CPM(ims,j),PBLH(ims,j), RMOL(ims,j), & ZNT(ims,j),UST(ims,j),MAVAIL(ims,j),ZOL(ims,j), & MOL(ims,j),REGIME(ims,j),PSIM(ims,j),PSIH(ims,j), & XLAND(ims,j),HFX(ims,j),QFX(ims,j),TSK(ims,j), & uratx(ims,j),vratx(ims,j),tratx(ims,j), & U10(ims,j),V10(ims,j),TH2(ims,j),T2(ims,j), & Q2(ims,j),FLHC(ims,j),FLQC(ims,j),QGH(ims,j), & QSFC(ims,j),LH(ims,j), & GZ1OZ0(ims,j),WSPD(ims,j),BR(ims,j),ISFFLX,DX, & SVP1,SVP2,SVP3,SVPT0,EP1,EP2,KARMAN,EOMEG,STBOLT, & ids,ide, jds,jde, kds,kde, & ims,ime, jms,jme, kms,kme, & its,ite, jts,jte, kts,kte ) ENDDO END SUBROUTINE SFCLAY !------------------------------------------------------------------- SUBROUTINE SFCLAY1D(J,UX,VX,T1D,QV1D,P1D,dz8w1d, & CP,G,ROVCP,R,XLV,PSFCPA,CHS,CHS2,CQS2,CPM,PBLH,RMOL, & ZNT,UST,MAVAIL,ZOL,MOL,REGIME,PSIM,PSIH, & XLAND,HFX,QFX,TSK, & uratx,vratx,tratx, & U10,V10,TH2,T2,Q2,FLHC,FLQC,QGH, & QSFC,LH,GZ1OZ0,WSPD,BR,ISFFLX,DX, & SVP1,SVP2,SVP3,SVPT0,EP1,EP2, & KARMAN,EOMEG,STBOLT, & ids,ide, jds,jde, kds,kde, & ims,ime, jms,jme, kms,kme, & its,ite, jts,jte, kts,kte ) !------------------------------------------------------------------- IMPLICIT NONE !------------------------------------------------------------------- REAL, PARAMETER :: XKA=2.4E-5 REAL, PARAMETER :: PRT=1. INTEGER, INTENT(IN ) :: ids,ide, jds,jde, kds,kde, & ims,ime, jms,jme, kms,kme, & its,ite, jts,jte, kts,kte, & J ! INTEGER, INTENT(IN ) :: ISFFLX REAL, INTENT(IN ) :: SVP1,SVP2,SVP3,SVPT0 REAL, INTENT(IN ) :: EP1,EP2,KARMAN,EOMEG,STBOLT ! REAL, DIMENSION( ims:ime ) , & INTENT(IN ) :: MAVAIL, & PBLH, & XLAND, & TSK ! REAL, DIMENSION( ims:ime ) , & INTENT(IN ) :: PSFCPA REAL, DIMENSION( ims:ime ) , & INTENT(INOUT) :: REGIME, & HFX, & QFX, & MOL,RMOL !m the following 5 are changed to memory size--- ! REAL, DIMENSION( ims:ime ) , & INTENT(INOUT) :: GZ1OZ0,WSPD,BR, & PSIM,PSIH REAL, DIMENSION( ims:ime ) , & INTENT(INOUT) :: ZNT, & ZOL, & UST, & CPM, & CHS2, & CQS2, & CHS REAL, DIMENSION( ims:ime ) , & INTENT(INOUT) :: FLHC,FLQC REAL, DIMENSION( ims:ime ) , & INTENT(INOUT) :: & QGH REAL, DIMENSION( ims:ime ) , & INTENT(OUT) :: U10,V10, & TH2,T2,Q2,QSFC,LH REAL, DIMENSION( ims:ime ) , & INTENT(OUT) :: uratx,vratx,tratx REAL, INTENT(IN ) :: CP,G,ROVCP,R,XLV,DX ! MODULE-LOCAL VARIABLES, DEFINED IN SUBROUTINE SFCLAY REAL, DIMENSION( its:ite ), INTENT(IN ) :: dz8w1d REAL, DIMENSION( its:ite ), INTENT(IN ) :: UX, & VX, & QV1D, & P1D, & T1D ! LOCAL VARS REAL, DIMENSION( its:ite ) :: ZA, & THVX,ZQKL, & ZQKLP1, & THX,QX, & PSIH2, & PSIM2, & PSIH10, & PSIM10, & GZ2OZ0, & GZ10OZ0 ! REAL, DIMENSION( its:ite ) :: & RHOX,GOVRTH, & TGDSA ! REAL, DIMENSION( its:ite) :: SCR3,SCR4 REAL, DIMENSION( its:ite ) :: THGB, PSFC ! INTEGER :: KL INTEGER :: N,I,K,KK,L,NZOL,NK,NZOL2,NZOL10 REAL :: PL,THCON,TVCON,E1 REAL :: ZL,TSKV,DTHVDZ,DTHVM,VCONV,RZOL,RZOL2,RZOL10,ZOL2,ZOL10 REAL :: DTG,PSIX,USTM,DTTHX,PSIX10,PSIT,PSIT2,PSIQ,PSIQ2 REAL :: FLUXC,VSGD !------------------------------------------------------------------- KL=kte DO i=its,ite ! PSFC cmb PSFC(I)=PSFCPA(I)/1000. ENDDO ! !----CONVERT GROUND TEMPERATURE TO POTENTIAL TEMPERATURE: ! DO 5 I=its,ite TGDSA(I)=TSK(I) ! PSFC cmb THGB(I)=TSK(I)*(100./PSFC(I))**ROVCP 5 CONTINUE ! !-----DECOUPLE FLUX-FORM VARIABLES TO GIVE U,V,T,THETA,THETA-VIR., ! T-VIR., QV, AND QC AT CROSS POINTS AND AT KTAU-1. ! ! *** NOTE *** ! THE BOUNDARY WINDS MAY NOT BE ADEQUATELY AFFECTED BY FRICTION, ! SO USE ONLY INTERIOR VALUES OF UX AND VX TO CALCULATE ! TENDENCIES. ! 10 CONTINUE ! DO 24 I=its,ite ! UX(I)=U1D(I) ! VX(I)=V1D(I) ! 24 CONTINUE 26 CONTINUE !.....SCR3(I,K) STORE TEMPERATURE, ! SCR4(I,K) STORE VIRTUAL TEMPERATURE. DO 30 I=its,ite ! PL cmb PL=P1D(I)/1000. SCR3(I)=T1D(I) THCON=(100./PL)**ROVCP THX(I)=SCR3(I)*THCON SCR4(I)=SCR3(I) THVX(I)=THX(I) QX(I)=0. 30 CONTINUE ! DO I=its,ite QGH(I)=0. FLHC(I)=0. FLQC(I)=0. CPM(I)=CP ENDDO ! ! IF(IDRY.EQ.1)GOTO 80 DO 50 I=its,ite QX(I)=QV1D(I) TVCON=(1.+EP1*QX(I)) THVX(I)=THX(I)*TVCON SCR4(I)=SCR3(I)*TVCON 50 CONTINUE ! DO 60 I=its,ite E1=SVP1*EXP(SVP2*(TGDSA(I)-SVPT0)/(TGDSA(I)-SVP3)) QSFC(I)=EP2*E1/(PSFC(I)-E1) ! QGH CHANGED TO USE LOWEST-LEVEL AIR TEMP CONSISTENT WITH MYJSFC CHANGE ! Q2SAT = QGH IN LSM E1=SVP1*EXP(SVP2*(T1D(I)-SVPT0)/(T1D(I)-SVP3)) QGH(I)=EP2*E1/(PSFC(I)-E1) CPM(I)=CP*(1.+0.8*QX(I)) 60 CONTINUE 80 CONTINUE !