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SUBROUTINE swr(knu, palbd, pcg, pcld, pdsig, pomega, prayl, psec, ptau, & |
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pcgaz, ppizaz, pray1, pray2, prefz, prj, prk, prmue, ptauaz, ptra1, & |
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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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|
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! ------------------------------------------------------------------ |
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! PURPOSE. |
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! -------- |
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! COMPUTES THE REFLECTIVITY AND TRANSMISSIVITY IN CASE OF |
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! CONTINUUM SCATTERING |
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|
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! METHOD. |
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! ------- |
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|
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! 1. COMPUTES CONTINUUM FLUXES CORRESPONDING TO AEROSOL |
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! OR/AND RAYLEIGH SCATTERING (NO MOLECULAR GAS ABSORPTION) |
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|
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! REFERENCE. |
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! ---------- |
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|
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! SEE RADIATION'S PART OF THE ECMWF RESEARCH DEPARTMENT |
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! DOCUMENTATION, AND FOUQUART AND BONNEL (1980) |
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|
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! AUTHOR. |
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! ------- |
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! JEAN-JACQUES MORCRETTE *ECMWF* |
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|
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! MODIFICATIONS. |
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! -------------- |
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! ORIGINAL : 89-07-14 |
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! ------------------------------------------------------------------ |
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! * ARGUMENTS: |
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|
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INTEGER knu |
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DOUBLE PRECISION palbd(kdlon, 2) |
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DOUBLE PRECISION pcg(kdlon, 2, kflev) |
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DOUBLE PRECISION pcld(kdlon, kflev) |
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DOUBLE PRECISION pdsig(kdlon, kflev) |
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DOUBLE PRECISION pomega(kdlon, 2, kflev) |
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DOUBLE PRECISION prayl(kdlon) |
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DOUBLE PRECISION psec(kdlon) |
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DOUBLE PRECISION ptau(kdlon, 2, kflev) |
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|
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DOUBLE PRECISION pray1(kdlon, kflev+1) |
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DOUBLE PRECISION pray2(kdlon, kflev+1) |
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DOUBLE PRECISION prefz(kdlon, 2, kflev+1) |
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DOUBLE PRECISION prj(kdlon, 6, kflev+1) |
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DOUBLE PRECISION prk(kdlon, 6, kflev+1) |
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DOUBLE PRECISION prmue(kdlon, kflev+1) |
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DOUBLE PRECISION pcgaz(kdlon, kflev) |
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DOUBLE PRECISION ppizaz(kdlon, kflev) |
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DOUBLE PRECISION ptauaz(kdlon, kflev) |
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DOUBLE PRECISION ptra1(kdlon, kflev+1) |
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DOUBLE PRECISION ptra2(kdlon, kflev+1) |
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|
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! * LOCAL VARIABLES: |
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|
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DOUBLE PRECISION zc1i(kdlon, kflev+1) |
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DOUBLE PRECISION zcleq(kdlon, kflev) |
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DOUBLE PRECISION zclear(kdlon) |
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DOUBLE PRECISION zcloud(kdlon) |
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DOUBLE PRECISION zgg(kdlon) |
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DOUBLE PRECISION zref(kdlon) |
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DOUBLE PRECISION zre1(kdlon) |
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DOUBLE PRECISION zre2(kdlon) |
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DOUBLE PRECISION zrmuz(kdlon) |
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DOUBLE PRECISION zrneb(kdlon) |
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DOUBLE PRECISION zr21(kdlon) |
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DOUBLE PRECISION zr22(kdlon) |
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DOUBLE PRECISION zr23(kdlon) |
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DOUBLE PRECISION zss1(kdlon) |
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DOUBLE PRECISION zto1(kdlon) |
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DOUBLE PRECISION ztr(kdlon, 2, kflev+1) |
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DOUBLE PRECISION ztr1(kdlon) |
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DOUBLE PRECISION ztr2(kdlon) |
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DOUBLE PRECISION zw(kdlon) |
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|
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INTEGER jk, jl, ja, jkl, jklp1, jkm1, jaj |
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DOUBLE PRECISION zfacoa, zfacoc, zcorae, zcorcd |
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DOUBLE PRECISION zmue, zgap, zww, zto, zden, zden1 |
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DOUBLE PRECISION zmu1, zre11, zbmu0, zbmu1 |
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|
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! ------------------------------------------------------------------ |
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|
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! * 1. INITIALIZATION |
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! -------------- |
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|
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|
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DO jk = 1, kflev + 1 |
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DO ja = 1, 6 |
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DO 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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END DO |
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END DO |
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END DO |
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|
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|
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! ------------------------------------------------------------------ |
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|
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! * 2. TOTAL EFFECTIVE CLOUDINESS ABOVE A GIVEN LEVEL |
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! ---------------------------------------------- |
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|
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|
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DO 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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END DO |
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|
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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 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)*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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(1.0-pcld(jl,jkl))*(1.0-zr21(jl)) |
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zcleq(jl, jkl) = zss1(jl) |
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|
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IF (novlp==1) THEN |
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! * maximum-random |
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zclear(jl) = zclear(jl)*(1.0-max(zss1(jl),zcloud(jl)))/ & |
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(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==2) THEN |
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! * 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==3) THEN |
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! * 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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END DO |
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|
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DO jk = 2, kflev |
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jkl = kflev + 1 - jk |
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jklp1 = jkl + 1 |
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DO 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)*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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(1.0-pcld(jl,jkl))*(1.0-zr21(jl)) |
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zcleq(jl, jkl) = zss1(jl) |
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|
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IF (novlp==1) THEN |
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! * maximum-random |
