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optcv.F90 @ 2046

Last change on this file since 2046 was 2046, checked in by jvatant, 6 years ago
Add a simple seasonal+latitudinal variation model (season_haze.F90) for the vertical mean profile of haze. Based on Karkoscha,2016 . Activable through "seashaze" key (default=T). --JVO
Property svn:executable set to ``*
File size: 13.3 KB

Line
1	SUBROUTINE OPTCV(PQO,NLAY,PLEV,TMID,PMID, &
2	DTAUV,TAUV,TAUCUMV,WBARV,COSBV,TAURAY,TAUGSURF,SEASHAZEFACT)
3
4	use radinc_h
5	use radcommon_h, only: gasv,tlimit,Cmk,gzlat_ig,tgasref,pfgasref,wnov,scalep,indv,gweight
6	use gases_h
7	use comcstfi_mod, only: r
8	use callkeys_mod, only: continuum,graybody,callgasvis,callclouds,callmufi,seashaze,uncoupl_optic_haze
9	use tracer_h, only: nmicro,nice
10	use MMP_OPTICS
11
12	implicit none
13
14	!==================================================================
15	!
16	! Purpose
17	! -------
18	! Calculates shortwave optical constants at each level.
19	!
20	! Authors
21	! -------
22	! Adapted from the NASA Ames code by R. Wordsworth (2009)
23	! Clean and adaptation to Titan by J. Vatant d'Ollone (2016-17)
24	!
25	!==================================================================
26	!
27	! THIS SUBROUTINE SETS THE OPTICAL CONSTANTS IN THE VISUAL
28	! IT CALCULATES FOR EACH LAYER, FOR EACH SPECTRAL INTERVAL IN THE VISUAL
29	! LAYER: WBAR, DTAU, COSBAR
30	! LEVEL: TAU
31	!
32	! TAUV(L,NW,NG) is the cumulative optical depth at the top of radiation code
33	! layer L. NW is spectral wavelength interval, ng the Gauss point index.
34	!
35	! TLEV(L) - Temperature at the layer boundary
36	! PLEV(L) - Pressure at the layer boundary (i.e. level)
37	! GASV(NT,NPS,NW,NG) - Visible k-coefficients
38	!
39	!-------------------------------------------------------------------
40
41
42	!==========================================================
43	! Input/Output
44	!==========================================================
45	REAL*8, INTENT(IN) :: PQO(nlay,nmicro) ! Tracers (X/m2).
46	INTEGER, INTENT(IN) :: NLAY ! Number of pressure layers (for pqo)
47	REAL*8, INTENT(IN) :: PLEV(L_LEVELS)
48	REAL*8, INTENT(IN) :: TMID(L_LEVELS), PMID(L_LEVELS)
49	REAL*8, INTENT(IN) :: TAURAY(L_NSPECTV)
50	REAL*8, INTENT(IN) :: SEASHAZEFACT(L_LEVELS)
51
52	REAL*8, INTENT(OUT) :: DTAUV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
53	REAL*8, INTENT(OUT) :: TAUV(L_NLEVRAD,L_NSPECTV,L_NGAUSS)
54	REAL*8, INTENT(OUT) :: TAUCUMV(L_LEVELS,L_NSPECTV,L_NGAUSS)
55	REAL*8, INTENT(OUT) :: COSBV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
56	REAL*8, INTENT(OUT) :: WBARV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
57	REAL*8, INTENT(OUT) :: TAUGSURF(L_NSPECTV,L_NGAUSS-1)
58	! ==========================================================
59
60	real*8 DTAUKV(L_LEVELS,L_NSPECTV,L_NGAUSS)
61
62	! Titan customisation
63	! J. Vatant d'Ollone (2016)
64	real*8 DHAZE_T(L_LEVELS,L_NSPECTI)
65	real*8 DHAZES_T(L_LEVELS,L_NSPECTI)
66	real*8 SSA_T(L_LEVELS,L_NSPECTI)
67	real*8 ASF_T(L_LEVELS,L_NSPECTI)
68	real*8 INT_DTAU(L_NLAYRAD,L_NSPECTI)
69	real*8 K_HAZE(L_NLAYRAD,L_NSPECTI)
70
71	CHARACTER*2 str2
72	! ==========================
73
74	integer L, NW, NG, K, LK, IAER
75	integer MT(L_LEVELS), MP(L_LEVELS), NP(L_LEVELS)
76	real*8 ANS, TAUGAS
77	real*8 TRAY(L_LEVELS,L_NSPECTV)
78	real*8 DPR(L_LEVELS), U(L_LEVELS)
79	real*8 LCOEF(4), LKCOEF(L_LEVELS,4)
80
81	real*8 DCONT
82	real*8 DRAYAER
83	double precision wn_cont, p_cont, p_air, T_cont, dtemp, dtempc
84	double precision p_cross
85
86	real*8 KCOEF(4)
87
88	! temporary variable to reduce memory access time to gasv
89	real*8 tmpk(2,2)
90
91	! temporary variables for multiple aerosol calculation
92	real*8 atemp(L_NLAYRAD,L_NSPECTV)
93	real*8 btemp(L_NLAYRAD,L_NSPECTV)
94	real*8 ctemp(L_NLAYRAD,L_NSPECTV)
95
96	! variables for k in units m^-1
97	real*8 dz(L_LEVELS)
98
99	integer igas, jgas, ilay
100
101	integer interm
102
103	real*8 m0as,m3as,m0af,m3af
104	real*8 ext_s,sca_s,ssa_s,asf_s
105	real*8 ext_f,sca_f,ssa_f,asf_f
106	logical,save :: firstcall=.true.
