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optcv.F90 @ 2131

Last change on this file since 2131 was 2131, checked in by jvatant, 6 years ago

+ Add diagnostics of optical thickness, in 1D, if 'diagdtau' key is activated, it

outputs dtaui/v(altitude) in diagfi.nc for every narrowband (could be done with one var
but would require to be able to have writediag in 5D

--JVO

Property svn:executable set to *

File size: 14.2 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,gweight
7	use gases_h
8	use comcstfi_mod, only: r
9	use callkeys_mod, only: continuum,graybody,callgasvis,corrk_recombin,diagdtau, &
10	callclouds,callmufi,seashaze,uncoupl_optic_haze
11	use tracer_h, only: nmicro,nice
12	use MMP_OPTICS
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	real*8 INT_DTAU(L_NLAYRAD,L_NSPECTI)
71
72	CHARACTER*2 str2
73	! ==========================
74
75	integer L, NW, NG, K, LK, IAER
76	integer MT(L_LEVELS), MP(L_LEVELS), NP(L_LEVELS)
77	real*8 ANS, TAUGAS
78	real*8 TRAY(L_LEVELS,L_NSPECTV)
79	real*8 DPR(L_LEVELS), U(L_LEVELS)
80	real*8 LCOEF(4), LKCOEF(L_LEVELS,4)
81
82	real*8 DCONT
83	real*8 DRAYAER
84	double precision wn_cont, p_cont, p_air, T_cont, dtemp, dtempc
85	double precision p_cross
86
87	real*8 KCOEF(4)
88
89	! temporary variable to reduce memory access time to gasv
90	real*8 tmpk(2,2)
91
92	! temporary variables for multiple aerosol calculation
93	real*8 atemp(L_NLAYRAD,L_NSPECTV)
94	real*8 btemp(L_NLAYRAD,L_NSPECTV)
95	real*8 ctemp(L_NLAYRAD,L_NSPECTV)
96
97	! variables for k in units m^-1
98	real*8 dz(L_LEVELS)
99
100	integer igas, jgas, ilay
101
102	integer interm
103
104	real*8 m0as,m3as,m0af,m3af
105	real*8 ext_s,sca_s,ssa_s,asf_s
106	real*8 ext_f,sca_f,ssa_f,asf_f
107	logical,save :: firstcall=.true.
108	!$OMP THREADPRIVATE(firstcall)
109
110
111	!! AS: to save time in computing continuum (see bilinearbig)
112	IF (.not.ALLOCATED(indv)) THEN
113	ALLOCATE(indv(L_NSPECTV,ngasmx,ngasmx))
114	indv = -9999 ! this initial value means "to be calculated"
115	ENDIF
116
117	! Some initialisation beacause there's a pb with disr_haze at the limits (nw=1)
118	! I should check this - For now we set vars to zero : better than nans - JVO 2017
119
120	dhaze_t(:,:) = 0.
121	ssa_t(:,:) = 0.
122	asf_t(:,:) = 0.
123
124
125	!=======================================================================
126	! Determine the total gas opacity throughout the column, for each
127	! spectral interval, NW, and each Gauss point, NG.
128	! Calculate the continuum opacities, i.e., those that do not depend on
129	! NG, the Gauss index.
130
131	taugsurf(:,:) = 0.0
132	dpr(:) = 0.0
133	lkcoef(:,:) = 0.0
134
135	do K=2,L_LEVELS
136
137	ilay = k / 2 ! int. arithmetic => gives the gcm layer index
138
139	DPR(k) = PLEV(K)-PLEV(K-1)
140
141	! if we have continuum opacities, we need dz
142
143	dz(k) = dpr(k)RTMID(K)/(gzlat_ig(ilay)*PMID(K))
