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optcv.F90 @ 3709

Last change on this file since 3709 was 3700, checked in by emoisan, 8 months ago

Titan:

Add safeguards not to enter microphisics when there are no clouds
Removed a comment

EMo

Property svn:executable set to *

File size: 23.2 KB

Line
1	SUBROUTINE OPTCV(PQMO,NLAY,ZLEV,PLEV,TMID,PMID, &
2	DTAUV,TAUV,TAUCUMV,WBARV,COSBV,TAURAY,TAUGSURF,SEASHAZEFACT,&
3	DIAG_OPTH,DIAG_OPTT,CDCOLUMN)
4
5	use radinc_h
6	use radcommon_h, only: gasv,gasv_recomb,tlimit,Cmk,gzlat_ig, &
7	tgasref,pfgasref,wnov,scalep,indv
8	use gases_h
9	use datafile_mod, only: haze_opt_file
10	use comcstfi_mod, only: pi,r
11	use callkeys_mod, only: continuum,graybody,callgasvis,corrk_recombin, &
12	callclouds,callmufi,seashaze,uncoupl_optic_haze,&
13	opt4clouds,FHVIS,FCVIS
14	use tracer_h, only: nmicro,nice,ices_indx
15
16	implicit none
17
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	!
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
34	! --> New optics added for Titan's clouds
35	!
36	!==================================================================
37	!
38	! THIS SUBROUTINE SETS THE OPTICAL CONSTANTS IN THE VISUAL
39	! IT CALCULATES FOR EACH LAYER, FOR EACH SPECTRAL INTERVAL IN THE VISUAL
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	!-------------------------------------------------------------------
51
52
53	!==========================================================
54	! Input/Output
55	!==========================================================
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)
58	REAL*8, INTENT(IN) :: ZLEV(NLAY+1)
59	REAL*8, INTENT(IN) :: PLEV(L_LEVELS)
60	REAL*8, INTENT(IN) :: TMID(L_LEVELS), PMID(L_LEVELS)
61	REAL*8, INTENT(IN) :: TAURAY(L_NSPECTV)
62	REAL*8, INTENT(IN) :: SEASHAZEFACT(L_LEVELS)
63	INTEGER, INTENT(IN) :: CDCOLUMN
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)
70	REAL*8, INTENT(OUT) :: TAUGSURF(L_NSPECTV,L_NGAUSS-1)
71	REAL*8, INTENT(OUT) :: DIAG_OPTH(L_LEVELS,L_NSPECTV,6)
72	REAL*8, INTENT(OUT) :: DIAG_OPTT(L_LEVELS,L_NSPECTV,6)
73	! ==========================================================
74
75	real*8 DTAUKV(L_LEVELS,L_NSPECTV,L_NGAUSS)
76
77	! Titan customisation
78	! J. Vatant d'Ollone (2016)
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)
83	! ==========================
84
85	integer L, NW, NG, K, LK, IAER
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)
91
92	real*8 DCONT
93	real*8 DRAYAER
94	double precision wn_cont, p_cont, p_air, T_cont, dtemp, dtempc
95	double precision p_cross
96
97	real*8 KCOEF(4)
98
99	! temporary variable to reduce memory access time to gasv
100	real*8 tmpk(2,2)
101
102	! temporary variables for multiple aerosol calculation
103	real*8 atemp(L_NLAYRAD,L_NSPECTV)
104	real*8 btemp(L_NLAYRAD,L_NSPECTV)
105	real*8 ctemp(L_NLAYRAD,L_NSPECTV)
106
107	! variables for k in units m^-1
108	real*8 dz(L_LEVELS)
109
110	integer igas, jgas, ilay
111
112	integer interm
113
114	! Variables for haze optics
115	character(len=200) file_path
116	logical file_ok
117	integer dumch
118	real*8 dumwvl
119	integer ilev_cutoff ! pressure level index of cutoff
120	real*8 corr_haze
121	real*8 corr_alb
122
123	! Variables for new optics
124	integer iq, iw, FTYPE, CTYPE
125	real*8 m0as,m0af,m0ccn,m3as,m3af,m3ccn,m3cld
126	real*8 dtauaer_s,dtauaer_f,dtau_ccn,dtau_cld
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)
129	real*8,save :: ssa_ccn(L_NSPECTV),asf_ccn(L_NSPECTV)
130	real*8,save :: ssa_cld(L_NSPECTV),asf_cld(L_NSPECTV)
131	!$OMP THREADPRIVATE(rhoaer_s,rhoaer_f,ssa_s,ssa_f,ssa_cld,asf_s,asf_f,asf_cld)
132
133	logical,save :: firstcall=.true.
