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optcv.F90 @ 3340

Last change on this file since 3340 was 3340, checked in by slebonnois, 6 months ago
SL: Lucie's modifications to run without clouds and still get good tropospheric T profile
Property svn:executable set to ``*
File size: 23.0 KB

Rev	Line
[3083]	1	SUBROUTINE OPTCV(PQMO,NLAY,ZLEV,PLEV,TMID,PMID, &
	2	DTAUV,TAUV,TAUCUMV,WBARV,COSBV,TAURAY,TAUGSURF,SEASHAZEFACT,&
[3318]	3	DIAG_OPTH,DIAG_OPTT,CDCOLUMN)
[253]	4
[716]	5	use radinc_h
[2050]	6	use radcommon_h, only: gasv,gasv_recomb,tlimit,Cmk,gzlat_ig, &
[2133]	7	tgasref,pfgasref,wnov,scalep,indv
[716]	8	use gases_h
[2242]	9	use datafile_mod, only: haze_opt_file
[3083]	10	use comcstfi_mod, only: pi,r
	11	use callkeys_mod, only: continuum,graybody,callgasvis,corrk_recombin, &
	12	callclouds,callmufi,seashaze,uncoupl_optic_haze,&
[3318]	13	opt4clouds,FHVIS,FCVIS
[3083]	14	use tracer_h, only: nmicro,nice,ices_indx
[253]	15
[716]	16	implicit none
[253]	17
[716]	18	!==================================================================
	19	!
	20	! Purpose
	21	! -------
	22	! Calculates shortwave optical constants at each level.
	23	!
	24	! Authors
	25	! -------
	26	! Adapted from the NASA Ames code by R. Wordsworth (2009)
	27	!
[3090]	28	! Modified
	29	! --------
	30	! J. Vatant d'Ollone (2016-17)
	31	! --> Clean and adaptation to Titan
	32	! B. de Batz de Trenquelléon (2022-2023)
	33	! --> Clean and correction to Titan
	34	! --> New optics added for Titan's clouds
	35	!
[716]	36	!==================================================================
	37	!
	38	! THIS SUBROUTINE SETS THE OPTICAL CONSTANTS IN THE VISUAL
[1722]	39	! IT CALCULATES FOR EACH LAYER, FOR EACH SPECTRAL INTERVAL IN THE VISUAL
[716]	40	! LAYER: WBAR, DTAU, COSBAR
	41	! LEVEL: TAU
	42	!
	43	! TAUV(L,NW,NG) is the cumulative optical depth at the top of radiation code
	44	! layer L. NW is spectral wavelength interval, ng the Gauss point index.
	45	!
	46	! TLEV(L) - Temperature at the layer boundary
	47	! PLEV(L) - Pressure at the layer boundary (i.e. level)
	48	! GASV(NT,NPS,NW,NG) - Visible k-coefficients
	49	!
	50	!-------------------------------------------------------------------
[253]	51
	52
[1822]	53	!==========================================================
	54	! Input/Output
	55	!==========================================================
[2050]	56	REAL*8, INTENT(IN) :: PQMO(nlay,nmicro) ! Tracers for microphysics optics (X/m2).