107	!$OMP THREADPRIVATE(firstcall)
108
109
110	!! AS: to save time in computing continuum (see bilinearbig)
111	IF (.not.ALLOCATED(indv)) THEN
112	ALLOCATE(indv(L_NSPECTV,ngasmx,ngasmx))
113	indv = -9999 ! this initial value means "to be calculated"
114	ENDIF
115
116	! Some initialisation beacause there's a pb with disr_haze at the limits (nw=1)
117	! I should check this - For now we set vars to zero : better than nans - JVO 2017
118
119	dhaze_t(:,:) = 0.
120	ssa_t(:,:) = 0.
121	asf_t(:,:) = 0.
122
123
124	!=======================================================================
125	! Determine the total gas opacity throughout the column, for each
126	! spectral interval, NW, and each Gauss point, NG.
127	! Calculate the continuum opacities, i.e., those that do not depend on
128	! NG, the Gauss index.
129
130	taugsurf(:,:) = 0.0
131	dpr(:) = 0.0
132	lkcoef(:,:) = 0.0
133
134	do K=2,L_LEVELS
135
136	ilay = k / 2 ! int. arithmetic => gives the gcm layer index
137
138	DPR(k) = PLEV(K)-PLEV(K-1)
139
140	! if we have continuum opacities, we need dz
141
142	dz(k) = dpr(k)RTMID(K)/(gzlat_ig(ilay)*PMID(K))
143	U(k) = Cmk(ilay)*DPR(k) ! only Cmk line in optcv.F
144
145	call tpindex(PMID(K),TMID(K),pfgasref,tgasref,LCOEF,MT(K),MP(K))
146
147	do LK=1,4
148	LKCOEF(K,LK) = LCOEF(LK)
149	end do
150	end do ! levels
151
152	! Rayleigh scattering
153	do NW=1,L_NSPECTV
154	do K=2,L_LEVELS
155	TRAY(K,NW) = TAURAY(NW) * DPR(K)
156	end do ! levels
157	end do
158
159	! we ignore K=1...
