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C $Header: /u/gcmpack/MITgcm/pkg/fizhi/fizhi_lwrad.F,v 1.8 2004/07/13 23:44:43 molod Exp $ |
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C $Name: $ |
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|
| 4 |
#include "CPP_OPTIONS.h" |
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#include "PACKAGES_CONFIG.h" |
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subroutine lwrio (nymd,nhms,bi,bj,istrip,npcs,low_level,mid_level, |
| 7 |
. pz,plz,plze,dpres,pkht,pkz,tz,qz,oz, |
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. co2,cfc11,cfc12,cfc22,methane,n2o,emissivity, |
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. tgz,radlwg,st4,dst4, |
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. dtradlw,dlwdtg,dtradlwc,lwgclr, |
| 11 |
. im,jm,lm,ptop, |
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. nlwcld,cldlw,clwmo,nlwlz,lwlz, |
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. lpnt,imstturb,qliqave,fccave,landtype) |
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|
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implicit none |
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#ifdef ALLOW_DIAGNOSTICS |
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#include "SIZE.h" |
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#include "diagnostics_SIZE.h" |
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#include "diagnostics.h" |
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#endif |
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|
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c Input Variables |
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c --------------- |
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integer nymd,nhms,istrip,npcs,bi,bj |
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integer mid_level,low_level |
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integer im,jm,lm |
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real ptop |
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real pz(im,jm),plz(im,jm,lm),plze(im,jm,lm+1) |
| 29 |
real dpres(im,jm,lm),pkht(im,jm,lm+1),pkz(im,jm,lm) |
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real tz(im,jm,lm),qz(im,jm,lm),oz(im,jm,lm) |
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real co2,cfc11,cfc12,cfc22,methane(lm),n2o(lm) |
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real emissivity(im,jm,10) |
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real tgz(im,jm),radlwg(im,jm),st4(im,jm),dst4(im,jm) |
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real dtradlw(im,jm,lm),dlwdtg (im,jm,lm) |
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real dtradlwc(im,jm,lm),lwgclr(im,jm) |
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integer nlwcld,nlwlz |
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real cldlw(im,jm,lm),clwmo(im,jm,lm),lwlz(im,jm,lm) |
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logical lpnt |
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integer imstturb |
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real qliqave(im,jm,lm),fccave(im,jm,lm) |
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integer landtype(im,jm) |
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|
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c Local Variables |
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c --------------- |
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integer i,j,l,n,nn |
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|
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real cldtot (im,jm,lm) |
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real cldmxo (im,jm,lm) |
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|
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real pl(istrip,lm) |
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real pk(istrip,lm) |
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real pke(istrip,lm) |
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real ple(istrip,lm+1) |
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|
| 55 |
real ADELPL(ISTRIP,lm) |
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real dtrad(istrip,lm),dtradc(istrip,lm) |
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real OZL(ISTRIP,lm),TZL(ISTRIP,lm) |
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real SHZL(ISTRIP,lm),CLRO(ISTRIP,lm) |
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real CLMO(ISTRIP,lm) |
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real flx(ISTRIP,lm+1),flxclr(ISTRIP,lm+1) |
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real cldlz(istrip,lm) |
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real dfdts(istrip,lm+1),dtdtg(istrip,lm) |
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|
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real emiss(istrip,10) |
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real taual(istrip,lm,10) |
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real ssaal(istrip,lm,10) |
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real asyal(istrip,lm,10) |
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real cwc(istrip,lm,3) |
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real reff(istrip,lm,3) |
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real tauc(istrip,lm,3) |
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|
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real SGMT4(ISTRIP),TSURF(ISTRIP),dsgmt4(ISTRIP) |
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integer lwi(istrip) |
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|
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real getcon,secday,convrt |
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|
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logical high, trace, cldwater |
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data high /.true./ |
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data trace /.true./ |
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data cldwater /.false./ |
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|
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C ********************************************************************** |
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C **** INITIALIZATION **** |
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C ********************************************************************** |
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|
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SECDAY = GETCON('SDAY') |
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CONVRT = GETCON('GRAVITY') / ( 100.0 * GETCON('CP') ) |
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|
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c Adjust cloud fractions and cloud liquid water due to moist turbulence |
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c --------------------------------------------------------------------- |
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if(imstturb.ne.0) then |
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do L =1,lm |
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do j =1,jm |
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do i =1,im |
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cldtot(i,j,L)=min(1.0,max(cldlw(i,j,L),fccave(i,j,L)/imstturb)) |
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cldmxo(i,j,L) = min( 1.0 , clwmo(i,j,L) ) |
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lwlz(i,j,L) = lwlz(i,j,L) + qliqave(i,j,L)/imstturb |
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enddo |
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enddo |
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enddo |
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else |
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do L =1,lm |
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do j =1,jm |
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do i =1,im |
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cldtot(i,j,L) = min( 1.0,cldlw(i,j,L) ) |
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cldmxo(i,j,L) = min( 1.0,clwmo(i,j,L) ) |
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enddo |
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enddo |
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enddo |
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endif |
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|
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C*********************************************************************** |
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C **** LOOP OVER STRIPS **** |
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C ********************************************************************** |
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|
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DO 1000 NN=1,NPCS |
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|
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C ********************************************************************** |
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C **** VARIABLE INITIALIZATION **** |
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C ********************************************************************** |
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|
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CALL STRIP (OZ,OZL ,im*jm,ISTRIP,lm ,NN) |
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CALL STRIP (PLZE,ple ,im*jm,ISTRIP,lm+1 ,NN) |
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CALL STRIP (PLZ ,pl ,im*jm,ISTRIP,lm ,NN) |
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CALL STRIP (PKZ ,pk ,im*jm,ISTRIP,lm ,NN) |
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CALL STRIP (PKHT,pke ,im*jm,ISTRIP,lm ,NN) |
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CALL STRIP (TZ,TZL ,im*jm,ISTRIP,lm ,NN) |
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CALL STRIP (qz,SHZL ,im*jm,ISTRIP,lm ,NN) |
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CALL STRIP (cldtot,CLRO ,im*jm,ISTRIP,lm ,NN) |
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CALL STRIP (cldmxo,CLMO ,im*jm,ISTRIP,lm ,NN) |
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CALL STRIP (lwlz,cldlz ,im*jm,ISTRIP,lm ,NN) |
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CALL STRIP (tgz,tsurf ,im*jm,ISTRIP,1 ,NN) |
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|
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CALL STRIP (emissivity,emiss,im*jm,ISTRIP,10,NN) |
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|
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call stripitint (landtype,lwi,im*jm,im*jm,istrip,1,nn) |
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|
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DO I = 1,ISTRIP*lm |
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ADELPL(I,1) = convrt / ( ple(I,2)-ple(I,1) ) |
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ENDDO |
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|
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C Compute Clouds |
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C -------------- |
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IF(NLWCLD.NE.0)THEN |
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DO L = 1,lm |
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DO I = 1,ISTRIP |
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CLRO(I,L) = min( 1.0,clro(i,L) ) |
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CLMO(I,L) = min( 1.0,clmo(i,L) ) |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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DO L = 1,lm |
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DO I = 1,ISTRIP |
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TZL(I,L) = TZL(I,L)*pk(I,L) |
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ENDDO |
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ENDDO |
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DO I = 1,ISTRIP |
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C To reduce longwave heating in lowest model layer |
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TZL(I,lm) = ( 2*tzl(i,lm)+tsurf(i) )/3.0 |
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ENDDO |
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|
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C Compute Optical Thicknesses |
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C --------------------------- |
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call opthk ( tzl,pl,ple,cldlz,clro,clmo,lwi,istrip,1,lm,tauc ) |
| 166 |
|
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do n = 1,3 |
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do L = 1,lm |
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do i = 1,istrip |
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tauc(i,L,n) = tauc(i,L,n)*0.75 |
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enddo |
| 172 |
enddo |
| 173 |
enddo |
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|
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C Set the optical thickness, single scattering albedo and assymetry factor |
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C for aerosols equal to zero to omit the contribution of aerosols |
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c------------------------------------------------------------------------- |
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do n = 1,10 |
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do L = 1,lm |
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do i = 1,istrip |
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taual(i,L,n) = 0. |
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ssaal(i,L,n) = 0. |
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asyal(i,L,n) = 0. |
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enddo |
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enddo |
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enddo |
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|
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C Set cwc and reff to zero - when cldwater is .false. |
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c---------------------------------------------------- |
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do n = 1,3 |
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do L = 1,lm |
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do i = 1,istrip |
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cwc(i,L,n) = 0. |
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reff(i,L,n) = 0. |
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enddo |
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enddo |
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enddo |
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|