	57	INTEGER, INTENT(IN) :: NLAY ! Number of pressure layers (for pqmo)
[3083]	58	REAL*8, INTENT(IN) :: ZLEV(NLAY+1)
[1822]	59	REAL*8, INTENT(IN) :: PLEV(L_LEVELS)
	60	REAL*8, INTENT(IN) :: TMID(L_LEVELS), PMID(L_LEVELS)
[1826]	61	REAL*8, INTENT(IN) :: TAURAY(L_NSPECTV)
[2046]	62	REAL*8, INTENT(IN) :: SEASHAZEFACT(L_LEVELS)
[3083]	63	INTEGER, INTENT(IN) :: CDCOLUMN
[1822]	64
	65	REAL*8, INTENT(OUT) :: DTAUV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
	66	REAL*8, INTENT(OUT) :: TAUV(L_NLEVRAD,L_NSPECTV,L_NGAUSS)
	67	REAL*8, INTENT(OUT) :: TAUCUMV(L_LEVELS,L_NSPECTV,L_NGAUSS)
	68	REAL*8, INTENT(OUT) :: COSBV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
	69	REAL*8, INTENT(OUT) :: WBARV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
[1823]	70	REAL*8, INTENT(OUT) :: TAUGSURF(L_NSPECTV,L_NGAUSS-1)
[3318]	71	REAL*8, INTENT(OUT) :: DIAG_OPTH(L_LEVELS,L_NSPECTV,6)
	72	REAL*8, INTENT(OUT) :: DIAG_OPTT(L_LEVELS,L_NSPECTV,6)
[1822]	73	! ==========================================================
	74
[1722]	75	real*8 DTAUKV(L_LEVELS,L_NSPECTV,L_NGAUSS)
[253]	76
[1648]	77	! Titan customisation
	78	! J. Vatant d'Ollone (2016)
[3083]	79	real*8 DHAZE_T(L_LEVELS,L_NSPECTV)
	80	real*8 DHAZES_T(L_LEVELS,L_NSPECTV)
	81	real*8 SSA_T(L_LEVELS,L_NSPECTV)
	82	real*8 ASF_T(L_LEVELS,L_NSPECTV)
[1648]	83	! ==========================
	84
[873]	85	integer L, NW, NG, K, LK, IAER
[716]	86	integer MT(L_LEVELS), MP(L_LEVELS), NP(L_LEVELS)
	87	real*8 ANS, TAUGAS
	88	real*8 TRAY(L_LEVELS,L_NSPECTV)
	89	real*8 DPR(L_LEVELS), U(L_LEVELS)
	90	real*8 LCOEF(4), LKCOEF(L_LEVELS,4)
[253]	91
[1788]	92	real*8 DCONT
[1722]	93	real*8 DRAYAER
[873]	94	double precision wn_cont, p_cont, p_air, T_cont, dtemp, dtempc
	95	double precision p_cross
[253]	96
[873]	97	real*8 KCOEF(4)
[1725]	98
	99	! temporary variable to reduce memory access time to gasv
	100	real*8 tmpk(2,2)
[253]	101
[716]	102	! temporary variables for multiple aerosol calculation
[918]	103	real*8 atemp(L_NLAYRAD,L_NSPECTV)
	104	real*8 btemp(L_NLAYRAD,L_NSPECTV)
	105	real*8 ctemp(L_NLAYRAD,L_NSPECTV)
[253]	106
[716]	107	! variables for k in units m^-1
[873]	108	real*8 dz(L_LEVELS)
[253]	109
[1648]	110	integer igas, jgas, ilay
[253]	111
[873]	112	integer interm
	113
[2242]	114	! Variables for haze optics
	115	character(len=200) file_path
	116	logical file_ok
	117	integer dumch
	118	real*8 dumwvl
[3340]	119	integer ilev_cutoff ! pressure level index of cutoff
	120	real*8 corr_haze
	121	real*8 corr_alb
[2242]	122
[3083]	123	! Variables for new optics
	124	integer iq, iw, FTYPE, CTYPE
[3090]	125	real*8 m0as,m0af,m0ccn,m3as,m3af,m3ccn,m3cld
[3083]	126	real*8 dtauaer_s,dtauaer_f,dtau_ccn,dtau_cld
[2242]	127	real*8,save :: rhoaer_s(L_NSPECTV),ssa_s(L_NSPECTV),asf_s(L_NSPECTV)
	128	real*8,save :: rhoaer_f(L_NSPECTV),ssa_f(L_NSPECTV),asf_f(L_NSPECTV)
[3318]	129	real*8,save :: ssa_ccn(L_NSPECTV),asf_ccn(L_NSPECTV)
[3083]	130	real*8,save :: ssa_cld(L_NSPECTV),asf_cld(L_NSPECTV)
	131	!$OMP THREADPRIVATE(rhoaer_s,rhoaer_f,ssa_s,ssa_f,ssa_cld,asf_s,asf_f,asf_cld)
[2242]	132
[1897]	133	logical,save :: firstcall=.true.
[2242]	134	!$OMP THREADPRIVATE(firstcall)
[1897]	135
	136
[873]	137	!! AS: to save time in computing continuum (see bilinearbig)
	138	IF (.not.ALLOCATED(indv)) THEN
[878]	139	ALLOCATE(indv(L_NSPECTV,ngasmx,ngasmx))
[873]	140	indv = -9999 ! this initial value means "to be calculated"
	141	ENDIF
[1792]	142
	143	! Some initialisation beacause there's a pb with disr_haze at the limits (nw=1)
	144	! I should check this - For now we set vars to zero : better than nans - JVO 2017
[2242]	145	DHAZE_T(:,:) = 0.0
	146	SSA_T(:,:) = 0.0
	147	ASF_T(:,:) = 0.0
[1792]	148
[2242]	149	! Load tabulated haze optical properties if needed.