-----COMPUTE THE HEIGHT OF FULL- AND HALF-SIGMA LEVELS ABOVE GROUND ! LEVEL, AND THE LAYER THICKNESSES. DO 90 I=its,ite ZQKLP1(I)=0. RHOX(I)=PSFC(I)*1000./(R*SCR4(I)) 90 CONTINUE ! DO 110 I=its,ite ZQKL(I)=dz8w1d(I)+ZQKLP1(I) 110 CONTINUE ! DO 120 I=its,ite ZA(I)=0.5*(ZQKL(I)+ZQKLP1(I)) 120 CONTINUE ! DO 160 I=its,ite GOVRTH(I)=G/THX(I) 160 CONTINUE !-----CALCULATE BULK RICHARDSON NO. OF SURFACE LAYER, ACCORDING TO ! AKB(1976), EQ(12). DO 260 I=its,ite GZ1OZ0(I)=ALOG(ZA(I)/ZNT(I)) GZ2OZ0(I)=ALOG(2./ZNT(I)) GZ10OZ0(I)=ALOG(10./ZNT(I)) IF((XLAND(I)-1.5).GE.0)THEN ZL=ZNT(I) ELSE ZL=0.01 ENDIF WSPD(I)=SQRT(UX(I)*UX(I)+VX(I)*VX(I)) TSKV=THGB(I)*(1.+EP1*QSFC(I)*MAVAIL(I)) DTHVDZ=(THVX(I)-TSKV) ! Convective velocity scale Vc and subgrid-scale velocity Vsg ! following Beljaars (1995, QJRMS) and Mahrt and Sun (1995, MWR) ! ... HONG Aug. 2001 ! ! VCONV = 0.25*sqrt(g/tskv*pblh(i)*dthvm) fluxc = max(hfx(i)/rhox(i)/cp & + ep1*tskv*qfx(i)/rhox(i),0.) VCONV = vconvc*(g/tgdsa(i)*pblh(i)*fluxc)**.33 ! IF(-DTHVDZ.GE.0)THEN ! DTHVM=-DTHVDZ ! ELSE ! DTHVM=0. ! ENDIF ! VCONV = max(vconv,VCONVC*SQRT(DTHVM)) ! VCONV comes from Beljaars only VSGD = 0.32 * (max(dx/5000.-1.,0.))**.33 WSPD(I)=SQRT(WSPD(I)*WSPD(I)+VCONV*VCONV+vsgd*vsgd) WSPD(I)=AMAX1(WSPD(I),0.1) BR(I)=GOVRTH(I)*ZA(I)*DTHVDZ/(WSPD(I)*WSPD(I)) ! IF PREVIOUSLY UNSTABLE, DO NOT LET INTO REGIMES 1 AND 2 IF(MOL(I).LT.0.)BR(I)=AMIN1(BR(I),0.0) !jdf RMOL(I)=-GOVRTH(I)*DTHVDZ*ZA(I)*KARMAN !jdf 260 CONTINUE ! !-----DIAGNOSE BASIC PARAMETERS FOR THE APPROPRIATED STABILITY CLASS: ! ! ! THE STABILITY CLASSES ARE DETERMINED BY BR (BULK RICHARDSON NO.) ! AND HOL (HEIGHT OF PBL/MONIN-OBUKHOV LENGTH). ! ! CRITERIA FOR THE CLASSES ARE AS FOLLOWS: ! ! 1. BR .GE. 0.2; ! REPRESENTS NIGHTTIME STABLE CONDITIONS (REGIME=1), ! ! 2. BR .LT. 0.2 .AND. BR .GT. 0.0; ! REPRESENTS DAMPED MECHANICAL TURBULENT CONDITIONS ! (REGIME=2), ! ! 3. BR .EQ. 0.0 ! REPRESENTS FORCED CONVECTION CONDITIONS (REGIME=3), ! ! 4. BR .LT. 0.0 ! REPRESENTS FREE CONVECTION CONDITIONS (REGIME=4). ! !CCCCC DO 320 I=its,ite !CCCCC !CC REMOVE REGIME 3 DEPENDENCE ON PBL HEIGHT !CC IF(BR(I).LT.0..AND.HOL(I,J).GT.1.5)GOTO 310 IF(BR(I).LT.0.)GOTO 310 ! !-----CLASS 1; STABLE (NIGHTTIME) CONDITIONS: ! IF(BR(I).LT.0.2)GOTO 270 REGIME(I)=1. PSIM(I)=-10.