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!MNH_LIC Copyright 2018-2019 CNRS, Meteo-France and Universite Paul Sabatier
!MNH_LIC This is part of the Meso-NH software governed by the CeCILL-C licence
!MNH_LIC version 1. See LICENSE, CeCILL-C_V1-en.txt and CeCILL-C_V1-fr.txt
!MNH_LIC for details. version 1.
!-----------------------------------------------------------------
! Modifications:
! P. Wautelet 28/05/2018: corrected truncated integer division (1*10**(-6) -> 1E-6)
! P. Wautelet 28/05/2019: move COUNTJV function to tools.f90
!-----------------------------------------------------------------
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! ####################
MODULE MODI_SUBL_BLOWSNOW
! ####################
!
INTERFACE
SUBROUTINE SUBL_BLOWSNOW(PZZ, PRHODJ , PRHODREF, PEXNREF , PPABST, &
PTHT, PRVT, PRCT, PRRT, PRIT, PRST, PRGT, PSVT, &
PTHS, PRVS, PSVS,PSNWSUBL3D,PVGK)
REAL, DIMENSION(:,:,:), INTENT(IN) :: PZZ ! Height (z)
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRHODJ ! Dry density * Jacobian
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRHODREF! Reference density
REAL, DIMENSION(:,:,:), INTENT(IN) :: PEXNREF ! Reference Exner function
REAL, DIMENSION(:,:,:), INTENT(IN) :: PPABST ! absolute pressure at t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PTHT ! Theta at time t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRVT ! Water vapor m.r. at t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRCT ! Cloud water m.r. at t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRRT ! Rain water m.r. at t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRIT ! Pristine ice m.r. at t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRST ! Snow/aggregate m.r. at t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRGT ! Graupel/hail m.r. at t
REAL, DIMENSION(:,:,:,:), INTENT(IN) :: PSVT ! Blowing snow concentration
REAL, DIMENSION(:,:,:), INTENT(IN) :: PVGK ! Mass averaged settling velocity
REAL, DIMENSION(:,:,:), INTENT(INOUT) :: PTHS ! Theta source
REAL, DIMENSION(:,:,:), INTENT(INOUT) :: PRVS ! Water vapor m.r. source
REAL, DIMENSION(:,:,:,:), INTENT(INOUT) :: PSVS ! Blowing snow source
REAL, DIMENSION(:,:,:), INTENT(INOUT) :: PSNWSUBL3D ! Blowing snow sublimation flux (kg/m3/s)
END SUBROUTINE SUBL_BLOWSNOW
END INTERFACE
END MODULE MODI_SUBL_BLOWSNOW
SUBROUTINE SUBL_BLOWSNOW(PZZ, PRHODJ , PRHODREF, PEXNREF , PPABST, &
PTHT, PRVT, PRCT, PRRT, PRIT, PRST, PRGT, PSVT, &
PTHS, PRVS, PSVS,PSNWSUBL3D,PVGK)
USE MODD_BLOWSNOW
USE MODD_CST
USE MODD_CSTS_BLOWSNOW
USE MODD_PARAMETERS
USE MODE_BLOWSNOW_PSD
use mode_tools, only: Countjv
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USE MODI_GAMMA
USE MODI_GAMMA_INC
USE MODI_GAMMA_INC_LOW
IMPLICIT NONE
!
!* 0.1 Declarations of dummy arguments :
!
!
REAL, DIMENSION(:,:,:), INTENT(IN) :: PZZ ! Height (z)
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRHODJ ! Dry density * Jacobian
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRHODREF! Reference density
REAL, DIMENSION(:,:,:), INTENT(IN) :: PEXNREF ! Reference Exner function
REAL, DIMENSION(:,:,:), INTENT(IN) :: PPABST ! absolute pressure at t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PTHT ! Theta at time t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRVT ! Water vapor m.r. at t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRCT ! Cloud water m.r. at t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRRT ! Rain water m.r. at t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRIT ! Pristine ice m.r. at t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRST ! Snow/aggregate m.r. at t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PRGT ! Graupel/hail m.r. at t
REAL, DIMENSION(:,:,:,:), INTENT(INOUT) :: PSVT ! Drifting snow concentration at t
REAL, DIMENSION(:,:,:), INTENT(IN) :: PVGK ! ! Mass averaged settling velocity
REAL, DIMENSION(:,:,:), INTENT(INOUT) :: PTHS ! Theta source
REAL, DIMENSION(:,:,:), INTENT(INOUT) :: PRVS ! Water vapor m.r. source
REAL, DIMENSION(:,:,:,:), INTENT(INOUT) :: PSVS ! Drifting snow source
REAL, DIMENSION(:,:,:), INTENT(INOUT) :: PSNWSUBL3D ! Drifting snow sublimation flux (kg/m3/s)
!
!* 0.2 Declarations of local variables :
!
!
INTEGER :: JN ! Loop index for numerical integration
INTEGER :: IIB ! Define the domain where is
INTEGER :: IIE ! the microphysical sources have to be computed
INTEGER :: IJB !
INTEGER :: IJE !