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C ********************************************************************** |
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C **** CALL M-D Chou RADIATION **** |
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C ********************************************************************** |
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|
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call irrad ( istrip,1,1,lm,ple,tzl,shzl,ozl,tsurf,co2, |
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. n2o,methane,cfc11,cfc12,cfc22,emiss, |
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. cldwater,cwc,tauc,reff,clro,mid_level,low_level, |
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. taual,ssaal,asyal, |
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. high,trace,flx,flxclr,dfdts,sgmt4 ) |
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|
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C ********************************************************************** |
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C **** HEATING RATES **** |
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C ********************************************************************** |
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|
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do L = 1,lm |
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do i = 1,istrip |
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dtrad(i,L) = ( flx(i,L)- flx(i,L+1))*adelpl(i,L) |
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dtdtg(i,L) = ( dfdts(i,L)- dfdts(i,L+1))*adelpl(i,L) |
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dtradc(i,L) = (flxclr(i,L)-flxclr(i,L+1))*adelpl(i,L) |
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enddo |
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enddo |
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|
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C ********************************************************************** |
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C **** NET UPWARD LONGWAVE FLUX (W/M**2) **** |
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C ********************************************************************** |
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|
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DO I = 1,ISTRIP |
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flx (i,1) = -flx (i,1) |
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flxclr(i,1) = -flxclr(i,1) |
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flx (i,lm+1) = -flx (i,lm+1) |
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flxclr(i,lm+1) = -flxclr(i,lm+1) |
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sgmt4(i) = - sgmt4(i) |
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dsgmt4(i) = - dfdts(i,lm+1) |
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ENDDO |
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|
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CALL PASTE ( flx (1,lm+1),RADLWG,ISTRIP,im*jm,1,NN ) |
| 235 |
CALL PASTE ( flxclr(1,lm+1),LWGCLR,ISTRIP,im*jm,1,NN ) |
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|
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CALL PASTE ( sgmt4, st4,ISTRIP,im*jm,1,NN ) |
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CALL PASTE ( dsgmt4,dst4,ISTRIP,im*jm,1,NN ) |
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|
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C ********************************************************************** |
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C **** PASTE AND BUMP SOME DIAGNOSTICS **** |
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C ********************************************************************** |
| 243 |
|
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IF(IOLR.GT.0)CALL PSTBMP(flx(1,1),QDIAG(1,1,IOLR,bi,bj),ISTRIP, |
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. im*jm, 1,NN) |
| 246 |
IF(IOLRCLR.GT.0)CALL PSTBMP(flxclr(1,1),QDIAG(1,1,IOLRCLR,bi,bj), |
| 247 |
. ISTRIP,im*jm,1,NN) |
| 248 |
IF(IOZLW.GT.0)CALL PSTBMP(OZL(1,1),QDIAG(1,1,IOZLW,bi,bj),ISTRIP, |
| 249 |
. im*jm,lm,NN) |
| 250 |
|
| 251 |
C ********************************************************************** |
| 252 |
C **** TENDENCY UPDATES **** |
| 253 |
C ********************************************************************** |
| 254 |
|
| 255 |
DO L = 1,lm |
| 256 |
DO I = 1,ISTRIP |
| 257 |
DTRAD (I,L) = ( ple(i,lm+1)-PTOP ) * DTRAD (I,L)/pk(I,L) |
| 258 |
DTRADC(I,L) = ( ple(i,lm+1)-PTOP ) * DTRADC(I,L)/pk(I,L) |
| 259 |
dtdtg(I,L) = ( ple(i,lm+1)-PTOP ) * dtdtg (I,L)/pk(I,L) |
| 260 |
ENDDO |
| 261 |
ENDDO |
| 262 |
CALL PASTE ( DTRAD ,DTRADLW ,ISTRIP,im*jm,lm,NN ) |
| 263 |
CALL PASTE ( DTRADC,DTRADLWC,ISTRIP,im*jm,lm,NN ) |
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CALL PASTE ( dtdtg ,dlwdtg ,ISTRIP,im*jm,lm,NN ) |
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|
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1000 CONTINUE |
| 267 |
|
| 268 |
C ********************************************************************** |
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C **** BUMP DIAGNOSTICS **** |
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C ********************************************************************** |
| 271 |
|
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if(itgrlw.ne.0) then |
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do j = 1,jm |
| 274 |
do i = 1,im |
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qdiag(i,j,itgrlw,bi,bj) = qdiag(i,j,itgrlw,bi,bj) + tgz(i,j) |
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enddo |
| 277 |
enddo |
| 278 |
endif |
| 279 |
|
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if (itlw.ne.0) then |
| 281 |
do L = 1,lm |
| 282 |
do j = 1,jm |
| 283 |
do i = 1,im |
| 284 |
qdiag(i,j,itlw+L-1,bi,bj) = qdiag(i,j,itlw+L-1,bi,bj) + |
| 285 |
. tz(i,j,L)*pkz(i,j,L) |
| 286 |
enddo |
| 287 |
enddo |
| 288 |
enddo |
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endif |
| 290 |
|
| 291 |
if (ishrad.ne.0) then |
| 292 |
do L = 1,lm |
| 293 |
do j = 1,jm |
| 294 |
do i = 1,im |
| 295 |
qdiag(i,j,ishrad+L-1,bi,bj) = qdiag(i,j,ishrad+L-1,bi,bj) + |
| 296 |
. qz(i,j,L)*1000 |
| 297 |
enddo |
| 298 |
enddo |
| 299 |
enddo |
| 300 |
endif |
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|
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|
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C ********************************************************************** |
| 304 |
C **** Increment Diagnostics Counters and Zero-Out Cloud Info **** |
| 305 |
C ********************************************************************** |
| 306 |
|
| 307 |
ntlw = ntlw + 1 |
| 308 |
nshrad = nshrad + 1 |
| 309 |
nozlw = nozlw + 1 |
| 310 |
ntgrlw = ntgrlw + 1 |
| 311 |
nolr = nolr + 1 |
| 312 |
nolrclr = nolrclr + 1 |
| 313 |
|
| 314 |
nlwlz = 0 |
| 315 |
nlwcld = 0 |
| 316 |
imstturb = 0 |
| 317 |
|
| 318 |
do L = 1,lm |
| 319 |
do j = 1,jm |
| 320 |
do i = 1,im |
| 321 |
fccave(i,j,L) = 0. |
| 322 |
qliqave(i,j,L) = 0. |
| 323 |
enddo |
| 324 |
enddo |
| 325 |
enddo |
| 326 |
|
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return |
| 328 |
end |
| 329 |
c********************** November 26, 1997 ************************** |
| 330 |
|
| 331 |
subroutine irrad (m,n,ndim,np,pl,ta,wa,oa,ts,co2, |
| 332 |
* n2o,ch4,cfc11,cfc12,cfc22,emiss, |
| 333 |
* cldwater,cwc,taucl,reff,fcld,ict,icb, |
| 334 |
* taual,ssaal,asyal, |
| 335 |
* high,trace,flx,flc,dfdts,st4) |
| 336 |
|
| 337 |
c*********************************************************************** |
| 338 |
c |
| 339 |
c Version IR-5 (September, 1998) |
| 340 |
c |
| 341 |
c New features of this version are: |
| 342 |
c (1) The effect of aerosol scattering on LW fluxes is included. |
| 343 |
c (2) Absorption and scattering of rain drops are included. |
| 344 |
c |
| 345 |
c*********************************************************************** |
| 346 |
c |
| 347 |
c Version IR-4 (October, 1997) |
| 348 |
c |
| 349 |
c New features of this version are: |
| 350 |
c (1) The surface is treated as non-black. The surface |
| 351 |
c emissivity, emiss, is an input parameter |
| 352 |
c (2) The effect of cloud scattering on LW fluxes is included |
| 353 |
c |
| 354 |
c********************************************************************* |
| 355 |
c |
| 356 |
c This routine computes ir fluxes due to water vapor, co2, o3, |
| 357 |
c trace gases (n2o, ch4, cfc11, cfc12, cfc22, co2-minor), |
| 358 |
c clouds, and aerosols. |
| 359 |
c |
| 360 |
c This is a vectorized code. It computes fluxes simultaneously for |
| 361 |
c (m x n) soundings, which is a subset of (m x ndim) soundings. |
| 362 |
c In a global climate model, m and ndim correspond to the numbers of |
| 363 |
c grid boxes in the zonal and meridional directions, respectively. |
| 364 |
c |
| 365 |
c Some detailed descriptions of the radiation routine are given in |
| 366 |
c Chou and Suarez (1994). |
| 367 |
c |
| 368 |
c Ice and liquid cloud particles are allowed to co-exist in any of the |
| 369 |
c np layers. |
| 370 |
c |
| 371 |
c If no information is available for the effective cloud particle size, |
| 372 |
c reff, default values of 10 micron for liquid water and 75 micron |
| 373 |
c for ice can be used. |
| 374 |
c |
| 375 |
c The maximum-random assumption is applied for cloud overlapping. |
| 376 |
c clouds are grouped into high, middle, and low clouds separated by the |
| 377 |
c level indices ict and icb. Within each of the three groups, clouds |
| 378 |
c are assumed maximally overlapped, and the cloud cover of a group is |
| 379 |
c the maximum cloud cover of all the layers in the group. clouds among |
| 380 |
c the three groups are assumed randomly overlapped. The indices ict and |
| 381 |
c icb correpond approximately to the 400 mb and 700 mb levels. |
| 382 |
c |
| 383 |
c Aerosols are allowed to be in any of the np layers. Aerosol optical |
| 384 |
c properties can be specified as functions of height and spectral band. |
| 385 |
c |
| 386 |
c There are options for computing fluxes: |
| 387 |
c |
| 388 |
c If cldwater=.true., taucl is computed from cwc and reff as a |
| 389 |
c function of height and spectral band. |
| 390 |
c If cldwater=.false., taucl must be given as input to the radiation |
| 391 |
c routine. It is independent of spectral band. |
| 392 |
c |
| 393 |
c If high = .true., transmission functions in the co2, o3, and the |
| 394 |
c three water vapor bands with strong absorption are computed using |
| 395 |
c table look-up. cooling rates are computed accurately from the |
| 396 |
c surface up to 0.01 mb. |
| 397 |
c If high = .false., transmission functions are computed using the |
| 398 |
c k-distribution method with linear pressure scaling for all spectral |
| 399 |
c bands and gases. cooling rates are not calculated accurately for |
| 400 |
c pressures less than 20 mb. the computation is faster with |
| 401 |
c high=.false. than with high=.true. |
| 402 |
|
| 403 |
c If trace = .true., absorption due to n2o, ch4, cfcs, and the |
| 404 |
c two minor co2 bands in the window region is included. |
| 405 |
c If trace = .false., absorption in minor bands is neglected. |
| 406 |
c |
| 407 |
c The IR spectrum is divided into nine bands: |
| 408 |
c |
| 409 |
c band wavenumber (/cm) absorber |
| 410 |
c |
| 411 |
c 1 0 - 340 h2o |
| 412 |
c 2 340 - 540 h2o |
| 413 |
c 3 540 - 800 h2o,cont,co2,n2o |
| 414 |
c 4 800 - 980 h2o,cont |
| 415 |
c co2,f11,f12,f22 |
| 416 |
c 5 980 - 1100 h2o,cont,o3 |
| 417 |
c co2,f11 |
| 418 |
c 6 1100 - 1215 h2o,cont |
| 419 |
c n2o,ch4,f12,f22 |
| 420 |
c 7 1215 - 1380 h2o |
| 421 |
c n2o,ch4 |
| 422 |
c 8 1380 - 1900 h2o |
| 423 |
c 9 1900 - 3000 h2o |
| 424 |
c |
| 425 |
c In addition, a narrow band in the 15 micrometer region is added to |
| 426 |
c compute flux reduction due to n2o |
| 427 |
c |
| 428 |
c 10 540 - 620 h2o,cont,co2,n2o |
| 429 |
c |
| 430 |
c Band 3 (540-800/cm) is further divided into 3 sub-bands : |
| 431 |
c |
| 432 |
c subband wavenumber (/cm) |
| 433 |
c |
| 434 |
c 1 540 - 620 |
| 435 |
c 2 620 - 720 |
| 436 |
c 3 720 - 800 |
| 437 |
c |
| 438 |
c---- Input parameters units size |
| 439 |
c |
| 440 |
c number of soundings in zonal direction (m) n/d 1 |
| 441 |
c number of soundings in meridional direction (n) n/d 1 |
| 442 |
c maximum number of soundings in |
| 443 |
c meridional direction (ndim>=n) n/d 1 |
| 444 |
c number of atmospheric layers (np) n/d 1 |
| 445 |
c level pressure (pl) mb m*ndim*(np+1) |
| 446 |
c layer temperature (ta) k m*ndim*np |
| 447 |
c layer specific humidity (wa) g/g m*ndim*np |
| 448 |
c layer ozone mixing ratio by mass (oa) g/g m*ndim*np |
| 449 |
c surface temperature (ts) k m*ndim |
| 450 |
c co2 mixing ratio by volumn (co2) pppv 1 |
| 451 |
c n2o mixing ratio by volumn (n2o) pppv np |
| 452 |
c ch4 mixing ratio by volumn (ch4) pppv np |
| 453 |
c cfc11 mixing ratio by volumn (cfc11) pppv 1 |
| 454 |
c cfc12 mixing ratio by volumn (cfc12) pppv 1 |
| 455 |
c cfc22 mixing ratio by volumn (cfc22) pppv 1 |
| 456 |
c surface emissivity (emiss) fraction m*ndim*10 |
| 457 |
c input option for cloud optical thickness n/d 1 |
| 458 |
c cldwater="true" if cwc is provided |
| 459 |
c cldwater="false" if taucl is provided |
| 460 |
c cloud water mixing ratio (cwc) gm/gm m*ndim*np*3 |
| 461 |
c index 1 for ice particles |
| 462 |
c index 2 for liquid drops |
| 463 |
c index 3 for rain drops |
| 464 |
c cloud optical thickness (taucl) n/d m*ndim*np*3 |
| 465 |
c index 1 for ice particles |
| 466 |
c index 2 for liquid drops |
| 467 |
c index 3 for rain drops |
| 468 |
c effective cloud-particle size (reff) micrometer m*ndim*np*3 |
| 469 |
c index 1 for ice particles |
| 470 |
c index 2 for liquid drops |
| 471 |
c index 3 for rain drops |
| 472 |
c cloud amount (fcld) fraction m*ndim*np |
| 473 |
c level index separating high and middle n/d 1 |
| 474 |
c clouds (ict) |
| 475 |
c level index separating middle and low n/d 1 |
| 476 |
c clouds (icb) |
| 477 |
c aerosol optical thickness (taual) n/d m*ndim*np*10 |
| 478 |
c aerosol single-scattering albedo (ssaal) n/d m*ndim*np*10 |
| 479 |
c aerosol asymmetry factor (asyal) n/d m*ndim*np*10 |
| 480 |
c high (see explanation above) 1 |
| 481 |
c trace (see explanation above) 1 |
| 482 |
c |
| 483 |
c Data used in table look-up for transmittance calculations: |
| 484 |
c |
| 485 |
c c1 , c2, c3: for co2 (band 3) |
| 486 |
c o1 , o2, o3: for o3 (band 5) |
| 487 |
c h11,h12,h13: for h2o (band 1) |
| 488 |
c h21,h22,h23: for h2o (band 2) |
| 489 |
c h81,h82,h83: for h2o (band 8) |
| 490 |
c |
| 491 |
c---- output parameters |
| 492 |
c |
| 493 |
c net downward flux, all-sky (flx) w/m**2 m*ndim*(np+1) |
| 494 |
c net downward flux, clear-sky (flc) w/m**2 m*ndim*(np+1) |
| 495 |
c sensitivity of net downward flux |
| 496 |
c to surface temperature (dfdts) w/m**2/k m*ndim*(np+1) |
| 497 |
c emission by the surface (st4) w/m**2 m*ndim |
| 498 |
c |
| 499 |
c Notes: |
| 500 |
c |
| 501 |
c (1) Water vapor continuum absorption is included in 540-1380 /cm. |
| 502 |
