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optcv.F90 @ 3026

Last change on this file since 3026 was 2366, checked in by jvatant, 5 years ago

Titan GCM : Major maintenance catching up commits from the generic including :

r2356 and 2354 removing obsolete old dynamical core
various minor addition to physics and gestion of phys_state_var_mode, especially in dyn1d
adding MESOSCALE CPP keys around chemistry and microphysics (disabled in mesoscale for now)

Property svn:executable set to *

File size: 14.6 KB

Line
1	SUBROUTINE OPTCV(PQMO,NLAY,PLEV,TMID,PMID, &
2	DTAUV,TAUV,TAUCUMV,WBARV,COSBV,TAURAY,TAUGSURF,SEASHAZEFACT)
3
4	use radinc_h
5	use radcommon_h, only: gasv,gasv_recomb,tlimit,Cmk,gzlat_ig, &
6	tgasref,pfgasref,wnov,scalep,indv
7	use gases_h
8	use datafile_mod, only: haze_opt_file
9	use comcstfi_mod, only: r
10	use callkeys_mod, only: continuum,graybody,callgasvis,corrk_recombin, &
11	callclouds,callmufi,seashaze,uncoupl_optic_haze
12	use tracer_h, only: nmicro,nice
13
14	implicit none
15
16	!==================================================================
17	!
18	! Purpose
19	! -------
20	! Calculates shortwave optical constants at each level.
21	!
22	! Authors
23	! -------
24	! Adapted from the NASA Ames code by R. Wordsworth (2009)
25	! Clean and adaptation to Titan by J. Vatant d'Ollone (2016-17)
26	!
27	!==================================================================
28	!
29	! THIS SUBROUTINE SETS THE OPTICAL CONSTANTS IN THE VISUAL
30	! IT CALCULATES FOR EACH LAYER, FOR EACH SPECTRAL INTERVAL IN THE VISUAL
31	! LAYER: WBAR, DTAU, COSBAR
32	! LEVEL: TAU
33	!
34	! TAUV(L,NW,NG) is the cumulative optical depth at the top of radiation code
35	! layer L. NW is spectral wavelength interval, ng the Gauss point index.
36	!
37	! TLEV(L) - Temperature at the layer boundary
38	! PLEV(L) - Pressure at the layer boundary (i.e. level)
39	! GASV(NT,NPS,NW,NG) - Visible k-coefficients
40	!
41	!-------------------------------------------------------------------
42
43
44	!==========================================================
45	! Input/Output
46	!==========================================================
47	REAL*8, INTENT(IN) :: PQMO(nlay,nmicro) ! Tracers for microphysics optics (X/m2).
48	INTEGER, INTENT(IN) :: NLAY ! Number of pressure layers (for pqmo)
49	REAL*8, INTENT(IN) :: PLEV(L_LEVELS)
50	REAL*8, INTENT(IN) :: TMID(L_LEVELS), PMID(L_LEVELS)
51	REAL*8, INTENT(IN) :: TAURAY(L_NSPECTV)
52	REAL*8, INTENT(IN) :: SEASHAZEFACT(L_LEVELS)
53
54	REAL*8, INTENT(OUT) :: DTAUV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
55	REAL*8, INTENT(OUT) :: TAUV(L_NLEVRAD,L_NSPECTV,L_NGAUSS)
56	REAL*8, INTENT(OUT) :: TAUCUMV(L_LEVELS,L_NSPECTV,L_NGAUSS)
57	REAL*8, INTENT(OUT) :: COSBV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
58	REAL*8, INTENT(OUT) :: WBARV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
59	REAL*8, INTENT(OUT) :: TAUGSURF(L_NSPECTV,L_NGAUSS-1)