	150	! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	151	IF (firstcall .AND. callmufi .AND. (.NOT. uncoupl_optic_haze)) THEN
	152	OPEN(12,file=TRIM(haze_opt_file),form='formatted') ! The file has been inquired in physiq_mod firstcall
	153	READ(12,*) ! dummy header
	154	DO NW=1,L_NSPECTI
	155	READ(12,*) ! there's IR 1st
	156	ENDDO
	157	DO NW=1,L_NSPECTV
	158	READ(12,*) dumch, dumwvl, rhoaer_f(nw), ssa_f(nw), asf_f(nw), rhoaer_s(nw), ssa_s(nw), asf_s(nw)
	159	ENDDO
	160	CLOSE(12)
	161	ENDIF
[873]	162
[3083]	163	!=======================================================================
	164	! Determine the total gas opacity throughout the column, for each
	165	! spectral interval, NW, and each Gauss point, NG.
	166	! Calculate the continuum opacities, i.e., those that do not depend on
	167	! NG, the Gauss index.
[253]	168
[3083]	169	taugsurf(:,:) = 0.0
	170	dpr(:) = 0.0
	171	lkcoef(:,:) = 0.0
[253]	172
[3340]	173	! Level of cutoff
	174	!~~~~~~~~~~~~~~~~
	175	ilev_cutoff = 26
	176
[3083]	177	do K=2,L_LEVELS
	178	ilay = L_NLAYRAD+1 - k/2 ! int. arithmetic => gives the gcm layer index (reversed)
	179	DPR(k) = PLEV(K)-PLEV(K-1)
[253]	180
[3083]	181	! if we have continuum opacities, we need dz
[1947]	182	dz(k) = dpr(k)RTMID(K)/(gzlat_ig(ilay)*PMID(K))
	183	U(k) = Cmk(ilay)*DPR(k) ! only Cmk line in optcv.F
[1647]	184
[3083]	185	call tpindex(PMID(K),TMID(K),pfgasref,tgasref,LCOEF,MT(K),MP(K))
[253]	186
[3083]	187	do LK=1,4
	188	LKCOEF(K,LK) = LCOEF(LK)
	189	end do
	190	end do ! L_LEVELS
[253]	191
[3083]	192	! Rayleigh scattering
	193	do NW=1,L_NSPECTV
	194	TRAY(1:4,NW) = 1.d-30
	195	do K=5,L_LEVELS
	196	TRAY(K,NW) = TAURAY(NW) * DPR(K)
	197	end do ! L_LEVELS
	198	end do
[1722]	199
[3318]	200	DIAG_OPTH(:,:,:) = 0.D0
	201	DIAG_OPTT(:,:,:) = 0.D0
	202
[3083]	203	do NW=1,L_NSPECTV
	204	! We ignore K=1...
	205	do K=2,L_LEVELS
	206	! int. arithmetic => gives the gcm layer index (reversed)
	207	ilay = L_NLAYRAD+1 - k/2
	208
	209	! Optics coupled with the microphysics :
	210	IF (callmufi .AND. (.NOT. uncoupl_optic_haze)) THEN
[873]	211
[3083]	212	!==========================================================================================
	213	! Old optics (must have callclouds = .false.):
	214	!==========================================================================================
	215	IF (.NOT. opt4clouds) THEN
	216	m3as = pqmo(ilay,2) / 2.0
	217	m3af = pqmo(ilay,4) / 2.0
[3090]	218	! Cut-off (here for p = 2.7e3Pa / alt = 70km)
[3340]	219	IF (ilay .lt. ilev_cutoff) THEN
	220	m3as = pqmo(ilev_cutoff,2) / 2.0 * (zlev(ilay+1)-zlev(ilay)) / (zlev(ilev_cutoff+1)-zlev(ilev_cutoff))
	221	m3af = pqmo(ilev_cutoff,4) / 2.0 * (zlev(ilay+1)-zlev(ilay)) / (zlev(ilev_cutoff+1)-zlev(ilev_cutoff))
[3083]	222	ENDIF
	223
	224	dtauaer_s = m3as*rhoaer_s(nw)
