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SUBROUTINE SWCLR &
&( KIDIA , KFDIA , KLON , KLEV , KAER , KNU &
&, PAER , PALBP , PDSIG , PRAYL , PSEC &
&, PCGAZ , PPIZAZ, PRAY1 , PRAY2 , PREFZ , PRJ &
&, PRK , PRMU0 , PTAUAZ, PTRA1 , PTRA2 , PTRCLR &
!++MODIF_MESONH
&, ODUST,PPIZA_DST, PCGA_DST, PTAUREL_DST )
!--MODIF_MESONH
!**** *SWCLR* - CLEAR-SKY COLUMN COMPUTATIONS
! PURPOSE.
! --------
! COMPUTES THE REFLECTIVITY AND TRANSMISSIVITY IN CASE OF
! CLEAR-SKY COLUMN
!** INTERFACE.
! ----------
! *SWCLR* IS CALLED EITHER FROM *SW1S*
! OR FROM *SWNI*
! IMPLICIT ARGUMENTS :
! --------------------
! ==== INPUTS ===
! ==== OUTPUTS ===
! METHOD.
! -------
! EXTERNALS.
! ----------
! NONE
! REFERENCE.
! ----------
! SEE RADIATION'S PART OF THE ECMWF RESEARCH DEPARTMENT
! DOCUMENTATION, AND FOUQUART AND BONNEL (1980)
! AUTHOR.
! -------
! JEAN-JACQUES MORCRETTE *ECMWF*
! MODIFICATIONS.
! --------------
! ORIGINAL : 94-11-15
! Modified : 96-03-19 JJM-PhD (loop 107 in absence of aerosols)
! JJMorcrette 990128 : sunshine duration
! JJMorcrette 990128 : sunshine duration
! 99-05-25 JJMorcrette Revised aerosols
! JJMorcrette 001218 : 6 spectral intervals
! D.St Martin 11/2015 : bug on ZFACOA for NOVLP>= 5
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! ------------------------------------------------------------------
#include "tsmbkind.h"
USE YOESW , ONLY : RTAUA ,RPIZA ,RCGA
USE YOERAD , ONLY : NOVLP ,NSW
USE YOERDI , ONLY : REPCLC
USE YOERDU , ONLY : REPSCT
IMPLICIT NONE
! DUMMY INTEGER SCALARS
INTEGER_M :: KAER
INTEGER_M :: KFDIA
INTEGER_M :: KIDIA
INTEGER_M :: KLEV
INTEGER_M :: KLON
INTEGER_M :: KNU
! ------------------------------------------------------------------
!* 0.1 ARGUMENTS
! ---------
REAL_B :: PAER(KLON,6,KLEV), PALBP(KLON,NSW)&
&, PDSIG(KLON,KLEV)&
&, PRAYL(KLON)&
&, PSEC(KLON)
REAL_B ::&
&PCGAZ(KLON,KLEV) &
&, PPIZAZ(KLON,KLEV)&
&, PRAY1(KLON,KLEV+1) , PRAY2(KLON,KLEV+1)&
&, PREFZ(KLON,2,KLEV+1), PRJ(KLON,6,KLEV+1)&
&, PRK(KLON,6,KLEV+1) , PRMU0(KLON,KLEV+1)&
&, PTAUAZ(KLON,KLEV)&
&, PTRA1(KLON,KLEV+1) , PTRA2(KLON,KLEV+1)&
&, PTRCLR(KLON)
!
