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SUBROUTINE SWR ( KNU |
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S , PALBD , PCG , PCLD , PDSIG, POMEGA, PRAYL |
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S , PSEC , PTAU |
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S , PCGAZ , PPIZAZ, PRAY1, PRAY2, PREFZ , PRJ , PRK , PRMUE |
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S , PTAUAZ, PTRA1 , PTRA2 ) |
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use dimens_m |
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use dimphy |
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use raddim |
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use radepsi |
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use radopt |
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IMPLICIT none |
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C |
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C ------------------------------------------------------------------ |
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C PURPOSE. |
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C -------- |
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C COMPUTES THE REFLECTIVITY AND TRANSMISSIVITY IN CASE OF |
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C CONTINUUM SCATTERING |
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C |
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C METHOD. |
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C ------- |
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C |
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C 1. COMPUTES CONTINUUM FLUXES CORRESPONDING TO AEROSOL |
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C OR/AND RAYLEIGH SCATTERING (NO MOLECULAR GAS ABSORPTION) |
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C |
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C REFERENCE. |
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C ---------- |
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C |
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C SEE RADIATION'S PART OF THE ECMWF RESEARCH DEPARTMENT |
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C DOCUMENTATION, AND FOUQUART AND BONNEL (1980) |
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C |
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C AUTHOR. |
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C ------- |
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C JEAN-JACQUES MORCRETTE *ECMWF* |
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C |
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C MODIFICATIONS. |
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C -------------- |
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C ORIGINAL : 89-07-14 |
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C ------------------------------------------------------------------ |
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C* ARGUMENTS: |
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C |
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INTEGER KNU |
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REAL*8 PALBD(KDLON,2) |
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REAL*8 PCG(KDLON,2,KFLEV) |
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REAL*8 PCLD(KDLON,KFLEV) |
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REAL*8 PDSIG(KDLON,KFLEV) |
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REAL*8 POMEGA(KDLON,2,KFLEV) |
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REAL*8 PRAYL(KDLON) |
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REAL*8 PSEC(KDLON) |
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REAL*8 PTAU(KDLON,2,KFLEV) |
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C |
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REAL*8 PRAY1(KDLON,KFLEV+1) |
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REAL*8 PRAY2(KDLON,KFLEV+1) |
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REAL*8 PREFZ(KDLON,2,KFLEV+1) |
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REAL*8 PRJ(KDLON,6,KFLEV+1) |
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REAL*8 PRK(KDLON,6,KFLEV+1) |
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REAL*8 PRMUE(KDLON,KFLEV+1) |
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REAL*8 PCGAZ(KDLON,KFLEV) |
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REAL*8 PPIZAZ(KDLON,KFLEV) |
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REAL*8 PTAUAZ(KDLON,KFLEV) |
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REAL*8 PTRA1(KDLON,KFLEV+1) |
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REAL*8 PTRA2(KDLON,KFLEV+1) |
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C |
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C* LOCAL VARIABLES: |
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C |
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REAL*8 ZC1I(KDLON,KFLEV+1) |
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REAL*8 ZCLEQ(KDLON,KFLEV) |
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REAL*8 ZCLEAR(KDLON) |
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REAL*8 ZCLOUD(KDLON) |
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REAL*8 ZGG(KDLON) |
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REAL*8 ZREF(KDLON) |
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REAL*8 ZRE1(KDLON) |
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REAL*8 ZRE2(KDLON) |
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REAL*8 ZRMUZ(KDLON) |
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REAL*8 ZRNEB(KDLON) |
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REAL*8 ZR21(KDLON) |
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REAL*8 ZR22(KDLON) |
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REAL*8 ZR23(KDLON) |
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REAL*8 ZSS1(KDLON) |
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REAL*8 ZTO1(KDLON) |
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REAL*8 ZTR(KDLON,2,KFLEV+1) |
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REAL*8 ZTR1(KDLON) |
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REAL*8 ZTR2(KDLON) |
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REAL*8 ZW(KDLON) |
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C |
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INTEGER jk, jl, ja, jkl, jklp1, jkm1, jaj |
