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optcv.F90 @ 1647

Last change on this file since 1647 was 1647, checked in by jvatant, 8 years ago

+ Major clean of the new LMDZ.TITAN from too-generic options and routines (water, co2, ocean, surface type ...)
+ From this revision LMDZ.TITAN begins to be really separated from LMDZ.GENERIC
+ Partial desactivation of aerosols, only the dummy case is still enabled to keep the code running ( new aerosol routines to come in followings commits )

JVO

Property svn:executable set to *

File size: 10.8 KB

Line
1	SUBROUTINE OPTCV(DTAUV,TAUV,TAUCUMV,PLEV, &
2	QXVAER,QSVAER,GVAER,WBARV,COSBV, &
3	TAURAY,TAUAERO,TMID,PMID,TAUGSURF,QVAR,MUVAR)
4
5	use radinc_h
6	use radcommon_h, only: gasv, tlimit, wrefVAR, Cmk, tgasref, pfgasref,wnov,scalep,indv,glat_ig
7	use gases_h
8	use comcstfi_mod, only: g, r, mugaz
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	integer L, NW, NG, K, LK, IAER
58	integer MT(L_LEVELS), MP(L_LEVELS), NP(L_LEVELS)
59	real*8 ANS, TAUGAS
60	real*8 TAURAY(L_NSPECTV)
61	real*8 TRAY(L_LEVELS,L_NSPECTV)
62	real*8 TRAYAER
63	real*8 DPR(L_LEVELS), U(L_LEVELS)
64	real*8 LCOEF(4), LKCOEF(L_LEVELS,4)
65
66	real*8 taugsurf(L_NSPECTV,L_NGAUSS-1)
67	real*8 DCONT,DAERO
68	double precision wn_cont, p_cont, p_air, T_cont, dtemp, dtempc
69	double precision p_cross
70
71	! variable species mixing ratio variables
72	real*8 QVAR(L_LEVELS), WRATIO(L_LEVELS), MUVAR(L_LEVELS)
73	real*8 KCOEF(4)
74	integer NVAR(L_LEVELS)
75
76	! temporary variables for multiple aerosol calculation
77	real*8 atemp(L_NLAYRAD,L_NSPECTV)
78	real*8 btemp(L_NLAYRAD,L_NSPECTV)
79	real*8 ctemp(L_NLAYRAD,L_NSPECTV)
80
81	! variables for k in units m^-1
82	real*8 dz(L_LEVELS)
83
84	integer igas, jgas
85
86	integer interm
87
88	!! AS: to save time in computing continuum (see bilinearbig)
89	IF (.not.ALLOCATED(indv)) THEN
90	ALLOCATE(indv(L_NSPECTV,ngasmx,ngasmx))
91	indv = -9999 ! this initial value means "to be calculated"
92	ENDIF
93
94	!=======================================================================
95	! Determine the total gas opacity throughout the column, for each
96	! spectral interval, NW, and each Gauss point, NG.
97	! Calculate the continuum opacities, i.e., those that do not depend on
98	! NG, the Gauss index.
99
100	taugsurf(:,:) = 0.0
101	dpr(:) = 0.0
102	lkcoef(:,:) = 0.0
103
104	do K=2,L_LEVELS
105	DPR(k) = PLEV(K)-PLEV(K-1)
106
107	! if we have continuum opacities, we need dz
108
109	dz(k) = dpr(k)RTMID(K)/(glat_igPMID(K))mugaz/muvar(k)
110	U(k) = CmkDPR(k)mugaz/muvar(k) ! only Cmk line in optci.F
111	!JL13 the mugaz/muvar factor takes into account water meanmolecular weight if water is present
112
113
114	call tpindex(PMID(K),TMID(K),QVAR(K),pfgasref,tgasref,WREFVAR, &
115	LCOEF,MT(K),MP(K),NVAR(K),WRATIO(K))
116
117	do LK=1,4
118	LKCOEF(K,LK) = LCOEF(LK)
119	end do
120	end do ! levels
121
122
123	do iaer=1,naerkind
124	do NW=1,L_NSPECTV
125	do K=2,L_LEVELS
126	TAEROS(K,NW,IAER) = TAUAERO(K,IAER) * QXVAER(K,NW,IAER)