144	U(k) = Cmk(ilay)*DPR(k) ! only Cmk line in optcv.F
145
146	call tpindex(PMID(K),TMID(K),pfgasref,tgasref,LCOEF,MT(K),MP(K))
147
148	do LK=1,4
149	LKCOEF(K,LK) = LCOEF(LK)
150	end do
151	end do ! levels
152
153	! Rayleigh scattering
154	do NW=1,L_NSPECTV
155	TRAY(1:4,NW) = 1d-30
156	do K=5,L_LEVELS
157	TRAY(K,NW) = TAURAY(NW) * DPR(K)
158	end do ! levels
159	end do
160
161	! we ignore K=1...
162	do K=2,L_LEVELS
163
164	ilay = k / 2 ! int. arithmetic => gives the gcm layer index
165
166	do NW=1,L_NSPECTV
167
168	! Optical coupling of YAMMS is plugged but inactivated (if false) for now
169	! as long as the microphysics only isn't fully debugged -- JVO 01/18
170	IF (callmufi .AND. (.NOT. uncoupl_optic_haze)) THEN
171	m0as = pqmo(ilay,1)
172	m3as = pqmo(ilay,2)
173	m0af = pqmo(ilay,3)
174	m3af = pqmo(ilay,4)
175
176	IF (.NOT.mmp_sph_optics_vis(m0as,m3as,nw,ext_s,sca_s,ssa_s,asf_s)) &
177	CALL abort_gcm("optcv", "Fatal error in mmp_sph_optics_vis", 12)
178	IF (.NOT.mmp_fra_optics_vis(m0af,m3af,nw,ext_f,sca_f,ssa_f,asf_f)) &
179	CALL abort_gcm("optcv", "Fatal error in mmp_fra_optics_vis", 12)
180	dhaze_T(k,nw) = ext_s+ext_f
181	SSA_T(k,nw) = (sca_s+sca_f)/dhaze_T(k,nw)
182	ASF_T(k,nw) = (asf_ssca_s + asf_fsca_f) /(sca_s+sca_f)
183	IF (callclouds.and.firstcall) &
184	WRITE(,) 'WARNING: In optcv, optical properties &
185	&calculations are not implemented yet'
186	ELSE
187	! Call fixed vertical haze profile of extinction - same for all columns
188	call disr_haze(dz(k),plev(k),wnov(nw),dhaze_T(k,nw),SSA_T(k,nw),ASF_T(k,nw))
189	if (seashaze) dhaze_T(k,nw) = dhaze_T(k,nw)*seashazefact(k)
190	ENDIF
191
192	!JL18 It seems to be good to have aerosols in the first "radiative layer" of the gcm in the IR
193	! but visible does not handle very well diffusion in first layer.
194	! The tauaero and tauray are thus set to 0 (a small value for rayleigh because the code crashes otherwise)
195	! in the 4 first semilayers in optcv, but not optci.
196	! This solves random variations of the sw heating at the model top.
197	if (k<5) dhaze_T(K,:) = 0.0
198
199	DRAYAER = TRAY(K,NW)
200	! DRAYAER is Tau RAYleigh scattering, plus AERosol opacity
201	DRAYAER = DRAYAER + DHAZE_T(K,NW) ! Titan's aerosol
202
203	DCONT = 0.0 ! continuum absorption
204
205	if(continuum.and.(.not.graybody).and.callgasvis)then
206	! include continua if necessary
207	wn_cont = dble(wnov(nw))
208	T_cont = dble(TMID(k))
209	do igas=1,ngasmx
210
211	p_cont = dble(PMID(k)scalepgfrac(igas,ilay))
212
213	dtemp=0.0
214	if(igas.eq.igas_N2)then
215
216	interm = indv(nw,igas,igas)
217	! call interpolateN2N2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
218	indv(nw,igas,igas) = interm
219	! only goes to 500 cm^-1, so unless we're around a cold brown dwarf, this is irrelevant in the visible
220
221	elseif(igas.eq.igas_H2)then
222
223	! first do self-induced absorption
224	interm = indv(nw,igas,igas)
