rrtm_taumol9.F90

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!----------------------------------------------------------------------------
SUBROUTINE rrtm_taumol9 (KLEV,P_TAU,&
 & p_tauaerl,p_fac00,p_fac01,p_fac10,p_fac11,k_jp,k_jt,k_jt1,p_oneminus,&
 & p_colh2o,p_coln2o,p_colch4,k_laytrop,k_layswtch,k_laylow,p_selffac,p_selffrac,k_indself,pfrac)  

!     BAND 9:  1180-1390 cm-1 (low - H2O,CH4; high - CH4)

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

!     D Salmond   2000-05-15 speed-up
!     JJMorcrette 2000-05-17 speed-up

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

USE parrrtm  , ONLY : jplay  ,jpband ,jpgpt  ,ng9   ,ngs8
USE yoerrtwn , ONLY :      nspa   ,nspb
USE yoerrta9 , ONLY : absa   ,absb   ,fracrefa, fracrefb,selfref,absn2o  , ch4ref  ,&
 & etaref  , h2oref ,n2oref ,strrat  

!  Input
!#include "yoeratm.h"

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) 
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_COLN2O(jplay) 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_COLCH4(jplay) 
INTEGER(KIND=JPIM),INTENT(IN)    :: K_LAYTROP 
INTEGER(KIND=JPIM),INTENT(IN)    :: K_LAYSWTCH 
INTEGER(KIND=JPIM),INTENT(IN)    :: K_LAYLOW 
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) :: JFRAC(jplay)
REAL(KIND=JPRB) :: Z_FFRAC(jplay),ZFS(jplay),Z_SPECCOMB(jplay)
INTEGER(KIND=JPIM) :: IND0(jplay),IND1(jplay),INDS(jplay),IIOFF(jplay)

!      REAL TAUAER(JPLAY)
REAL(KIND=JPRB) :: Z_N2OMULT(jplay)

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

REAL(KIND=JPRB) :: Z_COLREF1, Z_COLREF2, Z_CURRN2O, Z_FAC000, Z_FAC001,&
 & Z_FAC010, Z_FAC011, Z_FAC100, Z_FAC101, Z_FAC110, Z_FAC111, &
 & Z_FP, Z_FS, Z_RATIO, Z_SPECMULT, Z_SPECPARM, Z_WCOMB1, &
 & Z_WCOMB2  
REAL(KIND=JPRB) :: ZHOOK_HANDLE

!      EQUIVALENCE (TAUAERL(1,9),TAUAER)

IF (lhook) CALL dr_hook('RRTM_TAUMOL9',0,zhook_handle)
ioff = 0

!     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.
  
DO i_lay = 1, k_laytrop
  z_speccomb(i_lay) = p_colh2o(i_lay) + strrat*p_colch4(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)
  jfrac(i_lay) = js
  z_fs = mod(z_specmult,1.0_jprb)
  z_ffrac(i_lay) = z_fs
  IF (js  ==  8) THEN
    IF (z_fs <= 0.68_jprb) THEN
      z_fs = z_fs/0.68_jprb
    ELSEIF (z_fs  <=  0.92_jprb) THEN
      js = js + 1
      z_fs = (z_fs-0.68_jprb)/0.24_jprb
    ELSE
      js = js + 2
      z_fs = (z_fs-0.92_jprb)/0.08_jprb
    ENDIF
  ELSEIF (js  == 9) THEN
    js = 10
    z_fs = 1.0_jprb
    jfrac(i_lay) = 8
    z_ffrac(i_lay) = 1.0_jprb
  ENDIF
  z_fp = p_fac01(i_lay) + p_fac11(i_lay)
  i_ns = js + int(z_fs + 0.5_jprb)
  ind0(i_lay) = ((k_jp(i_lay)-1)*5+(k_jt(i_lay)-1))*nspa(9) + js
  ind1(i_lay) = (k_jp(i_lay)*5+(k_jt1(i_lay)-1))*nspa(9) + js
  inds(i_lay) = k_indself(i_lay)
  IF (i_lay  ==  k_laylow) ioff = ng9
  IF (i_lay  ==  k_layswtch) ioff = 2*ng9
  z_colref1 = n2oref(k_jp(i_lay))
  z_colref2 = n2oref(k_jp(i_lay)+1)
  IF (i_ns  ==  11) THEN
    z_wcomb1 = 1.0_jprb/h2oref(k_jp(i_lay))
    z_wcomb2 = 1.0_jprb/h2oref(k_jp(i_lay)+1)
  ELSE
    z_wcomb1 = (1.0_jprb-etaref(i_ns))/(strrat * ch4ref(k_jp(i_lay)))
    z_wcomb2 = (1.0_jprb-etaref(i_ns))/(strrat * ch4ref(k_jp(i_lay)+1))
  ENDIF
  z_ratio = (z_colref1*z_wcomb1)+z_fp*((z_colref2*z_wcomb2)-(z_colref1*z_wcomb1))
  z_currn2o = z_speccomb(i_lay) * z_ratio
  z_n2omult(i_lay) = p_coln2o(i_lay) - z_currn2o