INTEGER :: IKB !
INTEGER :: IKE !
!
REAL, DIMENSION(SIZE(PSVT,1),SIZE(PSVT,2),SIZE(PSVT,3)) :: ZBETA
REAL, DIMENSION(SIZE(PSVT,1),SIZE(PSVT,2),SIZE(PSVT,3)) :: ZT
REAL, DIMENSION(SIZE(PEXNREF,1),SIZE(PEXNREF,2),SIZE(PEXNREF,3)) &
:: ZW ! work array
LOGICAL, DIMENSION(SIZE(PEXNREF,1),SIZE(PEXNREF,2),SIZE(PEXNREF,3)) &
:: GSUBL ! Test where to compute sublimation
REAL, DIMENSION(:), ALLOCATABLE :: ZRVT ! Water vapor m.r. at t
REAL, DIMENSION(:), ALLOCATABLE :: ZRCT ! Cloud water m.r. at t
REAL, DIMENSION(:), ALLOCATABLE :: ZRRT ! Rain water m.r. at t
REAL, DIMENSION(:), ALLOCATABLE :: ZRIT ! Pristine ice m.r. at t
REAL, DIMENSION(:), ALLOCATABLE :: ZRST ! Snow/aggregate m.r. at t
REAL, DIMENSION(:), ALLOCATABLE :: ZRGT ! Graupel m.r. at t
REAL, DIMENSION(:), ALLOCATABLE :: ZRVS ! Water vapor m.r. source
REAL, DIMENSION(:,:), ALLOCATABLE :: ZSVT ! Drifting snow m.r. at t
REAL, DIMENSION(:,:), ALLOCATABLE :: ZSVS ! Drifting snow m.r. source
REAL, DIMENSION(:), ALLOCATABLE :: ZTHS ! Theta source
INTEGER, DIMENSION(:), ALLOCATABLE :: NMAX ! Maximum index for numerical integration
REAL, DIMENSION(:), ALLOCATABLE &
:: ZZT, & ! Temperature
ZRHODREF, & ! RHO Dry REFerence
ZPRES, & ! Pressure
ZKA, & ! Thermal conductivity of the air
ZDV, & ! Diffusivity of water vapor in the air
ZUSI, & ! Undersaturation over ice
ZZW, & ! Work array
ZAI, & ! Denominator in Thorpe and Masson (66) formulation
ZAA, & ! Constant in Carrier's equation for settling velocity
ZBB, & ! Constant in Carrier's equation for settling velocity
ZR1, & ! 1st limit radius in Mitchell's formulation
ZR2, & ! 2nd limit radius in Mitchell's formulation
ZAM1, & ! Constant in Mitchell's fall speed : v = a * R^b
ZAM2, & ! Constant in Mitchell's fall speed : v = a * R^b
ZAM3, & ! Constant in Mitchell's fall speed : v = a * R^b
ZZBETA, & ! Scale parameter
ZEXNREF, & ! EXNer Pressure REFerence
ZMU, & ! Air kinematic viscosity
ZZZ, & ! Height
ZLSFACT, & ! L_s/(Pi_ref*C_ph)
ZSNWSUBL, & ! Snow sublimation rate kg.m{-3}.s{-1}
ZVGK ! Mass averaged settling velocity
REAL :: ZGAM,ZVEL_CARRIER,ZR,ZVEL_VENT
REAL :: ZW_M0, ZNU , ZMASS
REAL :: ZSUM_SUBL,ZNUM,ZMOB,ZTEMP
REAL :: ZDELTAR
REAL :: ZGAM_BM1,ZGAM_BM2,ZGAM_BM3
REAL :: ZR_EFF
INTEGER :: IMICRO
INTEGER , DIMENSION(SIZE(GSUBL)) :: I1,I2,I3 ! Used to replace the COUNT
INTEGER :: JL, JSV ! and PACK intrinsics
LOGICAL :: LNONEFFICIENT
LOGICAL :: LSUBL_PIEKTUK
LOGICAL :: LSUBL_ALPINE3D
!
! Initialize variables
ZDELTAR = 1e-6 ! Bin size (m)
ZGAM = GAMMA(XALPHA_SNOW)
ZGAM_BM1 = GAMMA(1.5*XBM1+XALPHA_SNOW+1)
ZGAM_BM2 = GAMMA(1.5*XBM2+XALPHA_SNOW+1)
ZGAM_BM3 = GAMMA(1.5*XBM3+XALPHA_SNOW+1)
!
LSUBL_PIEKTUK = .TRUE. ! Compute sublimation according to PIEKTUK (Dery and Yau, 1999)
! Use mass-averaged settling velocity as ventilation
! velocity
! Save computational time compared to numerical
! integration of Carrier's or Mitchell's formulation
!
LSUBL_ALPINE3D = .FALSE. ! Compute sublimation using the method of reprsentative
! radius implemented in Alpine 3D (Groot and al, 2011)
! Air Temperature
ZT(:,:,:) = PTHT(:,:,:) * ( PPABST(:,:,:) / XP00 ) ** (XRD/XCPD)
!
!-------------------------------------------------------------------------------
!
