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optcv.F90 @ 1351

Last change on this file since 1351 was 1194, checked in by sglmd, 11 years ago
Latitude-dependent gravity field added. Option oblate = .true. in callphys.def, and three additional variables needed: J2, Rmean and MassPlanet?.
Property svn:executable set to ``*
File size: 11.7 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
9	implicit none
10
11	!==================================================================
12	!
13	! Purpose
14	! -------
15	! Calculates shortwave optical constants at each level.
16	!
17	! Authors
18	! -------
19	! Adapted from the NASA Ames code by R. Wordsworth (2009)
20	!
21	!==================================================================
22	!
23	! THIS SUBROUTINE SETS THE OPTICAL CONSTANTS IN THE VISUAL
24	! IT CALCUALTES FOR EACH LAYER, FOR EACH SPECRAL INTERVAL IN THE VISUAL
25	! LAYER: WBAR, DTAU, COSBAR
26	! LEVEL: TAU
27	!
28	! TAUV(L,NW,NG) is the cumulative optical depth at the top of radiation code
29	! layer L. NW is spectral wavelength interval, ng the Gauss point index.
30	!
31	! TLEV(L) - Temperature at the layer boundary
32	! PLEV(L) - Pressure at the layer boundary (i.e. level)
33	! GASV(NT,NPS,NW,NG) - Visible k-coefficients
34	!
35	!-------------------------------------------------------------------
36
37	#include "comcstfi.h"
38	#include "callkeys.h"
39
40
41	real*8 DTAUV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
42	real*8 DTAUKV(L_LEVELS+1,L_NSPECTV,L_NGAUSS)
43	real*8 TAUV(L_NLEVRAD,L_NSPECTV,L_NGAUSS)
44	real*8 TAUCUMV(L_LEVELS,L_NSPECTV,L_NGAUSS)
45	real*8 PLEV(L_LEVELS)
46	real*8 TMID(L_LEVELS), PMID(L_LEVELS)
47	real*8 COSBV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
48	real*8 WBARV(L_NLAYRAD,L_NSPECTV,L_NGAUSS)
49
50	! for aerosols
51	real*8 QXVAER(L_LEVELS+1,L_NSPECTV,NAERKIND)
52	real*8 QSVAER(L_LEVELS+1,L_NSPECTV,NAERKIND)
53	real*8 GVAER(L_LEVELS+1,L_NSPECTV,NAERKIND)
54	real*8 TAUAERO(L_LEVELS+1,NAERKIND)
55	real*8 TAUAEROLK(L_LEVELS+1,L_NSPECTV,NAERKIND)
56	real*8 TAEROS(L_LEVELS,L_NSPECTV,NAERKIND)
57
58	integer L, NW, NG, K, LK, IAER
59	integer MT(L_LEVELS), MP(L_LEVELS), NP(L_LEVELS)
60	real*8 ANS, TAUGAS
61	real*8 TAURAY(L_NSPECTV)
62	real*8 TRAY(L_LEVELS,L_NSPECTV)
63	real*8 TRAYAER
64	real*8 DPR(L_LEVELS), U(L_LEVELS)
65	real*8 LCOEF(4), LKCOEF(L_LEVELS,4)
66
67	real*8 taugsurf(L_NSPECTV,L_NGAUSS-1)
68	real*8 DCONT,DAERO
69	double precision wn_cont, p_cont, p_air, T_cont, dtemp, dtempc
70	double precision p_cross
71
72	! variable species mixing ratio variables
73	real*8 QVAR(L_LEVELS), WRATIO(L_LEVELS), MUVAR(L_LEVELS)
74	real*8 KCOEF(4)
75	integer NVAR(L_LEVELS)
76
77	! temporary variables for multiple aerosol calculation
78	real*8 atemp(L_NLAYRAD,L_NSPECTV)
79	real*8 btemp(L_NLAYRAD,L_NSPECTV)
80	real*8 ctemp(L_NLAYRAD,L_NSPECTV)
81
82	! variables for k in units m^-1
83	real*8 dz(L_LEVELS)
84
85	integer igas, jgas
86
87	integer interm
88
89	!! AS: to save time in computing continuum (see bilinearbig)
90	IF (.not.ALLOCATED(indv)) THEN
91	ALLOCATE(indv(L_NSPECTV,ngasmx,ngasmx))
92	indv = -9999 ! this initial value means "to be calculated"
93	ENDIF
94
95	!=======================================================================
96	! Determine the total gas opacity throughout the column, for each
97	! spectral interval, NW, and each Gauss point, NG.