60	! ==========================================================
61
62	real*8 DTAUKV(L_LEVELS,L_NSPECTV,L_NGAUSS)
63
64	! Titan customisation
65	! J. Vatant d'Ollone (2016)
66	real*8 DHAZE_T(L_LEVELS,L_NSPECTI)
67	real*8 DHAZES_T(L_LEVELS,L_NSPECTI)
68	real*8 SSA_T(L_LEVELS,L_NSPECTI)
69	real*8 ASF_T(L_LEVELS,L_NSPECTI)
70	! ==========================
71
72	integer L, NW, NG, K, LK, IAER
73	integer MT(L_LEVELS), MP(L_LEVELS), NP(L_LEVELS)
74	real*8 ANS, TAUGAS
75	real*8 TRAY(L_LEVELS,L_NSPECTV)
76	real*8 DPR(L_LEVELS), U(L_LEVELS)
77	real*8 LCOEF(4), LKCOEF(L_LEVELS,4)
78
79	real*8 DCONT
80	real*8 DRAYAER
81	double precision wn_cont, p_cont, p_air, T_cont, dtemp, dtempc
82	double precision p_cross
83
84	real*8 KCOEF(4)
85
86	! temporary variable to reduce memory access time to gasv
87	real*8 tmpk(2,2)
88
89	! temporary variables for multiple aerosol calculation
90	real*8 atemp(L_NLAYRAD,L_NSPECTV)
91	real*8 btemp(L_NLAYRAD,L_NSPECTV)
92	real*8 ctemp(L_NLAYRAD,L_NSPECTV)
93
94	! variables for k in units m^-1
95	real*8 dz(L_LEVELS)
96
97	integer igas, jgas, ilay
98
99	integer interm
100
101	! Variables for haze optics
102	character(len=200) file_path
103	logical file_ok
104	integer dumch
105	real*8 dumwvl
106
107	real*8 m3as,m3af
108	real*8 dtauaer_s,dtauaer_f
109	real*8,save :: rhoaer_s(L_NSPECTV),ssa_s(L_NSPECTV),asf_s(L_NSPECTV)
110	real*8,save :: rhoaer_f(L_NSPECTV),ssa_f(L_NSPECTV),asf_f(L_NSPECTV)
111	!$OMP THREADPRIVATE(rhoaer_s,rhoaer_f,ssa_s,ssa_f,asf_s,asf_f)
112
113	logical,save :: firstcall=.true.
114	!$OMP THREADPRIVATE(firstcall)
115
116
117	!! AS: to save time in computing continuum (see bilinearbig)
118	IF (.not.ALLOCATED(indv)) THEN
119	ALLOCATE(indv(L_NSPECTV,ngasmx,ngasmx))
120	indv = -9999 ! this initial value means "to be calculated"
121	ENDIF
122
123	! Some initialisation beacause there's a pb with disr_haze at the limits (nw=1)
124	! I should check this - For now we set vars to zero : better than nans - JVO 2017
125	DHAZE_T(:,:) = 0.0
126	SSA_T(:,:) = 0.0
127	ASF_T(:,:) = 0.0
128
129	! Load tabulated haze optical properties if needed.
130	! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
131	IF (firstcall .AND. callmufi .AND. (.NOT. uncoupl_optic_haze)) THEN
132	OPEN(12,file=TRIM(haze_opt_file),form='formatted') ! The file has been inquired in physiq_mod firstcall
133	READ(12,*) ! dummy header
134	DO NW=1,L_NSPECTI
135	READ(12,*) ! there's IR 1st
136	ENDDO
137	DO NW=1,L_NSPECTV
138	READ(12,*) dumch, dumwvl, rhoaer_f(nw), ssa_f(nw), asf_f(nw), rhoaer_s(nw), ssa_s(nw), asf_s(nw)
139	ENDDO
140	CLOSE(12)
141	ENDIF
142
143	!=======================================================================
144	! Determine the total gas opacity throughout the column, for each
145	! spectral interval, NW, and each Gauss point, NG.
146	! Calculate the continuum opacities, i.e., those that do not depend on
147	! NG, the Gauss index.