!* 1. COMPUTE THE LOOP BOUNDS
! -----------------------
!
IIB=1+JPHEXT
IIE=SIZE(PZZ,1) - JPHEXT
IJB=1+JPHEXT
IJE=SIZE(PZZ,2) - JPHEXT
IKB=1+JPVEXT
IKE=SIZE(PZZ,3) - JPVEXT
!
!
!-------------------------------------------------------------------------------
!
!* 2. COMPUTE THE BLOWINGG SNOW SUBLIMATION
!
! Optimization by looking for locations where
! the blowing snow fields are larger than a minimal value only !!!
!
! compute parameters of the snow particle distribution
!
CALL PPP2SNOW(PSVT, PRHODREF, PBET3D=ZBETA)
!
GSUBL(:,:,:) = .FALSE.
GSUBL(IIB:IIE,IJB:IJE,IKB:IKE) = &
PSVT(IIB:IIE,IJB:IJE,IKB:IKE,1)>10 .AND. &
PSVT(IIB:IIE,IJB:IJE,IKB:IKE,2)>1e-20
!GSUBL(IIB:IIE,IJB:IJE,IKB:IKE) = &
! PSVT(IIB:IIE,IJB:IJE,IKB:IKE,1)>0. .OR. &
! PSVT(IIB:IIE,IJB:IJE,IKB:IKE,2)>0.
IMICRO = COUNTJV( GSUBL(:,:,:),I1(:),I2(:),I3(:))
IF( IMICRO >= 0 ) THEN
ALLOCATE(ZRVT(IMICRO))
ALLOCATE(ZRCT(IMICRO))
ALLOCATE(ZRRT(IMICRO))
ALLOCATE(ZRIT(IMICRO))
ALLOCATE(ZRST(IMICRO))
ALLOCATE(ZRGT(IMICRO))
ALLOCATE(ZRVS(IMICRO))
ALLOCATE(ZSVT(IMICRO, NBLOWSNOW3D ))
ALLOCATE(ZSVS(IMICRO, NBLOWSNOW3D ))
ALLOCATE(ZTHS(IMICRO))
ALLOCATE(ZZT(IMICRO))
ALLOCATE(ZRHODREF(IMICRO))
ALLOCATE(ZPRES(IMICRO))
ALLOCATE(ZZBETA(IMICRO))
ALLOCATE(ZEXNREF(IMICRO))
ALLOCATE(ZZZ(IMICRO))
ALLOCATE(ZVGK(IMICRO))
ALLOCATE(ZSNWSUBL(IMICRO))
DO JL=1,IMICRO
ZRVT(JL) = PRVT(I1(JL),I2(JL),I3(JL))
ZRCT(JL) = PRCT(I1(JL),I2(JL),I3(JL))
ZRRT(JL) = PRRT(I1(JL),I2(JL),I3(JL))
ZRIT(JL) = PRIT(I1(JL),I2(JL),I3(JL))
ZRST(JL) = PRST(I1(JL),I2(JL),I3(JL))
ZRGT(JL) = PRGT(I1(JL),I2(JL),I3(JL))
ZRVS(JL) = PRVS(I1(JL),I2(JL),I3(JL))
ZSVT(JL,:) = PSVT(I1(JL),I2(JL),I3(JL),:)
ZSVS(JL,:) = PSVS(I1(JL),I2(JL),I3(JL),:)
ZTHS(JL) = PTHS(I1(JL),I2(JL),I3(JL))
ZZT(JL) = ZT(I1(JL),I2(JL),I3(JL))
ZRHODREF(JL) = PRHODREF(I1(JL),I2(JL),I3(JL))
ZPRES(JL) = PPABST(I1(JL),I2(JL),I3(JL))
ZZBETA(JL) = ZBETA(I1(JL),I2(JL),I3(JL))
ZEXNREF(JL) = PEXNREF(I1(JL),I2(JL),I3(JL))
ZZZ(JL) = PZZ(I1(JL),I2(JL),I3(JL))
ZVGK(JL) = PVGK(I1(JL),I2(JL),I3(JL))
ZSNWSUBL(JL) = PSNWSUBL3D(I1(JL),I2(JL),I3(JL))
END DO
ALLOCATE(ZZW(IMICRO))
ALLOCATE(ZUSI(IMICRO))
ZZW(:) = EXP( XALPI - XBETAI/ZZT(:) - XGAMI*ALOG(ZZT(:) ) )
ZUSI(:) = ZRVT(:)*( ZPRES(:)-ZZW(:) ) / ( (XMV/XMD) * ZZW(:) ) - 1.0
! Undersaturation over ice
ALLOCATE(ZLSFACT(IMICRO))
ZZW(:) = ZEXNREF(:)*( XCPD+XCPV*ZRVT(:)+XCL*(ZRCT(:)+ZRRT(:)) &
+XCI*(ZRIT(:)+ZRST(:)+ZRGT(:)) )
ZLSFACT(:) = (XLSTT+(XCPV-XCI)*(ZZT(:)-XTT))/ZZW(:) ! L_s/(Pi_ref*C_ph)
ALLOCATE(ZKA(IMICRO))
ALLOCATE(ZDV(IMICRO))
ALLOCATE(ZMU(IMICRO))
ALLOCATE(ZAI(IMICRO))
ALLOCATE(ZAA(IMICRO))
ALLOCATE(ZBB(IMICRO))