!++MODIF_MESONH
LOGICAL :: ODUST ! flag for DUST
REAL_B :: PPIZA_DST(KLON,KLEV) !ssa dust for current wavelength
REAL_B :: PCGA_DST(KLON,KLEV) !assym.fact dust for current wavelength
REAL_B :: PTAUREL_DST(KLON,KLEV) !tau/tau_{550} for current wavelength
!--MODIF_MESONH
! ------------------------------------------------------------------
!* 0.2 LOCAL ARRAYS
! ------------
REAL_B :: ZC0I(KLON,KLEV+1)&
&, ZCLE0(KLON,KLEV), ZCLEAR(KLON) &
&, ZR21(KLON)&
&, ZR23(KLON) , ZSS0(KLON) , ZSCAT(KLON)&
&, ZTR(KLON,2,KLEV+1)
! LOCAL INTEGER SCALARS
INTEGER_M :: IKL, JA, JAE, JAJ, JK, JKL, JKLP1, JKM1, JL, INU1
! LOCAL REAL SCALARS
REAL_B :: ZBMU0, ZBMU1, ZCORAE, ZDEN, ZDEN1, ZFACOA,&
&ZFF, ZGAP, ZGAR, ZMU1, ZMUE, ZRATIO, ZRE11, &
&ZTO, ZTRAY, ZWW
!++MODIF_MESONH
REAL_B ::ZFACOA_NEW(KLON,KLEV)
!--MODIF_MESONH
! ------------------------------------------------------------------
!* 1. OPTICAL PARAMETERS FOR AEROSOLS AND RAYLEIGH
! --------------------------------------------
ZFACOA_NEW(:,:)=0.0
DO JK = 1 , KLEV+1
DO JA = 1 , 6
DO JL = KIDIA,KFDIA
PRJ(JL,JA,JK) = _ZERO_
PRK(JL,JA,JK) = _ZERO_
ENDDO
ENDDO
ENDDO
! ------ NB: 'PAER' AEROSOLS ARE ENTERED FROM TOP TO BOTTOM
DO JK = 1 , KLEV
IKL=KLEV+1-JK
DO JL = KIDIA,KFDIA
PCGAZ(JL,JK) = _ZERO_
PPIZAZ(JL,JK) = _ZERO_
PTAUAZ(JL,JK) = _ZERO_
ENDDO
!++MODIF_MESONH
IF(NOVLP.LT.5)THEN !ECMWF VERSION
DO JAE=1,6
DO JL = KIDIA,KFDIA
PTAUAZ(JL,JK)=PTAUAZ(JL,JK)+PAER(JL, JAE, IKL)*RTAUA(KNU,JAE)
PPIZAZ(JL,JK)=PPIZAZ(JL,JK)+PAER(JL, JAE, IKL)&
&* RTAUA(KNU,JAE)*RPIZA(KNU,JAE)
PCGAZ(JL,JK) = PCGAZ(JL,JK) +PAER(JL, JAE, IKL)&
&* RTAUA(KNU,JAE)*RPIZA(KNU,JAE)*RCGA(KNU,JAE)
ENDDO
ENDDO
ELSE ! MESONH VERSION
DO JAE=1,6
DO JL = KIDIA,KFDIA
!Special optical properties for dust
IF (ODUST.AND.(JAE==3)) THEN
!Ponderation of aerosol optical properties:first step
!ti
PTAUAZ(JL,JK)=PTAUAZ(JL,JK) + PAER(JL,JAE,IKL) * PTAUREL_DST(JL,IKL)
!wi*ti
PPIZAZ(JL,JK)=PPIZAZ(JL,JK) + PAER(JL,JAE,IKL) &
*PTAUREL_DST(JL,IKL)*PPIZA_DST(JL,IKL)
!wi*ti*gi
PCGAZ(JL,JK) = PCGAZ(JL,JK) + PAER(JL,JAE,IKL) &
*PTAUREL_DST(JL,IKL)*PPIZA_DST(JL,IKL)*PCGA_DST(JL,IKL)
!wi*ti*(gi**2)
ZFACOA_NEW(JL,JK)= ZFACOA_NEW(JL,JK)+PAER(JL, JAE, IKL)&
&*PTAUREL_DST(JL,IKL) *PPIZA_DST(JL,IKL)*PCGA_DST(JL,IKL)*PCGA_DST(JL,IKL)
ELSE
!Ponderation of aerosol optical properties:first step