148
149	taugsurf(:,:) = 0.0
150	dpr(:) = 0.0
151	lkcoef(:,:) = 0.0
152
153	do K=2,L_LEVELS
154
155	ilay = L_NLAYRAD+1 - k/2 ! int. arithmetic => gives the gcm layer index (reversed)
156
157	DPR(k) = PLEV(K)-PLEV(K-1)
158
159	! if we have continuum opacities, we need dz
160
161	dz(k) = dpr(k)RTMID(K)/(gzlat_ig(ilay)*PMID(K))
162	U(k) = Cmk(ilay)*DPR(k) ! only Cmk line in optcv.F
163
164	call tpindex(PMID(K),TMID(K),pfgasref,tgasref,LCOEF,MT(K),MP(K))
165
166	do LK=1,4
167	LKCOEF(K,LK) = LCOEF(LK)
168	end do
169	end do ! levels
170
171	! Rayleigh scattering
172	do NW=1,L_NSPECTV
173	TRAY(1:4,NW) = 1.d-30
174	do K=5,L_LEVELS
175	TRAY(K,NW) = TAURAY(NW) * DPR(K)
176	end do ! levels
177	end do
178
179	! we ignore K=1...
180	do K=2,L_LEVELS
181
182	ilay = L_NLAYRAD+1 - k/2 ! int. arithmetic => gives the gcm layer index (reversed)
183
184	do NW=1,L_NSPECTV
185
186	IF (callmufi .AND. (.NOT. uncoupl_optic_haze)) THEN
187	m3as = pqmo(ilay,2) / 2.0
188	m3af = pqmo(ilay,4) / 2.0
189
190	IF ( ilay .lt. 18 ) THEN
191	m3as = pqmo(18,2) / 2.0 * dz(k) / dz(18)
192	m3af = pqmo(18,4) / 2.0 * dz(k) / dz(18)
193	ENDIF
194
195	dtauaer_s = m3as*rhoaer_s(nw)
196	dtauaer_f = m3af*rhoaer_f(nw)
197	DHAZE_T(k,nw) = dtauaer_s + dtauaer_f
198
199	IF ( dtauaer_s + dtauaer_f .GT. 1.D-30 ) THEN
200	SSA_T(k,nw) = ( dtauaer_sssa_s(nw) + dtauaer_fssa_f(nw) ) / ( dtauaer_s+dtauaer_f )
201	ASF_T(k,nw) = ( dtauaer_sssa_s(nw)asf_s(nw) + dtauaer_fssa_f(nw)asf_f(nw) ) &
202	/ ( ssa_s(nw)dtauaer_s + ssa_f(nw)dtauaer_f )
203	ELSE
204	DHAZE_T(k,nw) = 0.D0
205	SSA_T(k,nw) = 1.0
206	ASF_T(k,nw) = 1.0
207	ENDIF
208
209	IF (callclouds.and.firstcall) &
210	WRITE(,) 'WARNING: In optcv, optical properties &
211	&calculations are not implemented yet'
212	ELSE
213	! Call fixed vertical haze profile of extinction - same for all columns
214	call disr_haze(dz(k),plev(k),wnov(nw),DHAZE_T(k,nw),SSA_T(k,nw),ASF_T(k,nw))
215	if (seashaze) DHAZE_T(k,nw) = DHAZE_T(k,nw)*seashazefact(k)
216	ENDIF
217
218	!JL18 It seems to be good to have aerosols in the first "radiative layer" of the gcm in the IR
219	! but visible does not handle very well diffusion in first layer.
220	! The tauaero and tauray are thus set to 0 (a small value for rayleigh because the code crashes otherwise)
221	! in the 4 first semilayers in optcv, but not optci.
222	! This solves random variations of the sw heating at the model top.