ALLOCATE(ZR1(IMICRO))
ALLOCATE(ZR2(IMICRO))
ALLOCATE(ZAM1(IMICRO))
ALLOCATE(ZAM2(IMICRO))
ALLOCATE(ZAM3(IMICRO))
ALLOCATE(NMAX(IMICRO))
CALL SNOW_SUBL
ZW(:,:,:) = PRVS(:,:,:)
PRVS(:,:,:) = UNPACK( ZRVS(:),MASK=GSUBL(:,:,:),FIELD=ZW(:,:,:) )
ZW(:,:,:) = PTHS(:,:,:)
PTHS(:,:,:) = UNPACK( ZTHS(:),MASK=GSUBL(:,:,:),FIELD=ZW(:,:,:) )
ZW(:,:,:) = PSVS(:,:,:,1)
PSVS(:,:,:,1) = UNPACK( ZSVS(:,1),MASK=GSUBL(:,:,:),FIELD=ZW(:,:,:) )
ZW(:,:,:) = PSVS(:,:,:,2)
PSVS(:,:,:,2) = UNPACK( ZSVS(:,2),MASK=GSUBL(:,:,:),FIELD=ZW(:,:,:) )
! ZW(:,:,:) = PSVS(:,:,:,3)
! PSVS(:,:,:,3) = UNPACK( ZSVS(:,3),MASK=GSUBL(:,:,:),FIELD=ZW(:,:,:) )
ZW(:,:,:) = PSNWSUBL3D(:,:,:)
PSNWSUBL3D(:,:,:) = UNPACK( ZSNWSUBL(:),MASK=GSUBL(:,:,:),FIELD=ZW(:,:,:) )
DEALLOCATE(ZRVT)
DEALLOCATE(ZRCT)
DEALLOCATE(ZRRT)
DEALLOCATE(ZRIT)
DEALLOCATE(ZRST)
DEALLOCATE(ZRGT)
DEALLOCATE(ZRVS)
DEALLOCATE(ZSVT)
DEALLOCATE(ZSVS)
DEALLOCATE(ZTHS)
DEALLOCATE(ZZT)
DEALLOCATE(ZRHODREF)
DEALLOCATE(ZPRES)
DEALLOCATE(ZKA)
DEALLOCATE(ZDV)
DEALLOCATE(ZUSI)
DEALLOCATE(ZZW)
DEALLOCATE(ZAI)
DEALLOCATE(ZAA)
DEALLOCATE(ZBB)
DEALLOCATE(ZR1)
DEALLOCATE(ZR2)
DEALLOCATE(ZAM1)
DEALLOCATE(ZAM2)
DEALLOCATE(ZAM3)
DEALLOCATE(ZZBETA)
DEALLOCATE(NMAX)
DEALLOCATE(ZEXNREF)
DEALLOCATE(ZLSFACT)
DEALLOCATE(ZZZ)
DEALLOCATE(ZMU)
DEALLOCATE(ZSNWSUBL)
DEALLOCATE(ZVGK)
END IF
!
!-------------------------------------------------------------------------------
!
!-------------------------------------------------------------------------------
!
!
CONTAINS
!
!-------------------------------------------------------------------------------
!
SUBROUTINE SNOW_SUBL
IMPLICIT NONE
! Sutherland's equation for kinematic viscosity
ZMU(:)=1.8325d-5*416.16/(ZZT(:)+120)*(ZZT(:)/296.16)*SQRT(ZZT(:)/296.16)/ZRHODREF(:)
! Thermal conductivity of the air
ZKA(:) = 2.38E-2 + 0.0071E-2 * ( ZZT(:) - XTT ) ! k_a
! Diffusivity of water vapor in the air.
ZDV(:) = 0.211E-4 * (ZZT(:)/XTT)**1.94 * (XP00/ZPRES(:)) ! D_v
!
!* Compute the denominator in the Thorpe and Masson (66) equation
!
ZAI(:) = EXP( XALPI - XBETAI/ZZT(:) - XGAMI*ALOG(ZZT(:) ) ) ! es_i
ZAI(:) = ( XLSTT + (XCPV-XCI)*(ZZT(:)-XTT) ) / (ZKA(:)*ZZT(:)) &
*( ( XLSTT + (XCPV-XCI)*(ZZT(:)-XTT) ) / (XRV*ZZT(:)) - 1.) &
+ (XRV*ZZT(:)) / (ZDV(:)*ZAI(:))
IF(LSUBL_ALPINE3D) THEN
ZR_EFF = 73.5e-6 ! Effective radisus computed following the Swiss
! method. This effective radius give the same total
! sublimation for a equal concentration an ensemble of
! gamma distributed particles with rm = 35e-6 m and
! alpha=3
! Compute coefficient for settling velocity following Carrier (1953)
ZAA(:) = 6.203*ZMU(:)/2.
