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rrtmg_lw_taumol.f90
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rrtmg_lw_taumol.f90
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! path: $Source: /storm/rc1/cvsroot/rc/rrtmg_lw/src/rrtmg_lw_taumol.f90,v $
! author: $Author: mike $
! revision: $Revision: 1.7 $
! created: $Date: 2009/10/20 15:08:37 $
!
module rrtmg_lw_taumol
! --------------------------------------------------------------------------
! | |
! | Copyright 2002-2009, Atmospheric & Environmental Research, Inc. (AER). |
! | This software may be used, copied, or redistributed as long as it is |
! | not sold and this copyright notice is reproduced on each copy made. |
! | This model is provided as is without any express or implied warranties. |
! | (http://www.rtweb.aer.com/) |
! | |
! --------------------------------------------------------------------------
! ------- Modules -------
use shr_kind_mod, only: r8 => shr_kind_r8
! use parkind, only : im => kind_im, rb => kind_r8
use parrrtm, only : mg, nbndlw, maxxsec, ngptlw
use rrlw_con, only: oneminus
use rrlw_wvn, only: nspa, nspb
use rrlw_vsn, only: hvrtau, hnamtau
implicit none
contains
!----------------------------------------------------------------------------
subroutine taumol(nlayers, pavel, wx, coldry, &
laytrop, jp, jt, jt1, planklay, planklev, plankbnd, &
colh2o, colco2, colo3, coln2o, colco, colch4, colo2, &
colbrd, fac00, fac01, fac10, fac11, &
rat_h2oco2, rat_h2oco2_1, rat_h2oo3, rat_h2oo3_1, &
rat_h2on2o, rat_h2on2o_1, rat_h2och4, rat_h2och4_1, &
rat_n2oco2, rat_n2oco2_1, rat_o3co2, rat_o3co2_1, &
selffac, selffrac, indself, forfac, forfrac, indfor, &
minorfrac, scaleminor, scaleminorn2, indminor, &
fracs, taug)
!----------------------------------------------------------------------------
! *******************************************************************************
! * *
! * Optical depths developed for the *
! * *
! * RAPID RADIATIVE TRANSFER MODEL (RRTM) *
! * *
! * *
! * ATMOSPHERIC AND ENVIRONMENTAL RESEARCH, INC. *
! * 131 HARTWELL AVENUE *
! * LEXINGTON, MA 02421 *
! * *
! * *
! * ELI J. MLAWER *
! * JENNIFER DELAMERE *
! * STEVEN J. TAUBMAN *
! * SHEPARD A. CLOUGH *
! * *
! * *
! * *
! * *
! * email: mlawer@aer.com *
! * email: jdelamer@aer.com *
! * *
! * The authors wish to acknowledge the contributions of the *
! * following people: Karen Cady-Pereira, Patrick D. Brown, *
! * Michael J. Iacono, Ronald E. Farren, Luke Chen, Robert Bergstrom. *
! * *
! *******************************************************************************
! * *
! * Revision for g-point reduction: Michael J. Iacono, AER, Inc. *
! * *
! *******************************************************************************
! * TAUMOL *
! * *
! * This file contains the subroutines TAUGBn (where n goes from *
! * 1 to 16). TAUGBn calculates the optical depths and Planck fractions *
! * per g-value and layer for band n. *
! * *
! * Output: optical depths (unitless) *
! * fractions needed to compute Planck functions at every layer *
! * and g-value *
! * *
! * COMMON /TAUGCOM/ TAUG(MXLAY,MG) *
! * COMMON /PLANKG/ FRACS(MXLAY,MG) *
! * *
! * Input *
! * *
! * COMMON /FEATURES/ NG(NBANDS),NSPA(NBANDS),NSPB(NBANDS) *
! * COMMON /PRECISE/ ONEMINUS *
! * COMMON /PROFILE/ NLAYERS,PAVEL(MXLAY),TAVEL(MXLAY), *
! * & PZ(0:MXLAY),TZ(0:MXLAY) *
! * COMMON /PROFDATA/ LAYTROP, *
! * & COLH2O(MXLAY),COLCO2(MXLAY),COLO3(MXLAY), *
! * & COLN2O(MXLAY),COLCO(MXLAY),COLCH4(MXLAY), *
! * & COLO2(MXLAY)
! * COMMON /INTFAC/ FAC00(MXLAY),FAC01(MXLAY), *
! * & FAC10(MXLAY),FAC11(MXLAY) *
! * COMMON /INTIND/ JP(MXLAY),JT(MXLAY),JT1(MXLAY) *
! * COMMON /SELF/ SELFFAC(MXLAY), SELFFRAC(MXLAY), INDSELF(MXLAY) *
! * *
! * Description: *
! * NG(IBAND) - number of g-values in band IBAND *
! * NSPA(IBAND) - for the lower atmosphere, the number of reference *
! * atmospheres that are stored for band IBAND per *
! * pressure level and temperature. Each of these *
! * atmospheres has different relative amounts of the *
! * key species for the band (i.e. different binary *
! * species parameters). *
! * NSPB(IBAND) - same for upper atmosphere *
! * ONEMINUS - since problems are caused in some cases by interpolation *
! * parameters equal to or greater than 1, for these cases *
! * these parameters are set to this value, slightly < 1. *
! * PAVEL - layer pressures (mb) *
! * TAVEL - layer temperatures (degrees K) *
! * PZ - level pressures (mb) *
! * TZ - level temperatures (degrees K) *
! * LAYTROP - layer at which switch is made from one combination of *
! * key species to another *
! * COLH2O, COLCO2, COLO3, COLN2O, COLCH4 - column amounts of water *
! * vapor,carbon dioxide, ozone, nitrous ozide, methane, *
! * respectively (molecules/cm**2) *
