srtm_taumol22.F90

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SUBROUTINE srtm_taumol22 &
 & ( klev,&
 & p_fac00   , p_fac01  , p_fac10   , p_fac11,&
 & k_jp      , k_jt     , k_jt1     , p_oneminus,&
 & p_colh2o  , p_colmol , p_colo2,&
 & k_laytrop , p_selffac, p_selffrac, k_indself  , p_forfac, p_forfrac, k_indfor,&
 & p_sfluxzen, p_taug   , p_taur    &
 & )  

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

!     BAND 22:  7700-8050 cm-1 (low - H2O,O2; high - O2)

! 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, ng22
USE yoesrta22, ONLY : absa, absb, forrefc, selfrefc &
 & , sfluxrefc, rayl &
 & , layreffr, strrat  
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)   ,INTENT(IN)    :: P_ONEMINUS 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_COLH2O(jplay) 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_COLMOL(jplay) 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_COLO2(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(IN)    :: P_FORFAC(jplay) 
REAL(KIND=JPRB)   ,INTENT(IN)    :: P_FORFRAC(jplay) 
INTEGER(KIND=JPIM),INTENT(IN)    :: K_INDFOR(jplay) 

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, INDS, INDF, JS, I_LAY, I_LAYSOLFR, I_NLAYERS

REAL(KIND=JPRB) :: Z_FAC000, Z_FAC001, Z_FAC010, Z_FAC011, Z_FAC100, Z_FAC101,&
 & Z_FAC110, Z_FAC111, Z_FS, Z_SPECCOMB, Z_SPECMULT, Z_SPECPARM, &
 & Z_TAURAY, Z_O2ADJ , Z_O2CONT  
REAL(KIND=JPRB) :: ZHOOK_HANDLE

IF (lhook) CALL dr_hook('SRTM_TAUMOL22',0,zhook_handle)
i_nlayers = klev

!     The following factor is the ratio of total O2 band intensity (lines 
!     and Mate continuum) to O2 band intensity (line only).  It is needed
!     to adjust the optical depths since the k's include only lines.
z_o2adj = 1.6_jprb
      
!     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.  

i_laysolfr = k_laytrop

DO i_lay = 1, k_laytrop
  IF (k_jp(i_lay) < layreffr .AND. k_jp(i_lay+1) >= layreffr) &
   & i_laysolfr = min(i_lay+1,k_laytrop)  
  z_o2cont = 4.35e-4*p_colo2(i_lay)/(350.0*2.0)
  z_speccomb = p_colh2o(i_lay) + z_o2adj*strrat*p_colo2(i_lay)
  z_specparm = p_colh2o(i_lay)/z_speccomb 
  IF (z_specparm >= p_oneminus) z_specparm = p_oneminus
  z_specmult = 8.*(z_specparm)
!         ODADJ = SPECPARM + O2ADJ * (1. - SPECPARM)
  js = 1 + int(z_specmult)
  z_fs = mod(z_specmult, 1.0_jprb )
! Z_FAC000 = (1. - Z_FS) * P_FAC00(I_LAY)
! Z_FAC010 = (1. - Z_FS) * P_FAC10(I_LAY)
! Z_FAC100 = Z_FS * P_FAC00(I_LAY)
! Z_FAC110 = Z_FS * P_FAC10(I_LAY)
! Z_FAC001 = (1. - Z_FS) * P_FAC01(I_LAY)
! Z_FAC011 = (1. - Z_FS) * P_FAC11(I_LAY)
! Z_FAC101 = Z_FS * P_FAC01(I_LAY)
! Z_FAC111 = Z_FS * P_FAC11(I_LAY)
  ind0 = ((k_jp(i_lay)-1)*5+(k_jt(i_lay)-1))*nspa(22) + js
  ind1 = (k_jp(i_lay)*5+(k_jt1(i_lay)-1))*nspa(22) + js
  inds = k_indself(i_lay)
  indf = k_indfor(i_lay)
  z_tauray = p_colmol(i_lay) * rayl

!  DO IG = 1, NG(22)
  DO ig = 1 , ng22
    p_taug(i_lay,ig) = z_speccomb * &
!    & (Z_FAC000 * ABSA(IND0,IG) + &
!    & Z_FAC100 * ABSA(IND0+1,IG) + &
!    & Z_FAC010 * ABSA(IND0+9,IG) + &
!    & Z_FAC110 * ABSA(IND0+10,IG) + &
!    & Z_FAC001 * ABSA(IND1,IG) + &
!    & Z_FAC101 * ABSA(IND1+1,IG) + &
!    & Z_FAC011 * ABSA(IND1+9,IG) + &
!    & Z_FAC111 * ABSA(IND1+10,IG)) + &
     & (&
     & (1. - z_fs) * ( absa(ind0,ig) * p_fac00(i_lay) + &
     &                 absa(ind0+9,ig) * p_fac10(i_lay) + &
     &                 absa(ind1,ig) * p_fac01(i_lay) + &
     &                 absa(ind1+9,ig) * p_fac11(i_lay) ) + &
     & z_fs        * ( absa(ind0+1,ig) * p_fac00(i_lay) + &
     &                 absa(ind0+10,ig) * p_fac10(i_lay) + &
     &                 absa(ind1+1,ig) * p_fac01(i_lay) + &
     &                 absa(ind1+10,ig) * p_fac11(i_lay) ) &
     & ) + &
     & p_colh2o(i_lay) * &
     & (p_selffac(i_lay) * (selfrefc(inds,ig) + &
     & p_selffrac(i_lay) * &
     & (selfrefc(inds+1,ig) - selfrefc(inds,ig))) + &
     & p_forfac(i_lay) * (forrefc(indf,ig) + &
     & p_forfrac(i_lay) * &
     & (forrefc(indf+1,ig) - forrefc(indf,ig)))) &
     & + z_o2cont  
!     &          + TAURAY
!    SSA(LAY,IG) = TAURAY/TAUG(LAY,IG)
    IF (i_lay == i_laysolfr) p_sfluxzen(ig) = sfluxrefc(ig,js) &
     & + z_fs * (sfluxrefc(ig,js+1) - sfluxrefc(ig,js))  
    p_taur(i_lay,ig) = z_tauray
  ENDDO
ENDDO

DO i_lay = k_laytrop+1, i_nlayers
  z_o2cont = 4.35e-4*p_colo2(i_lay)/(350.0*2.0)
  ind0 = ((k_jp(i_lay)-13)*5+(k_jt(i_lay)-1))*nspb(22) + 1
  ind1 = ((k_jp(i_lay)-12)*5+(k_jt1(i_lay)-1))*nspb(22) + 1
  z_tauray = p_colmol(i_lay) * rayl

!  DO IG = 1, NG(22)
  DO ig = 1 , ng22
    p_taug(i_lay,ig) = p_colo2(i_lay) * z_o2adj * &
     & (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)) + &
     & z_o2cont  
!     &           + TAURAY
!    SSA(LAY,IG) = TAURAY/TAUG(LAY,IG)
    p_taur(i_lay,ig) = z_tauray
  ENDDO
ENDDO

!-----------------------------------------------------------------------
IF (lhook) CALL dr_hook('SRTM_TAUMOL22',1,zhook_handle)
END SUBROUTINE srtm_taumol22