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source: codes/icosagcm/branches/SATURN_DYNAMICO/LMDZ.COMMON/libf/phystd/aeropacity.F90 @ 224

Last change on this file since 224 was 222, checked in by ymipsl, 10 years ago

Creating temporary dynamico/lmdz/saturn branche

YM

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1	Subroutine aeropacity(ngrid,nlayer,nq,pplay,pplev,pq, &
2	aerosol,reffrad,QREFvis3d,QREFir3d,tau_col,cloudfrac,totcloudfrac,clearsky)
3
4	use radinc_h, only : L_TAUMAX,naerkind
5	use aerosol_mod
6	USE comgeomfi_h
7	USE tracer_h, only: noms,rho_co2,rho_ice
8
9	implicit none
10
11	!==================================================================
12	!
13	! Purpose
14	! -------
15	! Compute aerosol optical depth in each gridbox.
16	!
17	! Authors
18	! -------
19	! F. Forget
20	! F. Montmessin (water ice scheme)
21	! update J.-B. Madeleine (2008)
22	! dust removal, simplification by Robin Wordsworth (2009)
23	!
24	! Input
25	! -----
26	! ngrid Number of horizontal gridpoints
27	! nlayer Number of layers
28	! nq Number of tracers
29	! pplev Pressure (Pa) at each layer boundary
30	! pq Aerosol mixing ratio
31	! reffrad(ngrid,nlayer,naerkind) Aerosol effective radius
32	! QREFvis3d(ngrid,nlayermx,naerkind) \ 3d extinction coefficients
33	! QREFir3d(ngrid,nlayermx,naerkind) / at reference wavelengths
34	!
35	! Output
36	! ------
37	! aerosol Aerosol optical depth in layer l, grid point ig
38	! tau_col Total column optical depth at grid point ig
39	!
40	!=======================================================================
41
42	#include "dimensions.h"
43	#include "dimphys.h"
44	#include "callkeys.h"
45	#include "comcstfi.h"
46	#include "comvert.h"
47
48	INTEGER,INTENT(IN) :: ngrid ! number of atmospheric columns
49	INTEGER,INTENT(IN) :: nlayer ! number of atmospheric layers
50	INTEGER,INTENT(IN) :: nq ! number of tracers
51	REAL,INTENT(IN) :: pplay(ngrid,nlayer) ! mid-layer pressure (Pa)
52	REAL,INTENT(IN) :: pplev(ngrid,nlayer+1) ! inter-layer pressure (Pa)
53	REAL,INTENT(IN) :: pq(ngrid,nlayer,nq) ! tracers (.../kg_of_air)
54	REAL,INTENT(OUT) :: aerosol(ngrid,nlayer,naerkind) ! aerosol optical depth
55	REAL,INTENT(IN) :: reffrad(ngrid,nlayer,naerkind) ! aerosol effective radius
56	REAL,INTENT(IN) :: QREFvis3d(ngrid,nlayermx,naerkind) ! extinction coefficient in the visible
57	REAL,INTENT(IN) :: QREFir3d(ngrid,nlayermx,naerkind)
58	REAL,INTENT(OUT):: tau_col(ngrid) !column integrated visible optical depth
59	! BENJAMIN MODIFS
60	real,intent(in) :: cloudfrac(ngrid,nlayermx) ! cloud fraction
61	real,intent(out) :: totcloudfrac(ngrid) ! total cloud fraction
62	logical,intent(in) :: clearsky
63
64	real aerosol0
65
66	INTEGER l,ig,iq,iaer
67
68	LOGICAL,SAVE :: firstcall=.true.
69	REAL CBRT
70	EXTERNAL CBRT
71
72	INTEGER,SAVE :: i_co2ice=0 ! co2 ice
73	INTEGER,SAVE :: i_h2oice=0 ! water ice
74	CHARACTER(LEN=20) :: tracername ! to temporarily store text
75
76	! for fixed dust profiles
77	real topdust, expfactor, zp
78	REAL taudusttmp(ngrid) ! Temporary dust opacity used before scaling
79	REAL tauh2so4tmp(ngrid) ! Temporary h2so4 opacity used before scaling
80
81	real CLFtot
82
83	! identify tracers
84	IF (firstcall) THEN
85
86	write(,) "Tracers found in aeropacity:"
87	do iq=1,nq
88	tracername=noms(iq)
89	if (tracername.eq."co2_ice") then
90	i_co2ice=iq
91	write(,) "i_co2ice=",i_co2ice
92
93	endif
94	if (tracername.eq."h2o_ice") then
95	i_h2oice=iq
96	write(,) "i_h2oice=",i_h2oice
97	endif
98	enddo
99
100	if (noaero) then
101	print*, "No active aerosols found in aeropacity"
102	else
103	print*, "If you would like to use aerosols, make sure any old"
104	print*, "start files are updated in newstart using the option"
105	print*, "q=0"
106	write(,) "Active aerosols found in aeropacity:"
107	endif
108
109	if ((iaero_co2.ne.0).and.(.not.noaero)) then
110	print*, 'iaero_co2= ',iaero_co2
111	endif
112	if (iaero_h2o.ne.0) then
113	print*,'iaero_h2o= ',iaero_h2o
114	endif
115	if (iaero_dust.ne.0) then
116	print*,'iaero_dust= ',iaero_dust
117	endif
118	if (iaero_h2so4.ne.0) then
119	print*,'iaero_h2so4= ',iaero_h2so4
120	endif
121	if (iaero_back2lay.ne.0) then
122	print*,'iaero_back2lay= ',iaero_back2lay
123	endif
124
125	firstcall=.false.