127	end do ! levels
128	end do
129	end do
130	do NW=1,L_NSPECTV
131	do K=2,L_LEVELS
132	TRAY(K,NW) = TAURAY(NW) * DPR(K)
133	end do ! levels
134	end do
135
136	! we ignore K=1...
137	do K=2,L_LEVELS
138
139	do NW=1,L_NSPECTV
140
141	TRAYAER = TRAY(K,NW)
142	! TRAYAER is Tau RAYleigh scattering, plus AERosol opacity
143	do iaer=1,naerkind
144	TRAYAER = TRAYAER + TAEROS(K,NW,IAER)
145	end do
146
147	DCONT = 0.0 ! continuum absorption
148
149	if(continuum.and.(.not.graybody).and.callgasvis)then
150	! include continua if necessary
151	wn_cont = dble(wnov(nw))
152	T_cont = dble(TMID(k))
153	do igas=1,ngasmx
154
155	if(gfrac(igas).eq.-1)then ! variable
156	p_cont = dble(PMID(k)scalepQVAR(k)) ! qvar = mol/mol
157	else
158	p_cont = dble(PMID(k)scalepgfrac(igas)*(1.-QVAR(k)))
159	endif
160
161	dtemp=0.0
162	if(igas.eq.igas_N2)then
163
164	interm = indv(nw,igas,igas)
165	! call interpolateN2N2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
166	indv(nw,igas,igas) = interm
167	! only goes to 500 cm^-1, so unless we're around a cold brown dwarf, this is irrelevant in the visible
168
169	elseif(igas.eq.igas_H2)then
170
171	! first do self-induced absorption
172	interm = indv(nw,igas,igas)
173	call interpolateH2H2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
174	indv(nw,igas,igas) = interm
175
176	! then cross-interactions with other gases
177	do jgas=1,ngasmx
178	p_cross = dble(PMID(k)scalepgfrac(jgas)*(1.-QVAR(k)))
179	dtempc = 0.0
180	if(jgas.eq.igas_N2)then
181	interm = indv(nw,igas,jgas)
182	call interpolateN2H2(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
183	indv(nw,igas,jgas) = interm
184	! should be irrelevant in the visible
185	endif
186	dtemp = dtemp + dtempc
187	enddo
188
189	endif
190
191	DCONT = DCONT + dtemp
192
193	enddo
194
195	DCONT = DCONT*dz(k)
196
197	endif
198
199	do ng=1,L_NGAUSS-1
200
201	! Now compute TAUGAS
202
203	! Interpolate between water mixing ratios
204	! WRATIO = 0.0 if the requested water amount is equal to, or outside the
205	! the water data range
206
207	if(L_REFVAR.eq.1)then ! added by RW for special no variable case
208	KCOEF(1) = GASV(MT(K),MP(K),1,NW,NG)
209	KCOEF(2) = GASV(MT(K),MP(K)+1,1,NW,NG)
210	KCOEF(3) = GASV(MT(K)+1,MP(K)+1,1,NW,NG)
211	KCOEF(4) = GASV(MT(K)+1,MP(K),1,NW,NG)
212	else
213
214	KCOEF(1) = GASV(MT(K),MP(K),NVAR(K),NW,NG) + WRATIO(K)* &
215	(GASV(MT(K),MP(K),NVAR(K)+1,NW,NG) - &
216	GASV(MT(K),MP(K),NVAR(K),NW,NG))
217
218	KCOEF(2) = GASV(MT(K),MP(K)+1,NVAR(K),NW,NG) + WRATIO(K)* &
219	(GASV(MT(K),MP(K)+1,NVAR(K)+1,NW,NG) - &
220	GASV(MT(K),MP(K)+1,NVAR(K),NW,NG))
221
222	KCOEF(3) = GASV(MT(K)+1,MP(K)+1,NVAR(K),NW,NG) + WRATIO(K)*&
223	(GASV(MT(K)+1,MP(K)+1,NVAR(K)+1,NW,NG) - &
224	GASV(MT(K)+1,MP(K)+1,NVAR(K),NW,NG))
225
226	KCOEF(4) = GASV(MT(K)+1,MP(K),NVAR(K),NW,NG) + WRATIO(K)* &
227	(GASV(MT(K)+1,MP(K),NVAR(K)+1,NW,NG) - &
228	GASV(MT(K)+1,MP(K),NVAR(K),NW,NG))
229
230	endif
231
232	! Interpolate the gaseous k-coefficients to the requested T,P values
233