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REAL*8 ZFACOA, ZFACOC, ZCORAE, ZCORCD |
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REAL*8 ZMUE, ZGAP, ZWW, ZTO, ZDEN, ZDEN1 |
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REAL*8 ZMU1, ZRE11, ZBMU0, ZBMU1 |
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C |
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C ------------------------------------------------------------------ |
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C |
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C* 1. INITIALIZATION |
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C -------------- |
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C |
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100 CONTINUE |
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C |
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DO 103 JK = 1 , KFLEV+1 |
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DO 102 JA = 1 , 6 |
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DO 101 JL = 1, KDLON |
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PRJ(JL,JA,JK) = 0. |
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PRK(JL,JA,JK) = 0. |
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101 CONTINUE |
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102 CONTINUE |
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103 CONTINUE |
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C |
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C |
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C ------------------------------------------------------------------ |
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C |
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C* 2. TOTAL EFFECTIVE CLOUDINESS ABOVE A GIVEN LEVEL |
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C ---------------------------------------------- |
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C |
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200 CONTINUE |
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C |
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DO 201 JL = 1, KDLON |
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ZR23(JL) = 0. |
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ZC1I(JL,KFLEV+1) = 0. |
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ZCLEAR(JL) = 1. |
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ZCLOUD(JL) = 0. |
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201 CONTINUE |
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C |
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JK = 1 |
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JKL = KFLEV+1 - JK |
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JKLP1 = JKL + 1 |
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DO 202 JL = 1, KDLON |
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ZFACOA = 1. - PPIZAZ(JL,JKL)*PCGAZ(JL,JKL)*PCGAZ(JL,JKL) |
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ZFACOC = 1. - POMEGA(JL,KNU,JKL) * PCG(JL,KNU,JKL) |
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S * PCG(JL,KNU,JKL) |
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ZCORAE = ZFACOA * PTAUAZ(JL,JKL) * PSEC(JL) |
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ZCORCD = ZFACOC * PTAU(JL,KNU,JKL) * PSEC(JL) |
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ZR21(JL) = EXP(-ZCORAE ) |
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ZR22(JL) = EXP(-ZCORCD ) |
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ZSS1(JL) = PCLD(JL,JKL)*(1.0-ZR21(JL)*ZR22(JL)) |
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S + (1.0-PCLD(JL,JKL))*(1.0-ZR21(JL)) |
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ZCLEQ(JL,JKL) = ZSS1(JL) |
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C |
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IF (NOVLP.EQ.1) THEN |
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c* maximum-random |
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ZCLEAR(JL) = ZCLEAR(JL) |
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S *(1.0-MAX(ZSS1(JL),ZCLOUD(JL))) |
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S /(1.0-MIN(ZCLOUD(JL),1.-ZEPSEC)) |
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ZC1I(JL,JKL) = 1.0 - ZCLEAR(JL) |
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ZCLOUD(JL) = ZSS1(JL) |
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ELSE IF (NOVLP.EQ.2) THEN |
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C* maximum |
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ZCLOUD(JL) = MAX( ZSS1(JL) , ZCLOUD(JL) ) |
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ZC1I(JL,JKL) = ZCLOUD(JL) |
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ELSE IF (NOVLP.EQ.3) THEN |
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c* random |
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ZCLEAR(JL) = ZCLEAR(JL)*(1.0 - ZSS1(JL)) |
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ZCLOUD(JL) = 1.0 - ZCLEAR(JL) |
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ZC1I(JL,JKL) = ZCLOUD(JL) |
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END IF |
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202 CONTINUE |
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C |
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DO 205 JK = 2 , KFLEV |
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JKL = KFLEV+1 - JK |
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JKLP1 = JKL + 1 |
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DO 204 JL = 1, KDLON |
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ZFACOA = 1. - PPIZAZ(JL,JKL)*PCGAZ(JL,JKL)*PCGAZ(JL,JKL) |
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ZFACOC = 1. - POMEGA(JL,KNU,JKL) * PCG(JL,KNU,JKL) |
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S * PCG(JL,KNU,JKL) |
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ZCORAE = ZFACOA * PTAUAZ(JL,JKL) * PSEC(JL) |
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ZCORCD = ZFACOC * PTAU(JL,KNU,JKL) * PSEC(JL) |
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ZR21(JL) = EXP(-ZCORAE ) |
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ZR22(JL) = EXP(-ZCORCD ) |
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ZSS1(JL) = PCLD(JL,JKL)*(1.0-ZR21(JL)*ZR22(JL)) |
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S + (1.0-PCLD(JL,JKL))*(1.0-ZR21(JL)) |
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ZCLEQ(JL,JKL) = ZSS1(JL) |