160	do K=2,L_LEVELS
161
162	ilay = k / 2 ! int. arithmetic => gives the gcm layer index
163
164	do NW=1,L_NSPECTV
165
166	! Optical coupling of YAMMS is plugged but inactivated (if false) for now
167	! as long as the microphysics only isn't fully debugged -- JVO 01/18
168	IF (callmufi .AND. (.NOT. uncoupl_optic_haze)) THEN
169	m0as = pqo(ilay,1)
170	m3as = pqo(ilay,2)
171	m0af = pqo(ilay,3)
172	m3af = pqo(ilay,4)
173
174	IF (.NOT.mmp_sph_optics_vis(m0as,m3as,nw,ext_s,sca_s,ssa_s,asf_s)) &
175	CALL abort_gcm("optcv", "Fatal error in mmp_sph_optics_vis", 12)
176	IF (.NOT.mmp_fra_optics_vis(m0af,m3af,nw,ext_f,sca_f,ssa_f,asf_f)) &
177	CALL abort_gcm("optcv", "Fatal error in mmp_fra_optics_vis", 12)
178	dhaze_T(k,nw) = ext_s+ext_f
179	SSA_T(k,nw) = (sca_s+sca_f)/dhaze_T(k,nw)
180	ASF_T(k,nw) = (asf_ssca_s + asf_fsca_f) /(sca_s+sca_f)
181	IF (callclouds.and.firstcall) &
182	WRITE(,) 'WARNING: In optcv, optical properties &
183	&calculations are not implemented yet'
184	ELSE
185	! Call fixed vertical haze profile of extinction - same for all columns
186	call disr_haze(dz(k),plev(k),wnov(nw),dhaze_T(k,nw),SSA_T(k,nw),ASF_T(k,nw))
187	if (seashaze) dhaze_T(k,nw) = dhaze_T(k,nw)*seashazefact(k)
188	ENDIF
189
190	DRAYAER = TRAY(K,NW)
191	! DRAYAER is Tau RAYleigh scattering, plus AERosol opacity
192	DRAYAER = DRAYAER + DHAZE_T(K,NW) ! Titan's aerosol
193
194	DCONT = 0.0 ! continuum absorption
195
196	if(continuum.and.(.not.graybody).and.callgasvis)then
197	! include continua if necessary
198	wn_cont = dble(wnov(nw))
199	T_cont = dble(TMID(k))
200	do igas=1,ngasmx
201
202	p_cont = dble(PMID(k)scalepgfrac(igas,ilay))
203
204	dtemp=0.0
205	if(igas.eq.igas_N2)then
206
207	interm = indv(nw,igas,igas)
208	! call interpolateN2N2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
209	indv(nw,igas,igas) = interm
210	! only goes to 500 cm^-1, so unless we're around a cold brown dwarf, this is irrelevant in the visible
211
212	elseif(igas.eq.igas_H2)then
213
214	! first do self-induced absorption
215	interm = indv(nw,igas,igas)
216	call interpolateH2H2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
217	indv(nw,igas,igas) = interm
218
219	! then cross-interactions with other gases
220	do jgas=1,ngasmx
221	p_cross = dble(PMID(k)scalepgfrac(jgas,ilay))
222	dtempc = 0.0
223	if(jgas.eq.igas_N2)then
224	interm = indv(nw,igas,jgas)
225	call interpolateN2H2(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
226	indv(nw,igas,jgas) = interm
227	! should be irrelevant in the visible
228	endif
229	dtemp = dtemp + dtempc
230	enddo
231
232	elseif(igas.eq.igas_CH4)then
233
234	! first do self-induced absorption
235	interm = indv(nw,igas,igas)
236	call interpolateCH4CH4(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
237	indv(nw,igas,igas) = interm
238
239	! then cross-interactions with other gases
240	do jgas=1,ngasmx
241	p_cross = dble(PMID(k)scalepgfrac(jgas,ilay))
242	dtempc = 0.0
243	if(jgas.eq.igas_N2)then
244	interm = indv(nw,igas,jgas)
245	call interpolateN2CH4(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
246	indv(nw,igas,jgas) = interm
247	endif
248	dtemp = dtemp + dtempc
249	enddo
250
251	endif
252
253	DCONT = DCONT + dtemp
254
255	enddo
256
257	DCONT = DCONT*dz(k)
258
259	endif
260
261	do ng=1,L_NGAUSS-1
262
263	! Now compute TAUGAS
264
265	! JVO 2017 : added tmpk because the repeated calls to gasi/v increased dramatically
266	! the execution time of optci/v -> ~ factor 2 on the whole radiative
267	! transfer on the tested simulations !