*GZ1OZ0(I) ! LOWER LIMIT ON PSI IN STABLE CONDITIONS PSIM(I)=AMAX1(PSIM(I),-10.) PSIH(I)=PSIM(I) PSIM10(I)=10./ZA(I)*PSIM(I) PSIM10(I)=AMAX1(PSIM10(I),-10.) PSIH10(I)=PSIM10(I) PSIM2(I)=2./ZA(I)*PSIM(I) PSIM2(I)=AMAX1(PSIM2(I),-10.) PSIH2(I)=PSIM2(I) ! 1.0 over Monin-Obukhov length IF(UST(I).LT.0.01)THEN RMOL(I)=BR(I)*GZ1OZ0(I) !ZA/L ELSE RMOL(I)=KARMAN*GOVRTH(I)*ZA(I)*MOL(I)/(UST(I)*UST(I)) !ZA/L ENDIF RMOL(I)=AMIN1(RMOL(I),9.999) ! ZA/L RMOL(I) = RMOL(I)/ZA(I) !1.0/L GOTO 320 ! !-----CLASS 2; DAMPED MECHANICAL TURBULENCE: ! 270 IF(BR(I).EQ.0.0)GOTO 280 REGIME(I)=2. PSIM(I)=-5.0*BR(I)*GZ1OZ0(I)/(1.1-5.0*BR(I)) ! LOWER LIMIT ON PSI IN STABLE CONDITIONS PSIM(I)=AMAX1(PSIM(I),-10.) !.....AKB(1976), EQ(16). PSIH(I)=PSIM(I) PSIM10(I)=10./ZA(I)*PSIM(I) PSIM10(I)=AMAX1(PSIM10(I),-10.) PSIH10(I)=PSIM10(I) PSIM2(I)=2./ZA(I)*PSIM(I) PSIM2(I)=AMAX1(PSIM2(I),-10.) PSIH2(I)=PSIM2(I) ! Linear form: PSIM = -0.5*ZA/L; e.g, see eqn 16 of ! Blackadar, Modeling the nocturnal boundary layer, Preprints, ! Third Symposium on Atmospheric Turbulence Diffusion and Air Quality, ! Raleigh, NC, 1976 ZOL(I) = BR(I)*GZ1OZ0(I)/(1.00001-5.0*BR(I)) if ( ZOL(I) .GT. 0.5 ) then ! linear form ok ! Holtslag and de Bruin, J. App. Meteor 27, 689-704, 1988; ! see also, Launiainen, Boundary-Layer Meteor 76,165-179, 1995 ! Eqn (8) of Launiainen, 1995 ZOL(I) = ( 1.89*GZ1OZ0(I) + 44.2 ) * BR(I)*BR(I) & + ( 1.18*GZ1OZ0(I) - 1.37 ) * BR(I) ZOL(I)=AMIN1(ZOL(I),9.999) end if ! 1.0 over Monin-Obukhov length RMOL(I)= ZOL(I)/ZA(I) GOTO 320 ! !-----CLASS 3; FORCED CONVECTION: ! 280 REGIME(I)=3. PSIM(I)=0.0 PSIH(I)=PSIM(I) PSIM10(I)=0. PSIH10(I)=PSIM10(I) PSIM2(I)=0. PSIH2(I)=PSIM2(I) IF(UST(I).LT.0.01)THEN ZOL(I)=BR(I)*GZ1OZ0(I) ELSE ZOL(I)=KARMAN*GOVRTH(I)*ZA(I)*MOL(I)/(UST(I)*UST(I)) ENDIF RMOL(I) = ZOL(I)/ZA(I) GOTO 320 ! !-----CLASS 4; FREE CONVECTION: ! 310 CONTINUE REGIME(I)=4. IF(UST(I).LT.0.01)THEN ZOL(I)=BR(I)*GZ1OZ0(I) ELSE ZOL(I)=KARMAN*GOVRTH(I)*ZA(I)*MOL(I)/(UST(I)*UST(I)) ENDIF ZOL10=10./ZA(I)*ZOL(I) ZOL2=2./ZA(I)*ZOL(I) ZOL(I)=AMIN1(ZOL(I),0.) ZOL(I)=AMAX1(ZOL(I),-9.9999) ZOL10=AMIN1(ZOL10,0.) ZOL10=AMAX1(ZOL10,-9.9999) ZOL2=AMIN1(ZOL2,0.) ZOL2=AMAX1(ZOL2,-9.9999) NZOL=INT(-ZOL(I)*100.) RZOL=-ZOL(I)*100.