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, & !++MODIFCODE & LDDUST,PPIZA_DST, PCGA_DST, PTAU_DST ) !--MODIFCODE !**** *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 ! 03-10-10 Deborah Salmond and Marta Janiskova Optimisation ! M.Hamrud 01-Oct-2003 CY28 Cleaning ! A.Grini (Meteo-France: 2005-11-10) ! Y.Seity 05-10-10 : add add 3 optional arg. for dust SW properties ! Y.Seity 06-09-09 : add modset from O.Thouron (MesoNH) under NOVLP tests ! O.Boucher fev.2014: modification sur les aerosols pour utiliser les variables DST ! ------------------------------------------------------------------ USE PARKIND1 ,ONLY : JPIM ,JPRB USE YOMHOOK ,ONLY : LHOOK, DR_HOOK USE YOESW , ONLY : RTAUA ,RPIZA ,RCGA !USE YOERAD , ONLY : NOVLP ,NSW ! NSW mis dans .def MPL 20140211 USE YOERAD , ONLY : NOVLP USE YOERDI , ONLY : REPCLC USE YOERDU , ONLY : REPSCT IMPLICIT NONE INCLUDE "clesphys.h" INTEGER(KIND=JPIM),INTENT(IN) :: KLON INTEGER(KIND=JPIM),INTENT(IN) :: KLEV INTEGER(KIND=JPIM),INTENT(IN) :: KIDIA INTEGER(KIND=JPIM),INTENT(IN) :: KFDIA INTEGER(KIND=JPIM),INTENT(IN) :: KAER INTEGER(KIND=JPIM),INTENT(IN) :: KNU REAL(KIND=JPRB) ,INTENT(IN) :: PAER(KLON,6,KLEV) REAL(KIND=JPRB) ,INTENT(IN) :: PALBP(KLON,NSW) REAL(KIND=JPRB) ,INTENT(IN) :: PDSIG(KLON,KLEV) REAL(KIND=JPRB) ,INTENT(IN) :: PRAYL(KLON) REAL(KIND=JPRB) ,INTENT(IN) :: PSEC(KLON) !++MODIFCODE LOGICAL ,INTENT(IN) :: LDDUST ! flag for DUST REAL(KIND=JPRB) ,INTENT(IN) :: PPIZA_DST(KLON,KLEV) REAL(KIND=JPRB) ,INTENT(IN) :: PCGA_DST(KLON,KLEV) REAL(KIND=JPRB) ,INTENT(IN) :: PTAU_DST(KLON,KLEV) !--MODIFCODE REAL(KIND=JPRB) ,INTENT(OUT) :: PCGAZ(KLON,KLEV) REAL(KIND=JPRB) ,INTENT(OUT) :: PPIZAZ(KLON,KLEV) REAL(KIND=JPRB) ,INTENT(OUT) :: PRAY1(KLON,KLEV+1) REAL(KIND=JPRB) ,INTENT(OUT) :: PRAY2(KLON,KLEV+1) REAL(KIND=JPRB) ,INTENT(OUT) :: PREFZ(KLON,2,KLEV+1) REAL(KIND=JPRB) ,INTENT(OUT) :: PRJ(KLON,6,KLEV+1) REAL(KIND=JPRB) ,INTENT(OUT) :: PRK(KLON,6,KLEV+1) REAL(KIND=JPRB) ,INTENT(OUT) :: PRMU0(KLON,KLEV+1) REAL(KIND=JPRB) ,INTENT(OUT) :: PTAUAZ(KLON,KLEV) REAL(KIND=JPRB) ,INTENT(OUT) :: PTRA1(KLON,KLEV+1) REAL(KIND=JPRB) ,INTENT(OUT) :: PTRA2(KLON,KLEV+1) REAL(KIND=JPRB) ,INTENT(OUT) :: PTRCLR(KLON) ! ------------------------------------------------------------------ !* 0.1 ARGUMENTS ! --------- ! ------------------------------------------------------------------ ! ------------ REAL(KIND=JPRB) :: ZC0I(KLON,KLEV+1)& & , ZCLE0(KLON,KLEV), ZCLEAR(KLON) & & , ZR21(KLON)& & , ZR23(KLON) , ZSS0(KLON) , ZSCAT(KLON)& & , ZTR(KLON,2,KLEV+1) INTEGER(KIND=JPIM) :: IKL, JA, JAE, JAJ, JK, JKL, JKLP1, JKM1, JL, INU1 REAL(KIND=JPRB) :: ZBMU0, ZBMU1, ZCORAE, ZDEN, ZDEN1, ZFACOA,& & ZFF, ZGAP, ZGAR, ZMU1, ZMUE, ZRATIO, ZRE11, & & ZTO, ZTRAY, ZWW, ZDENB REAL(KIND=JPRB) :: ZRR,ZMU0,ZI2MU1,ZIMU1,ZIDEN,ZIDEN1 REAL(KIND=JPRB) :: ZHOOK_HANDLE !