srtm_taumol27.F90

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SUBROUTINE srtm_taumol27 &
 & ( klev,&
 & p_fac00   , p_fac01  , p_fac10   , p_fac11,&
 & k_jp      , k_jt     , k_jt1     , p_oneminus,&
 & p_colmol  , p_colo3,&
 & k_laytrop,&
 & p_sfluxzen, p_taug   , p_taur    &
 & )  

!     Written by Eli J. Mlawer, Atmospheric & Environmental Research.

!     BAND 27:  29000-38000 cm-1 (low - O3; high - O3)

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

!     JJMorcrette 2003-02-24 adapted to ECMWF environment

!      PARAMETER (MG=16, MXLAY=203, NBANDS=14)

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

USE parsrtm  , ONLY : jplay, jpg, ng27
USE yoesrta27, ONLY : absa, absb &
 & , sfluxrefc, raylc &
 & , layreffr, scalekur  
USE yoesrtwn , ONLY : nspa, nspb

IMPLICIT NONE

!-- Output
INTEGER(KIND=JPIM),INTENT(IN)    :: KLEV 
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)                  :: P_ONEMINUS ! Argument NOT used
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_COLMOL(jplay) 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_COLO3(jplay) 
INTEGER(KIND=JPIM),INTENT(IN)    :: K_LAYTROP 

REAL(KIND=JPRB)   ,INTENT(OUT)   :: P_SFLUXZEN(jpg) 
REAL(KIND=JPRB)   ,INTENT(OUT)   :: P_TAUG(jplay,jpg) 
REAL(KIND=JPRB)   ,INTENT(OUT)   :: P_TAUR(jplay,jpg) 
!- from INTFAC      
!- from INTIND
!- from PRECISE             
!- from PROFDATA             
!- from SELF             
INTEGER(KIND=JPIM) :: IG, IND0, IND1, I_LAY, I_LAYSOLFR, I_NLAYERS

REAL(KIND=JPRB) ::  &
 & Z_TAURAY  
REAL(KIND=JPRB) :: ZHOOK_HANDLE

IF (lhook) CALL dr_hook('SRTM_TAUMOL27',0,zhook_handle)
i_nlayers = klev

!     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
  ind0 = ((k_jp(i_lay)-1)*5+(k_jt(i_lay)-1))*nspa(27) + 1
  ind1 = (k_jp(i_lay)*5+(k_jt1(i_lay)-1))*nspa(27) + 1

!  DO IG = 1, NG(27)
  DO ig = 1 , ng27
    z_tauray = p_colmol(i_lay) * raylc(ig)
    p_taug(i_lay,ig) = p_colo3(i_lay) * &
     & (p_fac00(i_lay) * absa(ind0,ig) + &
     & p_fac10(i_lay) * absa(ind0+1,ig) + &
     & p_fac01(i_lay) * absa(ind1,ig) + &
     & p_fac11(i_lay) * absa(ind1+1,ig))  
!     &          + TAURAY
!    SSA(LAY,IG) = TAURAY/TAUG(LAY,IG)
    p_taur(i_lay,ig) = z_tauray
  ENDDO
ENDDO

i_laysolfr = i_nlayers

DO i_lay = k_laytrop+1, i_nlayers
  IF (k_jp(i_lay-1) < layreffr .AND. k_jp(i_lay) >= layreffr) &
   & i_laysolfr = i_lay  
  ind0 = ((k_jp(i_lay)-13)*5+(k_jt(i_lay)-1))*nspb(27) + 1
  ind1 = ((k_jp(i_lay)-12)*5+(k_jt1(i_lay)-1))*nspb(27) + 1

!  DO IG = 1, NG(27)
  DO ig = 1 , ng27
    z_tauray = p_colmol(i_lay) * raylc(ig)
    p_taug(i_lay,ig) = p_colo3(i_lay) * &
     & (p_fac00(i_lay) * absb(ind0,ig) + &
     & p_fac10(i_lay) * absb(ind0+1,ig) + &
     & p_fac01(i_lay) * absb(ind1,ig) +  &
     & p_fac11(i_lay) * absb(ind1+1,ig))  
!     &          + TAURAY
!    SSA(LAY,IG) = TAURAY/TAUG(LAY,IG)
    IF (i_lay == i_laysolfr) p_sfluxzen(ig) = scalekur * sfluxrefc(ig) 
    p_taur(i_lay,ig) = z_tauray
  ENDDO
ENDDO

!-----------------------------------------------------------------------
IF (lhook) CALL dr_hook('SRTM_TAUMOL27',1,zhook_handle)
END SUBROUTINE srtm_taumol27