c (2) Scattering is parameterized for clouds and aerosols. |
| 503 |
c (3) Diffuse cloud and aerosol transmissions are computed |
| 504 |
c from exp(-1.66*tau). |
| 505 |
c (4) If there are no clouds, flx=flc. |
| 506 |
c (5) plevel(1) is the pressure at the top of the model atmosphere, |
| 507 |
c and plevel(np+1) is the surface pressure. |
| 508 |
c (6) Downward flux is positive and upward flux is negative. |
| 509 |
c (7) dfdts is negative because upward flux is defined as negative. |
| 510 |
c (8) For questions and coding errors, contact with Ming-Dah Chou, |
| 511 |
c Code 913, NASA/Goddard Space Flight Center, Greenbelt, MD 20771. |
| 512 |
c Phone: 301-286-4012, Fax: 301-286-1759, |
| 513 |
c e-mail: chou@climate.gsfc.nasa.gov |
| 514 |
c |
| 515 |
c-----parameters defining the size of the pre-computed tables for transmittance |
| 516 |
c calculations using table look-up. |
| 517 |
c |
| 518 |
c "nx" is the number of intervals in pressure |
| 519 |
c "no" is the number of intervals in o3 amount |
| 520 |
c "nc" is the number of intervals in co2 amount |
| 521 |
c "nh" is the number of intervals in h2o amount |
| 522 |
c "nt" is the number of copies to be made from the pre-computed |
| 523 |
c transmittance tables to reduce "memory-bank conflict" |
| 524 |
c in parallel machines and, hence, enhancing the speed of |
| 525 |
c computations using table look-up. |
| 526 |
c If such advantage does not exist, "nt" can be set to 1. |
| 527 |
c*************************************************************************** |
| 528 |
|
| 529 |
cfpp$ expand (h2oexps) |
| 530 |
cfpp$ expand (conexps) |
| 531 |
cfpp$ expand (co2exps) |
| 532 |
cfpp$ expand (n2oexps) |
| 533 |
cfpp$ expand (ch4exps) |
| 534 |
cfpp$ expand (comexps) |
| 535 |
cfpp$ expand (cfcexps) |
| 536 |
cfpp$ expand (b10exps) |
| 537 |
cfpp$ expand (tablup) |
| 538 |
cfpp$ expand (h2okdis) |
| 539 |
cfpp$ expand (co2kdis) |
| 540 |
cfpp$ expand (n2okdis) |
| 541 |
cfpp$ expand (ch4kdis) |
| 542 |
cfpp$ expand (comkdis) |
| 543 |
cfpp$ expand (cfckdis) |
| 544 |
cfpp$ expand (b10kdis) |
| 545 |
|
| 546 |
implicit none |
| 547 |
integer nx,no,nc,nh,nt |
| 548 |
integer i,j,k,ip,iw,it,ib,ik,iq,isb,k1,k2 |
| 549 |
parameter (nx=26,no=21,nc=24,nh=31,nt=7) |
| 550 |
|
| 551 |
c---- input parameters ------ |
| 552 |
|
| 553 |
integer m,n,ndim,np,ict,icb |
| 554 |
real pl(m,ndim,np+1),ta(m,ndim,np),wa(m,ndim,np),oa(m,ndim,np), |
| 555 |
* ts(m,ndim) |
| 556 |
real co2,n2o(np),ch4(np),cfc11,cfc12,cfc22,emiss(m,ndim,10) |
| 557 |
real cwc(m,ndim,np,3),taucl(m,ndim,np,3),reff(m,ndim,np,3), |
| 558 |
* fcld(m,ndim,np) |
| 559 |
real taual(m,ndim,np,10),ssaal(m,ndim,np,10),asyal(m,ndim,np,10) |
| 560 |
logical cldwater,high,trace |
| 561 |
|
| 562 |
c---- output parameters ------ |
| 563 |
|
| 564 |
real flx(m,ndim,np+1),flc(m,ndim,np+1),dfdts(m,ndim,np+1), |
| 565 |
* st4(m,ndim) |
| 566 |
|
| 567 |
c---- static data ----- |
| 568 |
|
| 569 |
real cb(5,10) |
| 570 |
real xkw(9),aw(9),bw(9),pm(9),fkw(6,9),gkw(6,3),xke(9) |
| 571 |
real aib(3,10),awb(4,10),aiw(4,10),aww(4,10),aig(4,10),awg(4,10) |
| 572 |
integer ne(9),mw(9) |
| 573 |
|
| 574 |
c---- temporary arrays ----- |
| 575 |
|
| 576 |
real pa(m,n,np),dt(m,n,np) |
| 577 |
real sh2o(m,n,np+1),swpre(m,n,np+1),swtem(m,n,np+1) |
| 578 |
real sco3(m,n,np+1),scopre(m,n,np+1),scotem(m,n,np+1) |
| 579 |
real dh2o(m,n,np),dcont(m,n,np),dco2(m,n,np),do3(m,n,np) |
| 580 |
real dn2o(m,n,np),dch4(m,n,np) |
| 581 |
real df11(m,n,np),df12(m,n,np),df22(m,n,np) |
| 582 |
real th2o(m,n,6),tcon(m,n,3),tco2(m,n,6,2) |
| 583 |
real tn2o(m,n,4),tch4(m,n,4),tcom(m,n,2) |
| 584 |
real tf11(m,n),tf12(m,n),tf22(m,n) |
| 585 |
real h2oexp(m,n,np,6),conexp(m,n,np,3),co2exp(m,n,np,6,2) |
| 586 |
real n2oexp(m,n,np,4),ch4exp(m,n,np,4),comexp(m,n,np,2) |
| 587 |
real f11exp(m,n,np), f12exp(m,n,np), f22exp(m,n,np) |
| 588 |
real clr(m,n,0:np+1),fclr(m,n) |
| 589 |
real blayer(m,n,0:np+1),dlayer(m,n,np+1),dbs(m,n) |
| 590 |
real clrlw(m,n),clrmd(m,n),clrhi(m,n) |
| 591 |
real cwp(m,n,np,3) |
| 592 |
real trant(m,n),tranal(m,n),transfc(m,n,np+1),trantcr(m,n,np+1) |
| 593 |
real flxu(m,n,np+1),flxd(m,n,np+1),flcu(m,n,np+1),flcd(m,n,np+1) |
| 594 |
real rflx(m,n,np+1),rflc(m,n,np+1) |
| 595 |
|
| 596 |
logical oznbnd,co2bnd,h2otbl,conbnd,n2obnd |
| 597 |
logical ch4bnd,combnd,f11bnd,f12bnd,f22bnd,b10bnd |
| 598 |
|
| 599 |
real c1 (nx,nc,nt),c2 (nx,nc,nt),c3 (nx,nc,nt) |
| 600 |
real o1 (nx,no,nt),o2 (nx,no,nt),o3 (nx,no,nt) |
| 601 |
real h11(nx,nh,nt),h12(nx,nh,nt),h13(nx,nh,nt) |
| 602 |
real h21(nx,nh,nt),h22(nx,nh,nt),h23(nx,nh,nt) |
| 603 |
real h81(nx,nh,nt),h82(nx,nh,nt),h83(nx,nh,nt) |
| 604 |
|
| 605 |
real dp,xx,p1,dwe,dpe,a1,b1,fk1,a2,b2,fk2 |
| 606 |
real w1,w2,w3,g1,g2,g3,ww,gg,ff,taux,reff1,reff2 |
| 607 |
|
| 608 |
c-----the following coefficients (equivalent to table 2 of |
| 609 |
c chou and suarez, 1995) are for computing spectrally |
| 610 |
c integrated planck fluxes using eq. (22) |
| 611 |
|
| 612 |
data cb/ |
| 613 |
1 -2.6844e-1,-8.8994e-2, 1.5676e-3,-2.9349e-6, 2.2233e-9, |
| 614 |
2 3.7315e+1,-7.4758e-1, 4.6151e-3,-6.3260e-6, 3.5647e-9, |
| 615 |
3 3.7187e+1,-3.9085e-1,-6.1072e-4, 1.4534e-5,-1.6863e-8, |
| 616 |
4 -4.1928e+1, 1.0027e+0,-8.5789e-3, 2.9199e-5,-2.5654e-8, |
| 617 |
5 -4.9163e+1, 9.8457e-1,-7.0968e-3, 2.0478e-5,-1.5514e-8, |
| 618 |
6 -4.7107e+1, 8.9130e-1,-5.9735e-3, 1.5596e-5,-9.5911e-9, |
| 619 |
7 -5.4041e+1, 9.5332e-1,-5.7784e-3, 1.2555e-5,-2.9377e-9, |
| 620 |
8 -6.9233e+0,-1.5878e-1, 3.9160e-3,-2.4496e-5, 4.9301e-8, |
| 621 |
9 1.1483e+2,-2.2376e+0, 1.6394e-2,-5.3672e-5, 6.6456e-8, |
| 622 |
* 1.9668e+1,-3.1161e-1, 1.2886e-3, 3.6835e-7,-1.6212e-9/ |
| 623 |
|
| 624 |
c-----xkw are the absorption coefficients for the first |
| 625 |
c k-distribution function due to water vapor line absorption |
| 626 |
c (tables 4 and 7). units are cm**2/g |
| 627 |
|
| 628 |
data xkw / 29.55 , 4.167e-1, 1.328e-2, 5.250e-4, |
| 629 |
* 5.25e-4, 9.369e-3, 4.719e-2, 1.320e-0, 5.250e-4/ |
| 630 |
|
| 631 |
c-----xke are the absorption coefficients for the first |
| 632 |
c k-distribution function due to water vapor continuum absorption |
| 633 |
c (table 6). units are cm**2/g |
| 634 |
|
| 635 |
data xke / 0.00, 0.00, 27.40, 15.8, |
| 636 |
* 9.40, 7.75, 0.0, 0.0, 0.0/ |
| 637 |
|
| 638 |
c-----mw are the ratios between neighboring absorption coefficients |
| 639 |
c for water vapor line absorption (tables 4 and 7). |
| 640 |
|
| 641 |
data mw /6,6,8,6,6,8,9,6,16/ |
| 642 |
|
| 643 |
c-----aw and bw (table 3) are the coefficients for temperature scaling |
| 644 |
c in eq. (25). |
| 645 |
|
| 646 |
data aw/ 0.0021, 0.0140, 0.0167, 0.0302, |
| 647 |
* 0.0307, 0.0195, 0.0152, 0.0008, 0.0096/ |
| 648 |
data bw/ -1.01e-5, 5.57e-5, 8.54e-5, 2.96e-4, |
| 649 |
* 2.86e-4, 1.108e-4, 7.608e-5, -3.52e-6, 1.64e-5/ |
| 650 |
|
| 651 |
data pm/ 1.0, 1.0, 1.0, 1.0, 1.0, 0.77, 0.5, 1.0, 1.0/ |
| 652 |
|
| 653 |
c-----fkw is the planck-weighted k-distribution function due to h2o |
| 654 |
c line absorption given in table 4 of Chou and Suarez (1995). |
| 655 |
c the k-distribution function for the third band, fkw(*,3), is not used |
| 656 |
|
| 657 |
data fkw / 0.2747,0.2717,0.2752,0.1177,0.0352,0.0255, |
| 658 |
2 0.1521,0.3974,0.1778,0.1826,0.0374,0.0527, |
| 659 |
3 6*1.00, |
| 660 |
4 0.4654,0.2991,0.1343,0.0646,0.0226,0.0140, |
| 661 |
5 0.5543,0.2723,0.1131,0.0443,0.0160,0.0000, |
| 662 |
6 0.5955,0.2693,0.0953,0.0335,0.0064,0.0000, |
| 663 |
7 0.1958,0.3469,0.3147,0.1013,0.0365,0.0048, |
| 664 |
8 0.0740,0.1636,0.4174,0.1783,0.1101,0.0566, |
| 665 |
9 0.1437,0.2197,0.3185,0.2351,0.0647,0.0183/ |
| 666 |
|
| 667 |
c-----gkw is the planck-weighted k-distribution function due to h2o |
| 668 |
c line absorption in the 3 subbands (800-720,620-720,540-620 /cm) |
| 669 |
c of band 3 given in table 7. Note that the order of the sub-bands |
| 670 |
c is reversed. |
| 671 |
|
| 672 |
data gkw/ 0.1782,0.0593,0.0215,0.0068,0.0022,0.0000, |
| 673 |
2 0.0923,0.1675,0.0923,0.0187,0.0178,0.0000, |
| 674 |
3 0.0000,0.1083,0.1581,0.0455,0.0274,0.0041/ |
| 675 |
|
| 676 |
c-----ne is the number of terms used in each band to compute water vapor |
| 677 |
c continuum transmittance (table 6). |
| 678 |
|
| 679 |
data ne /0,0,3,1,1,1,0,0,0/ |
| 680 |
c |
| 681 |
c-----coefficients for computing the extinction coefficient |
| 682 |
c for cloud ice particles |
| 683 |
c polynomial fit: y=a1+a2/x**a3; x is in m**2/gm |
| 684 |
c |
| 685 |
data aib / -0.44171, 0.62951, 0.06465, |
| 686 |
2 -0.13727, 0.61291, 0.28962, |
| 687 |
3 -0.01878, 1.67680, 0.79080, |
| 688 |
4 -0.01896, 1.06510, 0.69493, |
| 689 |
5 -0.04788, 0.88178, 0.54492, |
| 690 |
6 -0.02265, 1.57390, 0.76161, |
| 691 |
7 -0.01038, 2.15640, 0.89045, |
| 692 |
8 -0.00450, 2.51370, 0.95989, |
| 693 |
9 -0.00044, 3.15050, 1.03750, |
| 694 |
* -0.02956, 1.44680, 0.71283/ |
| 695 |
c |
| 696 |
c-----coefficients for computing the extinction coefficient |
| 697 |
c for cloud liquid drops |
| 698 |
c polynomial fit: y=a1+a2*x+a3*x**2+a4*x**3; x is in m**2/gm |
| 699 |
c |
| 700 |
data awb / 0.08641, 0.01769, -1.5572e-3, 3.4896e-5, |
| 701 |
2 0.22027, 0.00997, -1.8719e-3, 5.3112e-5, |
| 702 |
3 0.39252, -0.02817, 7.2931e-4, -3.8151e-6, |
| 703 |
4 0.39975, -0.03426, 1.2884e-3, -1.7930e-5, |
| 704 |
5 0.34021, -0.02805, 1.0654e-3, -1.5443e-5, |
| 705 |
6 0.15587, 0.00371, -7.7705e-4, 2.0547e-5, |
| 706 |
7 0.05518, 0.04544, -4.2067e-3, 1.0184e-4, |
| 707 |
8 0.12724, 0.04751, -5.2037e-3, 1.3711e-4, |
| 708 |
9 0.30390, 0.01656, -3.5271e-3, 1.0828e-4, |
| 709 |
* 0.63617, -0.06287, 2.2350e-3, -2.3177e-5/ |
| 710 |
c |
| 711 |
c-----coefficients for computing the single-scattering albedo |
| 712 |
c for cloud ice particles |
| 713 |
c polynomial fit: y=a1+a2*x+a3*x**2+a4*x**3; x is in m**2/gm |
| 714 |
c |
| 715 |
data aiw/ 0.17201, 1.2229e-2, -1.4837e-4, 5.8020e-7, |
| 716 |
2 0.81470, -2.7293e-3, 9.7816e-8, 5.7650e-8, |
| 717 |
3 0.54859, -4.8273e-4, 5.4353e-6, -1.5679e-8, |
| 718 |
4 0.39218, 4.1717e-3, - 4.8869e-5, 1.9144e-7, |
| 719 |
5 0.71773, -3.3640e-3, 1.9713e-5, -3.3189e-8, |
| 720 |
6 0.77345, -5.5228e-3, 4.8379e-5, -1.5151e-7, |
| 721 |
7 0.74975, -5.6604e-3, 5.6475e-5, -1.9664e-7, |
| 722 |
8 0.69011, -4.5348e-3, 4.9322e-5, -1.8255e-7, |
| 723 |
9 0.83963, -6.7253e-3, 6.1900e-5, -2.0862e-7, |
| 724 |
* 0.64860, -2.8692e-3, 2.7656e-5, -8.9680e-8/ |
| 725 |
c |
| 726 |
c-----coefficients for computing the single-scattering albedo |
| 727 |
c for cloud liquid drops |
| 728 |
c polynomial fit: y=a1+a2*x+a3*x**2+a4*x**3; x is in m**2/gm |
| 729 |
c |
| 730 |
data aww/ -7.8566e-2, 8.0875e-2, -4.3403e-3, 8.1341e-5, |
| 731 |
2 -1.3384e-2, 9.3134e-2, -6.0491e-3, 1.3059e-4, |
| 732 |
3 3.7096e-2, 7.3211e-2, -4.4211e-3, 9.2448e-5, |
| 733 |
4 -3.7600e-3, 9.3344e-2, -5.6561e-3, 1.1387e-4, |
| 734 |
5 0.40212, 7.8083e-2, -5.9583e-3, 1.2883e-4, |
| 735 |
6 0.57928, 5.9094e-2, -5.4425e-3, 1.2725e-4, |
| 736 |
7 0.68974, 4.2334e-2, -4.9469e-3, 1.2863e-4, |
| 737 |
8 0.80122, 9.4578e-3, -2.8508e-3, 9.0078e-5, |
| 738 |
9 1.02340, -2.6204e-2, 4.2552e-4, 3.2160e-6, |
| 739 |
* 0.05092, 7.5409e-2, -4.7305e-3, 1.0121e-4/ |
| 740 |
c |
| 741 |
c-----coefficients for computing the asymmetry factor for cloud ice particles |
| 742 |
c polynomial fit: y=a1+a2*x+a3*x**2+a4*x**3; x is in m**2/gm |
| 743 |
c |
| 744 |
data aig / 0.57867, 1.0135e-2, -1.1142e-4, 4.1537e-7, |
| 745 |
2 0.72259, 3.1149e-3, -1.9927e-5, 5.6024e-8, |
| 746 |
3 0.76109, 4.5449e-3, -4.6199e-5, 1.6446e-7, |
| 747 |
4 0.86934, 2.7474e-3, -3.1301e-5, 1.1959e-7, |
| 748 |
5 0.89103, 1.8513e-3, -1.6551e-5, 5.5193e-8, |
| 749 |
6 0.86325, 2.1408e-3, -1.6846e-5, 4.9473e-8, |
| 750 |
7 0.85064, 2.5028e-3, -2.0812e-5, 6.3427e-8, |
| 751 |
8 0.86945, 2.4615e-3, -2.3882e-5, 8.2431e-8, |
| 752 |
9 0.80122, 3.1906e-3, -2.4856e-5, 7.2411e-8, |
| 753 |
* 0.73290, 4.8034e-3, -4.4425e-5, 1.4839e-7/ |
| 754 |
c |
| 755 |
c-----coefficients for computing the asymmetry factor for cloud liquid drops |
| 756 |
c polynomial fit: y=a1+a2*x+a3*x**2+a4*x**3; x is in m**2/gm |
| 757 |
c |
| 758 |
data awg / -0.51930, 0.20290, -1.1747e-2, 2.3868e-4, |
| 759 |
2 -0.22151, 0.19708, -1.2462e-2, 2.6646e-4, |
| 760 |
3 0.14157, 0.14705, -9.5802e-3, 2.0819e-4, |
| 761 |
4 0.41590, 0.10482, -6.9118e-3, 1.5115e-4, |
| 762 |
5 0.55338, 7.7016e-2, -5.2218e-3, 1.1587e-4, |
| 763 |
6 0.61384, 6.4402e-2, -4.6241e-3, 1.0746e-4, |
| 764 |
7 0.67891, 4.8698e-2, -3.7021e-3, 9.1966e-5, |
| 765 |
8 0.78169, 2.0803e-2, -1.4749e-3, 3.9362e-5, |
| 766 |
9 0.93218, -3.3425e-2, 2.9632e-3, -6.9362e-5, |
| 767 |
* 0.01649, 0.16561, -1.0723e-2, 2.3220e-4/ |
| 768 |
c |
| 769 |
c-----include tables used in the table look-up for co2 (band 3), |
| 770 |
c o3 (band 5), and h2o (bands 1, 2, and 7) transmission functions. |
| 771 |
|
| 772 |
logical first |
| 773 |
data first /.true./ |
| 774 |
|
| 775 |
#include "h2o-tran3.h" |
| 776 |
#include "co2-tran3.h" |
| 777 |
#include "o3-tran3.h" |
| 778 |
|
| 779 |
save c1,c2,c3,o1,o2,o3 |
| 780 |
save h11,h12,h13,h21,h22,h23,h81,h82,h83 |
| 781 |
|
| 782 |
if (first) then |
| 783 |
|
| 784 |
c-----tables co2 and h2o are only used with 'high' option |
| 785 |
|
| 786 |
if (high) then |
| 787 |
|
| 788 |
do iw=1,nh |
| 789 |
do ip=1,nx |
| 790 |
h11(ip,iw,1)=1.0-h11(ip,iw,1) |
| 791 |
h21(ip,iw,1)=1.0-h21(ip,iw,1) |
| 792 |
h81(ip,iw,1)=1.0-h81(ip,iw,1) |
| 793 |
enddo |
| 794 |
enddo |
| 795 |
|
| 796 |
do iw=1,nc |
| 797 |
do ip=1,nx |
| 798 |
c1(ip,iw,1)=1.0-c1(ip,iw,1) |
| 799 |
enddo |
| 800 |
enddo |
| 801 |
|
| 802 |
c-----copy tables to enhance the speed of co2 (band 3), o3 (band 5), |
| 803 |
c and h2o (bands 1, 2, and 8 only) transmission calculations |
| 804 |
c using table look-up. |
| 805 |
c-----tables are replicated to avoid memory bank conflicts |
| 806 |
|
| 807 |
do it=2,nt |
| 808 |
do iw=1,nc |
| 809 |
do ip=1,nx |
| 810 |
c1 (ip,iw,it)= c1(ip,iw,1) |
| 811 |
c2 (ip,iw,it)= c2(ip,iw,1) |
| 812 |
c3 (ip,iw,it)= c3(ip,iw,1) |
| 813 |
enddo |
| 814 |
enddo |
| 815 |
do iw=1,nh |
| 816 |
do ip=1,nx |
| 817 |
h11(ip,iw,it)=h11(ip,iw,1) |
| 818 |
h12(ip,iw,it)=h12(ip,iw,1) |
| 819 |
h13(ip,iw,it)=h13(ip,iw,1) |
| 820 |
h21(ip,iw,it)=h21(ip,iw,1) |
| 821 |
h22(ip,iw,it)=h22(ip,iw,1) |
| 822 |
h23(ip,iw,it)=h23(ip,iw,1) |
| 823 |
h81(ip,iw,it)=h81(ip,iw,1) |
| 824 |
h82(ip,iw,it)=h82(ip,iw,1) |
| 825 |
h83(ip,iw,it)=h83(ip,iw,1) |
| 826 |
enddo |
| 827 |
enddo |
| 828 |
enddo |
| 829 |
|
| 830 |
endif |
| 831 |
|
| 832 |
c-----always use table look-up for ozone transmittance |
| 833 |
|
| 834 |
do iw=1,no |
| 835 |
do ip=1,nx |
| 836 |
o1(ip,iw,1)=1.0-o1(ip,iw,1) |
| 837 |
enddo |
| 838 |
enddo |
| 839 |
|
| 840 |
do it=2,nt |
| 841 |
do iw=1,no |
| 842 |
do ip=1,nx |
| 843 |
o1 (ip,iw,it)= o1(ip,iw,1) |
| 844 |
o2 (ip,iw,it)= o2(ip,iw,1) |
| 845 |
o3 (ip,iw,it)= o3(ip,iw,1) |
| 846 |
enddo |
| 847 |
enddo |
| 848 |
enddo |
| 849 |
|
| 850 |
first=.false. |
| 851 |
|
| 852 |
endif |
| 853 |
|
| 854 |
c-----set the pressure at the top of the model atmosphere |
| 855 |
c to 1.0e-4 if it is zero |
| 856 |
|
| 857 |
do j=1,n |
| 858 |
do i=1,m |
| 859 |
if (pl(i,j,1) .eq. 0.0) then |
| 860 |
pl(i,j,1)=1.0e-4 |
| 861 |
endif |
| 862 |
enddo |
| 863 |
enddo |
| 864 |
|
| 865 |
c-----compute layer pressure (pa) and layer temperature minus 250K (dt) |
