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optcv.F90 @ 1648

Last change on this file since 1648 was 1648, checked in by jvatant, 8 years ago

Modifications to custom radiative transfer to Titan
+ Enables an altitude dependant gfrac for CIA computations

-> many radical changes in su_gases and co ..
-> read vertical CH4 profile with call_profilgases
-> Now you need a 'profile.def' that I will add in the deftank

+ Added interpolate CIA routines for CH4
+ Added temporary mean aerosol profile opacity routine (disr_haze)

Property svn:executable set to *

File size: 12.1 KB

Line
1	SUBROUTINE OPTCV(DTAUV,TAUV,TAUCUMV,PLEV, &
2	QXVAER,QSVAER,GVAER,WBARV,COSBV, &
3	TAURAY,TAUAERO,TMID,PMID,TAUGSURF,GWEIGHT)
4
5	use radinc_h
6	use radcommon_h, only: gasv, tlimit, Cmk, tgasref, pfgasref,wnov,scalep,indv,glat_ig
7	use gases_h
8	use comcstfi_mod, only: g, r
9	use callkeys_mod, only: continuum,graybody,callgasvis
10
11	implicit none
12
13	!==================================================================
14	!
15	! Purpose
16	! -------
17	! Calculates shortwave optical constants at each level.
18	!
19	! Authors
20	! -------
21	! Adapted from the NASA Ames code by R. Wordsworth (2009)
22	!
23	!==================================================================
24	!
25	! THIS SUBROUTINE SETS THE OPTICAL CONSTANTS IN THE VISUAL
26	! IT CALCUALTES FOR EACH LAYER, FOR EACH SPECRAL INTERVAL IN THE VISUAL
27	! LAYER: WBAR, DTAU, COSBAR
28	! LEVEL: TAU
29	!
30	! TAUV(L,NW,NG) is the cumulative optical depth at the top of radiation code
31	! layer L. NW is spectral wavelength interval, ng the Gauss point index.
32	!
33	! TLEV(L) - Temperature at the layer boundary
34	! PLEV(L) - Pressure at the layer boundary (i.e. level)
35	! GASV(NT,NPS,NW,NG) - Visible k-coefficients
36	!
37	!-------------------------------------------------------------------
38
39
40	real*8 DTAUV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
41	real*8 DTAUKV(L_LEVELS+1,L_NSPECTV,L_NGAUSS)
42	real*8 TAUV(L_NLEVRAD,L_NSPECTV,L_NGAUSS)
43	real*8 TAUCUMV(L_LEVELS,L_NSPECTV,L_NGAUSS)
44	real*8 PLEV(L_LEVELS)
45	real*8 TMID(L_LEVELS), PMID(L_LEVELS)
46	real*8 COSBV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
47	real*8 WBARV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
48
49	! for aerosols
50	real*8 QXVAER(L_LEVELS+1,L_NSPECTV,NAERKIND)
51	real*8 QSVAER(L_LEVELS+1,L_NSPECTV,NAERKIND)
52	real*8 GVAER(L_LEVELS+1,L_NSPECTV,NAERKIND)
53	real*8 TAUAERO(L_LEVELS+1,NAERKIND)
54	real*8 TAUAEROLK(L_LEVELS+1,L_NSPECTV,NAERKIND)
55	real*8 TAEROS(L_LEVELS,L_NSPECTV,NAERKIND)
56
57	! Titan customisation
58	! J. Vatant d'Ollone (2016)
59	real*8 GWEIGHT(L_NGAUSS)
60	real*8 DHAZE_T(L_LEVELS+1,L_NSPECTI)
61	real*8 DHAZES_T(L_LEVELS+1,L_NSPECTI)
62	real*8 SSA_T(L_LEVELS+1,L_NSPECTI)
63	real*8 ASF_T(L_LEVELS+1,L_NSPECTI)
64	real*8 INT_DTAU(L_NLAYRAD,L_NSPECTI)
65	real*8 K_HAZE(L_NLAYRAD,L_NSPECTI)
66
67	CHARACTER*2 str2
68	! ==========================
69