! * FACij(LAY) - for layer LAY, these are factors that are needed to *
! * compute the interpolation factors that multiply the *
! * appropriate reference k-values. A value of 0 (1) for *
! * i,j indicates that the corresponding factor multiplies *
! * reference k-value for the lower (higher) of the two *
! * appropriate temperatures, and altitudes, respectively. *
! * JP - the index of the lower (in altitude) of the two appropriate *
! * reference pressure levels needed for interpolation *
! * JT, JT1 - the indices of the lower of the two appropriate reference *
! * temperatures needed for interpolation (for pressure *
! * levels JP and JP+1, respectively) *
! * SELFFAC - scale factor needed for water vapor self-continuum, equals *
! * (water vapor density)/(atmospheric density at 296K and *
! * 1013 mb) *
! * SELFFRAC - factor needed for temperature interpolation of reference *
! * water vapor self-continuum data *
! * INDSELF - index of the lower of the two appropriate reference *
! * temperatures needed for the self-continuum interpolation *
! * FORFAC - scale factor needed for water vapor foreign-continuum. *
! * FORFRAC - factor needed for temperature interpolation of reference *
! * water vapor foreign-continuum data *
! * INDFOR - index of the lower of the two appropriate reference *
! * temperatures needed for the foreign-continuum interpolation *
! * *
! * Data input *
! * COMMON /Kn/ KA(NSPA(n),5,13,MG), KB(NSPB(n),5,13:59,MG), SELFREF(10,MG),*
! * FORREF(4,MG), KA_M'MGAS', KB_M'MGAS' *
! * (note: n is the band number,'MGAS' is the species name of the minor *
! * gas) *
! * *
! * Description: *
! * KA - k-values for low reference atmospheres (key-species only) *
! * (units: cm**2/molecule) *
! * KB - k-values for high reference atmospheres (key-species only) *
! * (units: cm**2/molecule) *
! * KA_M'MGAS' - k-values for low reference atmosphere minor species *
! * (units: cm**2/molecule) *
! * KB_M'MGAS' - k-values for high reference atmosphere minor species *
! * (units: cm**2/molecule) *
! * SELFREF - k-values for water vapor self-continuum for reference *
! * atmospheres (used below LAYTROP) *
! * (units: cm**2/molecule) *
! * FORREF - k-values for water vapor foreign-continuum for reference *
! * atmospheres (used below/above LAYTROP) *
! * (units: cm**2/molecule) *
! * *
! * DIMENSION ABSA(65*NSPA(n),MG), ABSB(235*NSPB(n),MG) *
! * EQUIVALENCE (KA,ABSA),(KB,ABSB) *
! * *
!*******************************************************************************
! ------- Declarations -------
! ----- Input -----
integer, intent(in) :: nlayers ! total number of layers
real(kind=r8), intent(in) :: pavel(:) ! layer pressures (mb)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: wx(:,:) ! cross-section amounts (mol/cm2)
! Dimensions: (maxxsec,nlayers)
real(kind=r8), intent(in) :: coldry(:) ! column amount (dry air)
! Dimensions: (nlayers)
integer, intent(in) :: laytrop ! tropopause layer index
integer, intent(in) :: jp(:) !
! Dimensions: (nlayers)
integer, intent(in) :: jt(:) !
! Dimensions: (nlayers)
integer, intent(in) :: jt1(:) !
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: planklay(:,:) !
! Dimensions: (nlayers,nbndlw)
real(kind=r8), intent(in) :: planklev(0:,:) !
! Dimensions: (nlayers,nbndlw)
real(kind=r8), intent(in) :: plankbnd(:) !
! Dimensions: (nbndlw)
real(kind=r8), intent(in) :: colh2o(:) ! column amount (h2o)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: colco2(:) ! column amount (co2)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: colo3(:) ! column amount (o3)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: coln2o(:) ! column amount (n2o)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: colco(:) ! column amount (co)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: colch4(:) ! column amount (ch4)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: colo2(:) ! column amount (o2)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: colbrd(:) ! column amount (broadening gases)
! Dimensions: (nlayers)
integer, intent(in) :: indself(:)
! Dimensions: (nlayers)
integer, intent(in) :: indfor(:)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: selffac(:)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: selffrac(:)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: forfac(:)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: forfrac(:)
! Dimensions: (nlayers)
integer, intent(in) :: indminor(:)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: minorfrac(:)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: scaleminor(:)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: scaleminorn2(:)
! Dimensions: (nlayers)
real(kind=r8), intent(in) :: & !
fac00(:), fac01(:), & ! Dimensions: (nlayers)
fac10(:), fac11(:)
real(kind=r8), intent(in) :: & !