| 866 |
|
| 867 |
do k=1,np |
| 868 |
do j=1,n |
| 869 |
do i=1,m |
| 870 |
pa(i,j,k)=0.5*(pl(i,j,k)+pl(i,j,k+1)) |
| 871 |
dt(i,j,k)=ta(i,j,k)-250.0 |
| 872 |
enddo |
| 873 |
enddo |
| 874 |
enddo |
| 875 |
|
| 876 |
c-----compute layer absorber amount |
| 877 |
|
| 878 |
c dh2o : water vapor amount (g/cm**2) |
| 879 |
c dcont: scaled water vapor amount for continuum absorption |
| 880 |
c (g/cm**2) |
| 881 |
c dco2 : co2 amount (cm-atm)stp |
| 882 |
c do3 : o3 amount (cm-atm)stp |
| 883 |
c dn2o : n2o amount (cm-atm)stp |
| 884 |
c dch4 : ch4 amount (cm-atm)stp |
| 885 |
c df11 : cfc11 amount (cm-atm)stp |
| 886 |
c df12 : cfc12 amount (cm-atm)stp |
| 887 |
c df22 : cfc22 amount (cm-atm)stp |
| 888 |
c the factor 1.02 is equal to 1000/980 |
| 889 |
c factors 789 and 476 are for unit conversion |
| 890 |
c the factor 0.001618 is equal to 1.02/(.622*1013.25) |
| 891 |
c the factor 6.081 is equal to 1800/296 |
| 892 |
|
| 893 |
|
| 894 |
do k=1,np |
| 895 |
do j=1,n |
| 896 |
do i=1,m |
| 897 |
|
| 898 |
dp = pl(i,j,k+1)-pl(i,j,k) |
| 899 |
dh2o (i,j,k) = 1.02*wa(i,j,k)*dp+1.e-10 |
| 900 |
do3 (i,j,k) = 476.*oa(i,j,k)*dp+1.e-10 |
| 901 |
dco2 (i,j,k) = 789.*co2*dp+1.e-10 |
| 902 |
dch4 (i,j,k) = 789.*ch4(k)*dp+1.e-10 |
| 903 |
dn2o (i,j,k) = 789.*n2o(k)*dp+1.e-10 |
| 904 |
df11 (i,j,k) = 789.*cfc11*dp+1.e-10 |
| 905 |
df12 (i,j,k) = 789.*cfc12*dp+1.e-10 |
| 906 |
df22 (i,j,k) = 789.*cfc22*dp+1.e-10 |
| 907 |
|
| 908 |
c-----compute scaled water vapor amount for h2o continuum absorption |
| 909 |
c following eq. (43). |
| 910 |
|
| 911 |
xx=pa(i,j,k)*0.001618*wa(i,j,k)*wa(i,j,k)*dp |
| 912 |
dcont(i,j,k) = xx*exp(1800./ta(i,j,k)-6.081)+1.e-10 |
| 913 |
|
| 914 |
enddo |
| 915 |
enddo |
| 916 |
enddo |
| 917 |
|
| 918 |
c-----compute column-integrated h2o amoumt, h2o-weighted pressure |
| 919 |
c and temperature. it follows eqs. (37) and (38). |
| 920 |
|
| 921 |
if (high) then |
| 922 |
call column(m,n,np,pa,dt,dh2o,sh2o,swpre,swtem) |
| 923 |
endif |
| 924 |
|
| 925 |
c-----compute layer cloud water amount (gm/m**2) |
| 926 |
c index is 1 for ice, 2 for waterdrops and 3 for raindrops. |
| 927 |
c Rain optical thickness is 0.00307 /(gm/m**2). |
| 928 |
c It is for a specific drop size distribution provided by Q. Fu. |
| 929 |
|
| 930 |
if (cldwater) then |
| 931 |
do k=1,np |
| 932 |
do j=1,n |
| 933 |
do i=1,m |
| 934 |
dp =pl(i,j,k+1)-pl(i,j,k) |
| 935 |
cwp(i,j,k,1)=1.02*10000.0*cwc(i,j,k,1)*dp |
| 936 |
cwp(i,j,k,2)=1.02*10000.0*cwc(i,j,k,2)*dp |
| 937 |
cwp(i,j,k,3)=1.02*10000.0*cwc(i,j,k,3)*dp |
| 938 |
taucl(i,j,k,3)=0.00307*cwp(i,j,k,3) |
| 939 |
enddo |
| 940 |
enddo |
| 941 |
enddo |
| 942 |
endif |
| 943 |
|
| 944 |
c-----the surface (np+1) is treated as a layer filled with black clouds. |
| 945 |
c clr is the equivalent clear fraction of a layer |
| 946 |
c transfc is the transmttance between the surface and a pressure level. |
| 947 |
c trantcr is the clear-sky transmttance between the surface and a |
| 948 |
c pressure level. |
| 949 |
|
| 950 |
do j=1,n |
| 951 |
do i=1,m |
| 952 |
clr(i,j,0) = 1.0 |
| 953 |
clr(i,j,np+1) = 0.0 |
| 954 |
st4(i,j) = 0.0 |
| 955 |
transfc(i,j,np+1)=1.0 |
| 956 |
trantcr(i,j,np+1)=1.0 |
| 957 |
enddo |
| 958 |
enddo |
| 959 |
|
| 960 |
c-----initialize fluxes |
| 961 |
|
| 962 |
do k=1,np+1 |
| 963 |
do j=1,n |
| 964 |
do i=1,m |
| 965 |
flx(i,j,k) = 0.0 |
| 966 |
flc(i,j,k) = 0.0 |
| 967 |
dfdts(i,j,k)= 0.0 |
| 968 |
rflx(i,j,k) = 0.0 |
| 969 |
rflc(i,j,k) = 0.0 |
| 970 |
enddo |
| 971 |
enddo |
| 972 |
enddo |
| 973 |
|
| 974 |
c-----integration over spectral bands |
| 975 |
|
| 976 |
do 1000 ib=1,10 |
| 977 |
|
| 978 |
c-----if h2otbl, compute h2o (line) transmittance using table look-up. |
| 979 |
c if conbnd, compute h2o (continuum) transmittance in bands 3-6. |
| 980 |
c if co2bnd, compute co2 transmittance in band 3. |
| 981 |
c if oznbnd, compute o3 transmittance in band 5. |
| 982 |
c if n2obnd, compute n2o transmittance in bands 6 and 7. |
| 983 |
c if ch4bnd, compute ch4 transmittance in bands 6 and 7. |
| 984 |
c if combnd, compute co2-minor transmittance in bands 4 and 5. |
| 985 |
c if f11bnd, compute cfc11 transmittance in bands 4 and 5. |
| 986 |
c if f12bnd, compute cfc12 transmittance in bands 4 and 6. |
| 987 |
c if f22bnd, compute cfc22 transmittance in bands 4 and 6. |
| 988 |
c if b10bnd, compute flux reduction due to n2o in band 10. |
| 989 |
|
| 990 |
h2otbl=high.and.(ib.eq.1.or.ib.eq.2.or.ib.eq.8) |
| 991 |
conbnd=ib.ge.3.and.ib.le.6 |
| 992 |
co2bnd=ib.eq.3 |
| 993 |
oznbnd=ib.eq.5 |
| 994 |
n2obnd=ib.eq.6.or.ib.eq.7 |
| 995 |
ch4bnd=ib.eq.6.or.ib.eq.7 |
| 996 |
combnd=ib.eq.4.or.ib.eq.5 |
| 997 |
f11bnd=ib.eq.4.or.ib.eq.5 |
| 998 |
f12bnd=ib.eq.4.or.ib.eq.6 |
| 999 |
f22bnd=ib.eq.4.or.ib.eq.6 |
| 1000 |
b10bnd=ib.eq.10 |
| 1001 |
|
| 1002 |
c-----blayer is the spectrally integrated planck flux of the mean layer |
| 1003 |
c temperature derived from eq. (22) |
| 1004 |
c the fitting for the planck flux is valid in the range 160-345 K. |
| 1005 |
|
| 1006 |
do k=1,np |
| 1007 |
do j=1,n |
| 1008 |
do i=1,m |
| 1009 |
blayer(i,j,k)=ta(i,j,k)*(ta(i,j,k)*(ta(i,j,k) |
| 1010 |
* *(ta(i,j,k)*cb(5,ib)+cb(4,ib))+cb(3,ib)) |
| 1011 |
* +cb(2,ib))+cb(1,ib) |
| 1012 |
enddo |
| 1013 |
enddo |
| 1014 |
enddo |
| 1015 |
|
| 1016 |
c-----the earth's surface, with an index "np+1", is treated as a layer |
| 1017 |
|
| 1018 |
do j=1,n |
| 1019 |
do i=1,m |
| 1020 |
blayer(i,j,0) = 0.0 |
| 1021 |
blayer(i,j,np+1)= ( ts(i,j)*(ts(i,j)*(ts(i,j) |
| 1022 |
* *(ts(i,j)*cb(5,ib)+cb(4,ib))+cb(3,ib)) |
| 1023 |
* +cb(2,ib))+cb(1,ib) )*emiss(i,j,ib) |
| 1024 |
|
| 1025 |
c-----dbs is the derivative of the surface emission with respect to |
| 1026 |
c surface temperature (eq. 59). |
| 1027 |
|
| 1028 |
dbs(i,j)=(ts(i,j)*(ts(i,j)*(ts(i,j)*4.*cb(5,ib) |
| 1029 |
* +3.*cb(4,ib))+2.*cb(3,ib))+cb(2,ib))*emiss(i,j,ib) |
| 1030 |
|
| 1031 |
enddo |
| 1032 |
enddo |
| 1033 |
|
| 1034 |
do k=1,np+1 |
| 1035 |
do j=1,n |
| 1036 |
do i=1,m |
| 1037 |
dlayer(i,j,k)=blayer(i,j,k-1)-blayer(i,j,k) |
| 1038 |
enddo |
| 1039 |
enddo |
| 1040 |
enddo |
| 1041 |
|
| 1042 |
c-----compute column-integrated absorber amoumt, absorber-weighted |
| 1043 |
c pressure and temperature for co2 (band 3) and o3 (band 5). |
| 1044 |
c it follows eqs. (37) and (38). |
| 1045 |
|
| 1046 |
c-----this is in the band loop to save storage |
| 1047 |
|
| 1048 |
if (high .and. co2bnd) then |
| 1049 |
call column(m,n,np,pa,dt,dco2,sco3,scopre,scotem) |
| 1050 |
endif |
| 1051 |
|
| 1052 |
if (oznbnd) then |
| 1053 |
call column(m,n,np,pa,dt,do3,sco3,scopre,scotem) |
| 1054 |
endif |
| 1055 |
|
| 1056 |
c-----compute cloud optical thickness |
| 1057 |
|
| 1058 |
if (cldwater) then |
| 1059 |
do k= 1, np |
| 1060 |
do j= 1, n |
| 1061 |
do i= 1, m |
| 1062 |
taucl(i,j,k,1)=cwp(i,j,k,1)*(aib(1,ib)+aib(2,ib)/ |
| 1063 |
* reff(i,j,k,1)**aib(3,ib)) |
| 1064 |
taucl(i,j,k,2)=cwp(i,j,k,2)*(awb(1,ib)+(awb(2,ib)+(awb(3,ib) |
| 1065 |
* +awb(4,ib)*reff(i,j,k,2))*reff(i,j,k,2))*reff(i,j,k,2)) |
| 1066 |
enddo |
| 1067 |
enddo |
| 1068 |
enddo |
| 1069 |
endif |
| 1070 |
|
| 1071 |
c-----compute cloud single-scattering albedo and asymmetry factor for |
| 1072 |
c a mixture of ice particles, liquid drops, and rain drops |
| 1073 |
c single-scattering albedo and asymmetry factor of rain are set |
| 1074 |
c to 0.54 and 0.95, respectively. |
| 1075 |
|
| 1076 |
do k= 1, np |
| 1077 |
do j= 1, n |
| 1078 |
do i= 1, m |
| 1079 |
|
| 1080 |
clr(i,j,k) = 1.0 |
| 1081 |
taux=taucl(i,j,k,1)+taucl(i,j,k,2)+taucl(i,j,k,3) |
| 1082 |
|
| 1083 |
if (taux.gt.0.02 .and. fcld(i,j,k).gt.0.01) then |
| 1084 |
|
| 1085 |
reff1=min(reff(i,j,k,1),130.) |
| 1086 |
reff2=min(reff(i,j,k,2),20.0) |
| 1087 |
|
| 1088 |
w1=taucl(i,j,k,1)*(aiw(1,ib)+(aiw(2,ib)+(aiw(3,ib) |
| 1089 |
* +aiw(4,ib)*reff1)*reff1)*reff1) |
| 1090 |
w2=taucl(i,j,k,2)*(aww(1,ib)+(aww(2,ib)+(aww(3,ib) |
| 1091 |
* +aww(4,ib)*reff2)*reff2)*reff2) |
| 1092 |
w3=taucl(i,j,k,3)*0.54 |
| 1093 |
ww=(w1+w2+w3)/taux |
| 1094 |
|
| 1095 |
g1=w1*(aig(1,ib)+(aig(2,ib)+(aig(3,ib) |
| 1096 |
* +aig(4,ib)*reff1)*reff1)*reff1) |
| 1097 |
g2=w2*(awg(1,ib)+(awg(2,ib)+(awg(3,ib) |
| 1098 |
* +awg(4,ib)*reff2)*reff2)*reff2) |
| 1099 |
g3=w3*0.95 |
| 1100 |
|
| 1101 |
gg=(g1+g2+g3)/(w1+w2+w3) |
| 1102 |
|
| 1103 |
c-----parameterization of LW scattering |
| 1104 |
c compute forward-scattered fraction and scale optical thickness |
| 1105 |
|
| 1106 |
ff=0.5+(0.3739+(0.0076+0.1185*gg)*gg)*gg |
| 1107 |
taux=taux*(1.-ww*ff) |
| 1108 |
|
| 1109 |
c-----compute equivalent cloud-free fraction, clr, for each layer |
| 1110 |
c the cloud diffuse transmittance is approximated by using |
| 1111 |
c a diffusivity factor of 1.66. |
| 1112 |
|
| 1113 |
clr(i,j,k)=1.0-(fcld(i,j,k)*(1.0-exp(-1.66*taux))) |
| 1114 |
|
| 1115 |
endif |
| 1116 |
|
| 1117 |
enddo |
| 1118 |
enddo |
| 1119 |
enddo |
| 1120 |
|
| 1121 |
c-----compute the exponential terms (eq. 32) at each layer due to |
| 1122 |
c water vapor line absorption when k-distribution is used |
| 1123 |
|
| 1124 |
if (.not.h2otbl .and. .not.b10bnd) then |
| 1125 |
call h2oexps(ib,m,n,np,dh2o,pa,dt,xkw,aw,bw,pm,mw,h2oexp) |
| 1126 |
endif |
| 1127 |
|
| 1128 |
c-----compute the exponential terms (eq. 46) at each layer due to |
| 1129 |
c water vapor continuum absorption |
| 1130 |
|
| 1131 |
if (conbnd) then |
| 1132 |
call conexps(ib,m,n,np,dcont,xke,conexp) |
| 1133 |
endif |
| 1134 |
|
| 1135 |
c-----compute the exponential terms (eq. 32) at each layer due to |
| 1136 |
c co2 absorption |
| 1137 |
|
| 1138 |
if (.not.high .and. co2bnd) then |
| 1139 |
call co2exps(m,n,np,dco2,pa,dt,co2exp) |
| 1140 |
endif |
| 1141 |
|
| 1142 |
c***** for trace gases ***** |
| 1143 |
|
| 1144 |
if (trace) then |
| 1145 |
|
| 1146 |
c-----compute the exponential terms at each layer due to n2o absorption |
| 1147 |
|
| 1148 |
if (n2obnd) then |
| 1149 |
call n2oexps(ib,m,n,np,dn2o,pa,dt,n2oexp) |
| 1150 |
endif |
| 1151 |
|
| 1152 |
c-----compute the exponential terms at each layer due to ch4 absorption |
| 1153 |
|
| 1154 |
if (ch4bnd) then |
| 1155 |
call ch4exps(ib,m,n,np,dch4,pa,dt,ch4exp) |
| 1156 |
endif |
| 1157 |
|
| 1158 |
c-----compute the exponential terms due to co2 minor absorption |
| 1159 |
|
| 1160 |
if (combnd) then |
| 1161 |
call comexps(ib,m,n,np,dco2,dt,comexp) |
| 1162 |
endif |
| 1163 |
|
| 1164 |
c-----compute the exponential terms due to cfc11 absorption |
| 1165 |
|
| 1166 |
if (f11bnd) then |
| 1167 |
a1 = 1.26610e-3 |
| 1168 |
b1 = 3.55940e-6 |
| 1169 |
fk1 = 1.89736e+1 |
| 1170 |
a2 = 8.19370e-4 |
| 1171 |
b2 = 4.67810e-6 |
| 1172 |
fk2 = 1.01487e+1 |
| 1173 |
call cfcexps(ib,m,n,np,a1,b1,fk1,a2,b2,fk2,df11,dt,f11exp) |
| 1174 |
endif |
| 1175 |
|
| 1176 |
c-----compute the exponential terms due to cfc12 absorption |
| 1177 |
|
| 1178 |
if (f12bnd) then |
| 1179 |
a1 = 8.77370e-4 |
| 1180 |
b1 =-5.88440e-6 |
| 1181 |
fk1 = 1.58104e+1 |
| 1182 |
a2 = 8.62000e-4 |
| 1183 |
b2 =-4.22500e-6 |
| 1184 |
fk2 = 3.70107e+1 |
| 1185 |
call cfcexps(ib,m,n,np,a1,b1,fk1,a2,b2,fk2,df12,dt,f12exp) |
| 1186 |
endif |
| 1187 |
|
| 1188 |
c-----compute the exponential terms due to cfc22 absorption |
| 1189 |
|
| 1190 |
if (f22bnd) then |
| 1191 |
a1 = 9.65130e-4 |
| 1192 |
b1 = 1.31280e-5 |
| 1193 |
fk1 = 6.18536e+0 |
| 1194 |
a2 =-3.00010e-5 |
| 1195 |
b2 = 5.25010e-7 |
| 1196 |
fk2 = 3.27912e+1 |
| 1197 |
call cfcexps(ib,m,n,np,a1,b1,fk1,a2,b2,fk2,df22,dt,f22exp) |
| 1198 |
endif |
| 1199 |
|
| 1200 |
c-----compute the exponential terms at each layer in band 10 due to |
| 1201 |
c h2o line and continuum, co2, and n2o absorption |
| 1202 |
|
| 1203 |
if (b10bnd) then |
| 1204 |
call b10exps(m,n,np,dh2o,dcont,dco2,dn2o,pa,dt |
| 1205 |
* ,h2oexp,conexp,co2exp,n2oexp) |
| 1206 |
endif |
| 1207 |
|
| 1208 |
endif |
| 1209 |
|
| 1210 |
c-----compute transmittances for regions between levels k1 and k2 |
| 1211 |
c and update the fluxes at the two levels. |
| 1212 |
|
| 1213 |
|
| 1214 |
c-----initialize fluxes |
| 1215 |
|
| 1216 |
do k=1,np+1 |
| 1217 |
do j=1,n |
| 1218 |
do i=1,m |
| 1219 |
flxu(i,j,k) = 0.0 |
| 1220 |
flxd(i,j,k) = 0.0 |
| 1221 |
flcu(i,j,k) = 0.0 |
| 1222 |
flcd(i,j,k) = 0.0 |
| 1223 |
enddo |
| 1224 |
enddo |
| 1225 |
enddo |
| 1226 |
|
| 1227 |
|
| 1228 |
do 2000 k1=1,np |
| 1229 |
|
| 1230 |
c-----initialize fclr, th2o, tcon, tco2, and tranal |
| 1231 |
c fclr is the clear fraction of the line-of-sight |
| 1232 |
c clrlw, clrmd, and clrhi are the clear-sky fractions of the |
| 1233 |
c low, middle, and high troposphere, respectively |
| 1234 |
c tranal is the aerosol transmission function |
| 1235 |
|
| 1236 |
do j=1,n |
| 1237 |
do i=1,m |
| 1238 |
fclr(i,j) = 1.0 |
| 1239 |
clrlw(i,j) = 1.0 |
| 1240 |
clrmd(i,j) = 1.0 |
| 1241 |
clrhi(i,j) = 1.0 |
| 1242 |
tranal(i,j)= 1.0 |
| 1243 |
enddo |
| 1244 |
enddo |
| 1245 |
|
| 1246 |
c-----for h2o line transmission |
| 1247 |
|
| 1248 |
if (.not. h2otbl) then |
| 1249 |
do ik=1,6 |
| 1250 |
do j=1,n |
| 1251 |
do i=1,m |
| 1252 |
th2o(i,j,ik)=1.0 |
| 1253 |
enddo |
| 1254 |
enddo |
| 1255 |
enddo |
| 1256 |
endif |
| 1257 |
|
| 1258 |
c-----for h2o continuum transmission |
| 1259 |
|
| 1260 |
if (conbnd) then |
| 1261 |
do iq=1,3 |
| 1262 |
do j=1,n |
| 1263 |
do i=1,m |
| 1264 |
tcon(i,j,iq)=1.0 |
| 1265 |
enddo |
| 1266 |
enddo |
| 1267 |
enddo |
| 1268 |
endif |
| 1269 |
|
| 1270 |
c-----for co2 transmission using k-distribution method. |
| 1271 |
c band 3 is divided into 3 sub-bands, but sub-bands 3a and 3c |
| 1272 |
c are combined in computing the co2 transmittance. |
| 1273 |
|
| 1274 |
if (.not.high .and. co2bnd) then |
| 1275 |
do isb=1,2 |
| 1276 |
do ik=1,6 |
| 1277 |
do j=1,n |
| 1278 |
do i=1,m |
| 1279 |
tco2(i,j,ik,isb)=1.0 |
| 1280 |
enddo |
| 1281 |
enddo |
| 1282 |
enddo |
| 1283 |
enddo |
| 1284 |
endif |
| 1285 |
|
| 1286 |
c***** for trace gases ***** |
| 1287 |
|
| 1288 |
if (trace) then |
| 1289 |
|
| 1290 |
c-----for n2o transmission using k-distribution method. |
| 1291 |
|
| 1292 |
if (n2obnd) then |
| 1293 |
do ik=1,4 |
| 1294 |
do j=1,n |
| 1295 |
do i=1,m |
| 1296 |
tn2o(i,j,ik)=1.0 |
| 1297 |
enddo |
| 1298 |
enddo |
| 1299 |
enddo |
| 1300 |
endif |
| 1301 |
|
| 1302 |
c-----for ch4 transmission using k-distribution method. |
| 1303 |
|
| 1304 |
if (ch4bnd) then |
| 1305 |
do ik=1,4 |
| 1306 |
do j=1,n |
| 1307 |
do i=1,m |
| 1308 |
tch4(i,j,ik)=1.0 |
| 1309 |
enddo |
| 1310 |
enddo |
| 1311 |
enddo |
| 1312 |
endif |
| 1313 |
|
| 1314 |
c-----for co2-minor transmission using k-distribution method. |
| 1315 |
|
| 1316 |
if (combnd) then |
| 1317 |
do ik=1,2 |
| 1318 |
do j=1,n |
| 1319 |
do i=1,m |
| 1320 |
tcom(i,j,ik)=1.0 |
| 1321 |
enddo |
| 1322 |
enddo |
| 1323 |
enddo |
| 1324 |
endif |
| 1325 |
|
| 1326 |
c-----for cfc-11 transmission using k-distribution method. |
| 1327 |
|
| 1328 |
if (f11bnd) then |
| 1329 |
do j=1,n |
| 1330 |
do i=1,m |
| 1331 |
tf11(i,j)=1.0 |
| 1332 |
enddo |
| 1333 |
enddo |
| 1334 |
endif |
| 1335 |
|
| 1336 |
c-----for cfc-12 transmission using k-distribution method. |
| 1337 |
|
| 1338 |
if (f12bnd) then |
| 1339 |
do j=1,n |
| 1340 |
do i=1,m |
| 1341 |
tf12(i,j)=1.0 |
| 1342 |
enddo |
| 1343 |
enddo |
| 1344 |
endif |
| 1345 |
|
| 1346 |