!ti
PTAUAZ(JL,JK)=PTAUAZ(JL,JK)+PAER(JL, JAE, IKL)*RTAUA(KNU,JAE)
!wi*ti
PPIZAZ(JL,JK)=PPIZAZ(JL,JK)+PAER(JL, JAE, IKL)&
&* RTAUA(KNU,JAE)*RPIZA(KNU,JAE)
!wi*ti*gi
PCGAZ(JL,JK) = PCGAZ(JL,JK) +PAER(JL, JAE, IKL)&
&* RTAUA(KNU,JAE)*RPIZA(KNU,JAE)*RCGA(KNU,JAE)
!wi*ti*(gi**2)
ZFACOA_NEW(JL,JK)= ZFACOA_NEW(JL,JK)+PAER(JL, JAE, IKL)&
&* RTAUA(KNU,JAE)*RPIZA(KNU,JAE)*RCGA(KNU,JAE)*RCGA(KNU,JAE)
ENDIF
ENDDO
ENDDO
ENDIF
!--MODIF_MESONH
!++MODIF_MESONH
IF (NOVLP.LT.5) then !ECMWF VERSION
DO JL = KIDIA,KFDIA
IF (KAER /= 0) THEN
PCGAZ(JL,JK)=PCGAZ(JL,JK)/PPIZAZ(JL,JK)
PPIZAZ(JL,JK)=PPIZAZ(JL,JK)/PTAUAZ(JL,JK)
ZTRAY = PRAYL(JL) * PDSIG(JL,JK)
ZRATIO = ZTRAY / (ZTRAY + PTAUAZ(JL,JK))
ZGAR = PCGAZ(JL,JK)
ZFF = ZGAR * ZGAR
PTAUAZ(JL,JK)=ZTRAY+PTAUAZ(JL,JK)*(_ONE_-PPIZAZ(JL,JK)*ZFF)
PCGAZ(JL,JK) = ZGAR * (_ONE_ - ZRATIO) / (_ONE_ + ZGAR)
PPIZAZ(JL,JK) =ZRATIO+(_ONE_-ZRATIO)*PPIZAZ(JL,JK)*(_ONE_-ZFF)&
&/ (_ONE_ - PPIZAZ(JL,JK) * ZFF)
ELSE
ZTRAY = PRAYL(JL) * PDSIG(JL,JK)
PTAUAZ(JL,JK) = ZTRAY
PCGAZ(JL,JK) = _ZERO_
PPIZAZ(JL,JK) = _ONE_-REPSCT
ENDIF
ENDDO
ELSE !MESONH VERSION
DO JL = KIDIA,KFDIA
IF (KAER /= 0) THEN
ZTRAY = PRAYL(JL) * PDSIG(JL,JK)
ZRATIO =PPIZAZ(JL,JK)+ZTRAY
!Ponderation G**2
ZFACOA_NEW(JL,JK)= ZFACOA_NEW(JL,JK)/ZRATIO
!Ponderation w
PPIZAZ(JL,JK)=ZRATIO/(PTAUAZ(JL,JK)+ZTRAY)
!Ponderation g
PCGAZ(JL,JK)=PCGAZ(JL,JK)/ZRATIO
!Ponderation+delta-modified parameters tau
PTAUAZ(JL,JK)=(ZTRAY+PTAUAZ(JL,JK))*&
(_ONE_-PPIZAZ(JL,JK)*ZFACOA_NEW(JL,JK))
!delta-modified parameters w
PPIZAZ(JL,JK)=PPIZAZ(JL,JK)*(1-ZFACOA_NEW(JL,JK))/&
(1-ZFACOA_NEW(JL,JK)*PPIZAZ(JL,JK))
!delta-modified parameters g
PCGAZ(JL,JK)=PCGAZ(JL,JK)/(1+PCGAZ(JL,JK))
ELSE
ZTRAY = PRAYL(JL) * PDSIG(JL,JK)
ZFACOA_NEW(JL,JK)=_ZERO_
PTAUAZ(JL,JK) = ZTRAY
PCGAZ(JL,JK) = _ZERO_
PPIZAZ(JL,JK) = _ONE_-REPSCT
ENDIF
ENDDO
ENDIF
!--MODIF_MESONH
ENDDO
! ------------------------------------------------------------------
!* 2. TOTAL EFFECTIVE CLOUDINESS ABOVE A GIVEN LEVEL
! ----------------------------------------------
DO JL = KIDIA,KFDIA
ZR23(JL) = _ZERO_
ZC0I(JL,KLEV+1) = _ZERO_
ZCLEAR(JL) = _ONE_
ZSCAT(JL) = _ZERO_
ENDDO
JK = 1
JKL = KLEV+1 - JK
JKLP1 = JKL + 1
DO JL = KIDIA,KFDIA
!++MODIF_MESONH
IF (NOVLP.GE.5) THEN
ZFACOA = PTAUAZ(JL,JKL)