223	if (k<5) DHAZE_T(K,:) = 0.0
224
225	DRAYAER = TRAY(K,NW)
226	! DRAYAER is Tau RAYleigh scattering, plus AERosol opacity
227	DRAYAER = DRAYAER + DHAZE_T(K,NW) ! Titan's aerosol
228
229	DCONT = 0.0 ! continuum absorption
230
231	if(continuum.and.(.not.graybody).and.callgasvis)then
232	! include continua if necessary
233	wn_cont = dble(wnov(nw))
234	T_cont = dble(TMID(k))
235	do igas=1,ngasmx
236
237	p_cont = dble(PMID(k)scalepgfrac(igas,ilay))
238
239	dtemp=0.0
240	if(igas.eq.igas_N2)then
241
242	interm = indv(nw,igas,igas)
243	! call interpolateN2N2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
244	indv(nw,igas,igas) = interm
245	! only goes to 500 cm^-1, so unless we're around a cold brown dwarf, this is irrelevant in the visible
246
247	elseif(igas.eq.igas_H2)then
248
249	! first do self-induced absorption
250	interm = indv(nw,igas,igas)
251	call interpolateH2H2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
252	indv(nw,igas,igas) = interm
253
254	! then cross-interactions with other gases
255	do jgas=1,ngasmx
256	p_cross = dble(PMID(k)scalepgfrac(jgas,ilay))
257	dtempc = 0.0
258	if(jgas.eq.igas_N2)then
259	interm = indv(nw,igas,jgas)
260	call interpolateN2H2(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
261	indv(nw,igas,jgas) = interm
262	! should be irrelevant in the visible
263	endif
264	dtemp = dtemp + dtempc
265	enddo
266
267	elseif(igas.eq.igas_CH4)then
268
269	! first do self-induced absorption
270	interm = indv(nw,igas,igas)
271	call interpolateCH4CH4(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
272	indv(nw,igas,igas) = interm
273
274	! then cross-interactions with other gases
275	do jgas=1,ngasmx
276	p_cross = dble(PMID(k)scalepgfrac(jgas,ilay))
277	dtempc = 0.0
278	if(jgas.eq.igas_N2)then
279	interm = indv(nw,igas,jgas)
280	call interpolateN2CH4(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
281	indv(nw,igas,jgas) = interm
282	endif
283	dtemp = dtemp + dtempc
284	enddo
285
286	endif
287
288	DCONT = DCONT + dtemp
289
290	enddo
291
292	DCONT = DCONT*dz(k)
293
294	endif
295
296	do ng=1,L_NGAUSS-1
297
298	! Now compute TAUGAS
299
300	! JVO 2017 : added tmpk because the repeated calls to gasi/v increased dramatically
301	! the execution time of optci/v -> ~ factor 2 on the whole radiative
302	! transfer on the tested simulations !
303
304	if (corrk_recombin) then
305	tmpk = GASV_RECOMB(MT(K):MT(K)+1,MP(K):MP(K)+1,NW,NG)
306	else
307	tmpk = GASV(MT(K):MT(K)+1,MP(K):MP(K)+1,1,NW,NG)
308	endif
309
310	KCOEF(1) = tmpk(1,1) ! KCOEF(1) = GASV(MT(K),MP(K),1,NW,NG)
311	KCOEF(2) = tmpk(1,2) ! KCOEF(2) = GASV(MT(K),MP(K)+1,1,NW,NG)
312	KCOEF(3) = tmpk(2,2) ! KCOEF(3) = GASV(MT(K)+1,MP(K)+1,1,NW,NG)
313	KCOEF(4) = tmpk(2,1) ! KCOEF(4) = GASV(MT(K)+1,MP(K),1,NW,NG)
314
315	! Interpolate the gaseous k-coefficients to the requested T,P values
316
317	ANS = LKCOEF(K,1)KCOEF(1) + LKCOEF(K,2)KCOEF(2) + &
318	LKCOEF(K,3)KCOEF(3) + LKCOEF(K,4)KCOEF(4)
319
320
321	TAUGAS = U(k)*ANS
322
323	TAUGSURF(NW,NG) = TAUGSURF(NW,NG) + TAUGAS + DCONT
324	DTAUKV(K,nw,ng) = TAUGAS &
325	+ DRAYAER & ! DRAYAER includes all scattering contributions
326	+ DCONT ! For parameterized continuum aborption
327
328	end do
329
330	! Now fill in the "clear" part of the spectrum (NG = L_NGAUSS),
331	! which holds continuum opacity only
332
333	NG = L_NGAUSS
334	DTAUKV(K,nw,ng) = DRAYAER + DCONT ! Scattering + parameterized continuum absorption, including Titan's haze
335
336	end do
337	end do
338
339
340	!=======================================================================
341	! Now the full treatment for the layers, where besides the opacity
342	! we need to calculate the scattering albedo and asymmetry factors
343	! ======================================================================
344
345	! Haze scattering
346	!JL18 It seems to be good to have aerosols in the first "radiative layer" of the gcm in the IR
347	! but not in the visible
348	! The dhaze_s is thus set to 0 in the 4 first semilayers in optcv, but not optci.