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c |
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IF (NOVLP.EQ.1) THEN |
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c* maximum-random |
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ZCLEAR(JL) = ZCLEAR(JL) |
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S *(1.0-MAX(ZSS1(JL),ZCLOUD(JL))) |
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S /(1.0-MIN(ZCLOUD(JL),1.-ZEPSEC)) |
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ZC1I(JL,JKL) = 1.0 - ZCLEAR(JL) |
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ZCLOUD(JL) = ZSS1(JL) |
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ELSE IF (NOVLP.EQ.2) THEN |
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C* maximum |
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ZCLOUD(JL) = MAX( ZSS1(JL) , ZCLOUD(JL) ) |
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ZC1I(JL,JKL) = ZCLOUD(JL) |
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ELSE IF (NOVLP.EQ.3) THEN |
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c* random |
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ZCLEAR(JL) = ZCLEAR(JL)*(1.0 - ZSS1(JL)) |
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ZCLOUD(JL) = 1.0 - ZCLEAR(JL) |
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ZC1I(JL,JKL) = ZCLOUD(JL) |
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END IF |
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204 CONTINUE |
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205 CONTINUE |
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C |
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C ------------------------------------------------------------------ |
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C |
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C* 3. REFLECTIVITY/TRANSMISSIVITY FOR PURE SCATTERING |
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C ----------------------------------------------- |
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C |
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300 CONTINUE |
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C |
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DO 301 JL = 1, KDLON |
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PRAY1(JL,KFLEV+1) = 0. |
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PRAY2(JL,KFLEV+1) = 0. |
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PREFZ(JL,2,1) = PALBD(JL,KNU) |
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PREFZ(JL,1,1) = PALBD(JL,KNU) |
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PTRA1(JL,KFLEV+1) = 1. |
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PTRA2(JL,KFLEV+1) = 1. |
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301 CONTINUE |
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C |
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DO 346 JK = 2 , KFLEV+1 |
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JKM1 = JK-1 |
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DO 342 JL = 1, KDLON |
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ZRNEB(JL)= PCLD(JL,JKM1) |
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ZRE1(JL)=0. |
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ZTR1(JL)=0. |
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ZRE2(JL)=0. |
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ZTR2(JL)=0. |
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C |
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C |
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C ------------------------------------------------------------------ |
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C |
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C* 3.1 EQUIVALENT ZENITH ANGLE |
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C ----------------------- |
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C |
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310 CONTINUE |
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C |
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ZMUE = (1.-ZC1I(JL,JK)) * PSEC(JL) |
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S + ZC1I(JL,JK) * 1.66 |
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PRMUE(JL,JK) = 1./ZMUE |
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C |
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C |
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C ------------------------------------------------------------------ |
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C |
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C* 3.2 REFLECT./TRANSMISSIVITY DUE TO RAYLEIGH AND AEROSOLS |
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C ---------------------------------------------------- |
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C |
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320 CONTINUE |
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C |
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ZGAP = PCGAZ(JL,JKM1) |
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ZBMU0 = 0.5 - 0.75 * ZGAP / ZMUE |
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ZWW = PPIZAZ(JL,JKM1) |
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ZTO = PTAUAZ(JL,JKM1) |
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ZDEN = 1. + (1. - ZWW + ZBMU0 * ZWW) * ZTO * ZMUE |
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S + (1-ZWW) * (1. - ZWW +2.*ZBMU0*ZWW)*ZTO*ZTO*ZMUE*ZMUE |
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PRAY1(JL,JKM1) = ZBMU0 * ZWW * ZTO * ZMUE / ZDEN |
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PTRA1(JL,JKM1) = 1. / ZDEN |
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c PRINT *,' LOOP 342 ** 3 ** JL=',JL,PRAY1(JL,JKM1),PTRA1(JL,JKM1) |
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C |
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ZMU1 = 0.5 |
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ZBMU1 = 0.5 - 0.75 * ZGAP * ZMU1 |
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ZDEN1= 1. + (1. - ZWW + ZBMU1 * ZWW) * ZTO / ZMU1 |
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S + (1-ZWW) * (1. - ZWW +2.*ZBMU1*ZWW)*ZTO*ZTO/ZMU1/ZMU1 |
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PRAY2(JL,JKM1) = ZBMU1 * ZWW * ZTO / ZMU1 / ZDEN1 |
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PTRA2(JL,JKM1) = 1. / ZDEN1 |
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C |
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C |