268
269	tmpk = GASV(MT(K):MT(K)+1,MP(K):MP(K)+1,1,NW,NG)
270
271	KCOEF(1) = tmpk(1,1) ! KCOEF(1) = GASV(MT(K),MP(K),1,NW,NG)
272	KCOEF(2) = tmpk(1,2) ! KCOEF(2) = GASV(MT(K),MP(K)+1,1,NW,NG)
273	KCOEF(3) = tmpk(2,2) ! KCOEF(3) = GASV(MT(K)+1,MP(K)+1,1,NW,NG)
274	KCOEF(4) = tmpk(2,1) ! KCOEF(4) = GASV(MT(K)+1,MP(K),1,NW,NG)
275
276	! Interpolate the gaseous k-coefficients to the requested T,P values
277
278	ANS = LKCOEF(K,1)KCOEF(1) + LKCOEF(K,2)KCOEF(2) + &
279	LKCOEF(K,3)KCOEF(3) + LKCOEF(K,4)KCOEF(4)
280
281
282	TAUGAS = U(k)*ANS
283
284	TAUGSURF(NW,NG) = TAUGSURF(NW,NG) + TAUGAS + DCONT
285	DTAUKV(K,nw,ng) = TAUGAS &
286	+ DRAYAER & ! DRAYAER includes all scattering contributions
287	+ DCONT ! For parameterized continuum aborption
288
289	end do
290
291	! Now fill in the "clear" part of the spectrum (NG = L_NGAUSS),
292	! which holds continuum opacity only
293
294	NG = L_NGAUSS
295	DTAUKV(K,nw,ng) = DRAYAER + DCONT ! Scattering + parameterized continuum absorption, including Titan's haze
296
297	end do
298	end do
299
300
301	!=======================================================================
302	! Now the full treatment for the layers, where besides the opacity
303	! we need to calculate the scattering albedo and asymmetry factors
304
305	! Haze scattering
306	DO NW=1,L_NSPECTV
307	DO K=2,L_LEVELS
308	DHAZES_T(K,NW) = DHAZE_T(K,NW) * SSA_T(K,NW) ! effect of scattering albedo on haze
309	ENDDO
310	ENDDO
311
312
313	DO NW=1,L_NSPECTV
314	DO L=1,L_NLAYRAD-1
315	K = 2*L+1
316	atemp(L,NW) = ASF_T(K,NW)DHAZES_T(K,NW) + ASF_T(K+1,NW)DHAZES_T(K+1,NW)
317	btemp(L,NW) = DHAZES_T(K,NW) + DHAZES_T(K+1,NW)
318	ctemp(L,NW) = btemp(L,NW) + 0.9999*(TRAY(K,NW) + TRAY(K+1,NW)) ! JVO 2017 : does this 0.999 is really meaningful ?
319	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW) + TRAY(K+1,NW)
320	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
321	END DO ! L vertical loop
322
323	! Last level
324	L = L_NLAYRAD
325	K = 2*L+1
326	atemp(L,NW) = ASF_T(K,NW)*DHAZES_T(K,NW)
327	btemp(L,NW) = DHAZES_T(K,NW)
328	ctemp(L,NW) = btemp(L,NW) + 0.9999*TRAY(K,NW) ! JVO 2017 : does this 0.999 is really meaningful ?
329	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW)
330	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
331
332
333	END DO ! NW spectral loop
334
335	DO NG=1,L_NGAUSS
336	DO NW=1,L_NSPECTV
337	DO L=1,L_NLAYRAD-1
338
339	K = 2*L+1
340	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG) + DTAUKV(K+1,NW,NG)
341	WBARV(L,nw,ng) = ctemp(L,NW) / DTAUV(L,nw,ng)
342
343	END DO ! L vertical loop
344
345	! Last level
346
347	L = L_NLAYRAD
348	K = 2*L+1
349	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG)
350
351	WBARV(L,NW,NG) = ctemp(L,NW) / DTAUV(L,NW,NG)
352
353	END DO ! NW spectral loop
354	END DO ! NG Gauss loop
355
356	! Total extinction optical depths
357
358	DO NG=1,L_NGAUSS ! full gauss loop
359	DO NW=1,L_NSPECTV
360	TAUV(1,NW,NG)=0.0D0
361	DO L=1,L_NLAYRAD
362	TAUV(L+1,NW,NG)=TAUV(L,NW,NG)+DTAUV(L,NW,NG)
363	END DO
364
365	TAUCUMV(1,NW,NG)=0.0D0
366	DO K=2,L_LEVELS
367	TAUCUMV(K,NW,NG)=TAUCUMV(K-1,NW,NG)+DTAUKV(K,NW,NG)
368	END DO
369	END DO
370	END DO ! end full gauss loop
371
372
373	! Titan's outputs (JVO, 2016)===============================================
374	! do l=1,L_NLAYRAD
375	! do nw=1,L_NSPECTV
376	! INT_DTAU(L,NW) = 0.0d+0
377	! DO NG=1,L_NGAUSS
378	! INT_DTAU(L,NW)= INT_DTAU(L,NW) + dtauv(L,nw,ng)*gweight(NG)
379	! enddo
380	! enddo
381	! enddo
382
383	! do nw=1,L_NSPECTV
384	! write(str2,'(i2.2)') nw
385	! 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))
386	! 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))
387	! enddo
388
389	! ==============================================================================
390
391	if(firstcall) firstcall = .false.
392
393	return
394
395
396	end subroutine optcv

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