	225	dtauaer_f = m3af*rhoaer_f(nw)
[253]	226
[3083]	227	!==========================================================================================
	228	! New optics :
	229	!==========================================================================================
	230	ELSE
	231	iw = (L_NSPECTV + 1) - NW ! Visible first and return
	232	!-----------------------------
	233	! HAZE (Spherical + Fractal) :
	234	!-----------------------------
	235	FTYPE = 1
[2242]	236
[3083]	237	! Spherical aerosols :
	238	!---------------------
	239	CTYPE = 5
	240	m0as = pqmo(ilay,1) / 2.0
	241	m3as = pqmo(ilay,2) / 2.0
[3090]	242	! If not callclouds : must have a cut-off (here for p = 2.7e3Pa / alt = 70km)
[3083]	243	IF (.NOT. callclouds) THEN
[3340]	244	IF (ilay .lt. ilev_cutoff) THEN
	245	m0as = pqmo(ilev_cutoff,1) / 2.0 * (zlev(ilay+1)-zlev(ilay)) / (zlev(ilev_cutoff+1)-zlev(ilev_cutoff))
	246	m3as = pqmo(ilev_cutoff,2) / 2.0 * (zlev(ilay+1)-zlev(ilay)) / (zlev(ilev_cutoff+1)-zlev(ilev_cutoff))
[3083]	247	ENDIF
	248	ENDIF
	249	call get_haze_and_cloud_opacity(FTYPE,CTYPE,m0as,m3as,iw,dtauaer_s,ssa_s(nw),asf_s(nw))
[1722]	250
[3083]	251	! Fractal aerosols :
	252	!-------------------
	253	CTYPE = FTYPE
	254	m0af = pqmo(ilay,3) / 2.0
	255	m3af = pqmo(ilay,4) / 2.0
[3090]	256	! If not callclouds : must have a cut-off (here for p = 2.7e3Pa / alt = 70km)
[3083]	257	IF (.NOT. callclouds) THEN
[3340]	258	IF (ilay .lt. ilev_cutoff) THEN
	259	m0af = pqmo(ilev_cutoff,3) / 2.0 * (zlev(ilay+1)-zlev(ilay)) / (zlev(ilev_cutoff+1)-zlev(ilev_cutoff))
	260	m3af = pqmo(ilev_cutoff,4) / 2.0 * (zlev(ilay+1)-zlev(ilay)) / (zlev(ilev_cutoff+1)-zlev(ilev_cutoff))
[3083]	261	ENDIF
	262	ENDIF
	263	call get_haze_and_cloud_opacity(FTYPE,CTYPE,m0af,m3af,iw,dtauaer_f,ssa_f(nw),asf_f(nw))
	264	ENDIF
[253]	265
[3318]	266	! Tuning of optical properties for haze :
	267	!dtauaer_s = dtauaer_s * (FHVIS * (1-ssa_s(nw)) + ssa_s(nw))
	268	!ssa_s(nw) = ssa_s(nw) / (FHVIS * (1-ssa_s(nw)) + ssa_s(nw))
	269	dtauaer_f = dtauaer_f * (FHVIS * (1-ssa_f(nw)) + ssa_f(nw))
	270	ssa_f(nw) = ssa_f(nw) / (FHVIS * (1-ssa_f(nw)) + ssa_f(nw))
	271
[3083]	272	! Total of Haze opacity (dtau), SSA (w) and ASF (COS) :
	273	DHAZE_T(k,nw) = dtauaer_s + dtauaer_f
	274	IF (dtauaer_s + dtauaer_f .GT. 1.D-30) THEN
	275	SSA_T(k,nw) = ( dtauaer_sssa_s(nw) + dtauaer_fssa_f(nw) ) / ( dtauaer_s+dtauaer_f )
	276	ASF_T(k,nw) = ( dtauaer_sssa_s(nw)asf_s(nw) + dtauaer_fssa_f(nw)asf_f(nw) ) &
	277	/ ( ssa_s(nw)dtauaer_s + ssa_f(nw)dtauaer_f )
	278	ELSE
	279	DHAZE_T(k,nw) = 0.D0
	280	SSA_T(k,nw) = 1.0
	281	ASF_T(k,nw) = 1.0
	282	ENDIF
[3318]	283
[3340]	284	! Opacity and albedo adjustement below cutoff
	285	!----------------------------------------------
	286	corr_haze=0.85-0.15TANH((PMID(k)100.-2500.)/250.)