c-----for cfc-22 transmission when using k-distribution method. |
| 1347 |
|
| 1348 |
if (f22bnd) then |
| 1349 |
do j=1,n |
| 1350 |
do i=1,m |
| 1351 |
tf22(i,j)=1.0 |
| 1352 |
enddo |
| 1353 |
enddo |
| 1354 |
endif |
| 1355 |
|
| 1356 |
c-----for the transmission in band 10 using k-distribution method. |
| 1357 |
|
| 1358 |
if (b10bnd) then |
| 1359 |
do ik=1,6 |
| 1360 |
do j=1,n |
| 1361 |
do i=1,m |
| 1362 |
th2o(i,j,ik)=1.0 |
| 1363 |
tco2(i,j,ik,1)=1.0 |
| 1364 |
enddo |
| 1365 |
enddo |
| 1366 |
enddo |
| 1367 |
do iq=1,3 |
| 1368 |
do j=1,n |
| 1369 |
do i=1,m |
| 1370 |
tcon(i,j,iq)=1.0 |
| 1371 |
enddo |
| 1372 |
enddo |
| 1373 |
enddo |
| 1374 |
do ik=1,4 |
| 1375 |
do j=1,n |
| 1376 |
do i=1,m |
| 1377 |
tn2o(i,j,ik)=1.0 |
| 1378 |
enddo |
| 1379 |
enddo |
| 1380 |
enddo |
| 1381 |
endif |
| 1382 |
|
| 1383 |
endif |
| 1384 |
|
| 1385 |
c-----loop over the bottom level of the region (k2) |
| 1386 |
|
| 1387 |
do 3000 k2=k1+1,np+1 |
| 1388 |
|
| 1389 |
c-----initialize total transmission function (trant) |
| 1390 |
|
| 1391 |
do j=1,n |
| 1392 |
do i=1,m |
| 1393 |
trant(i,j)=1.0 |
| 1394 |
enddo |
| 1395 |
enddo |
| 1396 |
|
| 1397 |
if (h2otbl) then |
| 1398 |
w1=-8.0 |
| 1399 |
p1=-2.0 |
| 1400 |
dwe=0.3 |
| 1401 |
dpe=0.2 |
| 1402 |
|
| 1403 |
c-----compute water vapor transmittance using table look-up |
| 1404 |
|
| 1405 |
if (ib.eq.1) then |
| 1406 |
call tablup(k1,k2,m,n,np,nx,nh,nt,sh2o,swpre,swtem, |
| 1407 |
* w1,p1,dwe,dpe,h11,h12,h13,trant) |
| 1408 |
|
| 1409 |
endif |
| 1410 |
if (ib.eq.2) then |
| 1411 |
call tablup(k1,k2,m,n,np,nx,nh,nt,sh2o,swpre,swtem, |
| 1412 |
* w1,p1,dwe,dpe,h21,h22,h23,trant) |
| 1413 |
|
| 1414 |
endif |
| 1415 |
if (ib.eq.8) then |
| 1416 |
call tablup(k1,k2,m,n,np,nx,nh,nt,sh2o,swpre,swtem, |
| 1417 |
* w1,p1,dwe,dpe,h81,h82,h83,trant) |
| 1418 |
endif |
| 1419 |
|
| 1420 |
else |
| 1421 |
|
| 1422 |
c-----compute water vapor transmittance using k-distribution |
| 1423 |
|
| 1424 |
if (.not.b10bnd) then |
| 1425 |
call h2okdis(ib,m,n,np,k2-1,fkw,gkw,ne,h2oexp,conexp, |
| 1426 |
* th2o,tcon,trant) |
| 1427 |
endif |
| 1428 |
|
| 1429 |
endif |
| 1430 |
|
| 1431 |
if (co2bnd) then |
| 1432 |
|
| 1433 |
if (high) then |
| 1434 |
|
| 1435 |
c-----compute co2 transmittance using table look-up method |
| 1436 |
|
| 1437 |
w1=-4.0 |
| 1438 |
p1=-2.0 |
| 1439 |
dwe=0.3 |
| 1440 |
dpe=0.2 |
| 1441 |
call tablup(k1,k2,m,n,np,nx,nc,nt,sco3,scopre,scotem, |
| 1442 |
* w1,p1,dwe,dpe,c1,c2,c3,trant) |
| 1443 |
else |
| 1444 |
|
| 1445 |
c-----compute co2 transmittance using k-distribution method |
| 1446 |
call co2kdis(m,n,np,k2-1,co2exp,tco2,trant) |
| 1447 |
|
| 1448 |
endif |
| 1449 |
|
| 1450 |
endif |
| 1451 |
|
| 1452 |
c-----All use table look-up to compute o3 transmittance. |
| 1453 |
|
| 1454 |
if (oznbnd) then |
| 1455 |
w1=-6.0 |
| 1456 |
p1=-2.0 |
| 1457 |
dwe=0.3 |
| 1458 |
dpe=0.2 |
| 1459 |
call tablup(k1,k2,m,n,np,nx,no,nt,sco3,scopre,scotem, |
| 1460 |
* w1,p1,dwe,dpe,o1,o2,o3,trant) |
| 1461 |
endif |
| 1462 |
|
| 1463 |
c***** for trace gases ***** |
| 1464 |
|
| 1465 |
if (trace) then |
| 1466 |
|
| 1467 |
c-----compute n2o transmittance using k-distribution method |
| 1468 |
|
| 1469 |
if (n2obnd) then |
| 1470 |
call n2okdis(ib,m,n,np,k2-1,n2oexp,tn2o,trant) |
| 1471 |
endif |
| 1472 |
|
| 1473 |
c-----compute ch4 transmittance using k-distribution method |
| 1474 |
|
| 1475 |
if (ch4bnd) then |
| 1476 |
call ch4kdis(ib,m,n,np,k2-1,ch4exp,tch4,trant) |
| 1477 |
endif |
| 1478 |
|
| 1479 |
c-----compute co2-minor transmittance using k-distribution method |
| 1480 |
|
| 1481 |
if (combnd) then |
| 1482 |
call comkdis(ib,m,n,np,k2-1,comexp,tcom,trant) |
| 1483 |
endif |
| 1484 |
|
| 1485 |
c-----compute cfc11 transmittance using k-distribution method |
| 1486 |
|
| 1487 |
if (f11bnd) then |
| 1488 |
call cfckdis(m,n,np,k2-1,f11exp,tf11,trant) |
| 1489 |
endif |
| 1490 |
|
| 1491 |
c-----compute cfc12 transmittance using k-distribution method |
| 1492 |
|
| 1493 |
if (f12bnd) then |
| 1494 |
call cfckdis(m,n,np,k2-1,f12exp,tf12,trant) |
| 1495 |
endif |
| 1496 |
|
| 1497 |
c-----compute cfc22 transmittance using k-distribution method |
| 1498 |
|
| 1499 |
if (f22bnd) then |
| 1500 |
call cfckdis(m,n,np,k2-1,f22exp,tf22,trant) |
| 1501 |
endif |
| 1502 |
|
| 1503 |
c-----compute transmittance in band 10 using k-distribution method |
| 1504 |
c here, trant is the change in transmittance due to n2o absorption |
| 1505 |
|
| 1506 |
if (b10bnd) then |
| 1507 |
call b10kdis(m,n,np,k2-1,h2oexp,conexp,co2exp,n2oexp |
| 1508 |
* ,th2o,tcon,tco2,tn2o,trant) |
| 1509 |
endif |
| 1510 |
|
| 1511 |
endif |
| 1512 |
c |
| 1513 |
c-----include aerosol effect |
| 1514 |
c |
| 1515 |
do j=1,n |
| 1516 |
do i=1,m |
| 1517 |
ff=0.5+(0.3739+(0.0076+0.1185*asyal(i,j,k2-1,ib)) |
| 1518 |
* *asyal(i,j,k2-1,ib))*asyal(i,j,k2-1,ib) |
| 1519 |
taux=taual(i,j,k2-1,ib)*(1.-ssaal(i,j,k2-1,ib)*ff) |
| 1520 |
tranal(i,j)=tranal(i,j)*exp(-1.66*taux) |
| 1521 |
trant (i,j)=trant(i,j) *tranal(i,j) |
| 1522 |
enddo |
| 1523 |
enddo |
| 1524 |
|
| 1525 |
c-----Identify the clear-sky fractions clrhi, clrmd and clrlw, in the |
| 1526 |
c high, middle and low cloud groups. |
| 1527 |
c fclr is the clear-sky fraction between levels k1 and k2 assuming |
| 1528 |
c the three cloud groups are randomly overlapped. |
| 1529 |
|
| 1530 |
do j=1,n |
| 1531 |
do i=1,m |
| 1532 |
if( k2 .le. ict ) then |
| 1533 |
clrhi(i,j)=min(clr(i,j,k2-1),clrhi(i,j)) |
| 1534 |
elseif( k2 .gt. ict .and. k2 .le. icb ) then |
| 1535 |
clrmd(i,j)=min(clr(i,j,k2-1),clrmd(i,j)) |
| 1536 |
elseif( k2 .gt. icb ) then |
| 1537 |
clrlw(i,j)=min(clr(i,j,k2-1),clrlw(i,j)) |
| 1538 |
endif |
| 1539 |
fclr(i,j)=clrlw(i,j)*clrmd(i,j)*clrhi(i,j) |
| 1540 |
|
| 1541 |
enddo |
| 1542 |
enddo |
| 1543 |
|
| 1544 |
c-----compute upward and downward fluxes (band 1-9). |
| 1545 |
c add "boundary" terms to the net downward flux. |
| 1546 |
c these are the first terms on the right-hand-side of |
| 1547 |
c eqs. (56a) and (56b). downward fluxes are positive. |
| 1548 |
|
| 1549 |
if (.not. b10bnd) then |
| 1550 |
|
| 1551 |
if (k2 .eq. k1+1) then |
| 1552 |
|
| 1553 |
do j=1,n |
| 1554 |
do i=1,m |
| 1555 |
|
| 1556 |
c-----compute upward and downward fluxes for clear-sky situation |
| 1557 |
|
| 1558 |
flcu(i,j,k1)=flcu(i,j,k1)-blayer(i,j,k1) |
| 1559 |
flcd(i,j,k2)=flcd(i,j,k2)+blayer(i,j,k1) |
| 1560 |
|
| 1561 |
c-----compute upward and downward fluxes for all-sky situation |
| 1562 |
|
| 1563 |
flxu(i,j,k1)=flxu(i,j,k1)-blayer(i,j,k1) |
| 1564 |
flxd(i,j,k2)=flxd(i,j,k2)+blayer(i,j,k1) |
| 1565 |
|
| 1566 |
enddo |
| 1567 |
enddo |
| 1568 |
|
| 1569 |
endif |
| 1570 |
|
| 1571 |
c-----add flux components involving the four layers above and below |
| 1572 |
c the levels k1 and k2. it follows eqs. (56a) and (56b). |
| 1573 |
|
| 1574 |
do j=1,n |
| 1575 |
do i=1,m |
| 1576 |
xx=trant(i,j)*dlayer(i,j,k2) |
| 1577 |
flcu(i,j,k1) =flcu(i,j,k1)+xx |
| 1578 |
flxu(i,j,k1) =flxu(i,j,k1)+xx*fclr(i,j) |
| 1579 |
xx=trant(i,j)*dlayer(i,j,k1) |
| 1580 |
flcd(i,j,k2) =flcd(i,j,k2)+xx |
| 1581 |
flxd(i,j,k2) =flxd(i,j,k2)+xx*fclr(i,j) |
| 1582 |
enddo |
| 1583 |
enddo |
| 1584 |
|
| 1585 |
else |
| 1586 |
|
| 1587 |
c-----flux reduction due to n2o in band 10 |
| 1588 |
|
| 1589 |
if (trace) then |
| 1590 |
|
| 1591 |
do j=1,n |
| 1592 |
do i=1,m |
| 1593 |
rflx(i,j,k1) = rflx(i,j,k1)+trant(i,j)*fclr(i,j) |
| 1594 |
* *dlayer(i,j,k2) |
| 1595 |
rflx(i,j,k2) = rflx(i,j,k2)+trant(i,j)*fclr(i,j) |
| 1596 |
* *dlayer(i,j,k1) |
| 1597 |
rflc(i,j,k1) = rflc(i,j,k1)+trant(i,j) |
| 1598 |
* *dlayer(i,j,k2) |
| 1599 |
rflc(i,j,k2) = rflc(i,j,k2)+trant(i,j) |
| 1600 |
* *dlayer(i,j,k1) |
| 1601 |
enddo |
| 1602 |
enddo |
| 1603 |
|
| 1604 |
endif |
| 1605 |
|
| 1606 |
endif |
| 1607 |
|
| 1608 |
3000 continue |
| 1609 |
|
| 1610 |
|
| 1611 |
c-----transmission between level k1 and the surface |
| 1612 |
|
| 1613 |
do j=1,n |
| 1614 |
do i=1,m |
| 1615 |
trantcr(i,j,k1) =trant(i,j) |
| 1616 |
transfc(i,j,k1) =trant(i,j)*fclr(i,j) |
| 1617 |
enddo |
| 1618 |
enddo |
| 1619 |
|
| 1620 |
c-----compute the partial derivative of fluxes with respect to |
| 1621 |
c surface temperature (eq. 59) |
| 1622 |
|
| 1623 |
if (trace .or. (.not. b10bnd) ) then |
| 1624 |
|
| 1625 |
do j=1,n |
| 1626 |
do i=1,m |
| 1627 |
dfdts(i,j,k1) =dfdts(i,j,k1)-dbs(i,j)*transfc(i,j,k1) |
| 1628 |
enddo |
| 1629 |
enddo |
| 1630 |
|
| 1631 |
endif |
| 1632 |
|
| 1633 |
2000 continue |
| 1634 |
|
| 1635 |
if (.not. b10bnd) then |
| 1636 |
|
| 1637 |
c-----add contribution from the surface to the flux terms at the surface |
| 1638 |
|
| 1639 |
do j=1,n |
| 1640 |
do i=1,m |
| 1641 |
flcu(i,j,np+1)=flcu(i,j,np+1)-blayer(i,j,np+1) |
| 1642 |
flxu(i,j,np+1)=flxu(i,j,np+1)-blayer(i,j,np+1) |
| 1643 |
st4(i,j)=st4(i,j)-blayer(i,j,np+1) |
| 1644 |
dfdts(i,j,np+1)=dfdts(i,j,np+1)-dbs(i,j) |
| 1645 |
enddo |
| 1646 |
enddo |
| 1647 |
|
| 1648 |
c-----add the flux component reflected by the surface |
| 1649 |
c note: upward flux is negative |
| 1650 |
|
| 1651 |
do k=1, np+1 |
| 1652 |
do j=1,n |
| 1653 |
do i=1,m |
| 1654 |
flcu(i,j,k)=flcu(i,j,k)- |
| 1655 |
* flcd(i,j,np+1)*trantcr(i,j,k)*(1.-emiss(i,j,ib)) |
| 1656 |
flxu(i,j,k)=flxu(i,j,k)- |
| 1657 |
* flxd(i,j,np+1)*transfc(i,j,k)*(1.-emiss(i,j,ib)) |
| 1658 |
enddo |
| 1659 |
enddo |
| 1660 |
enddo |
| 1661 |
|
| 1662 |
endif |
| 1663 |
|
| 1664 |
c-----summation of fluxes over spectral bands |
| 1665 |
|
| 1666 |
do k=1,np+1 |
| 1667 |
do j=1,n |
| 1668 |
do i=1,m |
| 1669 |
flc(i,j,k)=flc(i,j,k)+flcd(i,j,k)+flcu(i,j,k) |
| 1670 |
flx(i,j,k)=flx(i,j,k)+flxd(i,j,k)+flxu(i,j,k) |
| 1671 |
enddo |
| 1672 |
enddo |
| 1673 |
enddo |
| 1674 |
|
| 1675 |
1000 continue |
| 1676 |
|
| 1677 |
c-----adjust fluxes due to n2o absorption in band 10 |
| 1678 |
|
| 1679 |
do k=1,np+1 |
| 1680 |
do j=1,n |
| 1681 |
do i=1,m |
| 1682 |
flc(i,j,k)=flc(i,j,k)+rflc(i,j,k) |
| 1683 |
flx(i,j,k)=flx(i,j,k)+rflx(i,j,k) |
| 1684 |
enddo |
| 1685 |
enddo |
| 1686 |
enddo |
| 1687 |
|
| 1688 |
return |
| 1689 |
end |
| 1690 |
c*********************************************************************** |
| 1691 |
subroutine column (m,n,np,pa,dt,sabs0,sabs,spre,stem) |
| 1692 |
c*********************************************************************** |
| 1693 |
c-----compute column-integrated (from top of the model atmosphere) |
| 1694 |
c absorber amount (sabs), absorber-weighted pressure (spre) and |
| 1695 |
c temperature (stem). |
| 1696 |
c computations of spre and stem follows eqs. (37) and (38). |
| 1697 |
c |
| 1698 |
c--- input parameters |
| 1699 |
c number of soundings in zonal direction (m) |
| 1700 |
c number of soundings in meridional direction (n) |
| 1701 |
c number of atmospheric layers (np) |
| 1702 |
c layer pressure (pa) |
| 1703 |
c layer temperature minus 250K (dt) |
| 1704 |
c layer absorber amount (sabs0) |
| 1705 |
c |
| 1706 |
c--- output parameters |
| 1707 |
c column-integrated absorber amount (sabs) |
| 1708 |
c column absorber-weighted pressure (spre) |
| 1709 |
c column absorber-weighted temperature (stem) |
| 1710 |
c |
| 1711 |
c--- units of pa and dt are mb and k, respectively. |
| 1712 |
c units of sabs are g/cm**2 for water vapor and (cm-atm)stp |
| 1713 |
c for co2 and o3 |
| 1714 |
c*********************************************************************** |
| 1715 |
implicit none |
| 1716 |
integer m,n,np,i,j,k |
| 1717 |
|
| 1718 |
c---- input parameters ----- |
| 1719 |
|
| 1720 |
real pa(m,n,np),dt(m,n,np),sabs0(m,n,np) |
| 1721 |
|
| 1722 |
c---- output parameters ----- |
| 1723 |
|
| 1724 |
real sabs(m,n,np+1),spre(m,n,np+1),stem(m,n,np+1) |
| 1725 |
|
| 1726 |
c********************************************************************* |
| 1727 |
do j=1,n |
| 1728 |
do i=1,m |
| 1729 |
sabs(i,j,1)=0.0 |
| 1730 |
spre(i,j,1)=0.0 |
| 1731 |
stem(i,j,1)=0.0 |
| 1732 |
enddo |
| 1733 |
enddo |
| 1734 |
|
| 1735 |
do k=1,np |
| 1736 |
do j=1,n |
| 1737 |
do i=1,m |
| 1738 |
sabs(i,j,k+1)=sabs(i,j,k)+sabs0(i,j,k) |
| 1739 |
spre(i,j,k+1)=spre(i,j,k)+pa(i,j,k)*sabs0(i,j,k) |
| 1740 |
stem(i,j,k+1)=stem(i,j,k)+dt(i,j,k)*sabs0(i,j,k) |
| 1741 |
enddo |
| 1742 |
enddo |
| 1743 |
enddo |
| 1744 |
|
| 1745 |
return |
| 1746 |
end |
| 1747 |
c********************************************************************** |
| 1748 |
subroutine h2oexps(ib,m,n,np,dh2o,pa,dt,xkw,aw,bw,pm,mw,h2oexp) |
| 1749 |
c********************************************************************** |
| 1750 |
c compute exponentials for water vapor line absorption |
| 1751 |
c in individual layers. |
| 1752 |
c |
| 1753 |
c---- input parameters |
| 1754 |
c spectral band (ib) |
| 1755 |
c number of grid intervals in zonal direction (m) |
| 1756 |
c number of grid intervals in meridional direction (n) |
| 1757 |
c number of layers (np) |
| 1758 |
c layer water vapor amount for line absorption (dh2o) |
| 1759 |
c layer pressure (pa) |
| 1760 |
c layer temperature minus 250K (dt) |
| 1761 |
c absorption coefficients for the first k-distribution |
| 1762 |
c function due to h2o line absorption (xkw) |
| 1763 |
c coefficients for the temperature and pressure scaling (aw,bw,pm) |
| 1764 |
c ratios between neighboring absorption coefficients for |
| 1765 |
c h2o line absorption (mw) |
| 1766 |
c |
| 1767 |
c---- output parameters |
| 1768 |
c 6 exponentials for each layer (h2oexp) |
| 1769 |
c********************************************************************** |
| 1770 |
implicit none |
| 1771 |
integer ib,m,n,np,i,j,k,ik |
| 1772 |
|
| 1773 |
c---- input parameters ------ |
| 1774 |
|
| 1775 |
real dh2o(m,n,np),pa(m,n,np),dt(m,n,np) |
| 1776 |
|
| 1777 |
c---- output parameters ----- |
| 1778 |
|
| 1779 |
real h2oexp(m,n,np,6) |
| 1780 |
|
| 1781 |
c---- static data ----- |
| 1782 |
|
| 1783 |
integer mw(9) |
| 1784 |
real xkw(9),aw(9),bw(9),pm(9) |
| 1785 |
|
| 1786 |
c---- temporary arrays ----- |
| 1787 |
|
| 1788 |
real xh,xh1 |
| 1789 |
|
| 1790 |
c********************************************************************** |
| 1791 |
c note that the 3 sub-bands in band 3 use the same set of xkw, aw, |
| 1792 |
c and bw, therefore, h2oexp for these sub-bands are identical. |
| 1793 |
c********************************************************************** |
| 1794 |
|
| 1795 |
do k=1,np |
| 1796 |
do j=1,n |
| 1797 |
do i=1,m |
| 1798 |
|
| 1799 |
c-----xh is the scaled water vapor amount for line absorption |
| 1800 |
c computed from (27) |
| 1801 |
|
| 1802 |
xh = dh2o(i,j,k)*(pa(i,j,k)/500.)**pm(ib) |
| 1803 |
1 * ( 1.+(aw(ib)+bw(ib)* dt(i,j,k))*dt(i,j,k) ) |
| 1804 |
|
| 1805 |
c-----h2oexp is the water vapor transmittance of the layer k |
| 1806 |
c due to line absorption |
| 1807 |
|
| 1808 |
h2oexp(i,j,k,1) = exp(-xh*xkw(ib)) |
| 1809 |
|
| 1810 |
enddo |
| 1811 |
enddo |
| 1812 |
enddo |
| 1813 |
|
| 1814 |
do ik=2,6 |
| 1815 |
|
| 1816 |
if (mw(ib).eq.6) then |
| 1817 |
|
| 1818 |
do k=1,np |
| 1819 |
do j=1,n |
| 1820 |
do i=1,m |
| 1821 |
xh = h2oexp(i,j,k,ik-1)*h2oexp(i,j,k,ik-1) |
| 1822 |
h2oexp(i,j,k,ik) = xh*xh*xh |
| 1823 |
enddo |
| 1824 |
enddo |
| 1825 |
enddo |
| 1826 |
|
| 1827 |
elseif (mw(ib).eq.8) then |
| 1828 |
|
| 1829 |
do k=1,np |
| 1830 |
do j=1,n |
| 1831 |
do i=1,m |
| 1832 |
xh = h2oexp(i,j,k,ik-1)*h2oexp(i,j,k,ik-1) |
| 1833 |