134	!$OMP THREADPRIVATE(firstcall)
135
136
137	!! AS: to save time in computing continuum (see bilinearbig)
138	IF (.not.ALLOCATED(indv)) THEN
139	ALLOCATE(indv(L_NSPECTV,ngasmx,ngasmx))
140	indv = -9999 ! this initial value means "to be calculated"
141	ENDIF
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
145	DHAZE_T(:,:) = 0.0
146	SSA_T(:,:) = 0.0
147	ASF_T(:,:) = 0.0
148
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
162
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.
168
169	taugsurf(:,:) = 0.0
170	dpr(:) = 0.0
171	lkcoef(:,:) = 0.0
172
173	! Level of cutoff
174	!~~~~~~~~~~~~~~~~
175	ilev_cutoff = 26
176
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)
180
181	! if we have continuum opacities, we need dz
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
184
185	call tpindex(PMID(K),TMID(K),pfgasref,tgasref,LCOEF,MT(K),MP(K))
186
187	do LK=1,4
188	LKCOEF(K,LK) = LCOEF(LK)
189	end do
190	end do ! L_LEVELS
191
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
199
200	DIAG_OPTH(:,:,:) = 0.D0
201	DIAG_OPTT(:,:,:) = 0.D0
202
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
211
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
218	! Cut-off (here for p = 2.7e3Pa / alt = 70km)
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))
222	ENDIF
223
224	dtauaer_s = m3as*rhoaer_s(nw)
225	dtauaer_f = m3af*rhoaer_f(nw)
226
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
236
237	! Spherical aerosols :
238	!---------------------
239	CTYPE = 5
240	m0as = pqmo(ilay,1) / 2.0
241	m3as = pqmo(ilay,2) / 2.0
242	! If not callclouds : must have a cut-off (here for p = 2.7e3Pa / alt = 70km)
243	IF (.NOT. callclouds) THEN
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))
247	ENDIF
248	ENDIF
249	call get_haze_and_cloud_opacity(FTYPE,CTYPE,m0as,m3as,iw,dtauaer_s,ssa_s(nw),asf_s(nw))
250
251	! Fractal aerosols :
252	!-------------------
253	CTYPE = FTYPE
254	m0af = pqmo(ilay,3) / 2.0
255	m3af = pqmo(ilay,4) / 2.0
256	! If not callclouds : must have a cut-off (here for p = 2.7e3Pa / alt = 70km)
257	IF (.NOT. callclouds) THEN
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))
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
265
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
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
283
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
295	! Diagnostics for the haze :
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
299
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
307	m3cld = pqmo(ilay,6) / 2.0
308
309	! Clear / Dark column method :
310	!-----------------------------
311
312	! CCN's SSA :
313	call get_haze_and_cloud_opacity(FTYPE,FTYPE,m0ccn,m3ccn,iw,dtau_ccn,ssa_ccn(nw),asf_ccn(nw))
314
315	! Clear column (CCN, C2H2, C2H6, HCN, AC6H6) :
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, AC6H6) :
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
337
338	! For small dropplets, opacity of nucleus dominates
339	IF ((m3ccn + m3cld) .le. tiny(m3ccn)) THEN !no cloud !emoisan tests
340	dtau_cld = 0.
341	ssa_cld(nw) = 0.