	287	corr_alb =0.85-0.15TANH((PMID(k)100.-4500.)/1000.)
	288	IF (.NOT. callclouds) THEN
	289	IF (ilay .lt. ilev_cutoff) THEN
	290	DHAZE_T(k,nw) = DHAZE_T(k,nw) * corr_haze
	291	SSA_T(k,nw) = SSA_T(k,nw) * corr_alb
	292	ENDIF
	293	ENDIF
	294
[3083]	295	! Diagnostics for the haze :
[3318]	296	DIAG_OPTH(k,nw,1) = DHAZE_T(k,nw) ! dtau
	297	DIAG_OPTH(k,nw,2) = SSA_T(k,nw) ! wbar
	298	DIAG_OPTH(k,nw,3) = ASF_T(k,nw) ! gbar
[305]	299
[3083]	300	!---------------------
	301	! CLOUDS (Spherical) :
	302	!---------------------
	303	IF (callclouds) THEN
	304	CTYPE = 0
	305	m0ccn = pqmo(ilay,5) / 2.0
	306	m3ccn = pqmo(ilay,6) / 2.0
[3318]	307	m3cld = pqmo(ilay,6) / 2.0
[3083]	308
	309	! Clear / Dark column method :
	310	!-----------------------------
[305]	311
[3083]	312	! CCN's SSA :
	313	call get_haze_and_cloud_opacity(FTYPE,FTYPE,m0ccn,m3ccn,iw,dtau_ccn,ssa_ccn(nw),asf_ccn(nw))
[253]	314
[3083]	315	! Clear column (CCN, C2H2, C2H6, HCN) :
	316	IF (CDCOLUMN == 0) THEN
	317	DO iq = 2, nice
	318	m3cld = m3cld + (pqmo(ilay,ices_indx(iq)) / 2.0)
	319	ENDDO
	320	call get_haze_and_cloud_opacity(FTYPE,CTYPE,m0ccn,m3cld,iw,dtau_cld,ssa_cld(nw),asf_cld(nw))
	321
	322	! Dark column (CCN, CH4, C2H2, C2H6, HCN) :
	323	ELSEIF (CDCOLUMN == 1) THEN
	324	DO iq = 1, nice
	325	m3cld = m3cld + (pqmo(ilay,ices_indx(iq)) / 2.0)
	326	ENDDO
	327	call get_haze_and_cloud_opacity(FTYPE,CTYPE,m0ccn,m3cld,iw,dtau_cld,ssa_cld(nw),asf_cld(nw))
	328
	329	ELSE
	330	WRITE(,) 'WARNING OPTCV.F90 : CDCOLUMN MUST BE 0 OR 1'
	331	WRITE(,) 'WE USE DARK COLUMN ...'
	332	DO iq = 1, nice
	333	m3cld = m3cld + (pqmo(ilay,ices_indx(iq)) / 2.0)
	334	ENDDO
	335	call get_haze_and_cloud_opacity(FTYPE,CTYPE,m0ccn,m3cld,iw,dtau_cld,ssa_cld(nw),asf_cld(nw))
	336	ENDIF
[253]	337
[3083]	338	! For small dropplets, opacity of nucleus dominates
[3318]	339	dtau_cld = (dtau_cldm3ccn + dtau_cldm3cld) / (m3ccn + m3cld)
[3083]	340	ssa_cld(nw) = (ssa_ccn(nw)m3ccn + ssa_cld(nw)m3cld) / (m3ccn + m3cld)
[253]	341
[3318]	342	! Tuning of optical properties for clouds :
	343	dtau_cld = dtau_cld * (FCVIS * (1-ssa_cld(nw)) + ssa_cld(nw))
	344	ssa_cld(nw) = ssa_cld(nw) / (FCVIS * (1-ssa_cld(nw)) + ssa_cld(nw))
	345
[3083]	346	! Total of Haze + Clouds opacity (dtau), SSA (w) and ASF (COS) :
	347	DHAZE_T(k,nw) = dtauaer_s + dtauaer_f + dtau_cld
	348	IF (DHAZE_T(k,nw) .GT. 1.D-30) THEN
	349	SSA_T(k,nw) = ( dtauaer_sssa_s(nw) + dtauaer_fssa_f(nw) + dtau_cld*ssa_cld(nw) ) / ( dtauaer_s+dtauaer_f+dtau_cld )
	350	ASF_T(k,nw) = ( dtauaer_sssa_s(nw)asf_s(nw) + dtauaer_fssa_f(nw)asf_f(nw) + dtau_cldssa_cld(nw)asf_cld(nw) ) &
	351	/ ( ssa_s(nw)dtauaer_s + ssa_f(nw)dtauaer_f + ssa_cld(nw)*dtau_cld )
	352	ELSE
	353	DHAZE_T(k,nw) = 0.D0
	354	SSA_T(k,nw) = 1.0
	355	ASF_T(k,nw) = 1.0
	356	ENDIF
	357
	358	! Diagnostics for clouds :
[3318]	359	DIAG_OPTT(k,nw,1) = DHAZE_T(k,nw) ! dtau
	360	DIAG_OPTT(k,nw,2) = SSA_T(k,nw) ! wbar
	361	DIAG_OPTT(k,nw,3) = ASF_T(k,nw) ! gbar
[3083]	362
	363	ELSE