xh = xh*xh |
| 1834 |
h2oexp(i,j,k,ik) = xh*xh |
| 1835 |
enddo |
| 1836 |
enddo |
| 1837 |
enddo |
| 1838 |
|
| 1839 |
elseif (mw(ib).eq.9) then |
| 1840 |
|
| 1841 |
do k=1,np |
| 1842 |
do j=1,n |
| 1843 |
do i=1,m |
| 1844 |
xh=h2oexp(i,j,k,ik-1)*h2oexp(i,j,k,ik-1)*h2oexp(i,j,k,ik-1) |
| 1845 |
xh1 = xh*xh |
| 1846 |
h2oexp(i,j,k,ik) = xh*xh1 |
| 1847 |
enddo |
| 1848 |
enddo |
| 1849 |
enddo |
| 1850 |
|
| 1851 |
else |
| 1852 |
|
| 1853 |
do k=1,np |
| 1854 |
do j=1,n |
| 1855 |
do i=1,m |
| 1856 |
xh = h2oexp(i,j,k,ik-1)*h2oexp(i,j,k,ik-1) |
| 1857 |
xh = xh*xh |
| 1858 |
xh = xh*xh |
| 1859 |
h2oexp(i,j,k,ik) = xh*xh |
| 1860 |
enddo |
| 1861 |
enddo |
| 1862 |
enddo |
| 1863 |
|
| 1864 |
endif |
| 1865 |
enddo |
| 1866 |
|
| 1867 |
return |
| 1868 |
end |
| 1869 |
c********************************************************************** |
| 1870 |
subroutine conexps(ib,m,n,np,dcont,xke,conexp) |
| 1871 |
c********************************************************************** |
| 1872 |
c compute exponentials for continuum absorption in individual layers. |
| 1873 |
c |
| 1874 |
c---- input parameters |
| 1875 |
c spectral band (ib) |
| 1876 |
c number of grid intervals in zonal direction (m) |
| 1877 |
c number of grid intervals in meridional direction (n) |
| 1878 |
c number of layers (np) |
| 1879 |
c layer scaled water vapor amount for continuum absorption (dcont) |
| 1880 |
c absorption coefficients for the first k-distribution function |
| 1881 |
c due to water vapor continuum absorption (xke) |
| 1882 |
c |
| 1883 |
c---- output parameters |
| 1884 |
c 1 or 3 exponentials for each layer (conexp) |
| 1885 |
c********************************************************************** |
| 1886 |
implicit none |
| 1887 |
integer ib,m,n,np,i,j,k,iq |
| 1888 |
|
| 1889 |
c---- input parameters ------ |
| 1890 |
|
| 1891 |
real dcont(m,n,np) |
| 1892 |
|
| 1893 |
c---- updated parameters ----- |
| 1894 |
|
| 1895 |
real conexp(m,n,np,3) |
| 1896 |
|
| 1897 |
c---- static data ----- |
| 1898 |
|
| 1899 |
real xke(9) |
| 1900 |
|
| 1901 |
c********************************************************************** |
| 1902 |
|
| 1903 |
do k=1,np |
| 1904 |
do j=1,n |
| 1905 |
do i=1,m |
| 1906 |
conexp(i,j,k,1) = exp(-dcont(i,j,k)*xke(ib)) |
| 1907 |
enddo |
| 1908 |
enddo |
| 1909 |
enddo |
| 1910 |
|
| 1911 |
if (ib .eq. 3) then |
| 1912 |
|
| 1913 |
c-----the absorption coefficients for sub-bands 3b (iq=2) and 3a (iq=3) |
| 1914 |
c are, respectively, two and three times the absorption coefficient |
| 1915 |
c for sub-band 3c (iq=1) (table 6). |
| 1916 |
|
| 1917 |
do iq=2,3 |
| 1918 |
do k=1,np |
| 1919 |
do j=1,n |
| 1920 |
do i=1,m |
| 1921 |
conexp(i,j,k,iq) = conexp(i,j,k,iq-1) *conexp(i,j,k,iq-1) |
| 1922 |
enddo |
| 1923 |
enddo |
| 1924 |
enddo |
| 1925 |
enddo |
| 1926 |
|
| 1927 |
endif |
| 1928 |
|
| 1929 |
return |
| 1930 |
end |
| 1931 |
c********************************************************************** |
| 1932 |
subroutine co2exps(m,n,np,dco2,pa,dt,co2exp) |
| 1933 |
c********************************************************************** |
| 1934 |
c compute co2 exponentials for individual layers. |
| 1935 |
c |
| 1936 |
c---- input parameters |
| 1937 |
c number of grid intervals in zonal direction (m) |
| 1938 |
c number of grid intervals in meridional direction (n) |
| 1939 |
c number of layers (np) |
| 1940 |
c layer co2 amount (dco2) |
| 1941 |
c layer pressure (pa) |
| 1942 |
c layer temperature minus 250K (dt) |
| 1943 |
c |
| 1944 |
c---- output parameters |
| 1945 |
c 6 exponentials for each layer (co2exp) |
| 1946 |
c********************************************************************** |
| 1947 |
implicit none |
| 1948 |
integer m,n,np,i,j,k |
| 1949 |
|
| 1950 |
c---- input parameters ----- |
| 1951 |
|
| 1952 |
real dco2(m,n,np),pa(m,n,np),dt(m,n,np) |
| 1953 |
|
| 1954 |
c---- output parameters ----- |
| 1955 |
|
| 1956 |
real co2exp(m,n,np,6,2) |
| 1957 |
|
| 1958 |
c---- temporary arrays ----- |
| 1959 |
|
| 1960 |
real xc |
| 1961 |
|
| 1962 |
c********************************************************************** |
| 1963 |
|
| 1964 |
do k=1,np |
| 1965 |
do j=1,n |
| 1966 |
do i=1,m |
| 1967 |
|
| 1968 |
c-----compute the scaled co2 amount from eq. (27) for band-wings |
| 1969 |
c (sub-bands 3a and 3c). |
| 1970 |
|
| 1971 |
xc = dco2(i,j,k)*(pa(i,j,k)/300.0)**0.5 |
| 1972 |
1 *(1.+(0.0182+1.07e-4*dt(i,j,k))*dt(i,j,k)) |
| 1973 |
|
| 1974 |
c-----six exponentials by powers of 8 (table 7). |
| 1975 |
|
| 1976 |
co2exp(i,j,k,1,1)=exp(-xc*2.656e-5) |
| 1977 |
|
| 1978 |
xc=co2exp(i,j,k,1,1)*co2exp(i,j,k,1,1) |
| 1979 |
xc=xc*xc |
| 1980 |
co2exp(i,j,k,2,1)=xc*xc |
| 1981 |
|
| 1982 |
xc=co2exp(i,j,k,2,1)*co2exp(i,j,k,2,1) |
| 1983 |
xc=xc*xc |
| 1984 |
co2exp(i,j,k,3,1)=xc*xc |
| 1985 |
|
| 1986 |
xc=co2exp(i,j,k,3,1)*co2exp(i,j,k,3,1) |
| 1987 |
xc=xc*xc |
| 1988 |
co2exp(i,j,k,4,1)=xc*xc |
| 1989 |
|
| 1990 |
xc=co2exp(i,j,k,4,1)*co2exp(i,j,k,4,1) |
| 1991 |
xc=xc*xc |
| 1992 |
co2exp(i,j,k,5,1)=xc*xc |
| 1993 |
|
| 1994 |
xc=co2exp(i,j,k,5,1)*co2exp(i,j,k,5,1) |
| 1995 |
xc=xc*xc |
| 1996 |
co2exp(i,j,k,6,1)=xc*xc |
| 1997 |
|
| 1998 |
c-----compute the scaled co2 amount from eq. (27) for band-center |
| 1999 |
c region (sub-band 3b). |
| 2000 |
|
| 2001 |
xc = dco2(i,j,k)*(pa(i,j,k)/30.0)**0.85 |
| 2002 |
1 *(1.+(0.0042+2.00e-5*dt(i,j,k))*dt(i,j,k)) |
| 2003 |
|
| 2004 |
co2exp(i,j,k,1,2)=exp(-xc*2.656e-3) |
| 2005 |
|
| 2006 |
xc=co2exp(i,j,k,1,2)*co2exp(i,j,k,1,2) |
| 2007 |
xc=xc*xc |
| 2008 |
co2exp(i,j,k,2,2)=xc*xc |
| 2009 |
|
| 2010 |
xc=co2exp(i,j,k,2,2)*co2exp(i,j,k,2,2) |
| 2011 |
xc=xc*xc |
| 2012 |
co2exp(i,j,k,3,2)=xc*xc |
| 2013 |
|
| 2014 |
xc=co2exp(i,j,k,3,2)*co2exp(i,j,k,3,2) |
| 2015 |
xc=xc*xc |
| 2016 |
co2exp(i,j,k,4,2)=xc*xc |
| 2017 |
|
| 2018 |
xc=co2exp(i,j,k,4,2)*co2exp(i,j,k,4,2) |
| 2019 |
xc=xc*xc |
| 2020 |
co2exp(i,j,k,5,2)=xc*xc |
| 2021 |
|
| 2022 |
xc=co2exp(i,j,k,5,2)*co2exp(i,j,k,5,2) |
| 2023 |
xc=xc*xc |
| 2024 |
co2exp(i,j,k,6,2)=xc*xc |
| 2025 |
|
| 2026 |
enddo |
| 2027 |
enddo |
| 2028 |
enddo |
| 2029 |
|
| 2030 |
return |
| 2031 |
end |
| 2032 |
c********************************************************************** |
| 2033 |
subroutine n2oexps(ib,m,n,np,dn2o,pa,dt,n2oexp) |
| 2034 |
c********************************************************************** |
| 2035 |
c compute n2o exponentials for individual layers. |
| 2036 |
c |
| 2037 |
c---- input parameters |
| 2038 |
c spectral band (ib) |
| 2039 |
c number of grid intervals in zonal direction (m) |
| 2040 |
c number of grid intervals in meridional direction (n) |
| 2041 |
c number of layers (np) |
| 2042 |
c layer n2o amount (dn2o) |
| 2043 |
c layer pressure (pa) |
| 2044 |
c layer temperature minus 250K (dt) |
| 2045 |
c |
| 2046 |
c---- output parameters |
| 2047 |
c 2 or 4 exponentials for each layer (n2oexp) |
| 2048 |
c********************************************************************** |
| 2049 |
implicit none |
| 2050 |
integer ib,m,n,np,i,j,k |
| 2051 |
|
| 2052 |
c---- input parameters ----- |
| 2053 |
|
| 2054 |
real dn2o(m,n,np),pa(m,n,np),dt(m,n,np) |
| 2055 |
|
| 2056 |
c---- output parameters ----- |
| 2057 |
|
| 2058 |
real n2oexp(m,n,np,4) |
| 2059 |
|
| 2060 |
c---- temporary arrays ----- |
| 2061 |
|
| 2062 |
real xc,xc1,xc2 |
| 2063 |
|
| 2064 |
c********************************************************************** |
| 2065 |
|
| 2066 |
do k=1,np |
| 2067 |
do j=1,n |
| 2068 |
do i=1,m |
| 2069 |
|
| 2070 |
c-----four exponential by powers of 21 for band 6 |
| 2071 |
|
| 2072 |
if (ib.eq.6) then |
| 2073 |
|
| 2074 |
xc=dn2o(i,j,k)*(1.+(1.9297e-3+4.3750e-6*dt(i,j,k))*dt(i,j,k)) |
| 2075 |
n2oexp(i,j,k,1)=exp(-xc*6.31582e-2) |
| 2076 |
|
| 2077 |
xc=n2oexp(i,j,k,1)*n2oexp(i,j,k,1)*n2oexp(i,j,k,1) |
| 2078 |
xc1=xc*xc |
| 2079 |
xc2=xc1*xc1 |
| 2080 |
n2oexp(i,j,k,2)=xc*xc1*xc2 |
| 2081 |
|
| 2082 |
c-----four exponential by powers of 8 for band 7 |
| 2083 |
|
| 2084 |
else |
| 2085 |
|
| 2086 |
xc=dn2o(i,j,k)*(pa(i,j,k)/500.0)**0.48 |
| 2087 |
* *(1.+(1.3804e-3+7.4838e-6*dt(i,j,k))*dt(i,j,k)) |
| 2088 |
n2oexp(i,j,k,1)=exp(-xc*5.35779e-2) |
| 2089 |
|
| 2090 |
xc=n2oexp(i,j,k,1)*n2oexp(i,j,k,1) |
| 2091 |
xc=xc*xc |
| 2092 |
n2oexp(i,j,k,2)=xc*xc |
| 2093 |
xc=n2oexp(i,j,k,2)*n2oexp(i,j,k,2) |
| 2094 |
xc=xc*xc |
| 2095 |
n2oexp(i,j,k,3)=xc*xc |
| 2096 |
xc=n2oexp(i,j,k,3)*n2oexp(i,j,k,3) |
| 2097 |
xc=xc*xc |
| 2098 |
n2oexp(i,j,k,4)=xc*xc |
| 2099 |
|
| 2100 |
endif |
| 2101 |
|
| 2102 |
enddo |
| 2103 |
enddo |
| 2104 |
enddo |
| 2105 |
|
| 2106 |
return |
| 2107 |
end |
| 2108 |
c********************************************************************** |
| 2109 |
subroutine ch4exps(ib,m,n,np,dch4,pa,dt,ch4exp) |
| 2110 |
c********************************************************************** |
| 2111 |
c compute ch4 exponentials for individual layers. |
| 2112 |
c |
| 2113 |
c---- input parameters |
| 2114 |
c spectral band (ib) |
| 2115 |
c number of grid intervals in zonal direction (m) |
| 2116 |
c number of grid intervals in meridional direction (n) |
| 2117 |
c number of layers (np) |
| 2118 |
c layer ch4 amount (dch4) |
| 2119 |
c layer pressure (pa) |
| 2120 |
c layer temperature minus 250K (dt) |
| 2121 |
c |
| 2122 |
c---- output parameters |
| 2123 |
c 1 or 4 exponentials for each layer (ch4exp) |
| 2124 |
c********************************************************************** |
| 2125 |
implicit none |
| 2126 |
integer ib,m,n,np,i,j,k |
| 2127 |
|
| 2128 |
c---- input parameters ----- |
| 2129 |
|
| 2130 |
real dch4(m,n,np),pa(m,n,np),dt(m,n,np) |
| 2131 |
|
| 2132 |
c---- output parameters ----- |
| 2133 |
|
| 2134 |
real ch4exp(m,n,np,4) |
| 2135 |
|
| 2136 |
c---- temporary arrays ----- |
| 2137 |
|
| 2138 |
real xc |
| 2139 |
|
| 2140 |
c********************************************************************** |
| 2141 |
|
| 2142 |
do k=1,np |
| 2143 |
do j=1,n |
| 2144 |
do i=1,m |
| 2145 |
|
| 2146 |
c-----four exponentials for band 6 |
| 2147 |
|
| 2148 |
if (ib.eq.6) then |
| 2149 |
|
| 2150 |
xc=dch4(i,j,k)*(1.+(1.7007e-2+1.5826e-4*dt(i,j,k))*dt(i,j,k)) |
| 2151 |
ch4exp(i,j,k,1)=exp(-xc*5.80708e-3) |
| 2152 |
|
| 2153 |
c-----four exponentials by powers of 12 for band 7 |
| 2154 |
|
| 2155 |
else |
| 2156 |
|
| 2157 |
xc=dch4(i,j,k)*(pa(i,j,k)/500.0)**0.65 |
| 2158 |
* *(1.+(5.9590e-4-2.2931e-6*dt(i,j,k))*dt(i,j,k)) |
| 2159 |
ch4exp(i,j,k,1)=exp(-xc*6.29247e-2) |
| 2160 |
|
| 2161 |
xc=ch4exp(i,j,k,1)*ch4exp(i,j,k,1)*ch4exp(i,j,k,1) |
| 2162 |
xc=xc*xc |
| 2163 |
ch4exp(i,j,k,2)=xc*xc |
| 2164 |
|
| 2165 |
xc=ch4exp(i,j,k,2)*ch4exp(i,j,k,2)*ch4exp(i,j,k,2) |
| 2166 |
xc=xc*xc |
| 2167 |
ch4exp(i,j,k,3)=xc*xc |
| 2168 |
|
| 2169 |
xc=ch4exp(i,j,k,3)*ch4exp(i,j,k,3)*ch4exp(i,j,k,3) |
| 2170 |
xc=xc*xc |
| 2171 |
ch4exp(i,j,k,4)=xc*xc |
| 2172 |
|
| 2173 |
endif |
| 2174 |
|
| 2175 |
enddo |
| 2176 |
enddo |
| 2177 |
enddo |
| 2178 |
|
| 2179 |
return |
| 2180 |
end |
| 2181 |
c********************************************************************** |
| 2182 |
subroutine comexps(ib,m,n,np,dcom,dt,comexp) |
| 2183 |
c********************************************************************** |
| 2184 |
c compute co2-minor exponentials for individual layers. |
| 2185 |
c |
| 2186 |
c---- input parameters |
| 2187 |
c spectral band (ib) |
| 2188 |
c number of grid intervals in zonal direction (m) |
| 2189 |
c number of grid intervals in meridional direction (n) |
| 2190 |
c number of layers (np) |
| 2191 |
c layer co2 amount (dcom) |
| 2192 |
c layer temperature minus 250K (dt) |
| 2193 |
c |
| 2194 |
c---- output parameters |
| 2195 |
c 2 exponentials for each layer (comexp) |
| 2196 |
c********************************************************************** |
| 2197 |
implicit none |
| 2198 |
integer ib,m,n,np,i,j,k |
| 2199 |
|
| 2200 |
c---- input parameters ----- |
| 2201 |
|
| 2202 |
real dcom(m,n,np),dt(m,n,np) |
| 2203 |
|
| 2204 |
c---- output parameters ----- |
| 2205 |
|
| 2206 |
real comexp(m,n,np,2) |
| 2207 |
|
| 2208 |
c---- temporary arrays ----- |
| 2209 |
|
| 2210 |
real xc,xc1,xc2 |
| 2211 |
|
| 2212 |
c********************************************************************** |
| 2213 |
|
| 2214 |
do k=1,np |
| 2215 |
do j=1,n |
| 2216 |
do i=1,m |
| 2217 |
|
| 2218 |
c-----two exponentials by powers of 60 for band 4 |
| 2219 |
|
| 2220 |
if (ib.eq.4) then |
| 2221 |
|
| 2222 |
xc=dcom(i,j,k)*(1.+(3.5775e-2+4.0447e-4*dt(i,j,k))*dt(i,j,k)) |
| 2223 |
comexp(i,j,k,1)=exp(-xc*2.18947e-5) |
| 2224 |
|
| 2225 |
xc=comexp(i,j,k,1)*comexp(i,j,k,1)*comexp(i,j,k,1) |
| 2226 |
xc=xc*xc |
| 2227 |
xc1=xc*xc |
| 2228 |
xc=xc1*xc1 |
| 2229 |
xc=xc*xc |
| 2230 |
comexp(i,j,k,2)=xc*xc1 |
| 2231 |
|
| 2232 |
c-----two exponentials by powers of 44 for band 5 |
| 2233 |
|
| 2234 |
else |
| 2235 |
|
| 2236 |
xc=dcom(i,j,k)*(1.+(3.4268e-2+3.7401e-4*dt(i,j,k))*dt(i,j,k)) |
| 2237 |
comexp(i,j,k,1)=exp(-xc*4.74570e-5) |
| 2238 |
|
| 2239 |
xc=comexp(i,j,k,1)*comexp(i,j,k,1) |
| 2240 |
xc1=xc*xc |
| 2241 |
xc2=xc1*xc1 |
| 2242 |
xc=xc2*xc2 |
| 2243 |
xc=xc*xc |
| 2244 |
comexp(i,j,k,2)=xc1*xc2*xc |
| 2245 |
|
| 2246 |
endif |
| 2247 |
|
| 2248 |
enddo |
| 2249 |
enddo |
| 2250 |
enddo |
| 2251 |
|
| 2252 |
return |
| 2253 |
end |
| 2254 |
c********************************************************************** |
| 2255 |
subroutine cfcexps(ib,m,n,np,a1,b1,fk1,a2,b2,fk2,dcfc,dt,cfcexp) |
| 2256 |
c********************************************************************** |
| 2257 |
c compute cfc(-11, -12, -22) exponentials for individual layers. |
| 2258 |
c |
| 2259 |
c---- input parameters |
| 2260 |
c spectral band (ib) |
| 2261 |
c number of grid intervals in zonal direction (m) |
| 2262 |
c number of grid intervals in meridional direction (n) |
| 2263 |
c number of layers (np) |
| 2264 |
c parameters for computing the scaled cfc amounts |
| 2265 |
c for temperature scaling (a1,b1,a2,b2) |
| 2266 |
c the absorption coefficients for the |
| 2267 |
c first k-distribution function due to cfcs (fk1,fk2) |
| 2268 |
c layer cfc amounts (dcfc) |
| 2269 |
c layer temperature minus 250K (dt) |
| 2270 |
c |
| 2271 |
c---- output parameters |
| 2272 |
c 1 exponential for each layer (cfcexp) |
| 2273 |
c********************************************************************** |
| 2274 |
implicit none |
| 2275 |
integer ib,m,n,np,i,j,k |
| 2276 |
|
| 2277 |
c---- input parameters ----- |
| 2278 |
|
| 2279 |
real dcfc(m,n,np),dt(m,n,np) |
| 2280 |
|
| 2281 |
c---- output parameters ----- |
| 2282 |
|
| 2283 |
real cfcexp(m,n,np) |
| 2284 |
|
| 2285 |
c---- static data ----- |
| 2286 |
|
| 2287 |
real a1,b1,fk1,a2,b2,fk2 |
| 2288 |
|
| 2289 |
c---- temporary arrays ----- |
| 2290 |
|
| 2291 |
real xf |
| 2292 |
|
| 2293 |
c********************************************************************** |
| 2294 |
|
| 2295 |
do k=1,np |
| 2296 |
do j=1,n |
| 2297 |
do i=1,m |
| 2298 |
|
| 2299 |
c-----compute the scaled cfc amount (xf) and exponential (cfcexp) |
| 2300 |
|
| 2301 |
if (ib.eq.4) then |
| 2302 |
xf=dcfc(i,j,k)*(1.+(a1+b1*dt(i,j,k))*dt(i,j,k)) |
| 2303 |
cfcexp(i,j,k)=exp(-xf*fk1) |
| 2304 |
else |
| 2305 |
xf=dcfc(i,j,k)*(1.+(a2+b2*dt(i,j,k))*dt(i,j,k)) |
| 2306 |
cfcexp(i,j,k)=exp(-xf*fk2) |
| 2307 |
endif |
| 2308 |
|
| 2309 |