rat_h2oco2(:),rat_h2oco2_1(:), &
rat_h2oo3(:),rat_h2oo3_1(:), & ! Dimensions: (nlayers)
rat_h2on2o(:),rat_h2on2o_1(:), &
rat_h2och4(:),rat_h2och4_1(:), &
rat_n2oco2(:),rat_n2oco2_1(:), &
rat_o3co2(:),rat_o3co2_1(:)
! ----- Output -----
real(kind=r8), intent(out) :: fracs(:,:) ! planck fractions
! Dimensions: (nlayers,ngptlw)
real(kind=r8), intent(out) :: taug(:,:) ! gaseous optical depth
! Dimensions: (nlayers,ngptlw)
hvrtau = '$Revision: 1.7 $'
! Calculate gaseous optical depth and planck fractions for each spectral band.
call taugb1
call taugb2
call taugb3
call taugb4
call taugb5
call taugb6
call taugb7
call taugb8
call taugb9
call taugb10
call taugb11
call taugb12
call taugb13
call taugb14
call taugb15
call taugb16
contains
!----------------------------------------------------------------------------
subroutine taugb1
!----------------------------------------------------------------------------
! ------- Modifications -------
! Written by Eli J. Mlawer, Atmospheric & Environmental Research.
! Revised by Michael J. Iacono, Atmospheric & Environmental Research.
!
! band 1: 10-350 cm-1 (low key - h2o; low minor - n2)
! (high key - h2o; high minor - n2)
!
! note: previous versions of rrtm band 1:
! 10-250 cm-1 (low - h2o; high - h2o)
!----------------------------------------------------------------------------
! ------- Modules -------
use parrrtm, only : ng1
use rrlw_kg01, only : fracrefa, fracrefb, absa, absb, &
ka_mn2, kb_mn2, selfref, forref
! ------- Declarations -------
! Local
integer :: lay, ind0, ind1, inds, indf, indm, ig
real(kind=r8) :: pp, corradj, scalen2, tauself, taufor, taun2
! Minor gas mapping levels:
! lower - n2, p = 142.5490 mbar, t = 215.70 k
! upper - n2, p = 142.5490 mbar, t = 215.70 k
! Compute the optical depth by interpolating in ln(pressure) and
! temperature. Below laytrop, the water vapor self-continuum and
! foreign continuum is interpolated (in temperature) separately.
! Lower atmosphere loop
do lay = 1, laytrop
ind0 = ((jp(lay)-1)*5+(jt(lay)-1))*nspa(1) + 1
ind1 = (jp(lay)*5+(jt1(lay)-1))*nspa(1) + 1
inds = indself(lay)
indf = indfor(lay)
indm = indminor(lay)
pp = pavel(lay)
corradj = 1.
if (pp .lt. 250._r8) then
corradj = 1._r8 - 0.15_r8 * (250._r8-pp) / 154.4_r8
endif
scalen2 = colbrd(lay) * scaleminorn2(lay)
do ig = 1, ng1
tauself = selffac(lay) * (selfref(inds,ig) + selffrac(lay) * &
(selfref(inds+1,ig) - selfref(inds,ig)))
taufor = forfac(lay) * (forref(indf,ig) + forfrac(lay) * &
(forref(indf+1,ig) - forref(indf,ig)))
taun2 = scalen2*(ka_mn2(indm,ig) + &
minorfrac(lay) * (ka_mn2(indm+1,ig) - ka_mn2(indm,ig)))
taug(lay,ig) = corradj * (colh2o(lay) * &
(fac00(lay) * absa(ind0,ig) + &
fac10(lay) * absa(ind0+1,ig) + &
fac01(lay) * absa(ind1,ig) + &
fac11(lay) * absa(ind1+1,ig)) &
+ tauself + taufor + taun2)
fracs(lay,ig) = fracrefa(ig)
enddo
enddo
! Upper atmosphere loop
do lay = laytrop+1, nlayers
ind0 = ((jp(lay)-13)*5+(jt(lay)-1))*nspb(1) + 1
ind1 = ((jp(lay)-12)*5+(jt1(lay)-1))*nspb(1) + 1
indf = indfor(lay)
indm = indminor(lay)
pp = pavel(lay)
corradj = 1._r8 - 0.15_r8 * (pp / 95.6_r8)
scalen2 = colbrd(lay) * scaleminorn2(lay)
do ig = 1, ng1
taufor = forfac(lay) * (forref(indf,ig) + &
forfrac(lay) * (forref(indf+1,ig) - forref(indf,ig)))
taun2 = scalen2*(kb_mn2(indm,ig) + &
minorfrac(lay) * (kb_mn2(indm+1,ig) - kb_mn2(indm,ig)))
taug(lay,ig) = corradj * (colh2o(lay) * &
(fac00(lay) * absb(ind0,ig) + &
fac10(lay) * absb(ind0+1,ig) + &
fac01(lay) * absb(ind1,ig) + &
fac11(lay) * absb(ind1+1,ig)) &
+ taufor + taun2)
fracs(lay,ig) = fracrefb(ig)
enddo
enddo
end subroutine taugb1
!----------------------------------------------------------------------------
subroutine taugb2
!----------------------------------------------------------------------------
!
! band 2: 350-500 cm-1 (low key - h2o; high key - h2o)
!
! note: previous version of rrtm band 2:
! 250 - 500 cm-1 (low - h2o; high - h2o)
!----------------------------------------------------------------------------
! ------- Modules -------
use parrrtm, only : ng2, ngs1
use rrlw_kg02, only : fracrefa, fracrefb, absa, absb, &
selfref, forref
! ------- Declarations -------
! Local
integer :: lay, ind0, ind1, inds, indf, ig
real(kind=r8) :: pp, corradj, tauself, taufor
! Compute the optical depth by interpolating in ln(pressure) and
! temperature. Below laytrop, the water vapor self-continuum and
! foreign continuum is interpolated (in temperature) separately.