342	ELSE
343	dtau_cld = (dtau_cldm3ccn + dtau_cldm3cld) / (m3ccn + m3cld)
344	ssa_cld(nw) = (ssa_ccn(nw)m3ccn + ssa_cld(nw)m3cld) / (m3ccn + m3cld)
345	ENDIF
346
347	! Tuning of optical properties for clouds :
348	dtau_cld = dtau_cld * (FCVIS * (1-ssa_cld(nw)) + ssa_cld(nw))
349	ssa_cld(nw) = ssa_cld(nw) / (FCVIS * (1-ssa_cld(nw)) + ssa_cld(nw))
350
351	! Total of Haze + Clouds opacity (dtau), SSA (w) and ASF (COS) :
352	DHAZE_T(k,nw) = dtauaer_s + dtauaer_f + dtau_cld
353	IF (DHAZE_T(k,nw) .GT. 1.D-30) THEN
354	SSA_T(k,nw) = ( dtauaer_sssa_s(nw) + dtauaer_fssa_f(nw) + dtau_cld*ssa_cld(nw) ) / ( dtauaer_s+dtauaer_f+dtau_cld )
355	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) ) &
356	/ ( ssa_s(nw)dtauaer_s + ssa_f(nw)dtauaer_f + ssa_cld(nw)*dtau_cld )
357	ELSE
358	DHAZE_T(k,nw) = 0.D0
359	SSA_T(k,nw) = 1.0
360	ASF_T(k,nw) = 1.0
361	ENDIF
362
363	! Diagnostics for clouds :
364	DIAG_OPTT(k,nw,1) = DHAZE_T(k,nw) ! dtau
365	DIAG_OPTT(k,nw,2) = SSA_T(k,nw) ! wbar
366	DIAG_OPTT(k,nw,3) = ASF_T(k,nw) ! gbar
367
368	ELSE
369	! Diagnostics for clouds :
370	DIAG_OPTT(k,nw,1) = 0.D0 ! dtau
371	DIAG_OPTT(k,nw,2) = 1.0 ! wbar
372	DIAG_OPTT(k,nw,3) = 1.0 ! gbar
373	ENDIF
374
375	! Optics and microphysics no coupled :
376	ELSE
377	! Call fixed vertical haze profile of extinction - same for all columns
378	call disr_haze(dz(k),plev(k),wnov(nw),DHAZE_T(k,nw),SSA_T(k,nw),ASF_T(k,nw))
379	if (seashaze) DHAZE_T(k,nw) = DHAZE_T(k,nw)*seashazefact(k)
380	! Diagnostics for the haze :
381	DIAG_OPTH(k,nw,1) = DHAZE_T(k,nw) ! dtau
382	DIAG_OPTH(k,nw,2) = SSA_T(k,nw) ! wbar
383	DIAG_OPTH(k,nw,3) = ASF_T(k,nw) ! gbar
384	! Diagnostics for clouds :
385	DIAG_OPTT(k,nw,1) = 0.D0 ! dtau
386	DIAG_OPTT(k,nw,2) = 1.0 ! wbar
387	DIAG_OPTT(k,nw,3) = 1.0 ! gbar
388	ENDIF ! ENDIF callmufi
389
390	!JL18 It seems to be good to have aerosols in the first "radiative layer" of the gcm in the IR
391	! but visible does not handle very well diffusion in first layer.
392	! The tauaero and tauray are thus set to 0 (a small value for rayleigh because the code crashes otherwise)
393	! in the 4 first semilayers in optcv, but not optci.
394	! This solves random variations of the sw heating at the model top.