70	integer L, NW, NG, K, LK, IAER
71	integer MT(L_LEVELS), MP(L_LEVELS), NP(L_LEVELS)
72	real*8 ANS, TAUGAS
73	real*8 TAURAY(L_NSPECTV)
74	real*8 TRAY(L_LEVELS,L_NSPECTV)
75	real*8 TRAYAER
76	real*8 DPR(L_LEVELS), U(L_LEVELS)
77	real*8 LCOEF(4), LKCOEF(L_LEVELS,4)
78
79	real*8 taugsurf(L_NSPECTV,L_NGAUSS-1)
80	real*8 DCONT,DAERO
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 variables for multiple aerosol calculation
87	real*8 atemp(L_NLAYRAD,L_NSPECTV)
88	real*8 btemp(L_NLAYRAD,L_NSPECTV)
89	real*8 ctemp(L_NLAYRAD,L_NSPECTV)
90
91	! variables for k in units m^-1
92	real*8 dz(L_LEVELS)
93
94	integer igas, jgas, ilay
95
96	integer interm
97
98	!! AS: to save time in computing continuum (see bilinearbig)
99	IF (.not.ALLOCATED(indv)) THEN
100	ALLOCATE(indv(L_NSPECTV,ngasmx,ngasmx))
101	indv = -9999 ! this initial value means "to be calculated"
102	ENDIF
103
104	!=======================================================================
105	! Determine the total gas opacity throughout the column, for each
106	! spectral interval, NW, and each Gauss point, NG.
107	! Calculate the continuum opacities, i.e., those that do not depend on
108	! NG, the Gauss index.
109
110	taugsurf(:,:) = 0.0
111	dpr(:) = 0.0
112	lkcoef(:,:) = 0.0
113
114	do K=2,L_LEVELS
115	DPR(k) = PLEV(K)-PLEV(K-1)
116
117	! if we have continuum opacities, we need dz
118
119	dz(k) = dpr(k)RTMID(K)/(glat_ig*PMID(K))
120	U(k) = Cmk*DPR(k) ! only Cmk line in optcv.F
121
122	call tpindex(PMID(K),TMID(K),pfgasref,tgasref,LCOEF,MT(K),MP(K))
123
124	do LK=1,4
125	LKCOEF(K,LK) = LCOEF(LK)
126	end do
127	end do ! levels
128
129
130	do iaer=1,naerkind
131	do NW=1,L_NSPECTV
132	do K=2,L_LEVELS
133	TAEROS(K,NW,IAER) = TAUAERO(K,IAER) * QXVAER(K,NW,IAER)
134	end do ! levels
135	end do
136	end do
137	do NW=1,L_NSPECTV
138	do K=2,L_LEVELS
139	TRAY(K,NW) = TAURAY(NW) * DPR(K)
140	end do ! levels
141	end do
142
143	! we ignore K=1...
144	do K=2,L_LEVELS
145
146	ilay = k / 2 ! int. arithmetic => gives the gcm layer index
147
148	do NW=1,L_NSPECTV
149
150	TRAYAER = TRAY(K,NW)
151	! TRAYAER is Tau RAYleigh scattering, plus AERosol opacity
152	do iaer=1,naerkind
153	TRAYAER = TRAYAER + TAEROS(K,NW,IAER)
154	end do
155
156	DCONT = 0.0 ! continuum absorption
157
158	if(continuum.and.(.not.graybody).and.callgasvis)then
159	! include continua if necessary
160	wn_cont = dble(wnov(nw))
161	T_cont = dble(TMID(k))
162	do igas=1,ngasmx
163
164	p_cont = dble(PMID(k)scalepgfrac(igas,ilay))
165
166	dtemp=0.0
167	if(igas.eq.igas_N2)then
168
169	interm = indv(nw,igas,igas)
170	! call interpolateN2N2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
171	indv(nw,igas,igas) = interm
172	! only goes to 500 cm^-1, so unless we're around a cold brown dwarf, this is irrelevant in the visible
173
174	elseif(igas.eq.igas_H2)then
175
176	! first do self-induced absorption
177	interm = indv(nw,igas,igas)
178	call interpolateH2H2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
179	indv(nw,igas,igas) = interm