126	ENDIF ! of IF (firstcall)
127
128
129	! ---------------------------------------------------------
130	!==================================================================
131	! CO2 ice aerosols
132	!==================================================================
133
134	if (iaero_co2.ne.0) then
135	iaer=iaero_co2
136	! 1. Initialization
137	aerosol(1:ngrid,1:nlayermx,iaer)=0.0
138	! 2. Opacity calculation
139	if (noaero) then ! aerosol set to zero
140	aerosol(1:ngrid,1:nlayermx,iaer)=0.0
141	elseif (aerofixco2.or.(i_co2ice.eq.0)) then ! CO2 ice cloud prescribed
142	aerosol(1:ngrid,1:nlayermx,iaer)=1.e-9
143	!aerosol(1:ngrid,12,iaer)=4.0 ! single cloud layer option
144	else
145	DO ig=1, ngrid
146	DO l=1,nlayer-1 ! to stop the rad tran bug
147
148	aerosol0 = &
149	( 0.75 * QREFvis3d(ig,l,iaer) / &
150	( rho_co2 * reffrad(ig,l,iaer) ) ) * &
151	( pq(ig,l,i_co2ice) + 1.E-9 ) * &
152	( pplev(ig,l) - pplev(ig,l+1) ) / g
153	aerosol0 = max(aerosol0,1.e-9)
154	aerosol0 = min(aerosol0,L_TAUMAX)
155	aerosol(ig,l,iaer) = aerosol0
156	! aerosol(ig,l,iaer) = 0.0
157	! print*, aerosol(ig,l,iaer)
158	! using cloud fraction
159	! aerosol(ig,l,iaer) = -log(1 - CLF + CLF*exp(-aerosol0/CLF))
160	! aerosol(ig,l,iaer) = min(aerosol(ig,l,iaer),L_TAUMAX)
161
162
163	ENDDO
164	ENDDO
165	end if ! if fixed or varying
166	end if ! if CO2 aerosols
167	!==================================================================
168	! Water ice / liquid
169	!==================================================================
170
171	if (iaero_h2o.ne.0) then
172	iaer=iaero_h2o
173	! 1. Initialization
174	aerosol(1:ngrid,1:nlayermx,iaer)=0.0
175	! 2. Opacity calculation
176	if (aerofixh2o.or.(i_h2oice.eq.0).or.clearsky) then
177	aerosol(1:ngrid,1:nlayermx,iaer) =1.e-9
178
179	! put cloud at cloudlvl
180	if(kastprof.and.(cloudlvl.ne.0.0))then
181	ig=1
182	do l=1,nlayer
183	if(int(cloudlvl).eq.l)then
184	!if(cloudlvl.gt.(pplay(ig,l)/pplev(ig,1)))then
185	print*,'Inserting cloud at level ',l
186	!aerosol(ig,l,iaer)=10.0
187
188	rho_ice=920.0
189
190	! the Kasting approximation
191	aerosol(ig,l,iaer) = &
192	( 0.75 * QREFvis3d(ig,l,iaer) / &
193	( rho_ice * reffrad(ig,l,iaer) ) ) * &
194	!( pq(ig,l,i_h2oice) + 1.E-9 ) * &
195	( 4.0e-4 + 1.E-9 ) * &
196	( pplev(ig,l) - pplev(ig,l+1) ) / g
197
198
199	open(115,file='clouds.out',form='formatted')
200	write(115,*) l,aerosol(ig,l,iaer)
201	close(115)
202
203	return
204	endif
205	end do
206
207	call abort
208	endif
209
210	else
211
212	do ig=1, ngrid
213	do l=1,nlayer-1 ! to stop the rad tran bug
214
215	aerosol(ig,l,iaer) = & !modification by BC
216	( 0.75 * QREFvis3d(ig,l,iaer) / &
217	( rho_ice * reffrad(ig,l,iaer) ) ) * &
218	! pq(ig,l,i_h2oice) * & !JL I dropped the +1e-9 here to have the same
219	!( pplev(ig,l) - pplev(ig,l+1) ) / g ! opacity in the clearsky=true and the
220	! clear=false/pq=0 case
221	( pq(ig,l,i_h2oice) + 1.E-9 ) * & ! Doing this makes the code unstable, so I have restored it (RW)
222	( pplev(ig,l) - pplev(ig,l+1) ) / g
223
224	enddo
225	enddo
226
227	if(CLFvarying)then