ZBB(:) = 5.516*XRHOLI/(4.*ZRHODREF(:))*XG
DO JL=1,IMICRO
ZSUM_SUBL = 0.
ZUSI(JL) = MIN(ZUSI(JL), 0.) !Only the undersaturation over ice is considered.
! Ventilation velocity taken as settling velocity of particle of mean
! radius
ZVEL_VENT = - ZAA(JL)/ZR_EFF+((ZAA(JL)/ZR_EFF)**2+ZBB(JL)*ZR_EFF)**0.5
! Nusselt Number
ZNU = NUSSELT(ZR_EFF,ZMU(JL),ZVEL_VENT)
! Rate of change of mass for a subliming ice sphere of radius ZR_EFF
ZMASS = 2*XPI*ZR_EFF*ZNU*ZUSI(JL)/ZAI(JL)
! Integration over the radius spectrum
ZSUM_SUBL = ZMASS*ZSVT(JL,2)/(4./3.*XPI*XRHOLI*ZR_EFF**2)
ZSUM_SUBL = MIN( ZRVS(JL),ZSUM_SUBL)*(0.5+SIGN(0.5,ZSUM_SUBL)) &
- MIN(ZSVS(JL,2),ABS(ZSUM_SUBL))*(0.5-SIGN(0.5,ZSUM_SUBL))
ZSUM_SUBL=MIN(0.,ZSUM_SUBL) ! Sink of snow
! Change in concentration rate Sn = Sb*N/qb (Dery and Yau,2000)
ZNUM = ZSUM_SUBL*ZSVT(JL,1)/ZSVT(JL,2)
! Change in mobility index : value mob*M3 is reduced according to reduction of
! M3 due to sublimation so that mob is constant due to sublimation
! ZMOB = ZSUM_SUBL*ZSVT(JL,3)/ZSVT(JL,2)
! Update tendencies for snow particles, water vapour and potential temperature
ZSVS(JL,2) = ZSVS(JL,2) + ZSUM_SUBL ! Particle mixing ratio
ZSVS(JL,1) = ZSVS(JL,1) + ZNUM ! Particles number
! ZSVS(JL,3) = ZSVS(JL,3) + ZMOB
ZRVS(JL) = ZRVS(JL) - ZSUM_SUBL ! Water vapour
ZTHS(JL) = ZTHS(JL) + ZSUM_SUBL*ZLSFACT(JL) ! Potential temperature
ZSNWSUBL(JL) = ZSNWSUBL(JL)+ZSUM_SUBL*ZRHODREF(JL) ! Sublimation rate kg/m3/s
END DO
ELSE IF(LSUBL_PIEKTUK) THEN
DO JL=1,IMICRO
ZSUM_SUBL=0.
ZUSI(JL) = MIN(ZUSI(JL), 0.) !Only the undersaturation over ice is considered.
! Ventilation velocity as mass averaged settling velocity
ZVEL_VENT = ZVGK(JL)
! Nusselt Number using mean radius of particle size distribution
ZNU = NUSSELT(XALPHA_SNOW*ZZBETA(JL),ZMU(JL),ZVEL_VENT)
! mass averaged sublimation rate follows Dery and Yan (1999) and avoids
! numerical integration over the particle spectrum
ZSUM_SUBL = ZSVT(JL,2)*ZNU*ZUSI(JL)/ &
(ZAI(JL)*2*XRHOLI*(XALPHA_SNOW*ZZBETA(JL))**2)
! Restriction of ZSUM_SUBL
ZTEMP=ZSUM_SUBL
ZSUM_SUBL = MIN( ZRVS(JL),ZSUM_SUBL)*(0.5+SIGN(0.5,ZSUM_SUBL)) &
- MIN(ZSVS(JL,2),ABS(ZSUM_SUBL))*(0.5-SIGN(0.5,ZSUM_SUBL))
ZSUM_SUBL=MIN(0.,ZSUM_SUBL) ! Sink of snow
IF(ZSUM_SUBL>0) THEN
write(*,*) 'Warning Subl',JL,'Subl',ZSUM_SUBL,'TEMP',ZTEMP
write(*,*) 'Warning Subl ZSVT',ZSVT(JL,1),ZSVT(JL,2)
write(*,*) 'Warning vap',ZRVS(JL),'ZSVs',ZSVS(JL,2)
END IF
! Change in concentration rate Sn = Sb*N/qb (Dery and Yau,2000)
ZNUM = ZSUM_SUBL*ZSVT(JL,1)/ZSVT(JL,2)
! Change in mobility index : value mob*M3 is reduced according to reduction of
! M3 due to sublimation so that mob is constant due to sublimation
! ZMOB = ZSUM_SUBL*ZSVT(JL,3)/ZSVT(JL,2)
! Update tendencies for snow particles, water vapour and potential temperature
ZSVS(JL,2) = ZSVS(JL,2) + ZSUM_SUBL ! Particle mixing ratio
ZSVS(JL,1) = ZSVS(JL,1) + ZNUM ! Particles number
! ZSVS(JL,3) = ZSVS(JL,3) + ZMOB
ZRVS(JL) = ZRVS(JL) - ZSUM_SUBL ! Water vapour
ZTHS(JL) = ZTHS(JL) + ZSUM_SUBL*ZLSFACT(JL) ! Potential temperature
ZSNWSUBL(JL) = ZSNWSUBL(JL)+ZSUM_SUBL*ZRHODREF(JL) ! Sublimation rate kg/m3/s
END DO
ELSE
!