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zclear(jl) = zclear(jl)*(1.0-max(zss1(jl),zcloud(jl)))/ & |
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(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==2) THEN |
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! * 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==3) THEN |
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! * 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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END DO |
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END DO |
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|
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! ------------------------------------------------------------------ |
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|
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! * 3. REFLECTIVITY/TRANSMISSIVITY FOR PURE SCATTERING |
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! ----------------------------------------------- |
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|
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|
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DO 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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END DO |
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|
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DO jk = 2, kflev + 1 |
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jkm1 = jk - 1 |
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DO 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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|
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|
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! ------------------------------------------------------------------ |
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|
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! * 3.1 EQUIVALENT ZENITH ANGLE |
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! ----------------------- |
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|
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|
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zmue = (1.-zc1i(jl,jk))*psec(jl) + zc1i(jl, jk)*1.66 |
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prmue(jl, jk) = 1./zmue |
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|
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|
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! ------------------------------------------------------------------ |
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|
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! * 3.2 REFLECT./TRANSMISSIVITY DUE TO RAYLEIGH AND AEROSOLS |
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! ---------------------------------------------------- |
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|
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|
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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 + (1-zww)*(1.-zww+2.*zbmu0*zww) & |
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*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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! PRINT *,' LOOP 342 ** 3 ** JL=',JL,PRAY1(JL,JKM1),PTRA1(JL,JKM1) |
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|
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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 + (1-zww)*(1.-zww+2.*zbmu1*zww & |
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)*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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|
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|
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! ------------------------------------------------------------------ |
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|
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! * 3.3 EFFECT OF CLOUD LAYER |
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! --------------------- |
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|
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|
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zw(jl) = pomega(jl, knu, jkm1) |
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zto1(jl) = ptau(jl, knu, jkm1)/zw(jl) + ptauaz(jl, jkm1)/ppizaz(jl, & |
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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) + (1.-zr22(jl))*pcgaz(jl, jkm1) |
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! Modif PhD - JJM 19/03/96 pour erreurs arrondis |
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! machine |
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! PHD PROTECTION ZW(JL) = ZR21(JL) / ZTO1(JL) |
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IF (zw(jl)==1. .AND. ppizaz(jl,jkm1)==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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END DO |
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|
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CALL swde(zgg, zref, zrmuz, zto1, zw, zre1, zre2, ztr1, ztr2) |
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|
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DO jl = 1, kdlon |
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|
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prefz(jl, 1, jk) = (1.-zrneb(jl))*(pray1(jl,jkm1)+prefz(jl,1,jkm1)* & |
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ptra1(jl,jkm1)*ptra2(jl,jkm1)/(1.-pray2(jl,jkm1)*prefz(jl,1, & |
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jkm1))) + zrneb(jl)*zre2(jl) |
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|
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ztr(jl, 1, jkm1) = zrneb(jl)*ztr2(jl) + (ptra1(jl,jkm1)/(1.-pray2(jl, & |
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jkm1)*prefz(jl,1,jkm1)))*(1.-zrneb(jl)) |
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|
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prefz(jl, 2, jk) = (1.-zrneb(jl))*(pray1(jl,jkm1)+prefz(jl,2,jkm1)* & |
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ptra1(jl,jkm1)*ptra2(jl,jkm1)) + zrneb(jl)*zre1(jl) |
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|
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ztr(jl, 2, jkm1) = zrneb(jl)*ztr1(jl) + ptra1(jl, jkm1)*(1.-zrneb(jl)) |
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|
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END DO |
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END DO |
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DO 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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END DO |
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|
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|
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! ------------------------------------------------------------------ |
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|
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! * 3.5 REFLECT./TRANSMISSIVITY BETWEEN SURFACE AND LEVEL |
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! ------------------------------------------------- |
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|
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|
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IF (knu==1) THEN |
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jaj = 2 |
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DO 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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END DO |
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|
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DO jk = 1, kflev |
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jkl = kflev + 1 - jk |
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jklp1 = jkl + 1 |
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DO jl = 1, kdlon |
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zre11 = prj(jl, jaj, jklp1)*ztr(jl, 1, jkl) |
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prj(jl, jaj, jkl) = zre11 |
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prk(jl, jaj, jkl) = zre11*prefz(jl, 1, jkl) |
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END DO |
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END DO |
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|
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ELSE |
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|
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DO jaj = 1, 2 |
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DO jl = 1, kdlon |
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prj(jl, jaj, kflev+1) = 1. |
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prk(jl, jaj, kflev+1) = prefz(jl, jaj, kflev+1) |
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END DO |
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|
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DO jk = 1, kflev |
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jkl = kflev + 1 - jk |
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jklp1 = jkl + 1 |
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DO jl = 1, kdlon |
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zre11 = prj(jl, jaj, jklp1)*ztr(jl, jaj, jkl) |
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prj(jl, jaj, jkl) = zre11 |
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prk(jl, jaj, jkl) = zre11*prefz(jl, jaj, jkl) |
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END DO |
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END DO |
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END DO |
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|
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END IF |
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|
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! ------------------------------------------------------------------ |
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|
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RETURN |
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END SUBROUTINE swr |
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