enddo |
| 2310 |
enddo |
| 2311 |
enddo |
| 2312 |
|
| 2313 |
return |
| 2314 |
end |
| 2315 |
c********************************************************************** |
| 2316 |
subroutine b10exps(m,n,np,dh2o,dcont,dco2,dn2o,pa,dt |
| 2317 |
* ,h2oexp,conexp,co2exp,n2oexp) |
| 2318 |
c********************************************************************** |
| 2319 |
c compute band3a exponentials for individual layers. |
| 2320 |
c |
| 2321 |
c---- input parameters |
| 2322 |
c number of grid intervals in zonal direction (m) |
| 2323 |
c number of grid intervals in meridional direction (n) |
| 2324 |
c number of layers (np) |
| 2325 |
c layer h2o amount for line absorption (dh2o) |
| 2326 |
c layer h2o amount for continuum absorption (dcont) |
| 2327 |
c layer co2 amount (dco2) |
| 2328 |
c layer n2o amount (dn2o) |
| 2329 |
c layer pressure (pa) |
| 2330 |
c layer temperature minus 250K (dt) |
| 2331 |
c |
| 2332 |
c---- output parameters |
| 2333 |
c |
| 2334 |
c exponentials for each layer (h2oexp,conexp,co2exp,n2oexp) |
| 2335 |
c********************************************************************** |
| 2336 |
implicit none |
| 2337 |
integer m,n,np,i,j,k |
| 2338 |
|
| 2339 |
c---- input parameters ----- |
| 2340 |
|
| 2341 |
real dh2o(m,n,np),dcont(m,n,np),dn2o(m,n,np) |
| 2342 |
real dco2(m,n,np),pa(m,n,np),dt(m,n,np) |
| 2343 |
|
| 2344 |
c---- output parameters ----- |
| 2345 |
|
| 2346 |
real h2oexp(m,n,np,6),conexp(m,n,np,3),co2exp(m,n,np,6,2) |
| 2347 |
* ,n2oexp(m,n,np,4) |
| 2348 |
|
| 2349 |
c---- temporary arrays ----- |
| 2350 |
|
| 2351 |
real xx,xx1,xx2,xx3 |
| 2352 |
|
| 2353 |
c********************************************************************** |
| 2354 |
|
| 2355 |
do k=1,np |
| 2356 |
do j=1,n |
| 2357 |
do i=1,m |
| 2358 |
|
| 2359 |
c-----compute the scaled h2o-line amount for the sub-band 3a |
| 2360 |
c table 3, Chou et al. (JAS, 1993) |
| 2361 |
|
| 2362 |
xx=dh2o(i,j,k)*(pa(i,j,k)/500.0) |
| 2363 |
1 *(1.+(0.0149+6.20e-5*dt(i,j,k))*dt(i,j,k)) |
| 2364 |
|
| 2365 |
c-----six exponentials by powers of 8 |
| 2366 |
c the constant 0.10624 is equal to 1.66*0.064 |
| 2367 |
|
| 2368 |
h2oexp(i,j,k,1)=exp(-xx*0.10624) |
| 2369 |
|
| 2370 |
xx=h2oexp(i,j,k,1)*h2oexp(i,j,k,1) |
| 2371 |
xx=xx*xx |
| 2372 |
h2oexp(i,j,k,2)=xx*xx |
| 2373 |
|
| 2374 |
xx=h2oexp(i,j,k,2)*h2oexp(i,j,k,2) |
| 2375 |
xx=xx*xx |
| 2376 |
h2oexp(i,j,k,3)=xx*xx |
| 2377 |
|
| 2378 |
xx=h2oexp(i,j,k,3)*h2oexp(i,j,k,3) |
| 2379 |
xx=xx*xx |
| 2380 |
h2oexp(i,j,k,4)=xx*xx |
| 2381 |
|
| 2382 |
xx=h2oexp(i,j,k,4)*h2oexp(i,j,k,4) |
| 2383 |
xx=xx*xx |
| 2384 |
h2oexp(i,j,k,5)=xx*xx |
| 2385 |
|
| 2386 |
xx=h2oexp(i,j,k,5)*h2oexp(i,j,k,5) |
| 2387 |
xx=xx*xx |
| 2388 |
h2oexp(i,j,k,6)=xx*xx |
| 2389 |
|
| 2390 |
c-----compute the scaled co2 amount for the sub-band 3a |
| 2391 |
c table 1, Chou et al. (JAS, 1993) |
| 2392 |
|
| 2393 |
xx=dco2(i,j,k)*(pa(i,j,k)/300.0)**0.5 |
| 2394 |
1 *(1.+(0.0179+1.02e-4*dt(i,j,k))*dt(i,j,k)) |
| 2395 |
|
| 2396 |
c-----six exponentials by powers of 8 |
| 2397 |
c the constant 2.656e-5 is equal to 1.66*1.60e-5 |
| 2398 |
|
| 2399 |
co2exp(i,j,k,1,1)=exp(-xx*2.656e-5) |
| 2400 |
|
| 2401 |
xx=co2exp(i,j,k,1,1)*co2exp(i,j,k,1,1) |
| 2402 |
xx=xx*xx |
| 2403 |
co2exp(i,j,k,2,1)=xx*xx |
| 2404 |
|
| 2405 |
xx=co2exp(i,j,k,2,1)*co2exp(i,j,k,2,1) |
| 2406 |
xx=xx*xx |
| 2407 |
co2exp(i,j,k,3,1)=xx*xx |
| 2408 |
|
| 2409 |
xx=co2exp(i,j,k,3,1)*co2exp(i,j,k,3,1) |
| 2410 |
xx=xx*xx |
| 2411 |
co2exp(i,j,k,4,1)=xx*xx |
| 2412 |
|
| 2413 |
xx=co2exp(i,j,k,4,1)*co2exp(i,j,k,4,1) |
| 2414 |
xx=xx*xx |
| 2415 |
co2exp(i,j,k,5,1)=xx*xx |
| 2416 |
|
| 2417 |
xx=co2exp(i,j,k,5,1)*co2exp(i,j,k,5,1) |
| 2418 |
xx=xx*xx |
| 2419 |
co2exp(i,j,k,6,1)=xx*xx |
| 2420 |
|
| 2421 |
c-----one exponential of h2o continuum for sub-band 3a |
| 2422 |
c tabl 5 of Chou et. al. (JAS, 1993) |
| 2423 |
c the constant 1.04995e+2 is equal to 1.66*63.25 |
| 2424 |
|
| 2425 |
conexp(i,j,k,1)=exp(-dcont(i,j,k)*1.04995e+2) |
| 2426 |
|
| 2427 |
c-----compute the scaled n2o amount for sub-band 3a |
| 2428 |
|
| 2429 |
xx=dn2o(i,j,k)*(1.+(1.4476e-3+3.6656e-6*dt(i,j,k))*dt(i,j,k)) |
| 2430 |
|
| 2431 |
c-----two exponential2 by powers of 58 |
| 2432 |
|
| 2433 |
n2oexp(i,j,k,1)=exp(-xx*0.25238) |
| 2434 |
|
| 2435 |
xx=n2oexp(i,j,k,1)*n2oexp(i,j,k,1) |
| 2436 |
xx1=xx*xx |
| 2437 |
xx1=xx1*xx1 |
| 2438 |
xx2=xx1*xx1 |
| 2439 |
xx3=xx2*xx2 |
| 2440 |
n2oexp(i,j,k,2)=xx*xx1*xx2*xx3 |
| 2441 |
|
| 2442 |
enddo |
| 2443 |
enddo |
| 2444 |
enddo |
| 2445 |
|
| 2446 |
return |
| 2447 |
end |
| 2448 |
c********************************************************************** |
| 2449 |
subroutine tablup(k1,k2,m,n,np,nx,nh,nt,sabs,spre,stem,w1,p1, |
| 2450 |
* dwe,dpe,coef1,coef2,coef3,tran) |
| 2451 |
c********************************************************************** |
| 2452 |
c compute water vapor, co2 and o3 transmittances between levels |
| 2453 |
c k1 and k2 for m x n soundings, using table look-up. |
| 2454 |
c |
| 2455 |
c calculations follow Eq. (40) of Chou and Suarez (1994) |
| 2456 |
c |
| 2457 |
c---- input --------------------- |
| 2458 |
c indices for pressure levels (k1 and k2) |
| 2459 |
c number of grid intervals in zonal direction (m) |
| 2460 |
c number of grid intervals in meridional direction (n) |
| 2461 |
c number of atmospheric layers (np) |
| 2462 |
c number of pressure intervals in the table (nx) |
| 2463 |
c number of absorber amount intervals in the table (nh) |
| 2464 |
c number of tables copied (nt) |
| 2465 |
c column-integrated absorber amount (sabs) |
| 2466 |
c column absorber amount-weighted pressure (spre) |
| 2467 |
c column absorber amount-weighted temperature (stem) |
| 2468 |
c first value of absorber amount (log10) in the table (w1) |
| 2469 |
c first value of pressure (log10) in the table (p1) |
| 2470 |
c size of the interval of absorber amount (log10) in the table (dwe) |
| 2471 |
c size of the interval of pressure (log10) in the table (dpe) |
| 2472 |
c pre-computed coefficients (coef1, coef2, and coef3) |
| 2473 |
c |
| 2474 |
c---- updated --------------------- |
| 2475 |
c transmittance (tran) |
| 2476 |
c |
| 2477 |
c Note: |
| 2478 |
c (1) units of sabs are g/cm**2 for water vapor and |
| 2479 |
c (cm-atm)stp for co2 and o3. |
| 2480 |
c (2) units of spre and stem are, respectively, mb and K. |
| 2481 |
c (3) there are nt identical copies of the tables (coef1, coef2, and |
| 2482 |
c coef3). the prupose of using the multiple copies of tables is |
| 2483 |
c to increase the speed in parallel (vectorized) computations. |
| 2484 |
C if such advantage does not exist, nt can be set to 1. |
| 2485 |
c |
| 2486 |
c********************************************************************** |
| 2487 |
implicit none |
| 2488 |
integer k1,k2,m,n,np,nx,nh,nt,i,j |
| 2489 |
|
| 2490 |
c---- input parameters ----- |
| 2491 |
|
| 2492 |
real w1,p1,dwe,dpe |
| 2493 |
real sabs(m,n,np+1),spre(m,n,np+1),stem(m,n,np+1) |
| 2494 |
real coef1(nx,nh,nt),coef2(nx,nh,nt),coef3(nx,nh,nt) |
| 2495 |
|
| 2496 |
c---- update parameter ----- |
| 2497 |
|
| 2498 |
real tran(m,n) |
| 2499 |
|
| 2500 |
c---- temporary variables ----- |
| 2501 |
|
| 2502 |
real x1,x2,x3,we,pe,fw,fp,pa,pb,pc,ax,ba,bb,t1,ca,cb,t2 |
| 2503 |
integer iw,ip,nn |
| 2504 |
|
| 2505 |
c********************************************************************** |
| 2506 |
|
| 2507 |
do j=1,n |
| 2508 |
do i=1,m |
| 2509 |
|
| 2510 |
nn=mod(i,nt)+1 |
| 2511 |
|
| 2512 |
x1=sabs(i,j,k2)-sabs(i,j,k1) |
| 2513 |
x2=(spre(i,j,k2)-spre(i,j,k1))/x1 |
| 2514 |
x3=(stem(i,j,k2)-stem(i,j,k1))/x1 |
| 2515 |
|
| 2516 |
we=(log10(x1)-w1)/dwe |
| 2517 |
pe=(log10(x2)-p1)/dpe |
| 2518 |
|
| 2519 |
we=max(we,w1-2.*dwe) |
| 2520 |
pe=max(pe,p1) |
| 2521 |
|
| 2522 |
iw=int(we+1.5) |
| 2523 |
ip=int(pe+1.5) |
| 2524 |
|
| 2525 |
iw=min(iw,nh-1) |
| 2526 |
iw=max(iw, 2) |
| 2527 |
|
| 2528 |
ip=min(ip,nx-1) |
| 2529 |
ip=max(ip, 1) |
| 2530 |
|
| 2531 |
fw=we-float(iw-1) |
| 2532 |
fp=pe-float(ip-1) |
| 2533 |
|
| 2534 |
c-----linear interpolation in pressure |
| 2535 |
|
| 2536 |
pa = coef1(ip,iw-1,nn)*(1.-fp)+coef1(ip+1,iw-1,nn)*fp |
| 2537 |
pb = coef1(ip,iw, nn)*(1.-fp)+coef1(ip+1,iw, nn)*fp |
| 2538 |
pc = coef1(ip,iw+1,nn)*(1.-fp)+coef1(ip+1,iw+1,nn)*fp |
| 2539 |
|
| 2540 |
c-----quadratic interpolation in absorber amount for coef1 |
| 2541 |
|
| 2542 |
ax = (-pa*(1.-fw)+pc*(1.+fw)) *fw*0.5 + pb*(1.-fw*fw) |
| 2543 |
|
| 2544 |
c-----linear interpolation in absorber amount for coef2 and coef3 |
| 2545 |
|
| 2546 |
ba = coef2(ip,iw, nn)*(1.-fp)+coef2(ip+1,iw, nn)*fp |
| 2547 |
bb = coef2(ip,iw+1,nn)*(1.-fp)+coef2(ip+1,iw+1,nn)*fp |
| 2548 |
t1 = ba*(1.-fw) + bb*fw |
| 2549 |
|
| 2550 |
ca = coef3(ip,iw, nn)*(1.-fp)+coef3(ip+1,iw, nn)*fp |
| 2551 |
cb = coef3(ip,iw+1,nn)*(1.-fp)+coef3(ip+1,iw+1,nn)*fp |
| 2552 |
t2 = ca*(1.-fw) + cb*fw |
| 2553 |
|
| 2554 |
c-----update the total transmittance between levels k1 and k2 |
| 2555 |
|
| 2556 |
tran(i,j)= (ax + (t1+t2*x3) * x3)*tran(i,j) |
| 2557 |
|
| 2558 |
enddo |
| 2559 |
enddo |
| 2560 |
|
| 2561 |
return |
| 2562 |
end |
| 2563 |
c********************************************************************** |
| 2564 |
subroutine h2okdis(ib,m,n,np,k,fkw,gkw,ne,h2oexp,conexp, |
| 2565 |
* th2o,tcon,tran) |
| 2566 |
c********************************************************************** |
| 2567 |
c compute water vapor transmittance between levels k1 and k2 for |
| 2568 |
c m x n soundings, using the k-distribution method. |
| 2569 |
c |
| 2570 |
c computations follow eqs. (34), (46), (50) and (52). |
| 2571 |
c |
| 2572 |
c---- input parameters |
| 2573 |
c spectral band (ib) |
| 2574 |
c number of grid intervals in zonal direction (m) |
| 2575 |
c number of grid intervals in meridional direction (n) |
| 2576 |
c number of levels (np) |
| 2577 |
c current level (k) |
| 2578 |
c planck-weighted k-distribution function due to |
| 2579 |
c h2o line absorption (fkw) |
| 2580 |
c planck-weighted k-distribution function due to |
| 2581 |
c h2o continuum absorption (gkw) |
| 2582 |
c number of terms used in each band to compute water vapor |
| 2583 |
c continuum transmittance (ne) |
| 2584 |
c exponentials for line absorption (h2oexp) |
| 2585 |
c exponentials for continuum absorption (conexp) |
| 2586 |
c |
| 2587 |
c---- updated parameters |
| 2588 |
c transmittance between levels k1 and k2 due to |
| 2589 |
c water vapor line absorption (th2o) |
| 2590 |
c transmittance between levels k1 and k2 due to |
| 2591 |
c water vapor continuum absorption (tcon) |
| 2592 |
c total transmittance (tran) |
| 2593 |
c |
| 2594 |
c********************************************************************** |
| 2595 |
implicit none |
| 2596 |
integer ib,m,n,np,k,i,j |
| 2597 |
|
| 2598 |
c---- input parameters ------ |
| 2599 |
|
| 2600 |
real conexp(m,n,np,3),h2oexp(m,n,np,6) |
| 2601 |
integer ne(9) |
| 2602 |
real fkw(6,9),gkw(6,3) |
| 2603 |
|
| 2604 |
c---- updated parameters ----- |
| 2605 |
|
| 2606 |
real th2o(m,n,6),tcon(m,n,3),tran(m,n) |
| 2607 |
|
| 2608 |
c---- temporary arrays ----- |
| 2609 |
|
| 2610 |
real trnth2o |
| 2611 |
|
| 2612 |
c-----tco2 are the six exp factors between levels k1 and k2 |
| 2613 |
c tran is the updated total transmittance between levels k1 and k2 |
| 2614 |
|
| 2615 |
c-----th2o is the 6 exp factors between levels k1 and k2 due to |
| 2616 |
c h2o line absorption. |
| 2617 |
|
| 2618 |
c-----tcon is the 3 exp factors between levels k1 and k2 due to |
| 2619 |
c h2o continuum absorption. |
| 2620 |
|
| 2621 |
c-----trnth2o is the total transmittance between levels k1 and k2 due |
| 2622 |
c to both line and continuum absorption computed from eq. (52). |
| 2623 |
|
| 2624 |
do j=1,n |
| 2625 |
do i=1,m |
| 2626 |
th2o(i,j,1) = th2o(i,j,1)*h2oexp(i,j,k,1) |
| 2627 |
th2o(i,j,2) = th2o(i,j,2)*h2oexp(i,j,k,2) |
| 2628 |
th2o(i,j,3) = th2o(i,j,3)*h2oexp(i,j,k,3) |
| 2629 |
th2o(i,j,4) = th2o(i,j,4)*h2oexp(i,j,k,4) |
| 2630 |
th2o(i,j,5) = th2o(i,j,5)*h2oexp(i,j,k,5) |
| 2631 |
th2o(i,j,6) = th2o(i,j,6)*h2oexp(i,j,k,6) |
| 2632 |
enddo |
| 2633 |
enddo |
| 2634 |
|
| 2635 |
if (ne(ib).eq.0) then |
| 2636 |
|
| 2637 |
do j=1,n |
| 2638 |
do i=1,m |
| 2639 |
|
| 2640 |
trnth2o =(fkw(1,ib)*th2o(i,j,1) |
| 2641 |
* + fkw(2,ib)*th2o(i,j,2) |
| 2642 |
* + fkw(3,ib)*th2o(i,j,3) |
| 2643 |
* + fkw(4,ib)*th2o(i,j,4) |
| 2644 |
* + fkw(5,ib)*th2o(i,j,5) |
| 2645 |
* + fkw(6,ib)*th2o(i,j,6)) |
| 2646 |
|
| 2647 |
tran(i,j)=tran(i,j)*trnth2o |
| 2648 |
|
| 2649 |
enddo |
| 2650 |
enddo |
| 2651 |
|
| 2652 |
elseif (ne(ib).eq.1) then |
| 2653 |
|
| 2654 |
do j=1,n |
| 2655 |
do i=1,m |
| 2656 |
|
| 2657 |
tcon(i,j,1)= tcon(i,j,1)*conexp(i,j,k,1) |
| 2658 |
|
| 2659 |
trnth2o =(fkw(1,ib)*th2o(i,j,1) |
| 2660 |
* + fkw(2,ib)*th2o(i,j,2) |
| 2661 |
* + fkw(3,ib)*th2o(i,j,3) |
| 2662 |
* + fkw(4,ib)*th2o(i,j,4) |
| 2663 |
* + fkw(5,ib)*th2o(i,j,5) |
| 2664 |
* + fkw(6,ib)*th2o(i,j,6))*tcon(i,j,1) |
| 2665 |
|
| 2666 |
tran(i,j)=tran(i,j)*trnth2o |
| 2667 |
|
| 2668 |
enddo |
| 2669 |
enddo |
| 2670 |
|
| 2671 |
else |
| 2672 |
|
| 2673 |
do j=1,n |
| 2674 |
do i=1,m |
| 2675 |
|
| 2676 |
tcon(i,j,1)= tcon(i,j,1)*conexp(i,j,k,1) |
| 2677 |
tcon(i,j,2)= tcon(i,j,2)*conexp(i,j,k,2) |
| 2678 |
tcon(i,j,3)= tcon(i,j,3)*conexp(i,j,k,3) |
| 2679 |
|
| 2680 |
|
| 2681 |
trnth2o = ( gkw(1,1)*th2o(i,j,1) |
| 2682 |
* + gkw(2,1)*th2o(i,j,2) |
| 2683 |
* + gkw(3,1)*th2o(i,j,3) |
| 2684 |
* + gkw(4,1)*th2o(i,j,4) |
| 2685 |
* + gkw(5,1)*th2o(i,j,5) |
| 2686 |
* + gkw(6,1)*th2o(i,j,6) ) * tcon(i,j,1) |
| 2687 |
* + ( gkw(1,2)*th2o(i,j,1) |
| 2688 |
* + gkw(2,2)*th2o(i,j,2) |
| 2689 |
* + gkw(3,2)*th2o(i,j,3) |
| 2690 |
* + gkw(4,2)*th2o(i,j,4) |
| 2691 |
* + gkw(5,2)*th2o(i,j,5) |
| 2692 |
* + gkw(6,2)*th2o(i,j,6) ) * tcon(i,j,2) |
| 2693 |
* + ( gkw(1,3)*th2o(i,j,1) |
| 2694 |
* + gkw(2,3)*th2o(i,j,2) |
| 2695 |
* + gkw(3,3)*th2o(i,j,3) |
| 2696 |
* + gkw(4,3)*th2o(i,j,4) |
| 2697 |
* + gkw(5,3)*th2o(i,j,5) |
| 2698 |
* + gkw(6,3)*th2o(i,j,6) ) * tcon(i,j,3) |
| 2699 |
|
| 2700 |
tran(i,j)=tran(i,j)*trnth2o |
| 2701 |
|
| 2702 |
enddo |
| 2703 |
enddo |
| 2704 |
|
| 2705 |
endif |
| 2706 |
|
| 2707 |
return |
| 2708 |
end |
| 2709 |
c********************************************************************** |
| 2710 |
subroutine co2kdis(m,n,np,k,co2exp,tco2,tran) |
| 2711 |
c********************************************************************** |
| 2712 |
c compute co2 transmittances between levels k1 and k2 for |
| 2713 |
c m x n soundings, using the k-distribution method with linear |
| 2714 |
c pressure scaling. computations follow eq. (34). |
| 2715 |
c |
| 2716 |
c---- input parameters |
| 2717 |
c number of grid intervals in zonal direction (m) |
| 2718 |
c number of grid intervals in meridional direction (n) |
| 2719 |
c number of levels (np) |
| 2720 |
c current level (k) |
| 2721 |
c exponentials for co2 absorption (co2exp) |
| 2722 |
c |
| 2723 |
c---- updated parameters |
| 2724 |
c transmittance between levels k1 and k2 due to co2 absorption |
| 2725 |
c for the various values of the absorption coefficient (tco2) |
| 2726 |
c total transmittance (tran) |
| 2727 |
c |
| 2728 |
c********************************************************************** |
| 2729 |
implicit none |
| 2730 |
integer m,n,np,k,i,j |