!* Compute the constants in Carrier equation
!
IF(CSNOWSEDIM=='CARR') THEN
ZAA(:) = 6.203*ZMU(:)/2.
ZBB(:) = 5.516*XRHOLI/(4.*ZRHODREF(:))*XG
NMAX=GET_INDEX(ZZBETA(:),ZDELTAR)
DO JL=1,IMICRO
ZSUM_SUBL=0.
ZUSI(JL) = MIN(ZUSI(JL), 0.) !Only the undersaturation over ice is considered.
DO JN=1,NMAX(JL)
ZR = 1E-6+(JN-0.5)*ZDELTAR
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! Carrier settling velocity
ZVEL_CARRIER = - ZAA(JL)/ZR+((ZAA(JL)/ZR)**2+ZBB(JL)*ZR)**0.5
! Weight of the corresponding bin following the gamma distribution
ZW_M0=ZSVT(JL,1)*ZR**(XALPHA_SNOW-1)*exp(-ZR/ZZBETA(JL))/(ZZBETA(JL))**XALPHA_SNOW*ZGAM
! Ventilation velocity as a sum of settling velocity and relative
! turbulent velocity fluctuations
ZVEL_VENT = ZVEL_CARRIER!+TURB_FLUC(ZR,ZMU(JL),ZVEL_CARRIER,ZRHODREF(JL), &
! ZZZ(JL),ZVMOD(JL))
! Nusselt Number
ZNU = NUSSELT(ZR,ZMU(JL),ZVEL_VENT)
! Rate of change of mass for a subliming ice sphere
ZMASS = 2*XPI*ZR*ZNU*ZUSI(JL)/ZAI(JL)
! Integration over the radius spectrum
ZSUM_SUBL = ZSUM_SUBL+ZW_M0*ZMASS*ZDELTAR
END DO
! Restriction of ZSUM_SUBL
ZSUM_SUBL = MIN( ZRVS(JL),ZSUM_SUBL)*(0.5+SIGN(0.5,ZSUM_SUBL)) &
- MIN( ZSVS(JL,2),ABS(ZSUM_SUBL) )*(0.5-SIGN(0.5,ZSUM_SUBL))
! Change in concentration rate Sn = Sb*N/qb (Dery and Yau,2000)
ZNUM = ZSUM_SUBL*ZSVT(JL,1)/ZSVT(JL,2)
! Change in mobility index : value mob*M3 is reduced according to reduction of
! M3 due to sublimation so that mob is constant due to sublimation
! ZMOB = ZSUM_SUBL*ZSVT(JL,3)/ZSVT(JL,2)
! Update tendencies for snow particles, water vapour and potential temperature
ZSVS(JL,2) = ZSVS(JL,2) + ZSUM_SUBL ! Particle mixing ratio
ZSVS(JL,1) = ZSVS(JL,1) + ZNUM ! Particles number
! ZSVS(JL,3) = ZSVS(JL,3) + ZMOB
ZRVS(JL) = ZRVS(JL) - ZSUM_SUBL ! Water vapour
ZTHS(JL) = ZTHS(JL) + ZSUM_SUBL*ZLSFACT(JL) ! Potential temperature
ZSNWSUBL(JL) = ZSUM_SUBL*ZRHODREF(JL) ! Sublimation rate kg/m3/s
END DO
END IF
IF(CSNOWSEDIM=='MITC') THEN
LNONEFFICIENT = .FALSE.
! write(*,*) 'MITC'
! Compute limit radius for integration of Mitchell's formulation
ZR1(:)=RLIM(ZMU,ZRHODREF,XBESTL_1)
ZR2(:)=RLIM(ZMU,ZRHODREF,XBESTL_2)
! Compute parameter avr for integration of Mitchell's formulation
ZAM1(:)=AVR(XAM1,XBM1,ZRHODREF,ZMU)
ZAM2(:)=AVR(XAM2,XBM2,ZRHODREF,ZMU)
ZAM3(:)=AVR(XAM3,XBM3,ZRHODREF,ZMU)
DO JL=1,IMICRO
ZUSI(JL) = MIN(ZUSI(JL), 0.) !Only the undersaturation over ice is considered.