++MODIFCODE REAL(KIND=JPRB) ::ZFACOA_NEW(KLON,KLEV) !--MODIFCODE ! ------------------------------------------------------------------ !* 1. OPTICAL PARAMETERS FOR AEROSOLS AND RAYLEIGH ! -------------------------------------------- IF (LHOOK) CALL DR_HOOK('SWCLR',0,ZHOOK_HANDLE) DO JK = 1 , KLEV+1 DO JA = 1 , 6 DO JL = KIDIA,KFDIA PRJ(JL,JA,JK) = 0.0_JPRB PRK(JL,JA,JK) = 0.0_JPRB 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) = 0.0_JPRB PPIZAZ(JL,JK) = 0.0_JPRB PTAUAZ(JL,JK) = 0.0_JPRB ZFACOA_NEW(JL,JK) = 0.0_JPRB ENDDO !++MODIFCODE !--OB on fait passer les aerosols LMDZ dans la variable DST IF(NOVLP < 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) PTAUAZ(JL,JK)=PTAU_DST(JL,IKL) ! PPIZAZ(JL,JK)=PPIZAZ(JL,JK)+PAER(JL,JAE,IKL)& ! & * RTAUA(KNU,JAE)*RPIZA(KNU,JAE) PPIZAZ(JL,JK)=PTAU_DST(JL,IKL)*PPIZA_DST(JL,IKL) ! PCGAZ(JL,JK) = PCGAZ(JL,JK) +PAER(JL,JAE,IKL)& ! & * RTAUA(KNU,JAE)*RPIZA(KNU,JAE)*RCGA(KNU,JAE) PCGAZ(JL,JK)=PTAU_DST(JL,IKL)*PPIZA_DST(JL,IKL)*PCGA_DST(JL,IKL) ENDDO ! ENDDO ELSE ! MESONH VERSION !--OB on utilise directement les aerosols LMDZ ! DO JAE=1,6 DO JL = KIDIA,KFDIA !Special optical properties for dust ! IF (LDDUST.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) PTAUAZ(JL,JK)= PTAU_DST(JL,IKL) !wi*ti ! PPIZAZ(JL,JK)=PPIZAZ(JL,JK) + PAER(JL,JAE,IKL) & ! & *PTAUREL_DST(JL,IKL)*PPIZA_DST(JL,IKL) PPIZAZ(JL,JK)=PTAU_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) PCGAZ(JL,JK) = PTAU_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) ZFACOA_NEW(JL,JK)= ZFACOA_NEW(JL,JK)+& & PTAU_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 !--MODIFCODE !++MODIFCODE IF (NOVLP < 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) !!!! wrong ZRATIO = ZTRAY / (ZTRAY + PTAUAZ(JL,JK)) !-- ZGAR = PCGAZ(JL,JK) ZFF = ZGAR * ZGAR !-- bug-fix: ZRATIO must be defined from the transformed value of optical thickness ! MPLFH : ZTRAY N'EST PAS INITIALISE !!!!! A REVOIR (MPL) ZTRAY= PRAYL(JL) * PDSIG(JL,JK) ! print *,'>>>>>>> swclr: ZTRAY ',ZTRAY ZDENB = ZTRAY + PTAUAZ(JL,JK)*(1.0_JPRB-PPIZAZ(JL,JK)*ZFF) ZRATIO=ZTRAY/ZDENB !