395	if (k<5) DHAZE_T(K,:) = 0.0
396
397	DRAYAER = TRAY(K,NW)
398	! DRAYAER is Tau RAYleigh scattering, plus AERosol opacity
399	DRAYAER = DRAYAER + DHAZE_T(K,NW) ! Titan's aerosol
400
401	DCONT = 0.0 ! continuum absorption
402
403	if(continuum.and.(.not.graybody).and.callgasvis)then
404	! include continua if necessary
405	wn_cont = dble(wnov(nw))
406	T_cont = dble(TMID(k))
407	do igas=1,ngasmx
408
409	p_cont = dble(PMID(k)scalepgfrac(igas,ilay))
410
411	dtemp=0.0
412	if(igas.eq.igas_N2)then
413
414	interm = indv(nw,igas,igas)
415	! call interpolateN2N2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
416	indv(nw,igas,igas) = interm
417	! only goes to 500 cm^-1, so unless we're around a cold brown dwarf, this is irrelevant in the visible
418
419	elseif(igas.eq.igas_H2)then
420
421	! first do self-induced absorption
422	interm = indv(nw,igas,igas)
423	call interpolateH2H2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
424	indv(nw,igas,igas) = interm
425
426	! then cross-interactions with other gases
427	do jgas=1,ngasmx
428	p_cross = dble(PMID(k)scalepgfrac(jgas,ilay))
429	dtempc = 0.0
430	if(jgas.eq.igas_N2)then
431	interm = indv(nw,igas,jgas)
432	call interpolateN2H2(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
433	indv(nw,igas,jgas) = interm
434	! should be irrelevant in the visible
435	endif
436	dtemp = dtemp + dtempc
437	enddo
438
439	elseif(igas.eq.igas_CH4)then
440
441	! first do self-induced absorption
442	interm = indv(nw,igas,igas)
443	call interpolateCH4CH4(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
444	indv(nw,igas,igas) = interm
445
446	! then cross-interactions with other gases
447	do jgas=1,ngasmx
448	p_cross = dble(PMID(k)scalepgfrac(jgas,ilay))
449	dtempc = 0.0
450	if(jgas.eq.igas_N2)then
451	interm = indv(nw,igas,jgas)
452	call interpolateN2CH4(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
453	indv(nw,igas,jgas) = interm
454	endif
455	dtemp = dtemp + dtempc
456	enddo
457
458	endif
459
460	DCONT = DCONT + dtemp
461
462	enddo
463
464	DCONT = DCONT*dz(k)
465
466	endif
467
468	do ng=1,L_NGAUSS-1
469
470	! Now compute TAUGAS
471
472	! JVO 2017 : added tmpk because the repeated calls to gasi/v increased dramatically
473	! the execution time of optci/v -> ~ factor 2 on the whole radiative
474	! transfer on the tested simulations !
475
476	if (corrk_recombin) then
477	tmpk = GASV_RECOMB(MT(K):MT(K)+1,MP(K):MP(K)+1,NW,NG)
478	else
479	tmpk = GASV(MT(K):MT(K)+1,MP(K):MP(K)+1,1,NW,NG)
480	endif
481
482	KCOEF(1) = tmpk(1,1) ! KCOEF(1) = GASV(MT(K),MP(K),1,NW,NG)
483	KCOEF(2) = tmpk(1,2) ! KCOEF(2) = GASV(MT(K),MP(K)+1,1,NW,NG)
484	KCOEF(3) = tmpk(2,2) ! KCOEF(3) = GASV(MT(K)+1,MP(K)+1,1,NW,NG)
485	KCOEF(4) = tmpk(2,1) ! KCOEF(4) = GASV(MT(K)+1,MP(K),1,NW,NG)
486
487	! Interpolate the gaseous k-coefficients to the requested T,P values
488
489	ANS = LKCOEF(K,1)KCOEF(1) + LKCOEF(K,2)KCOEF(2) + &
490	LKCOEF(K,3)KCOEF(3) + LKCOEF(K,4)KCOEF(4)
491
492
493	TAUGAS = U(k)*ANS
494
495	TAUGSURF(NW,NG) = TAUGSURF(NW,NG) + TAUGAS + DCONT
496	DTAUKV(K,nw,ng) = TAUGAS &
497	+ DRAYAER & ! DRAYAER includes all scattering contributions
498	+ DCONT ! For parameterized continuum aborption
499	end do
500
501	! Now fill in the "clear" part of the spectrum (NG = L_NGAUSS),
502	! which holds continuum opacity only
503
504	NG = L_NGAUSS
505	DTAUKV(K,nw,ng) = DRAYAER + DCONT ! Scattering + parameterized continuum absorption, including Titan's haze
506
507	DIAG_OPTH(K,nw,4) = DRAYAER
508	DIAG_OPTH(K,nw,5) = TAUGAS
509	DIAG_OPTH(K,nw,6) = DCONT
510	DIAG_OPTT(K,nw,4) = DRAYAER
511	DIAG_OPTT(K,nw,5) = TAUGAS
512	DIAG_OPTT(K,nw,6) = DCONT
513
514	end do ! K = L_LEVELS
515	end do ! nw = L_NSPECTV
516
517	!=======================================================================
518	! Now the full treatment for the layers, where besides the opacity
519	! we need to calculate the scattering albedo and asymmetry factors
520	! ======================================================================
521
522	! Haze scattering
523	!JL18 It seems to be good to have aerosols in the first "radiative layer" of the gcm in the IR
524	! but not in the visible
525	! The dhaze_s is thus set to 0 in the 4 first semilayers in optcv, but not optci.