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ZCORAE = ZFACOA * PSEC(JL)
ELSE
ZFACOA = _ONE_ - PPIZAZ(JL,JKL)*PCGAZ(JL,JKL)*PCGAZ(JL,JKL)
ZCORAE = ZFACOA * PTAUAZ(JL,JKL) * PSEC(JL)
ENDIF
!--MODIF_MESONH
ZR21(JL) = EXP(-ZCORAE )
ZSS0(JL) = _ONE_-ZR21(JL)
ZCLE0(JL,JKL) = ZSS0(JL)
!++MODIF_MESONH
IF (NOVLP == 1 .OR. NOVLP == 4) THEN
!--MODIF_MESONH
!* maximum-random
ZCLEAR(JL) = ZCLEAR(JL)&
&*(_ONE_-MAX(ZSS0(JL),ZSCAT(JL)))&
&/(_ONE_-MIN(ZSCAT(JL),_ONE_-REPCLC))
ZC0I(JL,JKL) = _ONE_ - ZCLEAR(JL)
ZSCAT(JL) = ZSS0(JL)
ELSEIF (NOVLP == 2) THEN
!* maximum
ZSCAT(JL) = MAX( ZSS0(JL) , ZSCAT(JL) )
ZC0I(JL,JKL) = ZSCAT(JL)
!++MODIF_MESONH
ELSEIF ((NOVLP == 3).OR.(NOVLP .ge. 5)) THEN
!--MODIF_MESONH
!* random
ZCLEAR(JL)=ZCLEAR(JL)*(_ONE_-ZSS0(JL))
ZSCAT(JL) = _ONE_ - ZCLEAR(JL)
ZC0I(JL,JKL) = ZSCAT(JL)
ENDIF
ENDDO
DO JK = 2 , KLEV
JKL = KLEV+1 - JK
JKLP1 = JKL + 1
DO JL = KIDIA,KFDIA
!++MODIF_MESONH
IF (NOVLP.GE.5) THEN
ZFACOA = PTAUAZ(JL,JKL)
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ZCORAE = ZFACOA * PSEC(JL)
ELSE
ZFACOA = _ONE_ - PPIZAZ(JL,JKL)*PCGAZ(JL,JKL)*PCGAZ(JL,JKL)
ZCORAE = ZFACOA * PTAUAZ(JL,JKL) * PSEC(JL)
ENDIF
!--MODIF_MESONH
ZR21(JL) = EXP(-ZCORAE )
ZSS0(JL) = _ONE_-ZR21(JL)
ZCLE0(JL,JKL) = ZSS0(JL)
IF (NOVLP == 1 .OR. NOVLP == 4) THEN
!* maximum-random
ZCLEAR(JL) = ZCLEAR(JL)&
&*(_ONE_-MAX(ZSS0(JL),ZSCAT(JL)))&
&/(_ONE_-MIN(ZSCAT(JL),_ONE_-REPCLC))
ZC0I(JL,JKL) = _ONE_ - ZCLEAR(JL)
ZSCAT(JL) = ZSS0(JL)
ELSEIF (NOVLP == 2) THEN
!* maximum
ZSCAT(JL) = MAX( ZSS0(JL) , ZSCAT(JL) )
ZC0I(JL,JKL) = ZSCAT(JL)
!++MODIF_MESONH
ELSEIF ((NOVLP == 3).OR.(NOVLP.ge.5)) THEN
!--MODIF_MESONH
!* random
ZCLEAR(JL)=ZCLEAR(JL)*(_ONE_-ZSS0(JL))
ZSCAT(JL) = _ONE_ - ZCLEAR(JL)
ZC0I(JL,JKL) = ZSCAT(JL)
ENDIF
ENDDO
ENDDO
! ------------------------------------------------------------------
!* 3. REFLECTIVITY/TRANSMISSIVITY FOR PURE SCATTERING
! -----------------------------------------------
DO JL = KIDIA,KFDIA
PRAY1(JL,KLEV+1) = _ZERO_
PRAY2(JL,KLEV+1) = _ZERO_
PREFZ(JL,2,1) = PALBP(JL,KNU)
PREFZ(JL,1,1) = PALBP(JL,KNU)
PTRA1(JL,KLEV+1) = _ONE_
PTRA2(JL,KLEV+1) = _ONE_
ENDDO
DO JK = 2 , KLEV+1
JKM1 = JK-1
DO JL = KIDIA,KFDIA
! ------------------------------------------------------------------
!* 3.1 EQUIVALENT ZENITH ANGLE
! -----------------------
