rrtm_taumol4.F90

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!----------------------------------------------------------------------------
SUBROUTINE rrtm_taumol4 (KLEV,P_TAU,&
 & p_tauaerl,p_fac00,p_fac01,p_fac10,p_fac11,p_forfac,k_jp,k_jt,k_jt1,p_oneminus,&
 & p_colh2o,p_colco2,p_colo3,k_laytrop,p_selffac,p_selffrac,k_indself,pfrac)  

!     BAND 4:  630-700 cm-1 (low - H2O,CO2; high - O3,CO2)

! Modifications
!        M.Hamrud      01-Oct-2003 CY28 Cleaning

!     D Salmond 2000-05-15 speed-up

USE parkind1  ,ONLY : jpim     ,jprb
USE yomhook   ,ONLY : lhook,   dr_hook

USE parrrtm  , ONLY : jplay  ,jpband ,jpgpt  ,ng4   ,ngs3
USE yoerrtwn , ONLY :      nspa   ,nspb
USE yoerrta4 , ONLY : absa   ,absb   ,fracrefa, fracrefb,selfref,strrat1 , strrat2

!  Input
!#include "yoeratm.h"

!      REAL TAUAER(JPLAY)

IMPLICIT NONE

!  Output
INTEGER(KIND=JPIM),INTENT(IN)    :: KLEV 
REAL(KIND=JPRB)   ,INTENT(OUT)   :: P_TAU(jpgpt,jplay) 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_TAUAERL(jplay,jpband) 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_FAC00(jplay) 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_FAC01(jplay) 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_FAC10(jplay) 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_FAC11(jplay) 
REAL(KIND=JPRB)                  :: P_FORFAC(jplay) ! Argument NOT used
INTEGER(KIND=JPIM),INTENT(IN)    :: K_JP(jplay) 
INTEGER(KIND=JPIM),INTENT(IN)    :: K_JT(jplay) 
INTEGER(KIND=JPIM),INTENT(IN)    :: K_JT1(jplay) 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_ONEMINUS 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_COLH2O(jplay) 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_COLCO2(jplay) 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_COLO3(jplay) 
INTEGER(KIND=JPIM),INTENT(IN)    :: K_LAYTROP 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_SELFFAC(jplay) 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_SELFFRAC(jplay) 
INTEGER(KIND=JPIM),INTENT(IN)    :: K_INDSELF(jplay) 
REAL(KIND=JPRB)   ,INTENT(OUT)   :: PFRAC(jpgpt,jplay) 
!- from AER
!- from INTFAC      
!- from INTIND
!- from PRECISE             
!- from PROFDATA             
!- from SELF             
!- from SP             
INTEGER(KIND=JPIM) :: IJS(jplay)
REAL(KIND=JPRB) :: ZFS(jplay),Z_SPECCOMB(jplay)
INTEGER(KIND=JPIM) :: IND0(jplay),IND1(jplay),INDS(jplay)

INTEGER(KIND=JPIM) :: IG, JS, I_LAY

REAL(KIND=JPRB) :: Z_FAC000, Z_FAC001, Z_FAC010, Z_FAC011, Z_FAC100, Z_FAC101,&
 & Z_FAC110, Z_FAC111, Z_FS, Z_SPECMULT, Z_SPECPARM  
REAL(KIND=JPRB) :: ZHOOK_HANDLE

!      EQUIVALENCE (TAUAERL(1,4),TAUAER)

!     Compute the optical depth by interpolating in ln(pressure), 
!     temperature, and appropriate species.  Below LAYTROP, the water
!     vapor self-continuum is interpolated (in temperature) separately. 
 
IF (lhook) CALL dr_hook('RRTM_TAUMOL4',0,zhook_handle)
DO i_lay = 1, k_laytrop
  z_speccomb(i_lay) = p_colh2o(i_lay) + strrat1*p_colco2(i_lay)
  z_specparm = p_colh2o(i_lay)/z_speccomb(i_lay)
  z_specparm=min(p_oneminus,z_specparm)
  z_specmult = 8._jprb*(z_specparm)
  js = 1 + int(z_specmult)
  z_fs = mod(z_specmult,1.0_jprb)
  ind0(i_lay) = ((k_jp(i_lay)-1)*5+(k_jt(i_lay)-1))*nspa(4) + js
  ind1(i_lay) = (k_jp(i_lay)*5+(k_jt1(i_lay)-1))*nspa(4) + js
  inds(i_lay) = k_indself(i_lay)

  zfs(i_lay)=z_fs
  ijs(i_lay)=js

ENDDO

!-- DS_000515
DO ig = 1, ng4
  DO i_lay = 1, k_laytrop
!-- DS_000515

    z_fs=zfs(i_lay)
    js=ijs(i_lay)
!--jjm         
!    FAC000 = (_ONE_ - FS) * FAC00(LAY)
!    FAC010 = (_ONE_ - FS) * FAC10(LAY)
!    FAC100 = FS * FAC00(LAY)
!    FAC110 = FS * FAC10(LAY)
!    FAC001 = (_ONE_ - FS) * FAC01(LAY)
!    FAC011 = (_ONE_ - FS) * FAC11(LAY)
!    FAC101 = FS * FAC01(LAY)
!    FAC111 = FS * FAC11(LAY)
!---