! Lower atmosphere loop
do lay = 1, laytrop
ind0 = ((jp(lay)-1)*5+(jt(lay)-1))*nspa(2) + 1
ind1 = (jp(lay)*5+(jt1(lay)-1))*nspa(2) + 1
inds = indself(lay)
indf = indfor(lay)
pp = pavel(lay)
corradj = 1._r8 - .05_r8 * (pp - 100._r8) / 900._r8
do ig = 1, ng2
tauself = selffac(lay) * (selfref(inds,ig) + selffrac(lay) * &
(selfref(inds+1,ig) - selfref(inds,ig)))
taufor = forfac(lay) * (forref(indf,ig) + forfrac(lay) * &
(forref(indf+1,ig) - forref(indf,ig)))
taug(lay,ngs1+ig) = corradj * (colh2o(lay) * &
(fac00(lay) * absa(ind0,ig) + &
fac10(lay) * absa(ind0+1,ig) + &
fac01(lay) * absa(ind1,ig) + &
fac11(lay) * absa(ind1+1,ig)) &
+ tauself + taufor)
fracs(lay,ngs1+ig) = fracrefa(ig)
enddo
enddo
! Upper atmosphere loop
do lay = laytrop+1, nlayers
ind0 = ((jp(lay)-13)*5+(jt(lay)-1))*nspb(2) + 1
ind1 = ((jp(lay)-12)*5+(jt1(lay)-1))*nspb(2) + 1
indf = indfor(lay)
do ig = 1, ng2
taufor = forfac(lay) * (forref(indf,ig) + &
forfrac(lay) * (forref(indf+1,ig) - forref(indf,ig)))
taug(lay,ngs1+ig) = colh2o(lay) * &
(fac00(lay) * absb(ind0,ig) + &
fac10(lay) * absb(ind0+1,ig) + &
fac01(lay) * absb(ind1,ig) + &
fac11(lay) * absb(ind1+1,ig)) &
+ taufor
fracs(lay,ngs1+ig) = fracrefb(ig)
enddo
enddo
end subroutine taugb2
!----------------------------------------------------------------------------
subroutine taugb3
!----------------------------------------------------------------------------
!
! band 3: 500-630 cm-1 (low key - h2o,co2; low minor - n2o)
! (high key - h2o,co2; high minor - n2o)
!----------------------------------------------------------------------------
! ------- Modules -------
use parrrtm, only : ng3, ngs2
use rrlw_ref, only : chi_mls
use rrlw_kg03, only : fracrefa, fracrefb, absa, absb,&
ka_mn2o, kb_mn2o, selfref, forref
! ------- Declarations -------
! Local
integer :: lay, ind0, ind1, inds, indf, indm, ig
integer :: js, js1, jmn2o, jpl
real(kind=r8) :: speccomb, specparm, specmult, fs
real(kind=r8) :: speccomb1, specparm1, specmult1, fs1
real(kind=r8) :: speccomb_mn2o, specparm_mn2o, specmult_mn2o, &
fmn2o, fmn2omf, chi_n2o, ratn2o, adjfac, adjcoln2o
real(kind=r8) :: speccomb_planck, specparm_planck, specmult_planck, fpl
real(kind=r8) :: p, p4, fk0, fk1, fk2
real(kind=r8) :: fac000, fac100, fac200, fac010, fac110, fac210
real(kind=r8) :: fac001, fac101, fac201, fac011, fac111, fac211
real(kind=r8) :: tauself, taufor, n2om1, n2om2, absn2o
real(kind=r8) :: refrat_planck_a, refrat_planck_b, refrat_m_a, refrat_m_b
real(kind=r8) :: tau_major, tau_major1
! Minor gas mapping levels:
! lower - n2o, p = 706.272 mbar, t = 278.94 k
! upper - n2o, p = 95.58 mbar, t = 215.7 k
! P = 212.725 mb
refrat_planck_a = chi_mls(1,9)/chi_mls(2,9)
! P = 95.58 mb
refrat_planck_b = chi_mls(1,13)/chi_mls(2,13)
! P = 706.270mb
refrat_m_a = chi_mls(1,3)/chi_mls(2,3)
! P = 95.58 mb
refrat_m_b = chi_mls(1,13)/chi_mls(2,13)
! Compute the optical depth by interpolating in ln(pressure) and
! temperature, and appropriate species. Below laytrop, the water vapor
! self-continuum and foreign continuum is interpolated (in temperature)
! separately.