	364	! Diagnostics for clouds :
[3318]	365	DIAG_OPTT(k,nw,1) = 0.D0 ! dtau
	366	DIAG_OPTT(k,nw,2) = 1.0 ! wbar
	367	DIAG_OPTT(k,nw,3) = 1.0 ! gbar
[3083]	368	ENDIF
	369
	370	! Optics and microphysics no coupled :
	371	ELSE
	372	! Call fixed vertical haze profile of extinction - same for all columns
	373	call disr_haze(dz(k),plev(k),wnov(nw),DHAZE_T(k,nw),SSA_T(k,nw),ASF_T(k,nw))
	374	if (seashaze) DHAZE_T(k,nw) = DHAZE_T(k,nw)*seashazefact(k)
	375	! Diagnostics for the haze :
[3318]	376	DIAG_OPTH(k,nw,1) = DHAZE_T(k,nw) ! dtau
	377	DIAG_OPTH(k,nw,2) = SSA_T(k,nw) ! wbar
	378	DIAG_OPTH(k,nw,3) = ASF_T(k,nw) ! gbar
[3083]	379	! Diagnostics for clouds :
[3318]	380	DIAG_OPTT(k,nw,1) = 0.D0 ! dtau
	381	DIAG_OPTT(k,nw,2) = 1.0 ! wbar
	382	DIAG_OPTT(k,nw,3) = 1.0 ! gbar
[3083]	383	ENDIF ! ENDIF callmufi
	384
	385	!JL18 It seems to be good to have aerosols in the first "radiative layer" of the gcm in the IR
	386	! but visible does not handle very well diffusion in first layer.
	387	! The tauaero and tauray are thus set to 0 (a small value for rayleigh because the code crashes otherwise)
	388	! in the 4 first semilayers in optcv, but not optci.
	389	! This solves random variations of the sw heating at the model top.
	390	if (k<5) DHAZE_T(K,:) = 0.0
	391
	392	DRAYAER = TRAY(K,NW)
	393	! DRAYAER is Tau RAYleigh scattering, plus AERosol opacity
	394	DRAYAER = DRAYAER + DHAZE_T(K,NW) ! Titan's aerosol
[253]	395
[3083]	396	DCONT = 0.0 ! continuum absorption
[1648]	397
[3083]	398	if(continuum.and.(.not.graybody).and.callgasvis)then
	399	! include continua if necessary
	400	wn_cont = dble(wnov(nw))
	401	T_cont = dble(TMID(k))
	402	do igas=1,ngasmx
[1648]	403
[3083]	404	p_cont = dble(PMID(k)scalepgfrac(igas,ilay))
[1648]	405
[3083]	406	dtemp=0.0
	407	if(igas.eq.igas_N2)then
[253]	408
[3083]	409	interm = indv(nw,igas,igas)
	410	! call interpolateN2N2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
	411	indv(nw,igas,igas) = interm
	412	! only goes to 500 cm^-1, so unless we're around a cold brown dwarf, this is irrelevant in the visible
[253]	413
[3083]	414	elseif(igas.eq.igas_H2)then
[253]	415
[3083]	416	! first do self-induced absorption
	417	interm = indv(nw,igas,igas)
	418	call interpolateH2H2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
	419	indv(nw,igas,igas) = interm
[873]	420
[3083]	421	! then cross-interactions with other gases
	422	do jgas=1,ngasmx
	423	p_cross = dble(PMID(k)scalepgfrac(jgas,ilay))
	424	dtempc = 0.0
	425	if(jgas.eq.igas_N2)then
	426	interm = indv(nw,igas,jgas)
	427	call interpolateN2H2(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
	428	indv(nw,igas,jgas) = interm
	429	! should be irrelevant in the visible
	430	endif
	431	dtemp = dtemp + dtempc
	432	enddo
[253]	433
[3083]	434	elseif(igas.eq.igas_CH4)then
[305]	435
[3083]	436	! first do self-induced absorption
	437	interm = indv(nw,igas,igas)
	438	call interpolateCH4CH4(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