234	ANS = LKCOEF(K,1)KCOEF(1) + LKCOEF(K,2)KCOEF(2) + &
235	LKCOEF(K,3)KCOEF(3) + LKCOEF(K,4)KCOEF(4)
236
237	TAUGAS = U(k)*ANS
238
239	TAUGSURF(NW,NG) = TAUGSURF(NW,NG) + TAUGAS + DCONT
240	DTAUKV(K,nw,ng) = TAUGAS &
241	+ TRAYAER & ! TRAYAER includes all scattering contributions
242	+ DCONT ! For parameterized continuum aborption
243
244	end do
245
246	! Now fill in the "clear" part of the spectrum (NG = L_NGAUSS),
247	! which holds continuum opacity only
248
249	NG = L_NGAUSS
250	DTAUKV(K,nw,ng) = TRAY(K,NW) + DCONT ! For parameterized continuum absorption
251
252	do iaer=1,naerkind
253	DTAUKV(K,nw,ng) = DTAUKV(K,nw,ng) + TAEROS(K,NW,IAER)
254	end do ! a bug was here!
255
256	end do
257	end do
258
259
260	!=======================================================================
261	! Now the full treatment for the layers, where besides the opacity
262	! we need to calculate the scattering albedo and asymmetry factors
263
264	do iaer=1,naerkind
265	DO NW=1,L_NSPECTV
266	DO K=2,L_LEVELS ! AS: shouldn't this be L_LEVELS+1 ? (see optci)
267	TAUAEROLK(K,NW,IAER) = TAUAERO(K,IAER) * QSVAER(K,NW,IAER)
268	ENDDO
269	ENDDO
270	end do
271
272	DO NW=1,L_NSPECTV
273	DO L=1,L_NLAYRAD-1
274	K = 2*L+1
275	atemp(L,NW) = SUM(GVAER(K,NW,1:naerkind) * TAUAEROLK(K,NW,1:naerkind))+SUM(GVAER(K+1,NW,1:naerkind) * TAUAEROLK(K+1,NW,1:naerkind))
276	btemp(L,NW) = SUM(TAUAEROLK(K,NW,1:naerkind)) + SUM(TAUAEROLK(K+1,NW,1:naerkind))
277	ctemp(L,NW) = btemp(L,NW) + 0.9999*(TRAY(K,NW) + TRAY(K+1,NW))
278	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW) + TRAY(K+1,NW)
279	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
280	END DO ! L vertical loop
281
282	!last level
283	L = L_NLAYRAD
284	K = 2*L+1
285	atemp(L,NW) = SUM(GVAER(K,NW,1:naerkind) * TAUAEROLK(K,NW,1:naerkind))
286	btemp(L,NW) = SUM(TAUAEROLK(K,NW,1:naerkind))
287	ctemp(L,NW) = btemp(L,NW) + 0.9999*TRAY(K,NW)
288	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW)
289	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
290
291
292	END DO ! NW spectral loop
293
294	DO NG=1,L_NGAUSS
295	DO NW=1,L_NSPECTV
296	DO L=1,L_NLAYRAD-1
297
298	K = 2*L+1
299	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG) + DTAUKV(K+1,NW,NG)
300	WBARV(L,nw,ng) = ctemp(L,NW) / DTAUV(L,nw,ng)
301
302	END DO ! L vertical loop
303
304	! No vertical averaging on bottom layer
305
306	L = L_NLAYRAD
307	K = 2*L+1
308	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG)
309
310	WBARV(L,NW,NG) = ctemp(L,NW) / DTAUV(L,NW,NG)
311	END DO ! NW spectral loop
312	END DO ! NG Gauss loop
313
314	! Total extinction optical depths
315
316	DO NG=1,L_NGAUSS ! full gauss loop
317	DO NW=1,L_NSPECTV
318	TAUV(1,NW,NG)=0.0D0
319	DO L=1,L_NLAYRAD
320	TAUV(L+1,NW,NG)=TAUV(L,NW,NG)+DTAUV(L,NW,NG)
321	END DO
322
323	TAUCUMV(1,NW,NG)=0.0D0
324	DO K=2,L_LEVELS
325	TAUCUMV(K,NW,NG)=TAUCUMV(K-1,NW,NG)+DTAUKV(K,NW,NG)
326	END DO
327	END DO
328	END DO ! end full gauss loop
329
330
331	return
332
333
334	end subroutine optcv

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