180
181	! then cross-interactions with other gases
182	do jgas=1,ngasmx
183	p_cross = dble(PMID(k)scalepgfrac(jgas,ilay))
184	dtempc = 0.0
185	if(jgas.eq.igas_N2)then
186	interm = indv(nw,igas,jgas)
187	call interpolateN2H2(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
188	indv(nw,igas,jgas) = interm
189	! should be irrelevant in the visible
190	endif
191	dtemp = dtemp + dtempc
192	enddo
193
194	elseif(igas.eq.igas_CH4)then
195
196	! first do self-induced absorption
197	interm = indv(nw,igas,igas)
198	call interpolateCH4CH4(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
199	indv(nw,igas,igas) = interm
200
201	! then cross-interactions with other gases
202	do jgas=1,ngasmx
203	p_cross = dble(PMID(k)scalepgfrac(jgas,ilay))
204	dtempc = 0.0
205	if(jgas.eq.igas_N2)then
206	interm = indv(nw,igas,jgas)
207	call interpolateN2CH4(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
208	indv(nw,igas,jgas) = interm
209	endif
210	dtemp = dtemp + dtempc
211	enddo
212
213	endif
214
215	DCONT = DCONT + dtemp
216
217	enddo
218
219	DCONT = DCONT*dz(k)
220
221	endif
222
223	!================= Titan customisation ========================================
224	call disr_haze(dz(k),plev(k),wnov(nw),dhaze_T(k,nw),SSA_T(k,nw),ASF_T(k,nw))
225	! =============================================================================
226
227	do ng=1,L_NGAUSS-1
228
229	! Now compute TAUGAS
230
231	KCOEF(1) = GASV(MT(K),MP(K),1,NW,NG)
232	KCOEF(2) = GASV(MT(K),MP(K)+1,1,NW,NG)
233	KCOEF(3) = GASV(MT(K)+1,MP(K)+1,1,NW,NG)
234	KCOEF(4) = GASV(MT(K)+1,MP(K),1,NW,NG)
235
236	! Interpolate the gaseous k-coefficients to the requested T,P values
237
238	ANS = LKCOEF(K,1)KCOEF(1) + LKCOEF(K,2)KCOEF(2) + &
239	LKCOEF(K,3)KCOEF(3) + LKCOEF(K,4)KCOEF(4)
240
241	TAUGAS = U(k)*ANS
242
243	TAUGSURF(NW,NG) = TAUGSURF(NW,NG) + TAUGAS + DCONT
244	DTAUKV(K,nw,ng) = TAUGAS &
245	+ TRAYAER & ! TRAYAER includes all scattering contributions
246	+ DCONT & ! For parameterized continuum aborption
247	+ DHAZE_T(K,NW) ! For Titan haze
248
249	end do
250
251	! Now fill in the "clear" part of the spectrum (NG = L_NGAUSS),
252	! which holds continuum opacity only
253
254	NG = L_NGAUSS
255	DTAUKV(K,nw,ng) = TRAY(K,NW) + DCONT & ! For parameterized continuum absorption
256	+ DHAZE_T(K,NW) ! For Titan haze
257
258	do iaer=1,naerkind
259	DTAUKV(K,nw,ng) = DTAUKV(K,nw,ng) + TAEROS(K,NW,IAER)
260	end do ! a bug was here!
261
262	end do
263	end do
264
265
266	!=======================================================================
267	! Now the full treatment for the layers, where besides the opacity
268	! we need to calculate the scattering albedo and asymmetry factors
269	! ======================================================================
270
271	do iaer=1,naerkind
272	DO NW=1,L_NSPECTV
273	DO K=2,L_LEVELS ! AS: shouldn't this be L_LEVELS+1 ? (see optci)
274	TAUAEROLK(K,NW,IAER) = TAUAERO(K,IAER) * QSVAER(K,NW,IAER)
275	ENDDO
276	ENDDO
277	end do
278
279	! Haze scattering