-- PTAUAZ(JL,JK)=ZTRAY+PTAUAZ(JL,JK)*(1.0_JPRB-PPIZAZ(JL,JK)*ZFF) PCGAZ(JL,JK) = ZGAR * (1.0_JPRB - ZRATIO) / (1.0_JPRB + ZGAR) PPIZAZ(JL,JK) =ZRATIO+(1.0_JPRB-ZRATIO)*PPIZAZ(JL,JK)*(1.0_JPRB-ZFF)& & / (1.0_JPRB - PPIZAZ(JL,JK) * ZFF) ELSE ZTRAY = PRAYL(JL) * PDSIG(JL,JK) PTAUAZ(JL,JK) = ZTRAY PCGAZ(JL,JK) = 0.0_JPRB PPIZAZ(JL,JK) = 1.0_JPRB-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))*& & (1.0_JPRB-PPIZAZ(JL,JK)*ZFACOA_NEW(JL,JK)) !delta-modified parameters w PPIZAZ(JL,JK)=PPIZAZ(JL,JK)*(1.0_JPRB-ZFACOA_NEW(JL,JK))/& & (1.0_JPRB-ZFACOA_NEW(JL,JK)*PPIZAZ(JL,JK)) !delta-modified parameters g PCGAZ(JL,JK)=PCGAZ(JL,JK)/(1.0_JPRB+PCGAZ(JL,JK)) ELSE ZTRAY = PRAYL(JL) * PDSIG(JL,JK) ZFACOA_NEW(JL,JK)= 0.0_JPRB PTAUAZ(JL,JK) = ZTRAY PCGAZ(JL,JK) = 0.0_JPRB PPIZAZ(JL,JK) = 1.0_JPRB-REPSCT ENDIF ENDDO ENDIF !--MODIFCODE ENDDO ! ------------------------------------------------------------------ !* 2. TOTAL EFFECTIVE CLOUDINESS ABOVE A GIVEN LEVEL ! ---------------------------------------------- DO JL = KIDIA,KFDIA ZR23(JL) = 0.0_JPRB ZC0I(JL,KLEV+1) = 0.0_JPRB ZCLEAR(JL) = 1.0_JPRB ZSCAT(JL) = 0.0_JPRB ENDDO JK = 1 JKL = KLEV+1 - JK JKLP1 = JKL + 1 DO JL = KIDIA,KFDIA !++MODIFCODE IF (NOVLP >= 5) THEN ZFACOA = PTAUAZ(JL,JK) ZCORAE = ZFACOA * PSEC(JL) ELSE ZFACOA = 1.0_JPRB - PPIZAZ(JL,JKL)*PCGAZ(JL,JKL)*PCGAZ(JL,JKL) ZCORAE = ZFACOA * PTAUAZ(JL,JKL) * PSEC(JL) ENDIF !--MODIFCODE ZR21(JL) = EXP(-ZCORAE ) ZSS0(JL) = 1.0_JPRB-ZR21(JL) ZCLE0(JL,JKL) = ZSS0(JL) IF (NOVLP == 1 .OR. NOVLP == 4) THEN !* maximum-random ZCLEAR(JL) = ZCLEAR(JL)& & *(1.0_JPRB-MAX(ZSS0(JL),ZSCAT(JL)))& & /(1.0_JPRB-MIN(ZSCAT(JL),1.0_JPRB-REPCLC)) ZC0I(JL,JKL) = 1.0_JPRB - ZCLEAR(JL) ZSCAT(JL) = ZSS0(JL) ELSEIF (NOVLP == 2) THEN !* maximum ZSCAT(JL) = MAX( ZSS0(JL) , ZSCAT(JL) ) ZC0I(JL,JKL) = ZSCAT(JL) !++MODIFCODE ELSEIF ((NOVLP == 3).OR.(NOVLP >= 5)) THEN !--MODIFCODE !* random ZCLEAR(JL)=ZCLEAR(JL)*(1.0_JPRB-ZSS0(JL)) ZSCAT(JL) = 1.0_JPRB - ZCLEAR(JL) ZC0I(JL,JKL) = ZSCAT(JL) ENDIF ENDDO DO JK = 2 , KLEV JKL = KLEV+1 - JK JKLP1 = JKL + 1 DO JL = KIDIA,KFDIA !++MODIFCODE IF (NOVLP >= 5) THEN ZFACOA = PTAUAZ(JL,JK) ZCORAE = ZFACOA * PSEC(JL) ELSE ZFACOA = 1.0_JPRB - PPIZAZ(JL,JKL)*PCGAZ(JL,JKL)*PCGAZ(JL,JKL) ZCORAE = ZFACOA * PTAUAZ(JL,JKL) * PSEC(JL) ENDIF !--MODIFCODE ZR21(JL) = EXP(-ZCORAE ) ZSS0(JL) = 1.0_JPRB-ZR21(JL) ZCLE0(JL,JKL) = ZSS0(JL) IF (NOVLP == 1 .OR. NOVLP == 4) THEN !* maximum-random ZCLEAR(JL) = ZCLEAR(JL)& & *(1.0_JPRB-MAX(ZSS0(JL),ZSCAT(JL)))& & /(1.0_JPRB-MIN(ZSCAT(JL),1.0_JPRB-REPCLC)) ZC0I(JL,JKL) = 1.0_JPRB - ZCLEAR(JL) ZSCAT(JL) = ZSS0(JL) ELSEIF (NOVLP == 2) THEN !* maximum ZSCAT(JL) = MAX( ZSS0(JL) , ZSCAT(JL) ) ZC0I(JL,JKL) = ZSCAT(JL) !++MODIFCODE ELSEIF ((NOVLP == 3).OR.(NOVLP >= 5)) THEN !--MODIFCODE !