! Lower atmosphere loop
do lay = 1, laytrop
speccomb = colh2o(lay) + rat_h2oco2(lay)*colco2(lay)
specparm = colh2o(lay)/speccomb
if (specparm .ge. oneminus) specparm = oneminus
specmult = 8._r8*(specparm)
js = 1 + int(specmult)
fs = mod(specmult,1.0_r8)
speccomb1 = colh2o(lay) + rat_h2oco2_1(lay)*colco2(lay)
specparm1 = colh2o(lay)/speccomb1
if (specparm1 .ge. oneminus) specparm1 = oneminus
specmult1 = 8._r8*(specparm1)
js1 = 1 + int(specmult1)
fs1 = mod(specmult1,1.0_r8)
speccomb_mn2o = colh2o(lay) + refrat_m_a*colco2(lay)
specparm_mn2o = colh2o(lay)/speccomb_mn2o
if (specparm_mn2o .ge. oneminus) specparm_mn2o = oneminus
specmult_mn2o = 8._r8*specparm_mn2o
jmn2o = 1 + int(specmult_mn2o)
fmn2o = mod(specmult_mn2o,1.0_r8)
fmn2omf = minorfrac(lay)*fmn2o
! In atmospheres where the amount of N2O is too great to be considered
! a minor species, adjust the column amount of N2O by an empirical factor
! to obtain the proper contribution.
chi_n2o = coln2o(lay)/coldry(lay)
ratn2o = 1.e20_r8*chi_n2o/chi_mls(4,jp(lay)+1)
if (ratn2o .gt. 1.5_r8) then
adjfac = 0.5_r8+(ratn2o-0.5_r8)**0.65_r8
adjcoln2o = adjfac*chi_mls(4,jp(lay)+1)*coldry(lay)*1.e-20_r8
else
adjcoln2o = coln2o(lay)
endif
speccomb_planck = colh2o(lay)+refrat_planck_a*colco2(lay)
specparm_planck = colh2o(lay)/speccomb_planck
if (specparm_planck .ge. oneminus) specparm_planck=oneminus
specmult_planck = 8._r8*specparm_planck
jpl= 1 + int(specmult_planck)
fpl = mod(specmult_planck,1.0_r8)
ind0 = ((jp(lay)-1)*5+(jt(lay)-1))*nspa(3) + js
ind1 = (jp(lay)*5+(jt1(lay)-1))*nspa(3) + js1
inds = indself(lay)
indf = indfor(lay)
indm = indminor(lay)
if (specparm .lt. 0.125_r8) then
p = fs - 1
p4 = p**4
fk0 = p4
fk1 = 1 - p - 2.0_r8*p4
fk2 = p + p4
fac000 = fk0*fac00(lay)
fac100 = fk1*fac00(lay)
fac200 = fk2*fac00(lay)
fac010 = fk0*fac10(lay)
fac110 = fk1*fac10(lay)
fac210 = fk2*fac10(lay)
else if (specparm .gt. 0.875_r8) then
p = -fs
p4 = p**4
fk0 = p4
fk1 = 1 - p - 2.0_r8*p4
fk2 = p + p4
fac000 = fk0*fac00(lay)
fac100 = fk1*fac00(lay)
fac200 = fk2*fac00(lay)
fac010 = fk0*fac10(lay)
fac110 = fk1*fac10(lay)
fac210 = fk2*fac10(lay)
else
fac000 = (1._r8 - fs) * fac00(lay)
fac010 = (1._r8 - fs) * fac10(lay)
fac100 = fs * fac00(lay)
fac110 = fs * fac10(lay)
endif
if (specparm1 .lt. 0.125_r8) then
p = fs1 - 1
p4 = p**4
fk0 = p4
fk1 = 1 - p - 2.0_r8*p4
fk2 = p + p4
fac001 = fk0*fac01(lay)
fac101 = fk1*fac01(lay)
fac201 = fk2*fac01(lay)
fac011 = fk0*fac11(lay)
fac111 = fk1*fac11(lay)
fac211 = fk2*fac11(lay)
else if (specparm1 .gt. 0.875_r8) then
p = -fs1
p4 = p**4
fk0 = p4
fk1 = 1 - p - 2.0_r8*p4
fk2 = p + p4
fac001 = fk0*fac01(lay)
fac101 = fk1*fac01(lay)
fac201 = fk2*fac01(lay)
fac011 = fk0*fac11(lay)
fac111 = fk1*fac11(lay)
fac211 = fk2*fac11(lay)
else
fac001 = (1._r8 - fs1) * fac01(lay)
fac011 = (1._r8 - fs1) * fac11(lay)
fac101 = fs1 * fac01(lay)
fac111 = fs1 * fac11(lay)
endif
do ig = 1, ng3
tauself = selffac(lay)* (selfref(inds,ig) + selffrac(lay) * &
(selfref(inds+1,ig) - selfref(inds,ig)))
taufor = forfac(lay) * (forref(indf,ig) + forfrac(lay) * &
(forref(indf+1,ig) - forref(indf,ig)))
n2om1 = ka_mn2o(jmn2o,indm,ig) + fmn2o * &
(ka_mn2o(jmn2o+1,indm,ig) - ka_mn2o(jmn2o,indm,ig))
n2om2 = ka_mn2o(jmn2o,indm+1,ig) + fmn2o * &
(ka_mn2o(jmn2o+1,indm+1,ig) - ka_mn2o(jmn2o,indm+1,ig))
absn2o = n2om1 + minorfrac(lay) * (n2om2 - n2om1)
if (specparm .lt. 0.125_r8) then
tau_major = speccomb * &
(fac000 * absa(ind0,ig) + &
fac100 * absa(ind0+1,ig) + &
fac200 * absa(ind0+2,ig) + &
fac010 * absa(ind0+9,ig) + &
fac110 * absa(ind0+10,ig) + &
fac210 * absa(ind0+11,ig))
else if (specparm .gt. 0.875_r8) then
tau_major = speccomb * &
(fac200 * absa(ind0-1,ig) + &
fac100 * absa(ind0,ig) + &
fac000 * absa(ind0+1,ig) + &
fac210 * absa(ind0+8,ig) + &
fac110 * absa(ind0+9,ig) + &