! no water deposition on blown snow particles
IF(LNONEFFICIENT) THEN
ZSUM_SUBL = 2*XPI*ZUSI(JL)*ZSVT(JL,1)/ZAI(JL)*(XANU*ZZBETA(JL)*XALPHA_SNOW + &
XBNU/ZGAM*(2/ZMU(JL))**0.5*( &
ZZBETA(JL)**(1.5*XBM1+1)*ZAM1(JL)**0.5*ZGAM_BM1* &
GAMMA_INC(1.5*XBM1+XALPHA_SNOW+1,ZR1(JL)/ZZBETA(JL)) + &
ZZBETA(JL)**(1.5*XBM2+1)*ZAM2(JL)**0.5*ZGAM_BM2* &
(GAMMA_INC(1.5*XBM2+XALPHA_SNOW+1,ZR2(JL)/ZZBETA(JL))- &
GAMMA_INC(1.5*XBM2+XALPHA_SNOW+1,ZR1(JL)/ZZBETA(JL)))+ &
ZZBETA(JL)**(1.5*XBM3+1)*ZAM3(JL)**0.5*ZGAM_BM3* &
(1.-GAMMA_INC(1.5*XBM3+XALPHA_SNOW+1,ZR2(JL)/ZZBETA(JL)))))
ELSE
ZSUM_SUBL = 2*XPI*ZUSI(JL)*ZSVT(JL,1)/ZAI(JL)*(XANU*ZZBETA(JL)*XALPHA_SNOW + &
XBNU/ZGAM*(2/ZMU(JL))**0.5*( &
ZZBETA(JL)**(1.5*XBM1+1)*ZAM1(JL)**0.5* &
GAMMA_INC_LOW(1.5*XBM1+XALPHA_SNOW+1,ZR1(JL)/ZZBETA(JL)) + &
ZZBETA(JL)**(1.5*XBM2+1)*ZAM2(JL)**0.5* &
(GAMMA_INC_LOW(1.5*XBM2+XALPHA_SNOW+1,ZR2(JL)/ZZBETA(JL))- &
GAMMA_INC_LOW(1.5*XBM2+XALPHA_SNOW+1,ZR1(JL)/ZZBETA(JL)))+ &
ZZBETA(JL)**(1.5*XBM3+1)*ZAM3(JL)**0.5* &
(ZGAM_BM3-GAMMA_INC_LOW(1.5*XBM3+XALPHA_SNOW+1,ZR2(JL)/ZZBETA(JL)))))
END IF
! Restriction of ZSUM_SUBL
ZTEMP=ZSUM_SUBL
ZSUM_SUBL = MIN( ZRVS(JL),ZSUM_SUBL)*(0.5+SIGN(0.5,ZSUM_SUBL)) &
- MIN(ZSVS(JL,2),ABS(ZSUM_SUBL))*(0.5-SIGN(0.5,ZSUM_SUBL))
ZSUM_SUBL=MIN(0.,ZSUM_SUBL) ! Sink of snow
IF(ZSUM_SUBL>0) THEN
write(*,*) 'Warning Subl',JL,'Subl',ZSUM_SUBL,'TEMP',ZTEMP
write(*,*) 'Warning Subl ZSVT',ZSVT(JL,1),ZSVT(JL,2)
write(*,*) 'Warning vap',ZRVS(JL),'ZSVs',ZSVS(JL,2)
END IF
! Change in concentration rate Sn = Sb*N/qb (Dery and Yau,2000)
ZNUM = ZSUM_SUBL*ZSVT(JL,1)/ZSVT(JL,2)
! Change in mobility index : value mob*M3 is reduced according to reduction of
! M3 due to sublimation so that mob is constant due to sublimation
! ZMOB = ZSUM_SUBL*ZSVT(JL,3)/ZSVT(JL,2)
! Update tendencies for snow particles, water vapour and potential temperature
ZSVS(JL,2) = ZSVS(JL,2) + ZSUM_SUBL ! Particle mixing ratio
ZSVS(JL,1) = ZSVS(JL,1) + ZNUM ! Particles number
! ZSVS(JL,3) = ZSVS(JL,3) + ZMOB
ZRVS(JL) = ZRVS(JL) - ZSUM_SUBL ! Water vapour
ZTHS(JL) = ZTHS(JL) + ZSUM_SUBL*ZLSFACT(JL) ! Potential temperature
ZSNWSUBL(JL) = ZSUM_SUBL*ZRHODREF(JL) ! Sublimation rate kg/m3/s
END DO
END IF
END IF
END SUBROUTINE SNOW_SUBL
!
!-------------------------------------------------------------------------------
!
FUNCTION GET_INDEX(PBETA,PDELTAR) RESULT(KMAX)
!
!! PURPOSE
!! -------
! Calculate the upper index in numerical integration of Carrier's formulation
! Index equals to 5* mean radius
!
!
USE MODD_BLOWSNOW, ONLY : XALPHA_SNOW
!
IMPLICIT NONE
!
!* 0.1 declarations of arguments
!
REAL, INTENT(IN) :: PDELTAR ! (-)
REAL, DIMENSION(:), INTENT(IN) :: PBETA ! (kg/m3)
!
INTEGER, DIMENSION(SIZE(PBETA,1)) :: KMAX ! (-)
!
KMAX(:)=int(PBETA(:)*XALPHA_SNOW*5/PDELTAR)
END FUNCTION GET_INDEX
!
!-------------------------------------------------------------------------------
!
FUNCTION RLIM(PMU,PRHODREF,PBEST_LIM) RESULT(PRLIM)
!