* random ZCLEAR(JL)=ZCLEAR(JL)*(1.0_JPRB-ZSS0(JL)) ZSCAT(JL) = 1.0_JPRB - ZCLEAR(JL) ZC0I(JL,JKL) = ZSCAT(JL) ENDIF ENDDO ENDDO ! ------------------------------------------------------------------ !* 3. REFLECTIVITY/TRANSMISSIVITY FOR PURE SCATTERING ! ----------------------------------------------- DO JL = KIDIA,KFDIA PRAY1(JL,KLEV+1) = 0.0_JPRB PRAY2(JL,KLEV+1) = 0.0_JPRB PREFZ(JL,2,1) = PALBP(JL,KNU) PREFZ(JL,1,1) = PALBP(JL,KNU) PTRA1(JL,KLEV+1) = 1.0_JPRB PTRA2(JL,KLEV+1) = 1.0_JPRB ENDDO DO JK = 2 , KLEV+1 JKM1 = JK-1 DO JL = KIDIA,KFDIA ! ------------------------------------------------------------------ !* 3.1 EQUIVALENT ZENITH ANGLE ! ----------------------- ZMUE = (1.0_JPRB-ZC0I(JL,JK)) * PSEC(JL)+ ZC0I(JL,JK) * 1.66_JPRB PRMU0(JL,JK) = 1.0_JPRB/ZMUE ZMU0=PRMU0(JL,JK) ! ------------------------------------------------------------------ !* 3.2 REFLECT./TRANSMISSIVITY DUE TO RAYLEIGH AND AEROSOLS ! ---------------------------------------------------- ZGAP = PCGAZ(JL,JKM1) ZBMU0 = 0.5_JPRB - 0.75_JPRB * ZGAP *ZMU0 ZWW = PPIZAZ(JL,JKM1) ZTO = PTAUAZ(JL,JKM1) ZDEN = 1.0_JPRB + (1.0_JPRB - ZWW + ZBMU0 * ZWW) * ZTO * ZMUE & & + (1-ZWW) * (1.0_JPRB - ZWW +2.0_JPRB*ZBMU0*ZWW)*ZTO*ZTO*ZMUE*ZMUE ZIDEN=1.0_JPRB / ZDEN PRAY1(JL,JKM1) = ZBMU0 * ZWW * ZTO * ZMUE * ZIDEN PTRA1(JL,JKM1) = ZIDEN ZMU1 = 0.5_JPRB ZIMU1=2.0_JPRB ZI2MU1=4.0_JPRB ZBMU1 = 0.5_JPRB - 0.75_JPRB * ZGAP * ZMU1 ZDEN1= 1.0_JPRB + (1.0_JPRB - ZWW + ZBMU1 * ZWW) * ZTO * ZIMU1 & & + (1-ZWW) * (1.0_JPRB - ZWW +2.0_JPRB*ZBMU1*ZWW)*ZTO*ZTO*ZI2MU1 ZIDEN1=1.0_JPRB / ZDEN1 PRAY2(JL,JKM1) = ZBMU1 * ZWW * ZTO * ZIMU1 *ZIDEN1 PTRA2(JL,JKM1) = ZIDEN1 ZRR=1.0_JPRB/(1.0_JPRB-PRAY2(JL,JKM1)*PREFZ(JL,1,JKM1)) PREFZ(JL,1,JK) = PRAY1(JL,JKM1)& & + PREFZ(JL,1,JKM1) * PTRA1(JL,JKM1)& & * PTRA2(JL,JKM1)& & *ZRR ZTR(JL,1,JKM1) = PTRA1(JL,JKM1)& & *ZRR 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 = (1.0_JPRB-ZC0I(JL,1))*PSEC(JL)+ZC0I(JL,1)*1.66_JPRB PRMU0(JL,1)=1.0_JPRB/ZMUE PTRCLR(JL)=1.0_JPRB-ZC0I(JL,1) ENDDO ! ------------------------------------------------------------------ !* 3.5 REFLECT./TRANSMISSIVITY BETWEEN SURFACE AND LEVEL ! ------------------------------------------------- IF (NSW <= 4) THEN INU1=1 ELSEIF (NSW == 6) THEN INU1=3 ENDIF IF (KNU <= INU1) THEN JAJ = 2 DO JL = KIDIA,KFDIA PRJ(JL,JAJ,KLEV+1) = 1.0_JPRB 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) = 1.0_JPRB 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 ! ------------------------------------------------------------------ IF (LHOOK) CALL DR_HOOK('SWCLR',1,ZHOOK_HANDLE) END SUBROUTINE SWCLR