98	! Calculate the continuum opacities, i.e., those that do not depend on
99	! NG, the Gauss index.
100
101	taugsurf(:,:) = 0.0
102	dpr(:) = 0.0
103	lkcoef(:,:) = 0.0
104
105	do K=2,L_LEVELS
106	DPR(k) = PLEV(K)-PLEV(K-1)
107
108	! if we have continuum opacities, we need dz
109	if(kastprof)then
110	dz(k) = dpr(k)(1000.0d08.3145d0/muvar(k))TMID(K)/(gPMID(K))
111	U(k) = CmkDPR(k)mugaz/muvar(k)
112	else
113	dz(k) = dpr(k)RTMID(K)/(glat_igPMID(K))mugaz/muvar(k)
114	U(k) = CmkDPR(k)mugaz/muvar(k) ! only Cmk line in optci.F
115	!JL13 the mugaz/muvar factor takes into account water meanmolecular weight if water is present
116	endif
117
118	call tpindex(PMID(K),TMID(K),QVAR(K),pfgasref,tgasref,WREFVAR, &
119	LCOEF,MT(K),MP(K),NVAR(K),WRATIO(K))
120
121	do LK=1,4
122	LKCOEF(K,LK) = LCOEF(LK)
123	end do
124	end do ! levels
125
126
127	do iaer=1,naerkind
128	do NW=1,L_NSPECTV
129	do K=2,L_LEVELS
130	TAEROS(K,NW,IAER) = TAUAERO(K,IAER) * QXVAER(K,NW,IAER)
131	end do ! levels
132	end do
133	end do
134	do NW=1,L_NSPECTV
135	do K=2,L_LEVELS
136	TRAY(K,NW) = TAURAY(NW) * DPR(K)
137	end do ! levels
138	end do
139
140	! we ignore K=1...
141	do K=2,L_LEVELS
142
143	do NW=1,L_NSPECTV
144
145	TRAYAER = TRAY(K,NW)
146	! TRAYAER is Tau RAYleigh scattering, plus AERosol opacity
147	do iaer=1,naerkind
148	TRAYAER = TRAYAER + TAEROS(K,NW,IAER)
149	end do
150
151	DCONT = 0.0 ! continuum absorption
152
153	if(continuum.and.(.not.graybody).and.callgasvis)then
154	! include continua if necessary
155	wn_cont = dble(wnov(nw))
156	T_cont = dble(TMID(k))
157	do igas=1,ngasmx
158
159	if(gfrac(igas).eq.-1)then ! variable
160	p_cont = dble(PMID(k)scalepQVAR(k)) ! qvar = mol/mol
161	else
162	p_cont = dble(PMID(k)scalepgfrac(igas)*(1.-QVAR(k)))
163	endif
164
165	dtemp=0.0
166	if(igas.eq.igas_N2)then
167
168	interm = indv(nw,igas,igas)
169	! call interpolateN2N2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
170	indv(nw,igas,igas) = interm
171	! only goes to 500 cm^-1, so unless we're around a cold brown dwarf, this is irrelevant in the visible
172
173	elseif(igas.eq.igas_H2)then
174
175	! first do self-induced absorption
176	interm = indv(nw,igas,igas)
177	call interpolateH2H2(wn_cont,T_cont,p_cont,dtemp,.false.,interm)
178	indv(nw,igas,igas) = interm
179
180	! then cross-interactions with other gases
181	do jgas=1,ngasmx
182	p_cross = dble(PMID(k)scalepgfrac(jgas)*(1.-QVAR(k)))
183	dtempc = 0.0
184	if(jgas.eq.igas_N2)then
185	interm = indv(nw,igas,jgas)
186	call interpolateN2H2(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
187	indv(nw,igas,jgas) = interm
188	! should be irrelevant in the visible
189	elseif(jgas.eq.igas_He)then
190	interm = indv(nw,igas,jgas)
191	call interpolateH2He(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm)
192	indv(nw,igas,jgas) = interm
193	endif
194	dtemp = dtemp + dtempc
195	enddo
196
197	elseif(igas.eq.igas_H2O.and.T_cont.gt.200.0)then
198
199	p_air = dble(PMID(k)*scalep) - p_cont ! note assumes background is air!