-NZOL NZOL10=INT(-ZOL10*100.) RZOL10=-ZOL10*100.-NZOL10 NZOL2=INT(-ZOL2*100.) RZOL2=-ZOL2*100.-NZOL2 PSIM(I)=PSIMTB(NZOL)+RZOL*(PSIMTB(NZOL+1)-PSIMTB(NZOL)) PSIH(I)=PSIHTB(NZOL)+RZOL*(PSIHTB(NZOL+1)-PSIHTB(NZOL)) PSIM10(I)=PSIMTB(NZOL10)+RZOL10*(PSIMTB(NZOL10+1)-PSIMTB(NZOL10)) PSIH10(I)=PSIHTB(NZOL10)+RZOL10*(PSIHTB(NZOL10+1)-PSIHTB(NZOL10)) PSIM2(I)=PSIMTB(NZOL2)+RZOL2*(PSIMTB(NZOL2+1)-PSIMTB(NZOL2)) PSIH2(I)=PSIHTB(NZOL2)+RZOL2*(PSIHTB(NZOL2+1)-PSIHTB(NZOL2)) !---LIMIT PSIH AND PSIM IN THE CASE OF THIN LAYERS AND HIGH ROUGHNESS !--- THIS PREVENTS DENOMINATOR IN FLUXES FROM GETTING TOO SMALL ! PSIH(I)=AMIN1(PSIH(I),0.9*GZ1OZ0(I)) ! PSIM(I)=AMIN1(PSIM(I),0.9*GZ1OZ0(I)) PSIH(I)=AMIN1(PSIH(I),0.9*GZ1OZ0(I)) PSIM(I)=AMIN1(PSIM(I),0.9*GZ1OZ0(I)) PSIH2(I)=AMIN1(PSIH2(I),0.9*GZ2OZ0(I)) PSIM10(I)=AMIN1(PSIM10(I),0.9*GZ10OZ0(I)) RMOL(I) = ZOL(I)/ZA(I) 320 CONTINUE ! !-----COMPUTE THE FRICTIONAL VELOCITY: ! ZA(1982) EQS(2.60),(2.61). ! DO 330 I=its,ite DTG=THX(I)-THGB(I) PSIX=GZ1OZ0(I)-PSIM(I) PSIX10=GZ10OZ0(I)-PSIM10(I) ! LOWER LIMIT ADDED TO PREVENT LARGE FLHC IN SOIL MODEL ! ACTIVATES IN UNSTABLE CONDITIONS WITH THIN LAYERS OR HIGH Z0 PSIT=AMAX1(GZ1OZ0(I)-PSIH(I),2.) IF((XLAND(I)-1.5).GE.0)THEN ZL=ZNT(I) ELSE ZL=0.01 ENDIF PSIQ=ALOG(KARMAN*UST(I)*ZA(I)/XKA+ZA(I)/ZL)-PSIH(I) PSIT2=GZ2OZ0(I)-PSIH2(I) PSIQ2=ALOG(KARMAN*UST(I)*2./XKA+2./ZL)-PSIH2(I) ! TO PREVENT OSCILLATIONS AVERAGE WITH OLD VALUE UST(I)=0.5*UST(I)+0.5*KARMAN*WSPD(I)/PSIX U10(I)=UX(I)*PSIX10/PSIX V10(I)=VX(I)*PSIX10/PSIX TH2(I)=THGB(I)+DTG*PSIT2/PSIT Q2(I)=QSFC(I)+(QX(I)-QSFC(I))*PSIQ2/PSIQ T2(I) = TH2(I)*(PSFC(I)/100.)**ROVCP ! LATER Q2 WILL BE OVERWRITTEN FOR LAND POINTS IN SURFCE ! QA2(I,J) = Q2(I) ! UA10(I,J) = U10(I) ! VA10(I,J) = V10(I) ! write(*,1002)UST(I),KARMAN*WSPD(I),PSIX,KARMAN*WSPD(I)/PSIX ! IF(ABS(U10(I)) .GT. 1.E-10) THEN uratx(I) = UX(I)/U10(I) ELSE uratx(I) = 1.2 END IF IF(ABS(V10(I)) .GT. 1.E-10) THEN vratx(I) = VX(I)/V10(I) ELSE vratx(I) = 1.2 END IF tratx(I) = THX(I)/TH2(I) USTM=AMAX1(UST(I),0.1) IF((XLAND(I)-1.5).GE.0)THEN UST(I)=UST(I) ELSE UST(I)=USTM ENDIF ! write(*,1002)UST(I),USTM,I,J 1002 format(f15.12,2x,f15.12,2x,f15.12,2x,f15.12,2x,f15.12) MOL(I)=KARMAN*DTG/PSIT/PRT 330 CONTINUE ! 