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optcv.F90 @ 1819

Last change on this file since 1819 was 1792, checked in by jvatant, 8 years ago

+ Found a bug for the limit cases in disr_haze leading to uninit. value.

Fixed by init to zero but should be relooked at.

+ Also added omp instructions in disr_haze
--JVO

Property svn:executable set to *

File size: 11.4 KB

Line
1	SUBROUTINE OPTCV(DTAUV,TAUV,TAUCUMV,PLEV, &
2	WBARV,COSBV,TAURAY,TMID,PMID,TAUGSURF)
3
4	use radinc_h
5	use radcommon_h, only: gasv, tlimit, Cmk, tgasref, pfgasref,wnov,scalep,indv,glat_ig,gweight
6	use gases_h
7	use comcstfi_mod, only: g, r
8	use callkeys_mod, only: continuum,graybody,callgasvis
9
10	implicit none
11
12	!==================================================================
13	!
14	! Purpose
15	! -------
16	! Calculates shortwave optical constants at each level.
17	!
18	! Authors
19	! -------
20	! Adapted from the NASA Ames code by R. Wordsworth (2009)
21	!
22	!==================================================================
23	!
24	! THIS SUBROUTINE SETS THE OPTICAL CONSTANTS IN THE VISUAL
25	! IT CALCULATES FOR EACH LAYER, FOR EACH SPECTRAL INTERVAL IN THE VISUAL
26	! LAYER: WBAR, DTAU, COSBAR
27	! LEVEL: TAU
28	!
29	! TAUV(L,NW,NG) is the cumulative optical depth at the top of radiation code
30	! layer L. NW is spectral wavelength interval, ng the Gauss point index.
31	!
32	! TLEV(L) - Temperature at the layer boundary
33	! PLEV(L) - Pressure at the layer boundary (i.e. level)
34	! GASV(NT,NPS,NW,NG) - Visible k-coefficients
35	!
36	!-------------------------------------------------------------------
37
38
39	real*8 DTAUV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
40	real*8 DTAUKV(L_LEVELS,L_NSPECTV,L_NGAUSS)
41	real*8 TAUV(L_NLEVRAD,L_NSPECTV,L_NGAUSS)
42	real*8 TAUCUMV(L_LEVELS,L_NSPECTV,L_NGAUSS)
43	real*8 PLEV(L_LEVELS)
44	real*8 TMID(L_LEVELS), PMID(L_LEVELS)
45	real*8 COSBV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
46	real*8 WBARV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
47
48	! Titan customisation
49	! J. Vatant d'Ollone (2016)
50	real*8 DHAZE_T(L_LEVELS,L_NSPECTI)
51	real*8 DHAZES_T(L_LEVELS,L_NSPECTI)
52	real*8 SSA_T(L_LEVELS,L_NSPECTI)
53	real*8 ASF_T(L_LEVELS,L_NSPECTI)
54	real*8 INT_DTAU(L_NLAYRAD,L_NSPECTI)
55	real*8 K_HAZE(L_NLAYRAD,L_NSPECTI)
56
57	CHARACTER*2 str2
58	! ==========================
59
60	integer L, NW, NG, K, LK, IAER
61	integer MT(L_LEVELS), MP(L_LEVELS), NP(L_LEVELS)
62	real*8 ANS, TAUGAS
63	real*8 TAURAY(L_NSPECTV)
64	real*8 TRAY(L_LEVELS,L_NSPECTV)
65	real*8 DPR(L_LEVELS), U(L_LEVELS)
66	real*8 LCOEF(4), LKCOEF(L_LEVELS,4)
67
68	real*8 taugsurf(L_NSPECTV,L_NGAUSS-1)
69	real*8 DCONT
70	real*8 DRAYAER
71	double precision wn_cont, p_cont, p_air, T_cont, dtemp, dtempc
72	double precision p_cross
73
74	real*8 KCOEF(4)
75
76	! temporary variable to reduce memory access time to gasv
77	real*8 tmpk(2,2)
78
79	! temporary variables for multiple aerosol calculation
80	real*8 atemp(L_NLAYRAD,L_NSPECTV)
81	real*8 btemp(L_NLAYRAD,L_NSPECTV)
82	real*8 ctemp(L_NLAYRAD,L_NSPECTV)
83
84	! variables for k in units m^-1
85	real*8 dz(L_LEVELS)
86
87	integer igas, jgas, ilay
88
89	integer interm
90
91	!! AS: to save time in computing continuum (see bilinearbig)
92	IF (.not.ALLOCATED(indv)) THEN
93	ALLOCATE(indv(L_NSPECTV,ngasmx,ngasmx))
94	indv = -9999 ! this initial value means "to be calculated"
95	ENDIF
96
97	! Some initialisation beacause there's a pb with disr_haze at the limits (nw=1)
98	! I should check this - For now we set vars to zero : better than nans - JVO 2017