200	if(H2Ocont_simple)then
201	call interpolateH2Ocont_PPC(wn_cont,T_cont,p_cont,p_air,dtemp,.false.)
202	else
203	interm = indv(nw,igas,igas)
204	call interpolateH2Ocont_CKD(wn_cont,T_cont,p_cont,p_air,dtemp,.false.,interm)
205	indv(nw,igas,igas) = interm
206	endif
207
208	endif
209
210	DCONT = DCONT + dtemp
211
212	enddo
213
214	DCONT = DCONT*dz(k)
215
216	endif
217
218	do ng=1,L_NGAUSS-1
219
220	! Now compute TAUGAS
221
222	! Interpolate between water mixing ratios
223	! WRATIO = 0.0 if the requested water amount is equal to, or outside the
224	! the water data range
225
226	if(L_REFVAR.eq.1)then ! added by RW for special no variable case
227	KCOEF(1) = GASV(MT(K),MP(K),1,NW,NG)
228	KCOEF(2) = GASV(MT(K),MP(K)+1,1,NW,NG)
229	KCOEF(3) = GASV(MT(K)+1,MP(K)+1,1,NW,NG)
230	KCOEF(4) = GASV(MT(K)+1,MP(K),1,NW,NG)
231	else
232
233	KCOEF(1) = GASV(MT(K),MP(K),NVAR(K),NW,NG) + WRATIO(K)* &
234	(GASV(MT(K),MP(K),NVAR(K)+1,NW,NG) - &
235	GASV(MT(K),MP(K),NVAR(K),NW,NG))
236
237	KCOEF(2) = GASV(MT(K),MP(K)+1,NVAR(K),NW,NG) + WRATIO(K)* &
238	(GASV(MT(K),MP(K)+1,NVAR(K)+1,NW,NG) - &
239	GASV(MT(K),MP(K)+1,NVAR(K),NW,NG))
240
241	KCOEF(3) = GASV(MT(K)+1,MP(K)+1,NVAR(K),NW,NG) + WRATIO(K)*&
242	(GASV(MT(K)+1,MP(K)+1,NVAR(K)+1,NW,NG) - &
243	GASV(MT(K)+1,MP(K)+1,NVAR(K),NW,NG))
244
245	KCOEF(4) = GASV(MT(K)+1,MP(K),NVAR(K),NW,NG) + WRATIO(K)* &
246	(GASV(MT(K)+1,MP(K),NVAR(K)+1,NW,NG) - &
247	GASV(MT(K)+1,MP(K),NVAR(K),NW,NG))
248
249	endif
250
251	! Interpolate the gaseous k-coefficients to the requested T,P values
252
253	ANS = LKCOEF(K,1)KCOEF(1) + LKCOEF(K,2)KCOEF(2) + &
254	LKCOEF(K,3)KCOEF(3) + LKCOEF(K,4)KCOEF(4)
255
256	TAUGAS = U(k)*ANS
257
258	TAUGSURF(NW,NG) = TAUGSURF(NW,NG) + TAUGAS + DCONT
259	DTAUKV(K,nw,ng) = TAUGAS &
260	+ TRAYAER & ! TRAYAER includes all scattering contributions
261	+ DCONT ! For parameterized continuum aborption
262
263	end do
264
265	! Now fill in the "clear" part of the spectrum (NG = L_NGAUSS),
266	! which holds continuum opacity only
267
268	NG = L_NGAUSS
269	DTAUKV(K,nw,ng) = TRAY(K,NW) + DCONT ! For parameterized continuum absorption
270
271	do iaer=1,naerkind
272	DTAUKV(K,nw,ng) = DTAUKV(K,nw,ng) + TAEROS(K,NW,IAER)
273	end do ! a bug was here!