280	DO NW=1,L_NSPECTV
281	DO K=2,L_LEVELS+1
282	DHAZES_T(K,NW) = DHAZE_T(K,NW) * SSA_T(K,NW)
283	ENDDO
284	ENDDO
285
286
287	DO NW=1,L_NSPECTV
288	DO L=1,L_NLAYRAD-1
289	K = 2*L+1
290
291	atemp(L,NW) = SUM(GVAER(K,NW,1:naerkind) * TAUAEROLK(K,NW,1:naerkind)) &
292	+ SUM(GVAER(K+1,NW,1:naerkind) * TAUAEROLK(K+1,NW,1:naerkind)) &
293	+ ASF_T(K,NW)*DHAZES_T(K,NW)
294
295	btemp(L,NW) = SUM(TAUAEROLK(K,NW,1:naerkind)) + SUM(TAUAEROLK(K+1,NW,1:naerkind)) &
296	+ DHAZES_T(K,NW)
297
298	ctemp(L,NW) = btemp(L,NW) + 0.9999*(TRAY(K,NW) + TRAY(K+1,NW))
299	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW) + TRAY(K+1,NW)
300	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
301	END DO ! L vertical loop
302
303	!last level
304	L = L_NLAYRAD
305	K = 2*L+1
306
307	atemp(L,NW) = SUM(GVAER(K,NW,1:naerkind) * TAUAEROLK(K,NW,1:naerkind)) &
308	+ ASF_T(K,NW)*DHAZES_T(K,NW)
309	btemp(L,NW) = SUM(TAUAEROLK(K,NW,1:naerkind)) &
310	+ DHAZES_T(K,NW)
311	ctemp(L,NW) = btemp(L,NW) + 0.9999*TRAY(K,NW)
312	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW)
313	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
314
315
316	END DO ! NW spectral loop
317
318	! ===========================================================================================
319
320	DO NG=1,L_NGAUSS
321	DO NW=1,L_NSPECTV
322	DO L=1,L_NLAYRAD-1
323
324	K = 2*L+1
325	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG) + DTAUKV(K+1,NW,NG)
326	WBARV(L,nw,ng) = ctemp(L,NW) / DTAUV(L,nw,ng)
327
328	END DO ! L vertical loop
329
330	! No vertical averaging on bottom layer
331
332	L = L_NLAYRAD
333	K = 2*L+1
334	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG)
335
336	WBARV(L,NW,NG) = ctemp(L,NW) / DTAUV(L,NW,NG)
337
338	END DO ! NW spectral loop
339	END DO ! NG Gauss loop
340
341	! Total extinction optical depths
342
343	DO NG=1,L_NGAUSS ! full gauss loop
344	DO NW=1,L_NSPECTV
345	TAUV(1,NW,NG)=0.0D0
346	DO L=1,L_NLAYRAD
347	TAUV(L+1,NW,NG)=TAUV(L,NW,NG)+DTAUV(L,NW,NG)
348	END DO
349
350	TAUCUMV(1,NW,NG)=0.0D0
351	DO K=2,L_LEVELS
352	TAUCUMV(K,NW,NG)=TAUCUMV(K-1,NW,NG)+DTAUKV(K,NW,NG)
353	END DO
354	END DO
355	END DO ! end full gauss loop
356
357
358	! Titan's outputs (J.V.O, 2016)===============================================
359	! do l=1,L_NLAYRAD
360	! do nw=1,L_NSPECTV
361	! INT_DTAU(L,NW) = 0.0d+0
362	! DO NG=1,L_NGAUSS
363	! INT_DTAU(L,NW)= INT_DTAU(L,NW) + dtauv(L,nw,ng)*gweight(NG)
364	! enddo
365	! enddo
366	! enddo
367
368	! do nw=1,L_NSPECTV
369	! write(str2,'(i2.2)') nw
370	! call writediagfi(1,'kgv'//str2,'Gaz extinction coefficient VI band '//str2,'m-1',1,int_dtau(L_NLAYRAD:1:-1,nw)/dz_lay(L_NLAYRAD:1:-1))
371	! call writediagfi(1,'khv'//str2,'Haze extinction coefficient VI band '//str2,'m-1',1,k_haze(L_NLAYRAD:1:-1,nw)/dz_lay(L_NLAYRAD:1:-1))
372	! enddo
373
374	! ==============================================================================
375
376
377	return
378
379
380	end subroutine optcv

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