fac010 * absa(ind0+10,ig))
else
tau_major = speccomb * &
(fac000 * absa(ind0,ig) + &
fac100 * absa(ind0+1,ig) + &
fac010 * absa(ind0+9,ig) + &
fac110 * absa(ind0+10,ig))
endif
if (specparm1 .lt. 0.125_r8) then
tau_major1 = speccomb1 * &
(fac001 * absa(ind1,ig) + &
fac101 * absa(ind1+1,ig) + &
fac201 * absa(ind1+2,ig) + &
fac011 * absa(ind1+9,ig) + &
fac111 * absa(ind1+10,ig) + &
fac211 * absa(ind1+11,ig))
else if (specparm1 .gt. 0.875_r8) then
tau_major1 = speccomb1 * &
(fac201 * absa(ind1-1,ig) + &
fac101 * absa(ind1,ig) + &
fac001 * absa(ind1+1,ig) + &
fac211 * absa(ind1+8,ig) + &
fac111 * absa(ind1+9,ig) + &
fac011 * absa(ind1+10,ig))
else
tau_major1 = speccomb1 * &
(fac001 * absa(ind1,ig) + &
fac101 * absa(ind1+1,ig) + &
fac011 * absa(ind1+9,ig) + &
fac111 * absa(ind1+10,ig))
endif
taug(lay,ngs2+ig) = tau_major + tau_major1 &
+ tauself + taufor &
+ adjcoln2o*absn2o
fracs(lay,ngs2+ig) = fracrefa(ig,jpl) + fpl * &
(fracrefa(ig,jpl+1)-fracrefa(ig,jpl))
enddo
enddo
! Upper atmosphere loop
do lay = laytrop+1, nlayers
speccomb = colh2o(lay) + rat_h2oco2(lay)*colco2(lay)
specparm = colh2o(lay)/speccomb
if (specparm .ge. oneminus) specparm = oneminus
specmult = 4._r8*(specparm)
js = 1 + int(specmult)
fs = mod(specmult,1.0_r8)
speccomb1 = colh2o(lay) + rat_h2oco2_1(lay)*colco2(lay)
specparm1 = colh2o(lay)/speccomb1
if (specparm1 .ge. oneminus) specparm1 = oneminus
specmult1 = 4._r8*(specparm1)
js1 = 1 + int(specmult1)
fs1 = mod(specmult1,1.0_r8)
fac000 = (1._r8 - fs) * fac00(lay)
fac010 = (1._r8 - fs) * fac10(lay)
fac100 = fs * fac00(lay)
fac110 = fs * fac10(lay)
fac001 = (1._r8 - fs1) * fac01(lay)
fac011 = (1._r8 - fs1) * fac11(lay)
fac101 = fs1 * fac01(lay)
fac111 = fs1 * fac11(lay)
speccomb_mn2o = colh2o(lay) + refrat_m_b*colco2(lay)
specparm_mn2o = colh2o(lay)/speccomb_mn2o
if (specparm_mn2o .ge. oneminus) specparm_mn2o = oneminus
specmult_mn2o = 4._r8*specparm_mn2o
jmn2o = 1 + int(specmult_mn2o)
fmn2o = mod(specmult_mn2o,1.0_r8)
fmn2omf = minorfrac(lay)*fmn2o
! In atmospheres where the amount of N2O is too great to be considered
! a minor species, adjust the column amount of N2O by an empirical factor
! to obtain the proper contribution.
chi_n2o = coln2o(lay)/coldry(lay)
ratn2o = 1.e20*chi_n2o/chi_mls(4,jp(lay)+1)
if (ratn2o .gt. 1.5_r8) then
adjfac = 0.5_r8+(ratn2o-0.5_r8)**0.65_r8
adjcoln2o = adjfac*chi_mls(4,jp(lay)+1)*coldry(lay)*1.e-20_r8
else
adjcoln2o = coln2o(lay)
endif
speccomb_planck = colh2o(lay)+refrat_planck_b*colco2(lay)
specparm_planck = colh2o(lay)/speccomb_planck
if (specparm_planck .ge. oneminus) specparm_planck=oneminus
specmult_planck = 4._r8*specparm_planck
jpl= 1 + int(specmult_planck)
fpl = mod(specmult_planck,1.0_r8)
ind0 = ((jp(lay)-13)*5+(jt(lay)-1))*nspb(3) + js
ind1 = ((jp(lay)-12)*5+(jt1(lay)-1))*nspb(3) + js1
indf = indfor(lay)
indm = indminor(lay)
do ig = 1, ng3
taufor = forfac(lay) * (forref(indf,ig) + &
forfrac(lay) * (forref(indf+1,ig) - forref(indf,ig)))
n2om1 = kb_mn2o(jmn2o,indm,ig) + fmn2o * &
(kb_mn2o(jmn2o+1,indm,ig)-kb_mn2o(jmn2o,indm,ig))
n2om2 = kb_mn2o(jmn2o,indm+1,ig) + fmn2o * &
(kb_mn2o(jmn2o+1,indm+1,ig)-kb_mn2o(jmn2o,indm+1,ig))
absn2o = n2om1 + minorfrac(lay) * (n2om2 - n2om1)
taug(lay,ngs2+ig) = speccomb * &
(fac000 * absb(ind0,ig) + &
fac100 * absb(ind0+1,ig) + &
fac010 * absb(ind0+5,ig) + &
fac110 * absb(ind0+6,ig)) &
+ speccomb1 * &
(fac001 * absb(ind1,ig) + &
fac101 * absb(ind1+1,ig) + &
fac011 * absb(ind1+5,ig) + &
fac111 * absb(ind1+6,ig)) &
+ taufor &
+ adjcoln2o*absn2o
fracs(lay,ngs2+ig) = fracrefb(ig,jpl) + fpl * &
(fracrefb(ig,jpl+1)-fracrefb(ig,jpl))
enddo
enddo
end subroutine taugb3
!----------------------------------------------------------------------------
subroutine taugb4
!----------------------------------------------------------------------------
!