!! PURPOSE
!! -------
! Calculate the radius of a sperical particle for a given Best Number
!
!
USE MODD_CSTS_BLOWSNOW, ONLY : XRHOLI,XG
!
IMPLICIT NONE
!
!* 0.1 declarations of arguments
!
REAL, DIMENSION(:), INTENT(IN) :: PRHODREF ! (kg/m3)
REAL, DIMENSION(:), INTENT(IN) :: PMU ! (m2/s)
REAL, INTENT(IN) :: PBEST_LIM! (-)
!
REAL, DIMENSION(SIZE(PMU,1)) :: PRLIM ! (m)
!
PRLIM(:)=(3./32.*PRHODREF(:)/(XRHOLI*XG)*PMU(:)**2.*PBEST_LIM)**0.333333333
END FUNCTION RLIM
FUNCTION AVR(PARE,PBRE,PRHODREF,PMU) RESULT(PAVR)
!
!! PURPOSE
!! -------
! Calculate the parameter av_r in KC02 formulation (Eq. 3.1)
!
!
USE MODD_CSTS_BLOWSNOW, ONLY : XRHOLI,XG
!
IMPLICIT NONE
!
!* 0.1 declarations of arguments
!
REAL, INTENT(IN) :: PARE ! (-)
REAL, INTENT(IN) :: PBRE ! (-)
REAL, DIMENSION(:), INTENT(IN) :: PRHODREF ! (kg/m3)
REAL, DIMENSION(:), INTENT(IN) :: PMU ! (m2/s)
!
REAL, DIMENSION(SIZE(PMU,1)) :: PAVR ! (-)
!
PAVR(:)=2.**(3.*PBRE-1.)*PARE*PMU(:)**(1.-2.*PBRE)*(4./3.*XRHOLI/PRHODREF(:)*XG)**PBRE
END FUNCTION AVR
!
!-------------------------------------------------------------------------------
!
FUNCTION TURB_FLUC(PR,PMU,PCARRIER,PRHODREF,PZZ,PVMOD) RESULT(PSIG)
!
!! PURPOSE
!! -------
! Calculate the relative turbulent velocity fluctuations for a given radius.
! Used to compute the ventilation velocity.
! Formulation based on Dover (1993)
!
USE MODD_CSTS
!
IMPLICIT NONE
!
!* 0.1 declarations of arguments
!
REAL, INTENT(IN) :: PR ! (m)
REAL, INTENT(IN) :: PMU ! (m2/s)
REAL, INTENT(IN) :: PCARRIER ! (m/s)
REAL, INTENT(IN) :: PRHODREF ! (kg/m3)
REAL, INTENT(IN) :: PZZ ! (m)
REAL, INTENT(IN) :: PVMOD ! (m/s)
!
REAL :: PSIG ! (m/s)
!
!
!* 0.2 declaration of local variables
!
REAL :: ZFCRI1,ZFCRI2,ZFCRI
REAL :: ZS0,ZSIGU,ZSIGV,ZSIGW,ZUSTAR
!
!
!* 1 Calculate critical frequency
!
ZFCRI1 = 9*PRHODREF*PMU/(4*XPI*PR**2*XRHOLI)
ZFCRI2 = 0.363*PRHODREF*PCARRIER/(XPI*PR*XRHOLI)
ZFCRI = MAX(ZFCRI1,ZFCRI2)
!
!* 2 Calculate variances of the horizontal and vertical velocity components
!
ZS0 = ZFCRI*PZZ/PVMOD
ZSIGU = 4.77 *ZUSTAR**2/ (1+33*ZS0)**0.66666
ZSIGV = 2.76 *ZUSTAR**2/ (1+9.5*ZS0)**0.66666
ZSIGW = 1.31 *ZUSTAR**2/ (1+3.12*ZS0)**0.66666
PSIG = (ZSIGU+ZSIGV+ZSIGW)**0.5
END FUNCTION TURB_FLUC
!
FUNCTION NUSSELT(PR,PMU,PVEL_VENT) RESULT(PNU)
!
!! PURPOSE
!! -------
! Calculate the Nusselt number for a given particle radius
! Formulation based on Lee (1975)
!
!
IMPLICIT NONE
!
!* 0.1 declarations of arguments
!
REAL, INTENT(IN) :: PR ! (m)
REAL, INTENT(IN) :: PMU ! (m2/s)
REAL, INTENT(IN) :: PVEL_VENT ! (m/s)
!
REAL :: PNU ! (m/s)
!
!
!* 0.2 declaration of local variables
!
REAL :: ZRE
!
!
!* 1 Calculate Reynolds number
!
ZRE = 2*PR*PVEL_VENT/(PMU)
!
!* 2 Calculate Nusselt number
!
IF(ZRE<10) THEN
PNU = 1.79+0.606*ZRE**0.5
ELSE
PNU = 1.88+0.580*ZRE**0.5
END IF
END FUNCTION NUSSELT
!
!-------------------------------------------------------------------------------
!
END SUBROUTINE SUBL_BLOWSNOW