99
100	dhaze_t(:,:) = 0.
101	ssa_t(:,:) = 0.
102	asf_t(:,:) = 0.
103
104
105	!=======================================================================
106	! Determine the total gas opacity throughout the column, for each
107	! spectral interval, NW, and each Gauss point, NG.
108	! Calculate the continuum opacities, i.e., those that do not depend on
109	! NG, the Gauss index.
110
111	taugsurf(:,:) = 0.0
112	dpr(:) = 0.0
113	lkcoef(:,:) = 0.0
114
115	do K=2,L_LEVELS
116	DPR(k) = PLEV(K)-PLEV(K-1)
117
118	! if we have continuum opacities, we need dz
119
120	dz(k) = dpr(k)RTMID(K)/(glat_ig*PMID(K))
121	U(k) = Cmk*DPR(k) ! only Cmk line in optcv.F
122
123	call tpindex(PMID(K),TMID(K),pfgasref,tgasref,LCOEF,MT(K),MP(K))
124
125	do LK=1,4
126	LKCOEF(K,LK) = LCOEF(LK)
127	end do
128	end do ! levels
129
130	! Rayleigh scattering
131	do NW=1,L_NSPECTV
132	do K=2,L_LEVELS
133	TRAY(K,NW) = TAURAY(NW) * DPR(K)
134	end do ! levels
135	end do
136
137	! we ignore K=1...
138	do K=2,L_LEVELS
139
140	ilay = k / 2 ! int. arithmetic => gives the gcm layer index
141
142	do NW=1,L_NSPECTV
143
144	!================= Titan customisation ========================================
145	call disr_haze(dz(k),plev(k),wnov(nw),dhaze_T(k,nw),SSA_T(k,nw),ASF_T(k,nw))
146	! =============================================================================
147
148	DRAYAER = TRAY(K,NW)
149	! DRAYAER is Tau RAYleigh scattering, plus AERosol opacity
150	DRAYAER = DRAYAER + DHAZE_T(K,NW) ! Titan's aerosol
151
152	DCONT = 0.0 ! continuum absorption
153
154	if(continuum.and.(.not.graybody).and.callgasvis)then
155	! include continua if necessary
156	wn_cont = dble(wnov(nw))
157	T_cont = dble(TMID(k))
158	do igas=1,ngasmx
159
160	p_cont = dble(PMID(k)scalepgfrac(igas,ilay))
161
162	dtemp=0.0
163	if(igas.eq.igas_N2)then
164
165	interm = indv(nw,igas,igas)
166	! call interpolateN2N2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
167	indv(nw,igas,igas) = interm
168	! only goes to 500 cm^-1, so unless we're around a cold brown dwarf, this is irrelevant in the visible
169
170	elseif(igas.eq.igas_H2)then
171
172	! first do self-induced absorption
173	interm = indv(nw,igas,igas)
174	call interpolateH2H2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
175	indv(nw,igas,igas) = interm
176
177	! then cross-interactions with other gases
178	do jgas=1,ngasmx
179	p_cross = dble(PMID(k)scalepgfrac(jgas,ilay))
180	dtempc = 0.0
181	if(jgas.eq.igas_N2)then
182	interm = indv(nw,igas,jgas)
183	call interpolateN2H2(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
184	indv(nw,igas,jgas) = interm
185	! should be irrelevant in the visible
186	endif
187	dtemp = dtemp + dtempc
188	enddo
189
190	elseif(igas.eq.igas_CH4)then
191
192	! first do self-induced absorption
193	interm = indv(nw,igas,igas)
194	call interpolateCH4CH4(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
195	indv(nw,igas,igas) = interm
196
197	! then cross-interactions with other gases
198	do jgas=1,ngasmx
199	p_cross = dble(PMID(k)scalepgfrac(jgas,ilay))
200	dtempc = 0.0
201	if(jgas.eq.igas_N2)then
202	interm = indv(nw,igas,jgas)
203	call interpolateN2CH4(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
204	indv(nw,igas,jgas) = interm
205	endif
206	dtemp = dtemp + dtempc
207	enddo
208
209	endif
210
211	DCONT = DCONT + dtemp
212
213	enddo
214
215	DCONT = DCONT*dz(k)
216
217	endif
218
219	do ng=1,L_NGAUSS-1
220
221	! Now compute TAUGAS
222
223	! JVO 2017 : added tmpk because the repeated calls to gasi/v increased dramatically