! band 4: 630-700 cm-1 (low key - h2o,co2; high key - o3,co2)
!----------------------------------------------------------------------------
! ------- Modules -------
use parrrtm, only : ng4, ngs3
use rrlw_ref, only : chi_mls
use rrlw_kg04, only : fracrefa, fracrefb, absa, absb, &
selfref, forref
! ------- Declarations -------
! Local
integer :: lay, ind0, ind1, inds, indf, ig
integer :: js, js1, jpl
real(kind=r8) :: speccomb, specparm, specmult, fs
real(kind=r8) :: speccomb1, specparm1, specmult1, fs1
real(kind=r8) :: speccomb_planck, specparm_planck, specmult_planck, fpl
real(kind=r8) :: p, p4, fk0, fk1, fk2
real(kind=r8) :: fac000, fac100, fac200, fac010, fac110, fac210
real(kind=r8) :: fac001, fac101, fac201, fac011, fac111, fac211
real(kind=r8) :: tauself, taufor
real(kind=r8) :: refrat_planck_a, refrat_planck_b
real(kind=r8) :: tau_major, tau_major1
! P = 142.5940 mb
refrat_planck_a = chi_mls(1,11)/chi_mls(2,11)
! P = 95.58350 mb
refrat_planck_b = chi_mls(3,13)/chi_mls(2,13)
! Compute the optical depth by interpolating in ln(pressure) and
! temperature, and appropriate species. Below laytrop, the water
! vapor self-continuum and foreign continuum is interpolated (in temperature)
! separately.
! Lower atmosphere loop
do lay = 1, laytrop
speccomb = colh2o(lay) + rat_h2oco2(lay)*colco2(lay)
specparm = colh2o(lay)/speccomb
if (specparm .ge. oneminus) specparm = oneminus
specmult = 8._r8*(specparm)
js = 1 + int(specmult)
fs = mod(specmult,1.0_r8)
speccomb1 = colh2o(lay) + rat_h2oco2_1(lay)*colco2(lay)
specparm1 = colh2o(lay)/speccomb1
if (specparm1 .ge. oneminus) specparm1 = oneminus
specmult1 = 8._r8*(specparm1)
js1 = 1 + int(specmult1)
fs1 = mod(specmult1,1.0_r8)
speccomb_planck = colh2o(lay)+refrat_planck_a*colco2(lay)
specparm_planck = colh2o(lay)/speccomb_planck
if (specparm_planck .ge. oneminus) specparm_planck=oneminus
specmult_planck = 8._r8*specparm_planck
jpl= 1 + int(specmult_planck)
fpl = mod(specmult_planck,1.0_r8)
ind0 = ((jp(lay)-1)*5+(jt(lay)-1))*nspa(4) + js
ind1 = (jp(lay)*5+(jt1(lay)-1))*nspa(4) + js1
inds = indself(lay)
indf = indfor(lay)
if (specparm .lt. 0.125_r8) then
p = fs - 1
p4 = p**4
fk0 = p4
fk1 = 1 - p - 2.0_r8*p4
fk2 = p + p4
fac000 = fk0*fac00(lay)
fac100 = fk1*fac00(lay)
fac200 = fk2*fac00(lay)
fac010 = fk0*fac10(lay)
fac110 = fk1*fac10(lay)
fac210 = fk2*fac10(lay)
else if (specparm .gt. 0.875_r8) then
p = -fs
p4 = p**4
fk0 = p4
fk1 = 1 - p - 2.0_r8*p4
fk2 = p + p4
fac000 = fk0*fac00(lay)
fac100 = fk1*fac00(lay)
fac200 = fk2*fac00(lay)
fac010 = fk0*fac10(lay)
fac110 = fk1*fac10(lay)
fac210 = fk2*fac10(lay)
else
fac000 = (1._r8 - fs) * fac00(lay)
fac010 = (1._r8 - fs) * fac10(lay)
fac100 = fs * fac00(lay)
fac110 = fs * fac10(lay)
endif
if (specparm1 .lt. 0.125_r8) then
p = fs1 - 1
p4 = p**4
fk0 = p4
fk1 = 1 - p - 2.0_r8*p4
fk2 = p + p4
fac001 = fk0*fac01(lay)
fac101 = fk1*fac01(lay)
fac201 = fk2*fac01(lay)
fac011 = fk0*fac11(lay)
fac111 = fk1*fac11(lay)
fac211 = fk2*fac11(lay)
else if (specparm1 .gt. 0.875_r8) then
p = -fs1
p4 = p**4
fk0 = p4
fk1 = 1 - p - 2.0_r8*p4
fk2 = p + p4
fac001 = fk0*fac01(lay)
fac101 = fk1*fac01(lay)
fac201 = fk2*fac01(lay)