225	call interpolateH2H2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
226	indv(nw,igas,igas) = interm
227
228	! then cross-interactions with other gases
229	do jgas=1,ngasmx
230	p_cross = dble(PMID(k)scalepgfrac(jgas,ilay))
231	dtempc = 0.0
232	if(jgas.eq.igas_N2)then
233	interm = indv(nw,igas,jgas)
234	call interpolateN2H2(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
235	indv(nw,igas,jgas) = interm
236	! should be irrelevant in the visible
237	endif
238	dtemp = dtemp + dtempc
239	enddo
240
241	elseif(igas.eq.igas_CH4)then
242
243	! first do self-induced absorption
244	interm = indv(nw,igas,igas)
245	call interpolateCH4CH4(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
246	indv(nw,igas,igas) = interm
247
248	! then cross-interactions with other gases
249	do jgas=1,ngasmx
250	p_cross = dble(PMID(k)scalepgfrac(jgas,ilay))
251	dtempc = 0.0
252	if(jgas.eq.igas_N2)then
253	interm = indv(nw,igas,jgas)
254	call interpolateN2CH4(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
255	indv(nw,igas,jgas) = interm
256	endif
257	dtemp = dtemp + dtempc
258	enddo
259
260	endif
261
262	DCONT = DCONT + dtemp
263
264	enddo
265
266	DCONT = DCONT*dz(k)
267
268	endif
269
270	do ng=1,L_NGAUSS-1
271
272	! Now compute TAUGAS
273
274	! JVO 2017 : added tmpk because the repeated calls to gasi/v increased dramatically
275	! the execution time of optci/v -> ~ factor 2 on the whole radiative
276	! transfer on the tested simulations !
277
278	if (corrk_recombin) then
279	tmpk = GASV_RECOMB(MT(K):MT(K)+1,MP(K):MP(K)+1,NW,NG)
280	else
281	tmpk = GASV(MT(K):MT(K)+1,MP(K):MP(K)+1,1,NW,NG)
282	endif
283
284	KCOEF(1) = tmpk(1,1) ! KCOEF(1) = GASV(MT(K),MP(K),1,NW,NG)
285	KCOEF(2) = tmpk(1,2) ! KCOEF(2) = GASV(MT(K),MP(K)+1,1,NW,NG)
286	KCOEF(3) = tmpk(2,2) ! KCOEF(3) = GASV(MT(K)+1,MP(K)+1,1,NW,NG)
287	KCOEF(4) = tmpk(2,1) ! KCOEF(4) = GASV(MT(K)+1,MP(K),1,NW,NG)
288
289	! Interpolate the gaseous k-coefficients to the requested T,P values
290
291	ANS = LKCOEF(K,1)KCOEF(1) + LKCOEF(K,2)KCOEF(2) + &
292	LKCOEF(K,3)KCOEF(3) + LKCOEF(K,4)KCOEF(4)
293
294
295	TAUGAS = U(k)*ANS
296
297	TAUGSURF(NW,NG) = TAUGSURF(NW,NG) + TAUGAS + DCONT
298	DTAUKV(K,nw,ng) = TAUGAS &
299	+ DRAYAER & ! DRAYAER includes all scattering contributions
300	+ DCONT ! For parameterized continuum aborption
301
302	end do
303
304	! Now fill in the "clear" part of the spectrum (NG = L_NGAUSS),
305	! which holds continuum opacity only
306
307	NG = L_NGAUSS
308	DTAUKV(K,nw,ng) = DRAYAER + DCONT ! Scattering + parameterized continuum absorption, including Titan's haze
309
310	end do
311	end do
312
313
314	!=======================================================================
315	! Now the full treatment for the layers, where besides the opacity
316	! we need to calculate the scattering albedo and asymmetry factors
317	! ======================================================================