335 CONTINUE !-----COMPUTE THE SURFACE SENSIBLE AND LATENT HEAT FLUXES: DO i=its,ite QFX(i)=0. HFX(i)=0. ENDDO IF (ISFFLX.EQ.0) GOTO 410 !-----OVER WATER, ALTER ROUGHNESS LENGTH (ZNT) ACCORDING TO WIND (UST). DO 360 I=its,ite IF((XLAND(I)-1.5).GE.0)THEN ZNT(I)=CZO*UST(I)*UST(I)/G+OZO ENDIF IF((XLAND(I)-1.5).GE.0)THEN ZL=ZNT(I) ELSE ZL=0.01 ENDIF FLQC(I)=RHOX(I)*MAVAIL(I)*UST(I)*KARMAN/( & ALOG(KARMAN*UST(I)*ZA(I)/XKA+ZA(I)/ZL)-PSIH(I)) DTTHX=ABS(THX(I)-THGB(I)) IF(DTTHX.GT.1.E-5)THEN FLHC(I)=CPM(I)*RHOX(I)*UST(I)*MOL(I)/(THX(I)-THGB(I)) ! write(*,1001)FLHC(I),CPM(I),RHOX(I),UST(I),MOL(I),THX(I),THGB(I),I 1001 format(f8.5,2x,f12.7,2x,f12.10,2x,f12.10,2x,f13.10,2x,f12.8,f12.8,2x,i3) ELSE FLHC(I)=0. ENDIF 360 CONTINUE ! !-----COMPUTE SURFACE MOIST FLUX: ! ! IF(IDRY.EQ.1)GOTO 390 ! DO 370 I=its,ite QFX(I)=FLQC(I)*(QSFC(I)-QX(I)) QFX(I)=AMAX1(QFX(I),0.) LH(I)=XLV*QFX(I) 370 CONTINUE !-----COMPUTE SURFACE HEAT FLUX: ! 390 CONTINUE DO 400 I=its,ite IF(XLAND(I)-1.5.GT.0.)THEN HFX(I)=FLHC(I)*(THGB(I)-THX(I)) ELSEIF(XLAND(I)-1.5.LT.0.)THEN HFX(I)=FLHC(I)*(THGB(I)-THX(I)) HFX(I)=AMAX1(HFX(I),-250.) ENDIF 400 CONTINUE DO I=its,ite IF((XLAND(I)-1.5).GE.0)THEN ZL=ZNT(I) ELSE ZL=0.01 ENDIF CHS(I)=UST(I)*KARMAN/(ALOG(KARMAN*UST(I)*ZA(I) & /XKA+ZA(I)/ZL)-PSIH(I)) ! GZ2OZ0(I)=ALOG(2./ZNT(I)) ! PSIM2(I)=-10.*GZ2OZ0(I) ! PSIM2(I)=AMAX1(PSIM2(I),-10.) ! PSIH2(I)=PSIM2(I) CQS2(I)=UST(I)*KARMAN/(ALOG(KARMAN*UST(I)*2.0 & /XKA+2.0/ZL)-PSIH2(I)) CHS2(I)=UST(I)*KARMAN/(GZ2OZ0(I)-PSIH2(I)) ENDDO 410 CONTINUE !jdf ! DO I=its,ite ! IF(UST(I).GE.0.1) THEN ! RMOL(I)=RMOL(I)*(-FLHC(I))/(UST(I)*UST(I)*UST(I)) ! ELSE ! RMOL(I)=RMOL(I)*(-FLHC(I))/(0.1*0.1*0.1) ! ENDIF ! ENDDO !jdf ! END SUBROUTINE SFCLAY1D !==================================================================== SUBROUTINE sfclayinit( allowed_to_read ) LOGICAL , INTENT(IN) :: allowed_to_read INTEGER :: N REAL :: ZOLN,X,Y DO N=0,1000 ZOLN=-FLOAT(N)*0.01 X=(1-16.*ZOLN)**0.25 PSIMTB(N)=2*ALOG(0.5*(1+X))+ALOG(0.5*(1+X*X))- & 2.*ATAN(X)+2.*ATAN(1.) Y=(1-16*ZOLN)**0.5 PSIHTB(N)=2*ALOG(0.5*(1+Y)) ENDDO END SUBROUTINE sfclayinit !------------------------------------------------------------------- END MODULE module_sf_sfclay