fac011 = fk0*fac11(lay)
fac111 = fk1*fac11(lay)
fac211 = fk2*fac11(lay)
else
fac001 = (1._r8 - fs1) * fac01(lay)
fac011 = (1._r8 - fs1) * fac11(lay)
fac101 = fs1 * fac01(lay)
fac111 = fs1 * fac11(lay)
endif
do ig = 1, ng4
tauself = selffac(lay)* (selfref(inds,ig) + selffrac(lay) * &
(selfref(inds+1,ig) - selfref(inds,ig)))
taufor = forfac(lay) * (forref(indf,ig) + forfrac(lay) * &
(forref(indf+1,ig) - forref(indf,ig)))
if (specparm .lt. 0.125_r8) then
tau_major = speccomb * &
(fac000 * absa(ind0,ig) + &
fac100 * absa(ind0+1,ig) + &
fac200 * absa(ind0+2,ig) + &
fac010 * absa(ind0+9,ig) + &
fac110 * absa(ind0+10,ig) + &
fac210 * absa(ind0+11,ig))
else if (specparm .gt. 0.875_r8) then
tau_major = speccomb * &
(fac200 * absa(ind0-1,ig) + &
fac100 * absa(ind0,ig) + &
fac000 * absa(ind0+1,ig) + &
fac210 * absa(ind0+8,ig) + &
fac110 * absa(ind0+9,ig) + &
fac010 * absa(ind0+10,ig))
else
tau_major = speccomb * &
(fac000 * absa(ind0,ig) + &
fac100 * absa(ind0+1,ig) + &
fac010 * absa(ind0+9,ig) + &
fac110 * absa(ind0+10,ig))
endif
if (specparm1 .lt. 0.125_r8) then
tau_major1 = speccomb1 * &
(fac001 * absa(ind1,ig) + &
fac101 * absa(ind1+1,ig) + &
fac201 * absa(ind1+2,ig) + &
fac011 * absa(ind1+9,ig) + &
fac111 * absa(ind1+10,ig) + &
fac211 * absa(ind1+11,ig))
else if (specparm1 .gt. 0.875_r8) then
tau_major1 = speccomb1 * &
(fac201 * absa(ind1-1,ig) + &
fac101 * absa(ind1,ig) + &
fac001 * absa(ind1+1,ig) + &
fac211 * absa(ind1+8,ig) + &
fac111 * absa(ind1+9,ig) + &
fac011 * absa(ind1+10,ig))
else
tau_major1 = speccomb1 * &
(fac001 * absa(ind1,ig) + &
fac101 * absa(ind1+1,ig) + &
fac011 * absa(ind1+9,ig) + &
fac111 * absa(ind1+10,ig))
endif
taug(lay,ngs3+ig) = tau_major + tau_major1 &
+ tauself + taufor
fracs(lay,ngs3+ig) = fracrefa(ig,jpl) + fpl * &
(fracrefa(ig,jpl+1)-fracrefa(ig,jpl))
enddo
enddo
! Upper atmosphere loop
do lay = laytrop+1, nlayers
speccomb = colo3(lay) + rat_o3co2(lay)*colco2(lay)
specparm = colo3(lay)/speccomb
if (specparm .ge. oneminus) specparm = oneminus
specmult = 4._r8*(specparm)
js = 1 + int(specmult)
fs = mod(specmult,1.0_r8)
speccomb1 = colo3(lay) + rat_o3co2_1(lay)*colco2(lay)
specparm1 = colo3(lay)/speccomb1
if (specparm1 .ge. oneminus) specparm1 = oneminus
specmult1 = 4._r8*(specparm1)
js1 = 1 + int(specmult1)
fs1 = mod(specmult1,1.0_r8)
fac000 = (1._r8 - fs) * fac00(lay)
fac010 = (1._r8 - fs) * fac10(lay)
fac100 = fs * fac00(lay)
fac110 = fs * fac10(lay)
fac001 = (1._r8 - fs1) * fac01(lay)
fac011 = (1._r8 - fs1) * fac11(lay)
fac101 = fs1 * fac01(lay)
fac111 = fs1 * fac11(lay)
speccomb_planck = colo3(lay)+refrat_planck_b*colco2(lay)
specparm_planck = colo3(lay)/speccomb_planck
if (specparm_planck .ge. oneminus) specparm_planck=oneminus
specmult_planck = 4._r8*specparm_planck
jpl= 1 + int(specmult_planck)
fpl = mod(specmult_planck,1.0_r8)
ind0 = ((jp(lay)-13)*5+(jt(lay)-1))*nspb(4) + js
ind1 = ((jp(lay)-12)*5+(jt1(lay)-1))*nspb(4) + js1
do ig = 1, ng4
taug(lay,ngs3+ig) = speccomb * &
(fac000 * absb(ind0,ig) + &
fac100 * absb(ind0+1,ig) + &
fac010 * absb(ind0+5,ig) + &
fac110 * absb(ind0+6,ig)) &
+ speccomb1 * &
(fac001 * absb(ind1,ig) + &
fac101 * absb(ind1+1,ig) + &