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C ------------------------------------------------------------------ |
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C |
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C* 3.3 EFFECT OF CLOUD LAYER |
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C --------------------- |
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C |
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330 CONTINUE |
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C |
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ZW(JL) = POMEGA(JL,KNU,JKM1) |
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ZTO1(JL) = PTAU(JL,KNU,JKM1)/ZW(JL) |
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S + PTAUAZ(JL,JKM1)/PPIZAZ(JL,JKM1) |
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ZR21(JL) = PTAU(JL,KNU,JKM1) + PTAUAZ(JL,JKM1) |
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ZR22(JL) = PTAU(JL,KNU,JKM1) / ZR21(JL) |
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ZGG(JL) = ZR22(JL) * PCG(JL,KNU,JKM1) |
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S + (1. - ZR22(JL)) * PCGAZ(JL,JKM1) |
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C Modif PhD - JJM 19/03/96 pour erreurs arrondis |
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C machine |
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C PHD PROTECTION ZW(JL) = ZR21(JL) / ZTO1(JL) |
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IF (ZW(JL).EQ.1. .AND. PPIZAZ(JL,JKM1).EQ.1.) THEN |
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ZW(JL)=1. |
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ELSE |
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ZW(JL) = ZR21(JL) / ZTO1(JL) |
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END IF |
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ZREF(JL) = PREFZ(JL,1,JKM1) |
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ZRMUZ(JL) = PRMUE(JL,JK) |
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342 CONTINUE |
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C |
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CALL SWDE(ZGG , ZREF , ZRMUZ , ZTO1 , ZW, |
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S ZRE1 , ZRE2 , ZTR1 , ZTR2) |
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C |
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DO 345 JL = 1, KDLON |
283 |
C |
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PREFZ(JL,1,JK) = (1.-ZRNEB(JL)) * (PRAY1(JL,JKM1) |
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S + PREFZ(JL,1,JKM1) * PTRA1(JL,JKM1) |
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S * PTRA2(JL,JKM1) |
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S / (1.-PRAY2(JL,JKM1)*PREFZ(JL,1,JKM1))) |
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S + ZRNEB(JL) * ZRE2(JL) |
289 |
C |
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ZTR(JL,1,JKM1) = ZRNEB(JL) * ZTR2(JL) + (PTRA1(JL,JKM1) |
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S / (1.-PRAY2(JL,JKM1)*PREFZ(JL,1,JKM1))) |
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S * (1.-ZRNEB(JL)) |
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C |
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PREFZ(JL,2,JK) = (1.-ZRNEB(JL)) * (PRAY1(JL,JKM1) |
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S + PREFZ(JL,2,JKM1) * PTRA1(JL,JKM1) |
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S * PTRA2(JL,JKM1) ) |
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S + ZRNEB(JL) * ZRE1(JL) |
298 |
C |
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ZTR(JL,2,JKM1) = ZRNEB(JL) * ZTR1(JL) |
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S + PTRA1(JL,JKM1) * (1.-ZRNEB(JL)) |
301 |
C |
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345 CONTINUE |
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346 CONTINUE |
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DO 347 JL = 1, KDLON |
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ZMUE = (1.-ZC1I(JL,1))*PSEC(JL)+ZC1I(JL,1)*1.66 |
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PRMUE(JL,1)=1./ZMUE |
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347 CONTINUE |
308 |
C |
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C |
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C ------------------------------------------------------------------ |
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C |
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C* 3.5 REFLECT./TRANSMISSIVITY BETWEEN SURFACE AND LEVEL |
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C ------------------------------------------------- |
314 |
C |
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350 CONTINUE |
316 |
C |
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IF (KNU.EQ.1) THEN |
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JAJ = 2 |
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DO 351 JL = 1, KDLON |
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PRJ(JL,JAJ,KFLEV+1) = 1. |
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PRK(JL,JAJ,KFLEV+1) = PREFZ(JL, 1,KFLEV+1) |
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351 CONTINUE |
323 |
C |
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DO 353 JK = 1 , KFLEV |
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JKL = KFLEV+1 - JK |
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JKLP1 = JKL + 1 |
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DO 352 JL = 1, KDLON |
328 |
ZRE11= PRJ(JL,JAJ,JKLP1) * ZTR(JL, 1,JKL) |
329 |
PRJ(JL,JAJ,JKL) = ZRE11 |
330 |
PRK(JL,JAJ,JKL) = ZRE11 * PREFZ(JL, 1,JKL) |
331 |
352 CONTINUE |
332 |
353 CONTINUE |
333 |
354 CONTINUE |
334 |
C |
335 |
ELSE |
336 |
C |
337 |
DO 358 JAJ = 1 , 2 |
338 |
DO 355 JL = 1, KDLON |
339 |
PRJ(JL,JAJ,KFLEV+1) = 1. |
340 |
PRK(JL,JAJ,KFLEV+1) = PREFZ(JL,JAJ,KFLEV+1) |
341 |
355 CONTINUE |
342 |
C |
343 |
DO 357 JK = 1 , KFLEV |
344 |
JKL = KFLEV+1 - JK |
345 |
JKLP1 = JKL + 1 |
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DO 356 JL = 1, KDLON |
347 |
ZRE11= PRJ(JL,JAJ,JKLP1) * ZTR(JL,JAJ,JKL) |
348 |
PRJ(JL,JAJ,JKL) = ZRE11 |
349 |
PRK(JL,JAJ,JKL) = ZRE11 * PREFZ(JL,JAJ,JKL) |
350 |
356 CONTINUE |
351 |
357 CONTINUE |
352 |
358 CONTINUE |
353 |
C |
354 |
END IF |
355 |
C |
356 |
C ------------------------------------------------------------------ |
357 |
C |
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RETURN |
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END |