| 1 |
SUBROUTINE SWR ( KNU |
| 2 |
S , PALBD , PCG , PCLD , PDSIG, POMEGA, PRAYL |
| 3 |
S , PSEC , PTAU |
| 4 |
S , PCGAZ , PPIZAZ, PRAY1, PRAY2, PREFZ , PRJ , PRK , PRMUE |
| 5 |
S , PTAUAZ, PTRA1 , PTRA2 ) |
| 6 |
use dimens_m |
| 7 |
use dimphy |
| 8 |
use raddim |
| 9 |
use radepsi |
| 10 |
use radopt |
| 11 |
IMPLICIT none |
| 12 |
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 |
| 17 |
C CONTINUUM SCATTERING |
| 18 |
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) |
| 43 |
REAL*8 PCG(KDLON,2,KFLEV) |
| 44 |
REAL*8 PCLD(KDLON,KFLEV) |
| 45 |
REAL*8 PDSIG(KDLON,KFLEV) |
| 46 |
REAL*8 POMEGA(KDLON,2,KFLEV) |
| 47 |
REAL*8 PRAYL(KDLON) |
| 48 |
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) |
| 57 |
REAL*8 PCGAZ(KDLON,KFLEV) |
| 58 |
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 |
| 205 |
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 |
| 234 |
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) |
| 239 |
ZDEN = 1. + (1. - ZWW + ZBMU0 * ZWW) * ZTO * ZMUE |
| 240 |
S + (1-ZWW) * (1. - ZWW +2.*ZBMU0*ZWW)*ZTO*ZTO*ZMUE*ZMUE |
| 241 |
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) |
| 244 |
C |
| 245 |
ZMU1 = 0.5 |
| 246 |
ZBMU1 = 0.5 - 0.75 * ZGAP * ZMU1 |
| 247 |
ZDEN1= 1. + (1. - ZWW + ZBMU1 * ZWW) * ZTO / ZMU1 |
| 248 |
S + (1-ZWW) * (1. - ZWW +2.*ZBMU1*ZWW)*ZTO*ZTO/ZMU1/ZMU1 |
| 249 |
PRAY2(JL,JKM1) = ZBMU1 * ZWW * ZTO / ZMU1 / ZDEN1 |
| 250 |
PTRA2(JL,JKM1) = 1. / ZDEN1 |
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C |
| 252 |
C |
| 253 |
C ------------------------------------------------------------------ |
| 254 |
C |
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C* 3.3 EFFECT OF CLOUD LAYER |
| 256 |
C --------------------- |
| 257 |
C |
| 258 |
330 CONTINUE |
| 259 |
C |
| 260 |
ZW(JL) = POMEGA(JL,KNU,JKM1) |
| 261 |
ZTO1(JL) = PTAU(JL,KNU,JKM1)/ZW(JL) |
| 262 |
S + PTAUAZ(JL,JKM1)/PPIZAZ(JL,JKM1) |
| 263 |
ZR21(JL) = PTAU(JL,KNU,JKM1) + PTAUAZ(JL,JKM1) |
| 264 |
ZR22(JL) = PTAU(JL,KNU,JKM1) / ZR21(JL) |
| 265 |
ZGG(JL) = ZR22(JL) * PCG(JL,KNU,JKM1) |
| 266 |
S + (1. - ZR22(JL)) * PCGAZ(JL,JKM1) |
| 267 |
C Modif PhD - JJM 19/03/96 pour erreurs arrondis |
| 268 |
C machine |
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C PHD PROTECTION ZW(JL) = ZR21(JL) / ZTO1(JL) |
| 270 |
IF (ZW(JL).EQ.1. .AND. PPIZAZ(JL,JKM1).EQ.1.) THEN |
| 271 |
ZW(JL)=1. |
| 272 |
ELSE |
| 273 |
ZW(JL) = ZR21(JL) / ZTO1(JL) |
| 274 |
END IF |
| 275 |
ZREF(JL) = PREFZ(JL,1,JKM1) |
| 276 |
ZRMUZ(JL) = PRMUE(JL,JK) |
| 277 |
342 CONTINUE |
| 278 |
C |
| 279 |
CALL SWDE(ZGG , ZREF , ZRMUZ , ZTO1 , ZW, |
| 280 |
S ZRE1 , ZRE2 , ZTR1 , ZTR2) |
| 281 |
C |
| 282 |
DO 345 JL = 1, KDLON |
| 283 |
C |
| 284 |
PREFZ(JL,1,JK) = (1.-ZRNEB(JL)) * (PRAY1(JL,JKM1) |
| 285 |
S + PREFZ(JL,1,JKM1) * PTRA1(JL,JKM1) |
| 286 |
S * PTRA2(JL,JKM1) |
| 287 |
S / (1.-PRAY2(JL,JKM1)*PREFZ(JL,1,JKM1))) |
| 288 |
S + ZRNEB(JL) * ZRE2(JL) |
| 289 |
C |
| 290 |
ZTR(JL,1,JKM1) = ZRNEB(JL) * ZTR2(JL) + (PTRA1(JL,JKM1) |
| 291 |
S / (1.-PRAY2(JL,JKM1)*PREFZ(JL,1,JKM1))) |
| 292 |
S * (1.-ZRNEB(JL)) |
| 293 |
C |
| 294 |
PREFZ(JL,2,JK) = (1.-ZRNEB(JL)) * (PRAY1(JL,JKM1) |
| 295 |
S + PREFZ(JL,2,JKM1) * PTRA1(JL,JKM1) |
| 296 |
S * PTRA2(JL,JKM1) ) |
| 297 |
S + ZRNEB(JL) * ZRE1(JL) |
| 298 |
C |
| 299 |
ZTR(JL,2,JKM1) = ZRNEB(JL) * ZTR1(JL) |
| 300 |
S + PTRA1(JL,JKM1) * (1.-ZRNEB(JL)) |
| 301 |
C |
| 302 |
345 CONTINUE |
| 303 |
346 CONTINUE |
| 304 |
DO 347 JL = 1, KDLON |
| 305 |
ZMUE = (1.-ZC1I(JL,1))*PSEC(JL)+ZC1I(JL,1)*1.66 |
| 306 |
PRMUE(JL,1)=1./ZMUE |
| 307 |
347 CONTINUE |
| 308 |
C |
| 309 |
C |
| 310 |
C ------------------------------------------------------------------ |
| 311 |
C |
| 312 |
C* 3.5 REFLECT./TRANSMISSIVITY BETWEEN SURFACE AND LEVEL |
| 313 |
C ------------------------------------------------- |
| 314 |
C |
| 315 |
350 CONTINUE |
| 316 |
C |
| 317 |
IF (KNU.EQ.1) THEN |
| 318 |
JAJ = 2 |
| 319 |
DO 351 JL = 1, KDLON |
| 320 |
PRJ(JL,JAJ,KFLEV+1) = 1. |
| 321 |
PRK(JL,JAJ,KFLEV+1) = PREFZ(JL, 1,KFLEV+1) |
| 322 |
351 CONTINUE |
| 323 |
C |
| 324 |
DO 353 JK = 1 , KFLEV |
| 325 |
JKL = KFLEV+1 - JK |
| 326 |
JKLP1 = JKL + 1 |
| 327 |
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 |
| 346 |
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 |
| 358 |
RETURN |
| 359 |
END |
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