ZMUE = (_ONE_-ZC0I(JL,JK)) * PSEC(JL)+ ZC0I(JL,JK) * 1.66_JPRB
PRMU0(JL,JK) = _ONE_/ZMUE
! ------------------------------------------------------------------
!* 3.2 REFLECT./TRANSMISSIVITY DUE TO RAYLEIGH AND AEROSOLS
! ----------------------------------------------------
ZGAP = PCGAZ(JL,JKM1)
ZBMU0 = _HALF_ - 0.75_JPRB * ZGAP / ZMUE
ZWW = PPIZAZ(JL,JKM1)
ZTO = PTAUAZ(JL,JKM1)
ZDEN = _ONE_ + (_ONE_ - ZWW + ZBMU0 * ZWW) * ZTO * ZMUE &
&+ (1-ZWW) * (_ONE_ - ZWW +_TWO_*ZBMU0*ZWW)*ZTO*ZTO*ZMUE*ZMUE
PRAY1(JL,JKM1) = ZBMU0 * ZWW * ZTO * ZMUE / ZDEN
PTRA1(JL,JKM1) = _ONE_ / ZDEN
ZMU1 = _HALF_
ZBMU1 = _HALF_ - 0.75_JPRB * ZGAP * ZMU1
ZDEN1= _ONE_ + (_ONE_ - ZWW + ZBMU1 * ZWW) * ZTO / ZMU1 &
&+ (1-ZWW) * (_ONE_ - ZWW +_TWO_*ZBMU1*ZWW)*ZTO*ZTO/ZMU1/ZMU1
PRAY2(JL,JKM1) = ZBMU1 * ZWW * ZTO / ZMU1 / ZDEN1
PTRA2(JL,JKM1) = _ONE_ / ZDEN1
PREFZ(JL,1,JK) = (PRAY1(JL,JKM1)&
&+ PREFZ(JL,1,JKM1) * PTRA1(JL,JKM1)&
&* PTRA2(JL,JKM1)&
&/ (_ONE_-PRAY2(JL,JKM1)*PREFZ(JL,1,JKM1)))
ZTR(JL,1,JKM1) = (PTRA1(JL,JKM1)&
&/ (_ONE_-PRAY2(JL,JKM1)*PREFZ(JL,1,JKM1)))
PREFZ(JL,2,JK) = (PRAY1(JL,JKM1)&
&+ PREFZ(JL,2,JKM1) * PTRA1(JL,JKM1)&
&* PTRA2(JL,JKM1) )
ZTR(JL,2,JKM1) = PTRA1(JL,JKM1)
ENDDO
ENDDO
DO JL = KIDIA,KFDIA
ZMUE = (_ONE_-ZC0I(JL,1))*PSEC(JL)+ZC0I(JL,1)*1.66_JPRB
PRMU0(JL,1)=_ONE_/ZMUE
PTRCLR(JL)=_ONE_-ZC0I(JL,1)
ENDDO
! ------------------------------------------------------------------
!* 3.5 REFLECT./TRANSMISSIVITY BETWEEN SURFACE AND LEVEL
! -------------------------------------------------
IF (NSW <= 4) THEN
INU1=1
ELSE IF (NSW == 6) THEN
INU1=3
END IF
IF (KNU <= INU1) THEN
JAJ = 2
DO JL = KIDIA,KFDIA
PRJ(JL,JAJ,KLEV+1) = _ONE_
PRK(JL,JAJ,KLEV+1) = PREFZ(JL, 1,KLEV+1)
ENDDO
DO JK = 1 , KLEV
JKL = KLEV+1 - JK
JKLP1 = JKL + 1
DO JL = KIDIA,KFDIA
ZRE11= PRJ(JL,JAJ,JKLP1) * ZTR(JL, 1,JKL)
PRJ(JL,JAJ,JKL) = ZRE11
PRK(JL,JAJ,JKL) = ZRE11 * PREFZ(JL, 1,JKL)
ENDDO
ENDDO
ELSE
DO JAJ = 1 , 2
DO JL = KIDIA,KFDIA
PRJ(JL,JAJ,KLEV+1) = _ONE_
PRK(JL,JAJ,KLEV+1) = PREFZ(JL,JAJ,KLEV+1)
ENDDO
DO JK = 1 , KLEV
JKL = KLEV+1 - JK
JKLP1 = JKL + 1
DO JL = KIDIA,KFDIA
ZRE11= PRJ(JL,JAJ,JKLP1) * ZTR(JL,JAJ,JKL)
PRJ(JL,JAJ,JKL) = ZRE11
PRK(JL,JAJ,JKL) = ZRE11 * PREFZ(JL,JAJ,JKL)
ENDDO
ENDDO
ENDDO
ENDIF
! ------------------------------------------------------------------
RETURN
END SUBROUTINE SWCLR