526	! This solves random variations of the sw heating at the model top.
527	DO NW=1,L_NSPECTV
528	DHAZES_T(1:4,NW) = 0.d0
529	DO K=5,L_LEVELS
530	DHAZES_T(K,NW) = DHAZE_T(K,NW) * SSA_T(K,NW) ! effect of scattering albedo on haze
531	ENDDO
532	ENDDO
533
534	! NW spectral loop
535	DO NW=1,L_NSPECTV
536	! L vertical loop
537	DO L=1,L_NLAYRAD-1
538	K = 2*L+1
539	atemp(L,NW) = ASF_T(K,NW)DHAZES_T(K,NW) + ASF_T(K+1,NW)DHAZES_T(K+1,NW)
540	btemp(L,NW) = DHAZES_T(K,NW) + DHAZES_T(K+1,NW)
541	ctemp(L,NW) = btemp(L,NW) + 0.9999*(TRAY(K,NW) + TRAY(K+1,NW)) ! JVO 2017 : does this 0.999 is really meaningful ?
542	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW) + TRAY(K+1,NW)
543	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
544	END DO
545
546	! Last level
547	L = L_NLAYRAD
548	K = 2*L+1
549	atemp(L,NW) = ASF_T(K,NW)*DHAZES_T(K,NW)
550	btemp(L,NW) = DHAZES_T(K,NW)
551	ctemp(L,NW) = btemp(L,NW) + 0.9999*TRAY(K,NW) ! JVO 2017 : does this 0.999 is really meaningful ?
552	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW)
553	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
554	END DO
555
556	! NG Gauss loop
557	DO NG=1,L_NGAUSS
558	! NW spectral loop
559	DO NW=1,L_NSPECTV
560	! L vertical loop
561	DO L=1,L_NLAYRAD-1
562	K = 2*L+1
563	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG) + DTAUKV(K+1,NW,NG)
564	WBARV(L,nw,ng) = ctemp(L,NW) / DTAUV(L,nw,ng)
565	END DO
566
567	! Last level
568	L = L_NLAYRAD
569	K = 2*L+1
570	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG)
571	WBARV(L,NW,NG) = ctemp(L,NW) / DTAUV(L,NW,NG)
572	END DO
573	END DO
574
575	! Total extinction optical depths
576	!DO NG=1,L_NGAUSS ! full gauss loop
577	! DO NW=1,L_NSPECTV
578	! TAUCUMV(1,NW,NG)=0.0D0
579	! DO K=2,L_LEVELS
580	! TAUCUMV(K,NW,NG)=TAUCUMV(K-1,NW,NG)+DTAUKV(K,NW,NG)
581	! END DO
582	! DO L=1,L_NLAYRAD
583	! TAUV(L,NW,NG)=TAUCUMV(2*L,NW,NG)
584	! END DO
585	! TAUV(L,NW,NG)=TAUCUMV(2*L_NLAYRAD+1,NW,NG)
586	! END DO
587	!END DO ! end full gauss loop
588
589	TAUCUMV(:,:,:) = DTAUKV(:,:,:)
590	DO L=1,L_NLAYRAD
591	TAUV(L,:,:)=TAUCUMV(2*L,:,:)
592	END DO
593	TAUV(L,:,:)=TAUCUMV(2*L_NLAYRAD+1,:,:)
594
595	if(firstcall) firstcall = .false.
596
597	return
598
599
600	end subroutine optcv

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