349	! This solves random variations of the sw heating at the model top.
350	DO NW=1,L_NSPECTV
351	DHAZES_T(1:4,NW) = 0.d0
352	DO K=5,L_LEVELS
353	DHAZES_T(K,NW) = DHAZE_T(K,NW) * SSA_T(K,NW) ! effect of scattering albedo on haze
354	ENDDO
355	ENDDO
356
357
358	DO NW=1,L_NSPECTV
359	DO L=1,L_NLAYRAD-1
360	K = 2*L+1
361	atemp(L,NW) = ASF_T(K,NW)DHAZES_T(K,NW) + ASF_T(K+1,NW)DHAZES_T(K+1,NW)
362	btemp(L,NW) = DHAZES_T(K,NW) + DHAZES_T(K+1,NW)
363	ctemp(L,NW) = btemp(L,NW) + 0.9999*(TRAY(K,NW) + TRAY(K+1,NW)) ! JVO 2017 : does this 0.999 is really meaningful ?
364	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW) + TRAY(K+1,NW)
365	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
366	END DO ! L vertical loop
367
368	! Last level
369	L = L_NLAYRAD
370	K = 2*L+1
371	atemp(L,NW) = ASF_T(K,NW)*DHAZES_T(K,NW)
372	btemp(L,NW) = DHAZES_T(K,NW)
373	ctemp(L,NW) = btemp(L,NW) + 0.9999*TRAY(K,NW) ! JVO 2017 : does this 0.999 is really meaningful ?
374	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW)
375	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
376
377
378	END DO ! NW spectral loop
379
380	DO NG=1,L_NGAUSS
381	DO NW=1,L_NSPECTV
382	DO L=1,L_NLAYRAD-1
383
384	K = 2*L+1
385	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG) + DTAUKV(K+1,NW,NG)
386	WBARV(L,nw,ng) = ctemp(L,NW) / DTAUV(L,nw,ng)
387
388	END DO ! L vertical loop
389
390	! Last level
391
392	L = L_NLAYRAD
393	K = 2*L+1
394	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG)
395
396	WBARV(L,NW,NG) = ctemp(L,NW) / DTAUV(L,NW,NG)
397
398	END DO ! NW spectral loop
399	END DO ! NG Gauss loop
400
401	! Total extinction optical depths
402
403	DO NG=1,L_NGAUSS ! full gauss loop
404	DO NW=1,L_NSPECTV
405	TAUCUMV(1,NW,NG)=0.0D0
406	DO K=2,L_LEVELS
407	TAUCUMV(K,NW,NG)=TAUCUMV(K-1,NW,NG)+DTAUKV(K,NW,NG)
408	END DO
409
410	DO L=1,L_NLAYRAD
411	TAUV(L,NW,NG)=TAUCUMV(2*L,NW,NG)
412	END DO
413	TAUV(L,NW,NG)=TAUCUMV(2*L_NLAYRAD+1,NW,NG)
414	END DO
415	END DO ! end full gauss loop
416
417	if(firstcall) firstcall = .false.
418
419	return
420
421
422	end subroutine optcv

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