	439	indv(nw,igas,igas) = interm
[253]	440
[3083]	441	! then cross-interactions with other gases
	442	do jgas=1,ngasmx
	443	p_cross = dble(PMID(k)scalepgfrac(jgas,ilay))
	444	dtempc = 0.0
	445	if(jgas.eq.igas_N2)then
	446	interm = indv(nw,igas,jgas)
	447	call interpolateN2CH4(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
	448	indv(nw,igas,jgas) = interm
	449	endif
	450	dtemp = dtemp + dtempc
	451	enddo
[873]	452
[3083]	453	endif
[1725]	454
[3083]	455	DCONT = DCONT + dtemp
[253]	456
[3083]	457	enddo
[253]	458
[3083]	459	DCONT = DCONT*dz(k)
[1722]	460
[3083]	461	endif
[253]	462
[3083]	463	do ng=1,L_NGAUSS-1
[253]	464
[3083]	465	! Now compute TAUGAS
[253]	466
[3083]	467	! JVO 2017 : added tmpk because the repeated calls to gasi/v increased dramatically
	468	! the execution time of optci/v -> ~ factor 2 on the whole radiative
	469	! transfer on the tested simulations !
[253]	470
[3083]	471	if (corrk_recombin) then
	472	tmpk = GASV_RECOMB(MT(K):MT(K)+1,MP(K):MP(K)+1,NW,NG)
	473	else
	474	tmpk = GASV(MT(K):MT(K)+1,MP(K):MP(K)+1,1,NW,NG)
	475	endif
	476
	477	KCOEF(1) = tmpk(1,1) ! KCOEF(1) = GASV(MT(K),MP(K),1,NW,NG)
	478	KCOEF(2) = tmpk(1,2) ! KCOEF(2) = GASV(MT(K),MP(K)+1,1,NW,NG)
	479	KCOEF(3) = tmpk(2,2) ! KCOEF(3) = GASV(MT(K)+1,MP(K)+1,1,NW,NG)
	480	KCOEF(4) = tmpk(2,1) ! KCOEF(4) = GASV(MT(K)+1,MP(K),1,NW,NG)
[253]	481
[3083]	482	! Interpolate the gaseous k-coefficients to the requested T,P values
[253]	483
[3083]	484	ANS = LKCOEF(K,1)KCOEF(1) + LKCOEF(K,2)KCOEF(2) + &
	485	LKCOEF(K,3)KCOEF(3) + LKCOEF(K,4)KCOEF(4)
[253]	486
[3083]	487
	488	TAUGAS = U(k)*ANS
	489
	490	TAUGSURF(NW,NG) = TAUGSURF(NW,NG) + TAUGAS + DCONT
	491	DTAUKV(K,nw,ng) = TAUGAS &
	492	+ DRAYAER & ! DRAYAER includes all scattering contributions
	493	+ DCONT ! For parameterized continuum aborption
	494	end do
	495
	496	! Now fill in the "clear" part of the spectrum (NG = L_NGAUSS),
	497	! which holds continuum opacity only
	498
	499	NG = L_NGAUSS
	500	DTAUKV(K,nw,ng) = DRAYAER + DCONT ! Scattering + parameterized continuum absorption, including Titan's haze
	501
[3318]	502	DIAG_OPTH(K,nw,4) = DRAYAER
	503	DIAG_OPTH(K,nw,5) = TAUGAS
	504	DIAG_OPTH(K,nw,6) = DCONT
	505	DIAG_OPTT(K,nw,4) = DRAYAER
	506	DIAG_OPTT(K,nw,5) = TAUGAS
	507	DIAG_OPTT(K,nw,6) = DCONT
[3083]	508
[3318]	509	end do ! K = L_LEVELS
	510	end do ! nw = L_NSPECTV
	511
[716]	512	!=======================================================================
	513	! Now the full treatment for the layers, where besides the opacity
	514	! we need to calculate the scattering albedo and asymmetry factors
[2050]	515	! ======================================================================
[1722]	516
[1648]	517	! Haze scattering
[2095]	518	!JL18 It seems to be good to have aerosols in the first "radiative layer" of the gcm in the IR
[2242]	519	! but not in the visible
	520	! The dhaze_s is thus set to 0 in the 4 first semilayers in optcv, but not optci.
