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optci.F90 @ 278

Last change on this file since 278 was 253, checked in by emillour, 14 years ago

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Massive update to version 0.7

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1	subroutine optci(PLEV,TLEV,DTAUI,TAUCUMI, &
2	QXIAER,QSIAER,GIAER,COSBI,WBARI,TAUAERO, &
3	TMID,PMID,TAUGSURF,QVAR)
4
5	use radinc_h
6	use radcommon_h, only: gasi, tlimit, wrefVAR, Cmk,tgasref,pfgasref,wnoi,scalep
7	implicit none
8
9	!==================================================================
10	!
11	! Purpose
12	! -------
13	! Calculates longwave optical constants at each level. For each
14	! layer and spectral interval in the IR it calculates WBAR, DTAU
15	! and COSBAR. For each level it calculates TAU.
16	!
17	! TAUI(L,LW) is the cumulative optical depth at level L (or alternatively
18	! at the bottom of layer L), LW is the spectral wavelength interval.
19	!
20	! TLEV(L) - Temperature at the layer boundary (i.e., level)
21	! PLEV(L) - Pressure at the layer boundary (i.e., level)
22	!
23	! Authors
24	! -------
25	! Adapted from the NASA Ames code by R. Wordsworth (2009)
26	!
27	!==================================================================
28
29
30	#include "comcstfi.h"
31	#include "callkeys.h"
32	#include "gases.h"
33
34
35	real*8 DTAUI(L_NLAYRAD,L_NSPECTI,L_NGAUSS)
36	real*8 DTAUKI(L_LEVELS+1,L_NSPECTI,L_NGAUSS)
37	real*8 TAUI(L_NLEVRAD,L_NSPECTI,L_NGAUSS)
38	real*8 TAUCUMI(L_LEVELS,L_NSPECTI,L_NGAUSS)
39	real*8 PLEV(L_LEVELS)
40	real*8 TLEV(L_LEVELS)
41	real*8 TMID(L_LEVELS), PMID(L_LEVELS)
42	real*8 COSBI(L_NLAYRAD,L_NSPECTI,L_NGAUSS)
43	real*8 WBARI(L_NLAYRAD,L_NSPECTI,L_NGAUSS)
44
45	! For aerosols
46	real*8 QXIAER(L_LEVELS+1,L_NSPECTI,NAERKIND)
47	real*8 QSIAER(L_LEVELS+1,L_NSPECTI,NAERKIND)
48	real*8 GIAER(L_LEVELS+1,L_NSPECTI,NAERKIND)
49	real*8 TAUAERO(L_LEVELS+1,NAERKIND)
50	real*8 TAUAEROLK(L_LEVELS+1,L_NSPECTI,NAERKIND)
51	real*8 TAEROS(L_LEVELS,L_NSPECTI,NAERKIND)
52
53	integer L, NW, NG, K, LK, IAER
54	integer MT(L_LEVELS), MP(L_LEVELS), NP(L_LEVELS)
55	real*8 ANS, TAUGAS
56	real*8 DPR(L_LEVELS), U(L_LEVELS)
57	real*8 LCOEF(4), LKCOEF(L_LEVELS,4)
58
59	real*8 taugsurf(L_NSPECTI,L_NGAUSS-1)
60	real*8 DCONT
61	double precision wn_cont, p_cont, T_cont
62
63	! Water mixing ratio variables
64	real*8 QVAR(L_LEVELS), WRATIO(L_LEVELS)
65	real*8 KCOEF(4)
66	integer NVAR(L_LEVELS)
67
68	! temporary variables for multiple aerosol calculation
69	real*8 atemp, btemp
70
71	! variables for k in units m^-1
72	real*8 rho, dz(L_LEVELS)
73
74	integer igas
75
76	!--- Kasting's CIA ----------------------------------------
77	!real*8, parameter :: Ci(L_NSPECTI)=[ &
78	! 3.8E-5, 1.2E-5, 2.8E-6, 7.6E-7, 4.5E-7, 2.3E-7, &
79	! 5.4E-7, 1.6E-6, 0.0, &
80	! 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, &
81	! 0.0, 4.0E-7, 4.0E-6, 1.4E-5, &
82	! 1.0E-5, 1.2E-6, 2.0E-7, 5.0E-8, 3.0E-8, 0.0 ]
83	!real*8, parameter :: Ti(L_NSPECTI)=[ -2.2, -1.9, &
84	! -1.7, -1.7, -1.7, -1.7, -1.7, -1.7, &
85	! 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, &
86	! -1.7,-1.7,-1.7,-1.7,-1.7,-1.7,-1.7, -1.7,0.0 ]
87	!----------------------------------------------------------
88
89	!=======================================================================
90	! Determine the total gas opacity throughout the column, for each
91	! spectral interval, NW, and each Gauss point, NG.