| 2731 |
|
| 2732 |
c---- input parameters ----- |
| 2733 |
|
| 2734 |
real co2exp(m,n,np,6,2) |
| 2735 |
|
| 2736 |
c---- updated parameters ----- |
| 2737 |
|
| 2738 |
real tco2(m,n,6,2),tran(m,n) |
| 2739 |
|
| 2740 |
c---- temporary arrays ----- |
| 2741 |
|
| 2742 |
real xc |
| 2743 |
|
| 2744 |
c-----tco2 is the 6 exp factors between levels k1 and k2. |
| 2745 |
c xc is the total co2 transmittance given by eq. (53). |
| 2746 |
|
| 2747 |
do j=1,n |
| 2748 |
do i=1,m |
| 2749 |
|
| 2750 |
c-----band-wings |
| 2751 |
|
| 2752 |
tco2(i,j,1,1)=tco2(i,j,1,1)*co2exp(i,j,k,1,1) |
| 2753 |
xc= 0.1395 *tco2(i,j,1,1) |
| 2754 |
|
| 2755 |
tco2(i,j,2,1)=tco2(i,j,2,1)*co2exp(i,j,k,2,1) |
| 2756 |
xc=xc+0.1407 *tco2(i,j,2,1) |
| 2757 |
|
| 2758 |
tco2(i,j,3,1)=tco2(i,j,3,1)*co2exp(i,j,k,3,1) |
| 2759 |
xc=xc+0.1549 *tco2(i,j,3,1) |
| 2760 |
|
| 2761 |
tco2(i,j,4,1)=tco2(i,j,4,1)*co2exp(i,j,k,4,1) |
| 2762 |
xc=xc+0.1357 *tco2(i,j,4,1) |
| 2763 |
|
| 2764 |
tco2(i,j,5,1)=tco2(i,j,5,1)*co2exp(i,j,k,5,1) |
| 2765 |
xc=xc+0.0182 *tco2(i,j,5,1) |
| 2766 |
|
| 2767 |
tco2(i,j,6,1)=tco2(i,j,6,1)*co2exp(i,j,k,6,1) |
| 2768 |
xc=xc+0.0220 *tco2(i,j,6,1) |
| 2769 |
|
| 2770 |
c-----band-center region |
| 2771 |
|
| 2772 |
tco2(i,j,1,2)=tco2(i,j,1,2)*co2exp(i,j,k,1,2) |
| 2773 |
xc=xc+0.0766 *tco2(i,j,1,2) |
| 2774 |
|
| 2775 |
tco2(i,j,2,2)=tco2(i,j,2,2)*co2exp(i,j,k,2,2) |
| 2776 |
xc=xc+0.1372 *tco2(i,j,2,2) |
| 2777 |
|
| 2778 |
tco2(i,j,3,2)=tco2(i,j,3,2)*co2exp(i,j,k,3,2) |
| 2779 |
xc=xc+0.1189 *tco2(i,j,3,2) |
| 2780 |
|
| 2781 |
tco2(i,j,4,2)=tco2(i,j,4,2)*co2exp(i,j,k,4,2) |
| 2782 |
xc=xc+0.0335 *tco2(i,j,4,2) |
| 2783 |
|
| 2784 |
tco2(i,j,5,2)=tco2(i,j,5,2)*co2exp(i,j,k,5,2) |
| 2785 |
xc=xc+0.0169 *tco2(i,j,5,2) |
| 2786 |
|
| 2787 |
tco2(i,j,6,2)=tco2(i,j,6,2)*co2exp(i,j,k,6,2) |
| 2788 |
xc=xc+0.0059 *tco2(i,j,6,2) |
| 2789 |
|
| 2790 |
tran(i,j)=tran(i,j)*xc |
| 2791 |
|
| 2792 |
enddo |
| 2793 |
enddo |
| 2794 |
|
| 2795 |
return |
| 2796 |
end |
| 2797 |
c********************************************************************** |
| 2798 |
subroutine n2okdis(ib,m,n,np,k,n2oexp,tn2o,tran) |
| 2799 |
c********************************************************************** |
| 2800 |
c compute n2o transmittances between levels k1 and k2 for |
| 2801 |
c m x n soundings, using the k-distribution method with linear |
| 2802 |
c pressure scaling. |
| 2803 |
c |
| 2804 |
c---- input parameters |
| 2805 |
c spectral band (ib) |
| 2806 |
c number of grid intervals in zonal direction (m) |
| 2807 |
c number of grid intervals in meridional direction (n) |
| 2808 |
c number of levels (np) |
| 2809 |
c current level (k) |
| 2810 |
c exponentials for n2o absorption (n2oexp) |
| 2811 |
c |
| 2812 |
c---- updated parameters |
| 2813 |
c transmittance between levels k1 and k2 due to n2o absorption |
| 2814 |
c for the various values of the absorption coefficient (tn2o) |
| 2815 |
c total transmittance (tran) |
| 2816 |
c |
| 2817 |
c********************************************************************** |
| 2818 |
implicit none |
| 2819 |
integer ib,m,n,np,k,i,j |
| 2820 |
|
| 2821 |
c---- input parameters ----- |
| 2822 |
|
| 2823 |
real n2oexp(m,n,np,4) |
| 2824 |
|
| 2825 |
c---- updated parameters ----- |
| 2826 |
|
| 2827 |
real tn2o(m,n,4),tran(m,n) |
| 2828 |
|
| 2829 |
c---- temporary arrays ----- |
| 2830 |
|
| 2831 |
real xc |
| 2832 |
|
| 2833 |
c-----tn2o is the 2 exp factors between levels k1 and k2. |
| 2834 |
c xc is the total n2o transmittance |
| 2835 |
|
| 2836 |
do j=1,n |
| 2837 |
do i=1,m |
| 2838 |
|
| 2839 |
c-----band 6 |
| 2840 |
|
| 2841 |
if (ib.eq.6) then |
| 2842 |
|
| 2843 |
tn2o(i,j,1)=tn2o(i,j,1)*n2oexp(i,j,k,1) |
| 2844 |
xc= 0.940414*tn2o(i,j,1) |
| 2845 |
|
| 2846 |
tn2o(i,j,2)=tn2o(i,j,2)*n2oexp(i,j,k,2) |
| 2847 |
xc=xc+0.059586*tn2o(i,j,2) |
| 2848 |
|
| 2849 |
c-----band 7 |
| 2850 |
|
| 2851 |
else |
| 2852 |
|
| 2853 |
tn2o(i,j,1)=tn2o(i,j,1)*n2oexp(i,j,k,1) |
| 2854 |
xc= 0.561961*tn2o(i,j,1) |
| 2855 |
|
| 2856 |
tn2o(i,j,2)=tn2o(i,j,2)*n2oexp(i,j,k,2) |
| 2857 |
xc=xc+0.138707*tn2o(i,j,2) |
| 2858 |
|
| 2859 |
tn2o(i,j,3)=tn2o(i,j,3)*n2oexp(i,j,k,3) |
| 2860 |
xc=xc+0.240670*tn2o(i,j,3) |
| 2861 |
|
| 2862 |
tn2o(i,j,4)=tn2o(i,j,4)*n2oexp(i,j,k,4) |
| 2863 |
xc=xc+0.058662*tn2o(i,j,4) |
| 2864 |
|
| 2865 |
endif |
| 2866 |
|
| 2867 |
tran(i,j)=tran(i,j)*xc |
| 2868 |
|
| 2869 |
enddo |
| 2870 |
enddo |
| 2871 |
|
| 2872 |
return |
| 2873 |
end |
| 2874 |
c********************************************************************** |
| 2875 |
subroutine ch4kdis(ib,m,n,np,k,ch4exp,tch4,tran) |
| 2876 |
c********************************************************************** |
| 2877 |
c compute ch4 transmittances between levels k1 and k2 for |
| 2878 |
c m x n soundings, using the k-distribution method with |
| 2879 |
c linear pressure scaling. |
| 2880 |
c |
| 2881 |
c---- input parameters |
| 2882 |
c spectral band (ib) |
| 2883 |
c number of grid intervals in zonal direction (m) |
| 2884 |
c number of grid intervals in meridional direction (n) |
| 2885 |
c number of levels (np) |
| 2886 |
c current level (k) |
| 2887 |
c exponentials for ch4 absorption (ch4exp) |
| 2888 |
c |
| 2889 |
c---- updated parameters |
| 2890 |
c transmittance between levels k1 and k2 due to ch4 absorption |
| 2891 |
c for the various values of the absorption coefficient (tch4) |
| 2892 |
c total transmittance (tran) |
| 2893 |
c |
| 2894 |
c********************************************************************** |
| 2895 |
implicit none |
| 2896 |
integer ib,m,n,np,k,i,j |
| 2897 |
|
| 2898 |
c---- input parameters ----- |
| 2899 |
|
| 2900 |
real ch4exp(m,n,np,4) |
| 2901 |
|
| 2902 |
c---- updated parameters ----- |
| 2903 |
|
| 2904 |
real tch4(m,n,4),tran(m,n) |
| 2905 |
|
| 2906 |
c---- temporary arrays ----- |
| 2907 |
|
| 2908 |
real xc |
| 2909 |
|
| 2910 |
c-----tch4 is the 2 exp factors between levels k1 and k2. |
| 2911 |
c xc is the total ch4 transmittance |
| 2912 |
|
| 2913 |
do j=1,n |
| 2914 |
do i=1,m |
| 2915 |
|
| 2916 |
c-----band 6 |
| 2917 |
|
| 2918 |
if (ib.eq.6) then |
| 2919 |
|
| 2920 |
tch4(i,j,1)=tch4(i,j,1)*ch4exp(i,j,k,1) |
| 2921 |
xc= tch4(i,j,1) |
| 2922 |
|
| 2923 |
c-----band 7 |
| 2924 |
|
| 2925 |
else |
| 2926 |
|
| 2927 |
tch4(i,j,1)=tch4(i,j,1)*ch4exp(i,j,k,1) |
| 2928 |
xc= 0.610650*tch4(i,j,1) |
| 2929 |
|
| 2930 |
tch4(i,j,2)=tch4(i,j,2)*ch4exp(i,j,k,2) |
| 2931 |
xc=xc+0.280212*tch4(i,j,2) |
| 2932 |
|
| 2933 |
tch4(i,j,3)=tch4(i,j,3)*ch4exp(i,j,k,3) |
| 2934 |
xc=xc+0.107349*tch4(i,j,3) |
| 2935 |
|
| 2936 |
tch4(i,j,4)=tch4(i,j,4)*ch4exp(i,j,k,4) |
| 2937 |
xc=xc+0.001789*tch4(i,j,4) |
| 2938 |
|
| 2939 |
endif |
| 2940 |
|
| 2941 |
tran(i,j)=tran(i,j)*xc |
| 2942 |
|
| 2943 |
enddo |
| 2944 |
enddo |
| 2945 |
|
| 2946 |
return |
| 2947 |
end |
| 2948 |
c********************************************************************** |
| 2949 |
subroutine comkdis(ib,m,n,np,k,comexp,tcom,tran) |
| 2950 |
c********************************************************************** |
| 2951 |
c compute co2-minor transmittances between levels k1 and k2 |
| 2952 |
c for m x n soundings, using the k-distribution method |
| 2953 |
c with linear pressure scaling. |
| 2954 |
c |
| 2955 |
c---- input parameters |
| 2956 |
c spectral band (ib) |
| 2957 |
c number of grid intervals in zonal direction (m) |
| 2958 |
c number of grid intervals in meridional direction (n) |
| 2959 |
c number of levels (np) |
| 2960 |
c current level (k) |
| 2961 |
c exponentials for co2-minor absorption (comexp) |
| 2962 |
c |
| 2963 |
c---- updated parameters |
| 2964 |
c transmittance between levels k1 and k2 due to co2-minor absorption |
| 2965 |
c for the various values of the absorption coefficient (tcom) |
| 2966 |
c total transmittance (tran) |
| 2967 |
c |
| 2968 |
c********************************************************************** |
| 2969 |
implicit none |
| 2970 |
integer ib,m,n,np,k,i,j |
| 2971 |
|
| 2972 |
c---- input parameters ----- |
| 2973 |
|
| 2974 |
real comexp(m,n,np,2) |
| 2975 |
|
| 2976 |
c---- updated parameters ----- |
| 2977 |
|
| 2978 |
real tcom(m,n,2),tran(m,n) |
| 2979 |
|
| 2980 |
c---- temporary arrays ----- |
| 2981 |
|
| 2982 |
real xc |
| 2983 |
|
| 2984 |
c-----tcom is the 2 exp factors between levels k1 and k2. |
| 2985 |
c xc is the total co2-minor transmittance |
| 2986 |
|
| 2987 |
do j=1,n |
| 2988 |
do i=1,m |
| 2989 |
|
| 2990 |
c-----band 4 |
| 2991 |
|
| 2992 |
if (ib.eq.4) then |
| 2993 |
|
| 2994 |
tcom(i,j,1)=tcom(i,j,1)*comexp(i,j,k,1) |
| 2995 |
xc= 0.972025*tcom(i,j,1) |
| 2996 |
tcom(i,j,2)=tcom(i,j,2)*comexp(i,j,k,2) |
| 2997 |
xc=xc+0.027975*tcom(i,j,2) |
| 2998 |
|
| 2999 |
c-----band 5 |
| 3000 |
|
| 3001 |
else |
| 3002 |
|
| 3003 |
tcom(i,j,1)=tcom(i,j,1)*comexp(i,j,k,1) |
| 3004 |
xc= 0.961324*tcom(i,j,1) |
| 3005 |
tcom(i,j,2)=tcom(i,j,2)*comexp(i,j,k,2) |
| 3006 |
xc=xc+0.038676*tcom(i,j,2) |
| 3007 |
|
| 3008 |
endif |
| 3009 |
|
| 3010 |
tran(i,j)=tran(i,j)*xc |
| 3011 |
|
| 3012 |
enddo |
| 3013 |
enddo |
| 3014 |
|
| 3015 |
return |
| 3016 |
end |
| 3017 |
c********************************************************************** |
| 3018 |
subroutine cfckdis(m,n,np,k,cfcexp,tcfc,tran) |
| 3019 |
c********************************************************************** |
| 3020 |
c compute cfc-(11,12,22) transmittances between levels k1 and k2 |
| 3021 |
c for m x n soundings, using the k-distribution method with |
| 3022 |
c linear pressure scaling. |
| 3023 |
c |
| 3024 |
c---- input parameters |
| 3025 |
c number of grid intervals in zonal direction (m) |
| 3026 |
c number of grid intervals in meridional direction (n) |
| 3027 |
c number of levels (np) |
| 3028 |
c current level (k) |
| 3029 |
c exponentials for cfc absorption (cfcexp) |
| 3030 |
c |
| 3031 |
c---- updated parameters |
| 3032 |
c transmittance between levels k1 and k2 due to cfc absorption |
| 3033 |
c for the various values of the absorption coefficient (tcfc) |
| 3034 |
c total transmittance (tran) |
| 3035 |
c |
| 3036 |
c********************************************************************** |
| 3037 |
implicit none |
| 3038 |
integer m,n,np,k,i,j |
| 3039 |
|
| 3040 |
c---- input parameters ----- |
| 3041 |
|
| 3042 |
real cfcexp(m,n,np) |
| 3043 |
|
| 3044 |
c---- updated parameters ----- |
| 3045 |
|
| 3046 |
real tcfc(m,n),tran(m,n) |
| 3047 |
|
| 3048 |
c-----tcfc is the exp factors between levels k1 and k2. |
| 3049 |
|
| 3050 |
do j=1,n |
| 3051 |
do i=1,m |
| 3052 |
|
| 3053 |
tcfc(i,j)=tcfc(i,j)*cfcexp(i,j,k) |
| 3054 |
tran(i,j)=tran(i,j)*tcfc(i,j) |
| 3055 |
|
| 3056 |
enddo |
| 3057 |
enddo |
| 3058 |
|
| 3059 |
return |
| 3060 |
end |
| 3061 |
c********************************************************************** |
| 3062 |
subroutine b10kdis(m,n,np,k,h2oexp,conexp,co2exp,n2oexp |
| 3063 |
* ,th2o,tcon,tco2,tn2o,tran) |
| 3064 |
c********************************************************************** |
| 3065 |
c |
| 3066 |
c compute h2o (line and continuum),co2,n2o transmittances between |
| 3067 |
c levels k1 and k2 for m x n soundings, using the k-distribution |
| 3068 |
c method with linear pressure scaling. |
| 3069 |
c |
| 3070 |
c---- input parameters |
| 3071 |
c number of grid intervals in zonal direction (m) |
| 3072 |
c number of grid intervals in meridional direction (n) |
| 3073 |
c number of levels (np) |
| 3074 |
c current level (k) |
| 3075 |
c exponentials for h2o line absorption (h2oexp) |
| 3076 |
c exponentials for h2o continuum absorption (conexp) |
| 3077 |
c exponentials for co2 absorption (co2exp) |
| 3078 |
c exponentials for n2o absorption (n2oexp) |
| 3079 |
c |
| 3080 |
c---- updated parameters |
| 3081 |
c transmittance between levels k1 and k2 due to h2o line absorption |
| 3082 |
c for the various values of the absorption coefficient (th2o) |
| 3083 |
c transmittance between levels k1 and k2 due to h2o continuum |
| 3084 |
c absorption for the various values of the absorption |
| 3085 |
c coefficient (tcon) |
| 3086 |
c transmittance between levels k1 and k2 due to co2 absorption |
| 3087 |
c for the various values of the absorption coefficient (tco2) |
| 3088 |
c transmittance between levels k1 and k2 due to n2o absorption |
| 3089 |
c for the various values of the absorption coefficient (tn2o) |
| 3090 |
c total transmittance (tran) |
| 3091 |
c |
| 3092 |
c********************************************************************** |
| 3093 |
implicit none |
| 3094 |
integer m,n,np,k,i,j |
| 3095 |
|
| 3096 |
c---- input parameters ----- |
| 3097 |
|
| 3098 |
real h2oexp(m,n,np,6),conexp(m,n,np,3),co2exp(m,n,np,6,2) |
| 3099 |
* ,n2oexp(m,n,np,4) |
| 3100 |
|
| 3101 |
c---- updated parameters ----- |
| 3102 |
|
| 3103 |
real th2o(m,n,6),tcon(m,n,3),tco2(m,n,6,2),tn2o(m,n,4) |
| 3104 |
* ,tran(m,n) |
| 3105 |
|
| 3106 |
c---- temporary arrays ----- |
| 3107 |
|
| 3108 |
real xx |
| 3109 |
|
| 3110 |
c-----initialize tran |
| 3111 |
|
| 3112 |
do j=1,n |
| 3113 |
do i=1,m |
| 3114 |
tran(i,j)=1.0 |
| 3115 |
enddo |
| 3116 |
enddo |
| 3117 |
|
| 3118 |
c-----for h2o line |
| 3119 |
|
| 3120 |
do j=1,n |
| 3121 |
do i=1,m |
| 3122 |
|
| 3123 |
th2o(i,j,1)=th2o(i,j,1)*h2oexp(i,j,k,1) |
| 3124 |
xx= 0.3153*th2o(i,j,1) |
| 3125 |
|
| 3126 |
th2o(i,j,2)=th2o(i,j,2)*h2oexp(i,j,k,2) |
| 3127 |
xx=xx+0.4604*th2o(i,j,2) |
| 3128 |
|
| 3129 |
th2o(i,j,3)=th2o(i,j,3)*h2oexp(i,j,k,3) |
| 3130 |
xx=xx+0.1326*th2o(i,j,3) |
| 3131 |
|
| 3132 |
th2o(i,j,4)=th2o(i,j,4)*h2oexp(i,j,k,4) |
| 3133 |
xx=xx+0.0798*th2o(i,j,4) |
| 3134 |
|
| 3135 |
th2o(i,j,5)=th2o(i,j,5)*h2oexp(i,j,k,5) |
| 3136 |
xx=xx+0.0119*th2o(i,j,5) |
| 3137 |
|
| 3138 |
tran(i,j)=tran(i,j)*xx |
| 3139 |
|
| 3140 |
enddo |
| 3141 |
enddo |
| 3142 |
|
| 3143 |
c-----for h2o continuum |
| 3144 |
|
| 3145 |
do j=1,n |
| 3146 |
do i=1,m |
| 3147 |
|
| 3148 |
tcon(i,j,1)=tcon(i,j,1)*conexp(i,j,k,1) |
| 3149 |
tran(i,j)=tran(i,j)*tcon(i,j,1) |
| 3150 |
|
| 3151 |
enddo |
| 3152 |
enddo |
| 3153 |
|
| 3154 |
c-----for co2 |
| 3155 |
|
| 3156 |
do j=1,n |
| 3157 |
do i=1,m |
| 3158 |
|
| 3159 |
tco2(i,j,1,1)=tco2(i,j,1,1)*co2exp(i,j,k,1,1) |
| 3160 |
xx= 0.2673*tco2(i,j,1,1) |
| 3161 |
|
| 3162 |
tco2(i,j,2,1)=tco2(i,j,2,1)*co2exp(i,j,k,2,1) |
| 3163 |
xx=xx+ 0.2201*tco2(i,j,2,1) |
| 3164 |
|
| 3165 |
tco2(i,j,3,1)=tco2(i,j,3,1)*co2exp(i,j,k,3,1) |
| 3166 |
xx=xx+ 0.2106*tco2(i,j,3,1) |
| 3167 |
|
| 3168 |
tco2(i,j,4,1)=tco2(i,j,4,1)*co2exp(i,j,k,4,1) |
| 3169 |
xx=xx+ 0.2409*tco2(i,j,4,1) |
| 3170 |
|
| 3171 |
tco2(i,j,5,1)=tco2(i,j,5,1)*co2exp(i,j,k,5,1) |
| 3172 |
xx=xx+ 0.0196*tco2(i,j,5,1) |
| 3173 |
|
| 3174 |
tco2(i,j,6,1)=tco2(i,j,6,1)*co2exp(i,j,k,6,1) |
| 3175 |
xx=xx+ 0.0415*tco2(i,j,6,1) |
| 3176 |
|
| 3177 |
tran(i,j)=tran(i,j)*xx |
| 3178 |
|
| 3179 |
enddo |
| 3180 |
enddo |
| 3181 |
|
| 3182 |
c-----for n2o |
| 3183 |
|
| 3184 |
do j=1,n |
| 3185 |
do i=1,m |
| 3186 |
|
| 3187 |
tn2o(i,j,1)=tn2o(i,j,1)*n2oexp(i,j,k,1) |
| 3188 |
xx= 0.970831*tn2o(i,j,1) |
| 3189 |
|
| 3190 |
tn2o(i,j,2)=tn2o(i,j,2)*n2oexp(i,j,k,2) |
| 3191 |
xx=xx+0.029169*tn2o(i,j,2) |
| 3192 |
|
| 3193 |
tran(i,j)=tran(i,j)*(xx-1.0) |
| 3194 |
|
| 3195 |
enddo |
| 3196 |
enddo |
| 3197 |
|
| 3198 |
return |
| 3199 |
end |
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