    p_tau(ngs3+ig,i_lay) = z_speccomb(i_lay) *    &
     !-- DS_000515
     & ((1. - z_fs) *(p_fac00(i_lay) * absa(ind0(i_lay)   ,ig) +   &
     & p_fac10(i_lay) * absa(ind0(i_lay)+ 9,ig) +   &
     & p_fac01(i_lay) * absa(ind1(i_lay)   ,ig) +    &
     & p_fac11(i_lay) * absa(ind1(i_lay)+ 9,ig))+   &
     & z_fs     *(p_fac00(i_lay) * absa(ind0(i_lay)+ 1,ig) +   &
     & p_fac10(i_lay) * absa(ind0(i_lay)+10,ig) +   &
     & p_fac01(i_lay) * absa(ind1(i_lay)+ 1,ig) +   &
     & p_fac11(i_lay) * absa(ind1(i_lay)+10,ig))) + &
     !     &(Z_FAC000 * ABSA(IND0(I_LAY)   ,IG) +&
     !     & Z_FAC100 * ABSA(IND0(I_LAY)+ 1,IG) +&
     !     & Z_FAC010 * ABSA(IND0(I_LAY)+ 9,IG) +&
     !     & Z_FAC110 * ABSA(IND0(I_LAY)+10,IG) +&
     !     & Z_FAC001 * ABSA(IND1(I_LAY)   ,IG) +&
     !     & Z_FAC101 * ABSA(IND1(I_LAY)+ 1,IG) +&
     !     & Z_FAC011 * ABSA(IND1(I_LAY)+ 9,IG) +&
     !     & Z_FAC111 * ABSA(IND1(I_LAY)+10,IG))+&
     !-- DS_000515
     & p_colh2o(i_lay) * &
     & p_selffac(i_lay) * (selfref(inds(i_lay),ig) + &
     & p_selffrac(i_lay) *&
     & (selfref(inds(i_lay)+1,ig) - selfref(inds(i_lay),ig)))&
     & + p_tauaerl(i_lay,4)  
    pfrac(ngs3+ig,i_lay) = fracrefa(ig,js) + z_fs *&
     & (fracrefa(ig,js+1) - fracrefa(ig,js))  
  ENDDO
ENDDO

DO i_lay = k_laytrop+1, klev
  z_speccomb(i_lay) = p_colo3(i_lay) + strrat2*p_colco2(i_lay)
  z_specparm = p_colo3(i_lay)/z_speccomb(i_lay)
  z_specparm=min(p_oneminus,z_specparm)
  z_specmult = 4._jprb*(z_specparm)
  js = 1 + int(z_specmult)
  z_fs = mod(z_specmult,1.0_jprb)
  IF (js  >  1) THEN
    js = js + 1
  ELSEIF (z_fs  >=  0.0024_jprb) THEN
    js = 2
    z_fs = (z_fs - 0.0024_jprb)/0.9976_jprb
  ELSE
    js = 1
    z_fs = z_fs/0.0024_jprb
  ENDIF
  ind0(i_lay) = ((k_jp(i_lay)-13)*5+(k_jt(i_lay)-1))*nspb(4) + js
  ind1(i_lay) = ((k_jp(i_lay)-12)*5+(k_jt1(i_lay)-1))*nspb(4) + js
  zfs(i_lay)=z_fs
  ijs(i_lay)=js
ENDDO

DO i_lay = k_laytrop+1, klev
  z_fs=zfs(i_lay)
  js=ijs(i_lay)
!--- jjm
!  FAC000 = (_ONE_ - FS) * FAC00(LAY)
!  FAC010 = (_ONE_ - FS) * FAC10(LAY)
!  FAC100 = FS * FAC00(LAY)
!  FAC110 = FS * FAC10(LAY)
!  FAC001 = (_ONE_ - FS) * FAC01(LAY)
!  FAC011 = (_ONE_ - FS) * FAC11(LAY)
!  FAC101 = FS * FAC01(LAY)
!  FAC111 = FS * FAC11(LAY)
!------                   
  DO ig = 1, ng4
    p_tau(ngs3+ig,i_lay) = z_speccomb(i_lay) *   &
     !-- DS_000515
     & ( (1. - z_fs) *(p_fac00(i_lay) * absb(ind0(i_lay)  ,ig) +   &
     & p_fac10(i_lay) * absb(ind0(i_lay)+6,ig) +   &
     & p_fac01(i_lay) * absb(ind1(i_lay)  ,ig) +    &
     & p_fac11(i_lay) * absb(ind1(i_lay)+6,ig))+   &
     & z_fs     *(p_fac00(i_lay) * absb(ind0(i_lay)+1,ig) +   &
     & p_fac10(i_lay) * absb(ind0(i_lay)+7,ig) +   &
     & p_fac01(i_lay) * absb(ind1(i_lay)+1,ig) +   &
     & p_fac11(i_lay) * absb(ind1(i_lay)+7,ig)))   &
     !     &(Z_FAC000 * ABSB(IND0(I_LAY)   ,IG) +&
     !     & Z_FAC100 * ABSB(IND0(I_LAY)+ 1,IG) +&
     !     & Z_FAC010 * ABSB(IND0(I_LAY)+ 6,IG) +&
     !     & Z_FAC110 * ABSB(IND0(I_LAY)+ 7,IG) +&
     !     & Z_FAC001 * ABSB(IND1(I_LAY)   ,IG) +&
     !     & Z_FAC101 * ABSB(IND1(I_LAY)+ 1,IG) +&
     !     & Z_FAC011 * ABSB(IND1(I_LAY)+ 6,IG) +&
     !     & Z_FAC111 * ABSB(IND1(I_LAY)+ 7,IG))&
     !-- DS_000515
     & + p_tauaerl(i_lay,4)  
    pfrac(ngs3+ig,i_lay) = fracrefb(ig,js) + z_fs *&
     & (fracrefb(ig,js+1) - fracrefb(ig,js))  
  ENDDO
ENDDO

IF (lhook) CALL dr_hook('RRTM_TAUMOL4',1,zhook_handle)
END SUBROUTINE rrtm_taumol4