92
93	taugsurf(:,:) = 0.0
94	dpr(:) = 0.0
95	lkcoef(:,:) = 0.0
96
97	do K=2,L_LEVELS
98	DPR(k) = PLEV(K)-PLEV(K-1)
99	U(k) = Cmk*DPR(k) ! only Cmk line in optci.F
100
101	!--- Kasting's CIA ----------------------------------------
102	!dz(k)=dpr(k)189.02TMID(K)/(0.03720*PMID(K))
103	! this is CO2 path length (in cm) as written by Francois
104	! delta_z = delta_p * R_specific * T / (g * P)
105	! But Kasting states that W is in units of _atmosphere_ cm
106	! So we do
107	!dz(k)=dz(k)*(PMID(K)/1013.25)
108	!dz(k)=dz(k)/100.0 ! in m for SI calc
109	!----------------------------------------------------------
110
111	! if we have continuum opacities, we need dz
112	dz(k)=dpr(k)RTMID(K)/(g*PMID(K))
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
121
122	DO NW=1,L_NSPECTI
123	do iaer=1,naerkind
124	TAEROS(K,NW,IAER) = TAUAERO(K,IAER) * QXIAER(K,NW,IAER)
125	end do
126	END DO
127	end do ! levels
128
129	do K=2,L_LEVELS
130	do nw=1,L_NSPECTI
131
132	DCONT = 0.0 ! continuum absorption
133
134	! include H2 continuum
135	do igas=1,ngasmx
136	if(gnom(igas).eq.'H2_')then
137
138	wn_cont = dble(wnoi(nw))
139	T_cont = dble(TMID(k))
140	p_cont = dble(PMID(k)scalepgfrac(igas))
141
142	call interpolateH2H2(wn_cont,T_cont,p_cont,DCONT,.false.)
143
144	DCONT=DCONT*dz(k)
145
146
147	endif
148	enddo
149
150	!--- Kasting's CIA ----------------------------------------
151	!DCO2 = dz(k)Ci(nw)(1.2859PMID(k)/1000.0)(TMID(k)/300.)**Ti(nw)
152	!DCO2 = 130Ci(nw)(pmid(k)/1013.25)*2(tmid(k)/300.)*Ti(nw) dz(k)
153	! these two have been verified to give the same results
154	!----------------------------------------------------------
155
156	! Water continuum currently inactive!
157	!if(varactive)then
158	! call water_cont(PMID(K),TMID(K),WRATIO(K),WNOI(nw),DCO2)
159	!endif
160
161	do ng=1,L_NGAUSS-1
162
163	! Now compute TAUGAS
164
165	! Interpolate between water mixing ratios
166	! WRATIO = 0.0 if the requested water amount is equal to, or outside the
167	! the water data range
168
169	if(L_REFVAR.eq.1)then ! added by RW for special no variable case
170	KCOEF(1) = GASI(MT(K),MP(K),1,NW,NG)
171	KCOEF(2) = GASI(MT(K),MP(K)+1,1,NW,NG)
172	KCOEF(3) = GASI(MT(K)+1,MP(K)+1,1,NW,NG)
173	KCOEF(4) = GASI(MT(K)+1,MP(K),1,NW,NG)
174	else
175
176	KCOEF(1) = GASI(MT(K),MP(K),NVAR(K),NW,NG) + WRATIO(K)* &
177	(GASI(MT(K),MP(K),NVAR(K)+1,NW,NG) - &
178	GASI(MT(K),MP(K),NVAR(K),NW,NG))
179
180	KCOEF(2) = GASI(MT(K),MP(K)+1,NVAR(K),NW,NG) + WRATIO(K)* &
181	(GASI(MT(K),MP(K)+1,NVAR(K)+1,NW,NG) - &
182	GASI(MT(K),MP(K)+1,NVAR(K),NW,NG))
183
184	KCOEF(3) = GASI(MT(K)+1,MP(K)+1,NVAR(K),NW,NG) + WRATIO(K)* &
185	(GASI(MT(K)+1,MP(K)+1,NVAR(K)+1,NW,NG) - &
186	GASI(MT(K)+1,MP(K)+1,NVAR(K),NW,NG))
187
188	KCOEF(4) = GASI(MT(K)+1,MP(K),NVAR(K),NW,NG) + WRATIO(K)* &
189	(GASI(MT(K)+1,MP(K),NVAR(K)+1,NW,NG) - &
190	GASI(MT(K)+1,MP(K),NVAR(K),NW,NG))
191	endif
192
193	! Interpolate the gaseous k-coefficients to the requested T,P values
194
195	ANS = LKCOEF(K,1)KCOEF(1) + LKCOEF(K,2)KCOEF(2) + &
196	LKCOEF(K,3)KCOEF(3) + LKCOEF(K,4)KCOEF(4)
197
198	TAUGAS = U(k)*ANS
199
200	TAUGSURF(NW,NG) = TAUGSURF(NW,NG) + TAUGAS + DCONT
201	!TAUGSURF(NW,NG) = TAUGSURF(NW,NG) + TAUGAS
202
203	DTAUKI(K,nw,ng) = TAUGAS + DCONT ! For parameterized continuum absorption
204
205	do iaer=1,naerkind
206	DTAUKI(K,nw,ng) = DTAUKI(K,nw,ng) + TAEROS(K,NW,IAER)
207	end do ! a bug was here!