  zfs(i_lay)=z_fs
  iioff(i_lay)=ioff

ENDDO

!-- DS_000515
DO ig = 1, ng9
  DO i_lay = 1, k_laytrop
!-- DS_000515

    z_fs=zfs(i_lay)
    ioff=iioff(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(ngs8+ig,i_lay) = z_speccomb(i_lay) *&
     !-- DS_000515
     !     &(Z_FAC000 * ABSA(IND0(I_LAY)   ,IG) +&
     !     & Z_FAC100 * ABSA(IND0(I_LAY)+ 1,IG) +&
     !     & Z_FAC010 * ABSA(IND0(I_LAY)+11,IG) +&
     !     & Z_FAC110 * ABSA(IND0(I_LAY)+12,IG) +&
     !     & Z_FAC001 * ABSA(IND1(I_LAY)   ,IG) +&
     !     & Z_FAC101 * ABSA(IND1(I_LAY)+ 1,IG) +&
     !     & Z_FAC011 * ABSA(IND1(I_LAY)+11,IG) +&
     !     & Z_FAC111 * ABSA(IND1(I_LAY)+12,IG))+&
     & ( (1. - z_fs) *(p_fac00(i_lay) * absa(ind0(i_lay)   ,ig) +   &
     & p_fac10(i_lay) * absa(ind0(i_lay)+11,ig) +   &
     & p_fac01(i_lay) * absa(ind1(i_lay)   ,ig) +   &
     & p_fac11(i_lay) * absa(ind1(i_lay)+11,ig))+   &
     & z_fs     *(p_fac00(i_lay) * absa(ind0(i_lay)+ 1,ig) +   &
     & p_fac10(i_lay) * absa(ind0(i_lay)+12,ig) +   &
     & p_fac01(i_lay) * absa(ind1(i_lay)+ 1,ig) +   &
     & p_fac11(i_lay) * absa(ind1(i_lay)+12,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)))&
     & + z_n2omult(i_lay) * absn2o(ig+ioff)&
     & + p_tauaerl(i_lay,9)  
    pfrac(ngs8+ig,i_lay) = fracrefa(ig,jfrac(i_lay)) + z_ffrac(i_lay) *&
     & (fracrefa(ig,jfrac(i_lay)+1) - fracrefa(ig,jfrac(i_lay)))  
  ENDDO
ENDDO

DO i_lay = k_laytrop+1, klev
  ind0(i_lay) = ((k_jp(i_lay)-13)*5+(k_jt(i_lay)-1))*nspb(9) + 1
  ind1(i_lay) = ((k_jp(i_lay)-12)*5+(k_jt1(i_lay)-1))*nspb(9) + 1
ENDDO

!-- JJM_000517
DO ig = 1, ng9
  DO i_lay = k_laytrop+1, klev
!-- JJM_000517
    p_tau(ngs8+ig,i_lay) = p_colch4(i_lay) *&
     & (p_fac00(i_lay) * absb(ind0(i_lay)  ,ig) +&
     & p_fac10(i_lay) * absb(ind0(i_lay)+1,ig) +&
     & p_fac01(i_lay) * absb(ind1(i_lay)  ,ig) +&
     & p_fac11(i_lay) * absb(ind1(i_lay)+1,ig))&
     & + p_tauaerl(i_lay,9)  
    pfrac(ngs8+ig,i_lay) = fracrefb(ig)
  ENDDO
ENDDO

IF (lhook) CALL dr_hook('RRTM_TAUMOL9',1,zhook_handle)
END SUBROUTINE rrtm_taumol9