274
275	end do
276	end do
277
278
279	!=======================================================================
280	! Now the full treatment for the layers, where besides the opacity
281	! we need to calculate the scattering albedo and asymmetry factors
282
283	do iaer=1,naerkind
284	DO NW=1,L_NSPECTV
285	DO K=2,L_LEVELS ! AS: shouldn't this be L_LEVELS+1 ? (see optci)
286	TAUAEROLK(K,NW,IAER) = TAUAERO(K,IAER) * QSVAER(K,NW,IAER)
287	ENDDO
288	ENDDO
289	end do
290
291	DO NW=1,L_NSPECTV
292	DO L=1,L_NLAYRAD-1
293	K = 2*L+1
294	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))
295	btemp(L,NW) = SUM(TAUAEROLK(K,NW,1:naerkind)) + SUM(TAUAEROLK(K+1,NW,1:naerkind))
296	ctemp(L,NW) = btemp(L,NW) + 0.9999*(TRAY(K,NW) + TRAY(K+1,NW))
297	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW) + TRAY(K+1,NW)
298	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
299	END DO ! L vertical loop
300
301	!last level
302	L = L_NLAYRAD
303	K = 2*L+1
304	atemp(L,NW) = SUM(GVAER(K,NW,1:naerkind) * TAUAEROLK(K,NW,1:naerkind))
305	btemp(L,NW) = SUM(TAUAEROLK(K,NW,1:naerkind))
306	ctemp(L,NW) = btemp(L,NW) + 0.9999*TRAY(K,NW)
307	btemp(L,NW) = btemp(L,NW) + TRAY(K,NW)
308	COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW)
309
310
311	END DO ! NW spectral loop
312
313	DO NG=1,L_NGAUSS
314	DO NW=1,L_NSPECTV
315	DO L=1,L_NLAYRAD-1
316
317	K = 2*L+1
318	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG) + DTAUKV(K+1,NW,NG)
319	WBARV(L,nw,ng) = ctemp(L,NW) / DTAUV(L,nw,ng)
320
321	END DO ! L vertical loop
322
323	! No vertical averaging on bottom layer
324
325	L = L_NLAYRAD
326	K = 2*L+1
327	DTAUV(L,nw,ng) = DTAUKV(K,NW,NG)
328
329	WBARV(L,NW,NG) = ctemp(L,NW) / DTAUV(L,NW,NG)
330	END DO ! NW spectral loop
331	END DO ! NG Gauss loop
332
333	! Total extinction optical depths
334
335	DO NG=1,L_NGAUSS ! full gauss loop
336	DO NW=1,L_NSPECTV
337	TAUV(1,NW,NG)=0.0D0
338	DO L=1,L_NLAYRAD
339	TAUV(L+1,NW,NG)=TAUV(L,NW,NG)+DTAUV(L,NW,NG)
340	END DO
341
342	TAUCUMV(1,NW,NG)=0.0D0
343	DO K=2,L_LEVELS
344	TAUCUMV(K,NW,NG)=TAUCUMV(K-1,NW,NG)+DTAUKV(K,NW,NG)
345	END DO
346	END DO
347	END DO ! end full gauss loop
348
349
350	return
351
352
353	end subroutine optcv

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