208
209	end do
210
211	! Now fill in the "clear" part of the spectrum (NG = L_NGAUSS),
212	! which holds continuum opacity only
213
214	NG = L_NGAUSS
215	DTAUKI(K,nw,ng) = 0.0 + DCONT ! For parameterized continuum absorption
216
217	do iaer=1,naerkind
218	DTAUKI(K,nw,ng) = DTAUKI(K,nw,ng) + TAEROS(K,NW,IAER)
219	end do ! a bug was here!
220
221	end do
222	end do
223
224
225	!=======================================================================
226	! Now the full treatment for the layers, where besides the opacity
227	! we need to calculate the scattering albedo and asymmetry factors
228
229	DO NW=1,L_NSPECTI
230	DO K=2,L_LEVELS+1
231	do iaer=1,naerkind
232	TAUAEROLK(K,NW,IAER) = TAUAERO(K,IAER)*QSIAER(K,NW,IAER)
233	end do
234	ENDDO
235	ENDDO
236
237	DO NW=1,L_NSPECTI
238	NG = L_NGAUSS
239	DO L=1,L_NLAYRAD
240
241	K = 2*L+1
242	DTAUI(L,nw,ng) = DTAUKI(K,NW,NG) + DTAUKI(K+1,NW,NG)! + 1.e-50
243
244	atemp = 0.
245	btemp = 0.
246	if(DTAUI(L,NW,NG) .GT. 1.0E-9) then
247	do iaer=1,naerkind
248	atemp = atemp + &
249	GIAER(K,NW,IAER) * TAUAEROLK(K,NW,IAER) + &
250	GIAER(K+1,NW,IAER) * TAUAEROLK(K+1,NW,IAER)
251	btemp = btemp + TAUAEROLK(K,NW,IAER) + TAUAEROLK(K+1,NW,IAER)
252	! * + 1.e-10
253	end do
254	WBARI(L,nw,ng) = btemp / DTAUI(L,NW,NG)
255	else
256	WBARI(L,nw,ng) = 0.0D0
257	DTAUI(L,NW,NG) = 1.0E-9
258	endif
259
260	if(btemp .GT. 0.0) then
261	cosbi(L,NW,NG) = atemp/btemp
262	else
263	cosbi(L,NW,NG) = 0.0D0
264	end if
265
266	END DO ! L vertical loop
267
268	! Now the other Gauss points, if needed.
269
270	DO NG=1,L_NGAUSS-1
271	IF(TAUGSURF(NW,NG) .gt. TLIMIT) THEN
272
273	DO L=1,L_NLAYRAD
274	K = 2*L+1
275	DTAUI(L,nw,ng) = DTAUKI(K,NW,NG)+DTAUKI(K+1,NW,NG)! + 1.e-50
276
277	btemp = 0.
278	if(DTAUI(L,NW,NG) .GT. 1.0E-9) then
279
280	do iaer=1,naerkind
281	btemp = btemp + TAUAEROLK(K,NW,IAER) + TAUAEROLK(K+1,NW,IAER)
282	end do
283	WBARI(L,nw,ng) = btemp / DTAUI(L,NW,NG)
284
285	else
286	WBARI(L,nw,ng) = 0.0D0
287	DTAUI(L,NW,NG) = 1.0E-9
288	endif
289
290	cosbi(L,NW,NG) = cosbi(L,NW,L_NGAUSS)
291	END DO ! L vertical loop
292	END IF
293
294	END DO ! NG Gauss loop
295	END DO ! NW spectral loop
296
297	! Total extinction optical depths
298
299	DO NW=1,L_NSPECTI
300	DO NG=1,L_NGAUSS ! full gauss loop
301	TAUI(1,NW,NG)=0.0D0
302	DO L=1,L_NLAYRAD
303	TAUI(L+1,NW,NG)=TAUI(L,NW,NG)+DTAUI(L,NW,NG)
304	END DO
305
306	TAUCUMI(1,NW,NG)=0.0D0
307	DO K=2,L_LEVELS
308	TAUCUMI(K,NW,NG)=TAUCUMI(K-1,NW,NG)+DTAUKI(K,NW,NG)
309	END DO
310	END DO ! end full gauss loop
311	END DO
312
313
314	return
315	end subroutine optci
316
317
318	!-------------------------------------------------------------------------
319	subroutine water_cont(p,T,wratio,nu,DCONT)
320	! Calculates the continuum opacity for H2O
321	! NOT CURRENTLY USED
322
323	implicit none
324
325	real p, T, wratio, nu, DCONT
326	real h1, h2
327
328	h1 = exp(1800.*(1./T - 0.0034))
329	h2 = 1.25e-22 + 1.67e-19exp(-2.62e-13nu)
330
331	! DCONT = h1h2p(pwratio)*2/(RT)
332	! DCONT=0.0 ! to be implemented...
333
334	return
335
336	end subroutine water_cont
337

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