318
319	! Haze scattering
320	!JL18 It seems to be good to have aerosols in the first "radiative layer" of the gcm in the IR
321	! but not in the visible
322	! The dhaze_s is thus set to 0 in the 4 first semilayers in optcv, but not optci.
323	! This solves random variations of the sw heating at the model top.
324	DO NW=1,L_NSPECTV
325	DHAZES_T(1:4,NW) = 0.d0
326	DO K=5,L_LEVELS
327	DHAZES_T(K,NW) = DHAZE_T(K,NW) * SSA_T(K,NW) ! effect of scattering albedo on haze
328	ENDDO
329	ENDDO
330
331
332	DO NW=1,L_NSPECTV
333	DO L=1,L_NLAYRAD-1
334	K = 2*L+1
335	atemp(L,NW) = ASF_T(K,NW)DHAZES_T(K,NW) + ASF_T(K+1,NW)DHAZES_T(K+1,NW)
336	btemp(L,NW) = DHAZES_T(K,NW) + DHAZES_T(K+1,NW)
337	ctemp(L,NW) = btemp(L,NW) + 0.9999*(TRAY(K,NW) + TRAY(K+1,NW)) ! JVO 2017 : does this 0.999 is really meaningful ?
338	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW) + TRAY(K+1,NW)
339	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
340	END DO ! L vertical loop
341
342	! Last level
343	L = L_NLAYRAD
344	K = 2*L+1
345	atemp(L,NW) = ASF_T(K,NW)*DHAZES_T(K,NW)
346	btemp(L,NW) = DHAZES_T(K,NW)
347	ctemp(L,NW) = btemp(L,NW) + 0.9999*TRAY(K,NW) ! JVO 2017 : does this 0.999 is really meaningful ?
348	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW)
349	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
350
351
352	END DO ! NW spectral loop
353
354	DO NG=1,L_NGAUSS
355	DO NW=1,L_NSPECTV
356	DO L=1,L_NLAYRAD-1
357
358	K = 2*L+1
359	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG) + DTAUKV(K+1,NW,NG)
360	WBARV(L,nw,ng) = ctemp(L,NW) / DTAUV(L,nw,ng)
361
362	END DO ! L vertical loop
363
364	! Last level
365
366	L = L_NLAYRAD
367	K = 2*L+1
368	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG)
369
370	WBARV(L,NW,NG) = ctemp(L,NW) / DTAUV(L,NW,NG)
371
372	END DO ! NW spectral loop
373	END DO ! NG Gauss loop
374
375	! Total extinction optical depths
376
377	DO NG=1,L_NGAUSS ! full gauss loop
378	DO NW=1,L_NSPECTV
379	TAUCUMV(1,NW,NG)=0.0D0
380	DO K=2,L_LEVELS
381	TAUCUMV(K,NW,NG)=TAUCUMV(K-1,NW,NG)+DTAUKV(K,NW,NG)
382	END DO
383
384	DO L=1,L_NLAYRAD
385	TAUV(L,NW,NG)=TAUCUMV(2*L,NW,NG)
386	END DO
387	TAUV(L,NW,NG)=TAUCUMV(2*L_NLAYRAD+1,NW,NG)
388	END DO
389	END DO ! end full gauss loop
390
391
392	! Optical thickness for 1D diagnostics (added by JVO)
393	if (diagdtau) then ! diagtau can be true only if 1D
394	do l=1,L_NLAYRAD
395	do nw=1,L_NSPECTV
396	INT_DTAU(L,NW) = 0.0d+0
397	DO NG=1,L_NGAUSS
398	INT_DTAU(L,NW)= INT_DTAU(L,NW) + dtauv(L,nw,ng)*gweight(NG)
399	enddo
400	enddo
401	enddo
402	do nw=1,L_NSPECTV
403	write(str2,'(i2.2)') nw
404	call writediagfi(1,'dtauv'//str2,'Layer optical thickness in VI band '//str2,'',1,int_dtau(L_NLAYRAD:1:-1,nw))
405	enddo
406	endif
407
408
409	if(firstcall) firstcall = .false.
410
411	return
412
413
414	end subroutine optcv

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