228	call totalcloudfrac(ngrid,nq,cloudfrac,totcloudfrac,pplev,pq,aerosol(1:ngrid,1:nlayermx,iaer))
229	do ig=1, ngrid
230	do l=1,nlayer-1 ! to stop the rad tran bug
231	CLFtot = max(totcloudfrac(ig),0.01)
232	aerosol(ig,l,iaer)=aerosol(ig,l,iaer)/CLFtot
233	aerosol(ig,l,iaer) = max(aerosol(ig,l,iaer),1.e-9)
234	enddo
235	enddo
236	else
237	do ig=1, ngrid
238	do l=1,nlayer-1 ! to stop the rad tran bug
239	CLFtot = CLFfixval
240	aerosol(ig,l,iaer)=aerosol(ig,l,iaer)/CLFtot
241	aerosol(ig,l,iaer) = max(aerosol(ig,l,iaer),1.e-9)
242	enddo
243	enddo
244	end if!(CLFvarying)
245	endif !(aerofixed.or.(i_h2oice.eq.0).or.clearsky)
246
247	end if ! End if h2o aerosol
248
249	!==================================================================
250	! Dust
251	!==================================================================
252	if (iaero_dust.ne.0) then
253	iaer=iaero_dust
254	! 1. Initialization
255	aerosol(1:ngrid,1:nlayermx,iaer)=0.0
256
257	topdust=30.0 ! km (used to be 10.0 km) LK
258
259	! 2. Opacity calculation
260
261	! expfactor=0.
262	DO l=1,nlayer-1
263	DO ig=1,ngrid
264	! Typical mixing ratio profile
265
266	zp=(preff/pplay(ig,l))**(70./topdust)
267	expfactor=max(exp(0.007*(1.-max(zp,1.))),1.e-3)
268
269	! Vertical scaling function
270	aerosol(ig,l,iaer)= (pplev(ig,l)-pplev(ig,l+1)) &
271	*expfactor
272
273
274	ENDDO
275	ENDDO
276
277	! Rescaling each layer to reproduce the choosen (or assimilated)
278	! dust extinction opacity at visible reference wavelength, which
279	! is scaled to the "preff" reference surface pressure available in comvert.h
280	! and stored in startfi.nc
281
282	taudusttmp(1:ngrid)=0.
283	DO l=1,nlayer
284	DO ig=1,ngrid
285	taudusttmp(ig) = taudusttmp(ig) &
286	+ aerosol(ig,l,iaer)
287	ENDDO
288	ENDDO
289	DO l=1,nlayer-1
290	DO ig=1,ngrid
291	aerosol(ig,l,iaer) = max(1E-20, &
292	dusttau &
293	* pplev(ig,1) / preff &
294	* aerosol(ig,l,iaer) &
295	/ taudusttmp(ig))
296
297	ENDDO
298	ENDDO
299	end if ! If dust aerosol
300
301	!==================================================================
302	! H2SO4
303	!==================================================================
304	! added by LK
305	if (iaero_h2so4.ne.0) then
306	iaer=iaero_h2so4
307
308	! 1. Initialization
309	aerosol(1:ngrid,1:nlayermx,iaer)=0.0
310
311
312	! 2. Opacity calculation
313
314	! expfactor=0.
315	DO l=1,nlayer-1
316	DO ig=1,ngrid
317	! Typical mixing ratio profile
318
319	zp=(preff/pplay(ig,l))**(70./30) !emulating topdust
320	expfactor=max(exp(0.007*(1.-max(zp,1.))),1.e-3)
321
322	! Vertical scaling function
323	aerosol(ig,l,iaer)= (pplev(ig,l)-pplev(ig,l+1))*expfactor
324
325	ENDDO
326	ENDDO
327	tauh2so4tmp(1:ngrid)=0.
328	DO l=1,nlayer
329	DO ig=1,ngrid
330	tauh2so4tmp(ig) = tauh2so4tmp(ig) + aerosol(ig,l,iaer)
331	ENDDO
332	ENDDO
333	DO l=1,nlayer-1
334	DO ig=1,ngrid
335	aerosol(ig,l,iaer) = max(1E-20, &
336	1 &
337	* pplev(ig,1) / preff &
338	* aerosol(ig,l,iaer) &
339	/ tauh2so4tmp(ig))
340
341	ENDDO
342	ENDDO
343
344	! 1/700. is assuming a "sulfurtau" of 1
345	! Sulfur aerosol routine to be improved.