224	! the execution time of optci/v -> ~ factor 2 on the whole radiative
225	! transfer on the tested simulations !
226
227	tmpk = GASV(MT(K):MT(K)+1,MP(K):MP(K)+1,1,NW,NG)
228
229	KCOEF(1) = tmpk(1,1) ! KCOEF(1) = GASV(MT(K),MP(K),1,NW,NG)
230	KCOEF(2) = tmpk(1,2) ! KCOEF(2) = GASV(MT(K),MP(K)+1,1,NW,NG)
231	KCOEF(3) = tmpk(2,2) ! KCOEF(3) = GASV(MT(K)+1,MP(K)+1,1,NW,NG)
232	KCOEF(4) = tmpk(2,1) ! KCOEF(4) = GASV(MT(K)+1,MP(K),1,NW,NG)
233
234	! Interpolate the gaseous k-coefficients to the requested T,P values
235
236	ANS = LKCOEF(K,1)KCOEF(1) + LKCOEF(K,2)KCOEF(2) + &
237	LKCOEF(K,3)KCOEF(3) + LKCOEF(K,4)KCOEF(4)
238
239
240	TAUGAS = U(k)*ANS
241
242	TAUGSURF(NW,NG) = TAUGSURF(NW,NG) + TAUGAS + DCONT
243	DTAUKV(K,nw,ng) = TAUGAS &
244	+ DRAYAER & ! DRAYAER includes all scattering contributions
245	+ DCONT ! For parameterized continuum aborption
246
247	end do
248
249	! Now fill in the "clear" part of the spectrum (NG = L_NGAUSS),
250	! which holds continuum opacity only
251
252	NG = L_NGAUSS
253	DTAUKV(K,nw,ng) = DRAYAER + DCONT ! Scattering + parameterized continuum absorption, including Titan's haze
254
255	end do
256	end do
257
258
259	!=======================================================================
260	! Now the full treatment for the layers, where besides the opacity
261	! we need to calculate the scattering albedo and asymmetry factors
262
263	! Haze scattering
264	DO NW=1,L_NSPECTV
265	DO K=2,L_LEVELS
266	DHAZES_T(K,NW) = DHAZE_T(K,NW) * SSA_T(K,NW) ! effect of scattering albedo on haze
267	ENDDO
268	ENDDO
269
270
271	DO NW=1,L_NSPECTV
272	DO L=1,L_NLAYRAD-1
273	K = 2*L+1
274	atemp(L,NW) = ASF_T(K,NW)DHAZES_T(K,NW) + ASF_T(K+1,NW)DHAZES_T(K+1,NW)
275	btemp(L,NW) = DHAZES_T(K,NW) + DHAZES_T(K+1,NW)
276	ctemp(L,NW) = btemp(L,NW) + 0.9999*(TRAY(K,NW) + TRAY(K+1,NW)) ! JVO 2017 : does this 0.999 is really meaningful ?
277	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW) + TRAY(K+1,NW)
278	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
279	END DO ! L vertical loop
280
281	! Last level
282	L = L_NLAYRAD
283	K = 2*L+1
284	atemp(L,NW) = ASF_T(K,NW)*DHAZES_T(K,NW)
285	btemp(L,NW) = DHAZES_T(K,NW)
286	ctemp(L,NW) = btemp(L,NW) + 0.9999*TRAY(K,NW) ! JVO 2017 : does this 0.999 is really meaningful ?
287	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW)
288	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
289
290
291	END DO ! NW spectral loop
292
293	DO NG=1,L_NGAUSS
294	DO NW=1,L_NSPECTV
295	DO L=1,L_NLAYRAD-1
296
297	K = 2*L+1
298	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG) + DTAUKV(K+1,NW,NG)
299	WBARV(L,nw,ng) = ctemp(L,NW) / DTAUV(L,nw,ng)
300
301	END DO ! L vertical loop
302
303	! Last level
304
305	L = L_NLAYRAD
306	K = 2*L+1
307	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG)
308
309	WBARV(L,NW,NG) = ctemp(L,NW) / DTAUV(L,NW,NG)
310
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	! Titan's outputs (JVO, 2016)===============================================
332	! do l=1,L_NLAYRAD
333	! do nw=1,L_NSPECTV
334	! INT_DTAU(L,NW) = 0.0d+0
335	! DO NG=1,L_NGAUSS
336	! INT_DTAU(L,NW)= INT_DTAU(L,NW) + dtauv(L,nw,ng)*gweight(NG)
337	! enddo
338	! enddo
339	! enddo
340
341	! do nw=1,L_NSPECTV
342	! write(str2,'(i2.2)') nw
343	! 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))
344	! 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))
345	! enddo
346
347	! ==============================================================================
348
349
350	return
351
352
353	end subroutine optcv

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