	521	! This solves random variations of the sw heating at the model top.
[1648]	522	DO NW=1,L_NSPECTV
[2242]	523	DHAZES_T(1:4,NW) = 0.d0
[2095]	524	DO K=5,L_LEVELS
[1722]	525	DHAZES_T(K,NW) = DHAZE_T(K,NW) * SSA_T(K,NW) ! effect of scattering albedo on haze
[1648]	526	ENDDO
	527	ENDDO
[253]	528
[3083]	529	! NW spectral loop
[716]	530	DO NW=1,L_NSPECTV
[3083]	531	! L vertical loop
	532	DO L=1,L_NLAYRAD-1
	533	K = 2*L+1
	534	atemp(L,NW) = ASF_T(K,NW)DHAZES_T(K,NW) + ASF_T(K+1,NW)DHAZES_T(K+1,NW)
	535	btemp(L,NW) = DHAZES_T(K,NW) + DHAZES_T(K+1,NW)
	536	ctemp(L,NW) = btemp(L,NW) + 0.9999*(TRAY(K,NW) + TRAY(K+1,NW)) ! JVO 2017 : does this 0.999 is really meaningful ?
	537	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW) + TRAY(K+1,NW)
	538	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
	539	END DO
[919]	540
[3083]	541	! Last level
	542	L = L_NLAYRAD
	543	K = 2*L+1
	544	atemp(L,NW) = ASF_T(K,NW)*DHAZES_T(K,NW)
	545	btemp(L,NW) = DHAZES_T(K,NW)
	546	ctemp(L,NW) = btemp(L,NW) + 0.9999*TRAY(K,NW) ! JVO 2017 : does this 0.999 is really meaningful ?
	547	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW)
	548	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
	549	END DO
[918]	550
[3083]	551	! NG Gauss loop
[918]	552	DO NG=1,L_NGAUSS
[3083]	553	! NW spectral loop
	554	DO NW=1,L_NSPECTV
	555	! L vertical loop
	556	DO L=1,L_NLAYRAD-1
	557	K = 2*L+1
	558	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG) + DTAUKV(K+1,NW,NG)
	559	WBARV(L,nw,ng) = ctemp(L,NW) / DTAUV(L,nw,ng)
	560	END DO
[253]	561
[3083]	562	! Last level
	563	L = L_NLAYRAD
	564	K = 2*L+1
	565	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG)
	566	WBARV(L,NW,NG) = ctemp(L,NW) / DTAUV(L,NW,NG)
	567	END DO
	568	END DO
[253]	569
[716]	570	! Total extinction optical depths
[3083]	571	!DO NG=1,L_NGAUSS ! full gauss loop
	572	! DO NW=1,L_NSPECTV
	573	! TAUCUMV(1,NW,NG)=0.0D0
	574	! DO K=2,L_LEVELS
	575	! TAUCUMV(K,NW,NG)=TAUCUMV(K-1,NW,NG)+DTAUKV(K,NW,NG)
	576	! END DO
	577	! DO L=1,L_NLAYRAD
	578	! TAUV(L,NW,NG)=TAUCUMV(2*L,NW,NG)
	579	! END DO
	580	! TAUV(L,NW,NG)=TAUCUMV(2*L_NLAYRAD+1,NW,NG)
	581	! END DO
	582	!END DO ! end full gauss loop
	583
	584	TAUCUMV(:,:,:) = DTAUKV(:,:,:)
	585	DO L=1,L_NLAYRAD
	586	TAUV(L,:,:)=TAUCUMV(2*L,:,:)
	587	END DO
	588	TAUV(L,:,:)=TAUCUMV(2*L_NLAYRAD+1,:,:)
[716]	589
[1897]	590	if(firstcall) firstcall = .false.
[1648]	591
[873]	592	return
	593
	594
	595	end subroutine optcv

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