346	! aerosol0 = &
347	! ( 0.75 * QREFvis3d(ig,l,iaer) / &
348	! ( rho_h2so4 * reffrad(ig,l,iaer) ) ) * &
349	! ( pq(ig,l,i_h2so4) + 1.E-9 ) * &
350	! ( pplev(ig,l) - pplev(ig,l+1) ) / g
351	! aerosol0 = max(aerosol0,1.e-9)
352	! aerosol0 = min(aerosol0,L_TAUMAX)
353	! aerosol(ig,l,iaer) = aerosol0
354
355	! ENDDO
356	! ENDDO
357	end if
358
359
360	! ---------------------------------------------------------
361	!==================================================================
362	! Two-layer aerosols (unknown composition)
363	! S. Guerlet (2013)
364	!==================================================================
365
366	if (iaero_back2lay .ne.0) then
367	iaer=iaero_back2lay
368	! 1. Initialization
369	aerosol(1:ngrid,1:nlayermx,iaer)=0.0
370	! 2. Opacity calculation
371	DO ig=1,ngrid
372	DO l=1,nlayer-1
373	aerosol(ig,l,iaer) = ( pplev(ig,l) - pplev(ig,l+1) )
374	!! 1. below tropospheric layer: no aerosols
375	IF (pplev(ig,l) .gt. pres_bottom_tropo) THEN
376	aerosol(ig,l,iaer) = 0.*aerosol(ig,l,iaer)
377	!! 2. tropo layer
378	ELSEIF (pplev(ig,l) .le. pres_bottom_tropo .and. pplev(ig,l) .ge. pres_top_tropo) THEN
379	aerosol(ig,l,iaer) = obs_tau_col_tropo*aerosol(ig,l,iaer)
380	!! 3. linear transition
381	ELSEIF (pplev(ig,l) .lt. pres_top_tropo .and. pplev(ig,l) .gt. pres_bottom_strato) THEN
382	expfactor=log(obs_tau_col_strato/obs_tau_col_tropo)/log(pres_bottom_strato/pres_top_tropo)
383	aerosol(ig,l,iaer)= obs_tau_col_tropo((pplev(ig,l)/pres_top_tropo)expfactor)aerosol(ig,l,iaer)/1.5
384	!! 4. strato layer
385	ELSEIF (pplev(ig,l) .le. pres_bottom_strato .and. pplev(ig,l) .gt. pres_top_strato) THEN
386	aerosol(ig,l,iaer)= obs_tau_col_strato*aerosol(ig,l,iaer)
387	!! 5. above strato layer: no aerosols
388	ELSEIF (pplev(ig,l) .lt. pres_top_strato) THEN
389	aerosol(ig,l,iaer) = 0.*aerosol(ig,l,iaer)
390	ENDIF
391	ENDDO
392	ENDDO
393
394	! 3. Re-normalize to observed total column
395	tau_col(:)=0.0
396	DO l=1,nlayer
397	DO ig=1,ngrid
398	tau_col(ig) = tau_col(ig) &
399	+ aerosol(ig,l,iaer)/(obs_tau_col_tropo+obs_tau_col_strato)
400	ENDDO
401	ENDDO
402
403	DO ig=1,ngrid
404	DO l=1,nlayer-1
405	aerosol(ig,l,iaer)=aerosol(ig,l,iaer)/tau_col(ig)
406	ENDDO
407	ENDDO
408
409
410	end if ! if Two-layer aerosols
411
412
413	! --------------------------------------------------------------------------
414	! Column integrated visible optical depth in each point (used for diagnostic)
415
416	tau_col(:)=0.0
417	do iaer = 1, naerkind
418	do l=1,nlayer
419	do ig=1,ngrid
420	tau_col(ig) = tau_col(ig) + aerosol(ig,l,iaer)
421	end do
422	end do
423	end do
424
425	do ig=1,ngrid
426	do l=1,nlayer
427	do iaer = 1, naerkind
428	if(aerosol(ig,l,iaer).gt.1.e3)then
429	print*,'WARNING: aerosol=',aerosol(ig,l,iaer)
430	print*,'at ig=',ig,', l=',l,', iaer=',iaer
431	print*,'QREFvis3d=',QREFvis3d(ig,l,iaer)
432	print*,'reffrad=',reffrad(ig,l,iaer)
433	endif
434	end do
435	end do
436	end do
437
438	do ig=1,ngrid
439	if(tau_col(ig).gt.1.e3)then
440	print*,'WARNING: tau_col=',tau_col(ig)
441	print*,'at ig=',ig
442	print*,'aerosol=',aerosol(ig,:,:)
443	print*,'QREFvis3d=',QREFvis3d(ig,:,:)
444	print*,'reffrad=',reffrad(ig,:,:)
445	endif
446	end do
447	return
448	end subroutine aeropacity
449

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