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aeropacity.F90 @ 1243

Last change on this file since 1243 was 1132, checked in by sglmd, 11 years ago
standard Saturn aerosol scenario modified
File size: 16.1 KB

Rev	Line
[253]	1	Subroutine aeropacity(ngrid,nlayer,nq,pplay,pplev,pq, &
	2	aerosol,reffrad,QREFvis3d,QREFir3d,tau_col,cloudfrac,totcloudfrac,clearsky)
[135]	3
[726]	4	use radinc_h, only : L_TAUMAX,naerkind
	5	use aerosol_mod
[787]	6	USE comgeomfi_h
[858]	7	USE tracer_h, only: noms,rho_co2,rho_ice
[135]	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
[787]	32	! QREFvis3d(ngrid,nlayermx,naerkind) \ 3d extinction coefficients
	33	! QREFir3d(ngrid,nlayermx,naerkind) / at reference wavelengths
[135]	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"
[726]	46	#include "comvert.h"
[135]	47
[858]	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
[135]	63
[253]	64	real aerosol0
	65
[135]	66	INTEGER l,ig,iq,iaer
	67
[858]	68	LOGICAL,SAVE :: firstcall=.true.
[135]	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
[253]	76	! for fixed dust profiles
	77	real topdust, expfactor, zp
[787]	78	REAL taudusttmp(ngrid) ! Temporary dust opacity used before scaling
	79	REAL tauh2so4tmp(ngrid) ! Temporary h2so4 opacity used before scaling
[858]	80
[728]	81	real CLFtot
[253]	82
	83	! identify tracers
[135]	84	IF (firstcall) THEN
	85
[726]	86	write(,) "Tracers found in aeropacity:"
[787]	87	do iq=1,nq
[135]	88	tracername=noms(iq)
	89	if (tracername.eq."co2_ice") then
	90	i_co2ice=iq
[726]	91	write(,) "i_co2ice=",i_co2ice
	92
[135]	93	endif
	94	if (tracername.eq."h2o_ice") then
	95	i_h2oice=iq
[726]	96	write(,) "i_h2oice=",i_h2oice
[135]	97	endif
	98	enddo
	99
[741]	100	if (noaero) then
	101	print*, "No active aerosols found in aeropacity"
	102	else
[726]	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"
[741]	106	write(,) "Active aerosols found in aeropacity:"
[726]	107	endif
[253]	108
[741]	109	if ((iaero_co2.ne.0).and.(.not.noaero)) then
[726]	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
[1026]	121	if (iaero_back2lay.ne.0) then
	122	print*,'iaero_back2lay= ',iaero_back2lay
	123	endif
[726]	124
[135]	125	firstcall=.false.
	126	ENDIF ! of IF (firstcall)
	127
	128
	129	! ---------------------------------------------------------
	130	!==================================================================
[726]	131	! CO2 ice aerosols
[135]	132	!==================================================================
	133
[728]	134	if (iaero_co2.ne.0) then
[726]	135	iaer=iaero_co2
[135]	136	! 1. Initialization
[787]	137	aerosol(1:ngrid,1:nlayermx,iaer)=0.0
[135]	138	! 2. Opacity calculation
[804]	139	if (noaero) then ! aerosol set to zero
	140	aerosol(1:ngrid,1:nlayermx,iaer)=0.0
[741]	141	elseif (aerofixco2.or.(i_co2ice.eq.0)) then ! CO2 ice cloud prescribed
[787]	142	aerosol(1:ngrid,1:nlayermx,iaer)=1.e-9
	143	!aerosol(1:ngrid,12,iaer)=4.0 ! single cloud layer option
[253]	144	else
	145	DO ig=1, ngrid
	146	DO l=1,nlayer-1 ! to stop the rad tran bug
[135]	147
[253]	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
[726]	157	! print*, aerosol(ig,l,iaer)
[253]	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
[726]	165	end if ! if fixed or varying
[728]	166	end if ! if CO2 aerosols
[135]	167	!==================================================================
[726]	168	! Water ice / liquid
[135]	169	!==================================================================
	170
[728]	171	if (iaero_h2o.ne.0) then
[726]	172	iaer=iaero_h2o
[135]	173	! 1. Initialization
[787]	174	aerosol(1:ngrid,1:nlayermx,iaer)=0.0
[135]	175	! 2. Opacity calculation
[726]	176	if (aerofixh2o.or.(i_h2oice.eq.0).or.clearsky) then
[787]	177	aerosol(1:ngrid,1:nlayermx,iaer) =1.e-9
[305]	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
[253]	210	else
[728]	211
[253]	212	do ig=1, ngrid
	213	do l=1,nlayer-1 ! to stop the rad tran bug
[135]	214
[728]	215	aerosol(ig,l,iaer) = & !modification by BC
[253]	216	( 0.75 * QREFvis3d(ig,l,iaer) / &
	217	( rho_ice * reffrad(ig,l,iaer) ) ) * &
[716]	218	! pq(ig,l,i_h2oice) * & !JL I dropped the +1e-9 here to have the same
[728]	219	!( pplev(ig,l) - pplev(ig,l+1) ) / g ! opacity in the clearsky=true and the
	220	! clear=false/pq=0 case
[716]	221	( pq(ig,l,i_h2oice) + 1.E-9 ) * & ! Doing this makes the code unstable, so I have restored it (RW)
[728]	222	( pplev(ig,l) - pplev(ig,l+1) ) / g
[135]	223
[253]	224	enddo
	225	enddo
[135]	226
[728]	227	if(CLFvarying)then
[787]	228	call totalcloudfrac(ngrid,nq,cloudfrac,totcloudfrac,pplev,pq,aerosol(1:ngrid,1:nlayermx,iaer))
[728]	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
[726]	249	!==================================================================
	250	! Dust
	251	!==================================================================
[728]	252	if (iaero_dust.ne.0) then
[726]	253	iaer=iaero_dust
	254	! 1. Initialization
[787]	255	aerosol(1:ngrid,1:nlayermx,iaer)=0.0
[726]	256
[728]	257	topdust=30.0 ! km (used to be 10.0 km) LK
[726]	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
[728]	299	end if ! If dust aerosol
[726]	300
[135]	301	!==================================================================
[726]	302	! H2SO4
[253]	303	!==================================================================
[726]	304	! added by LK
	305	if (iaero_h2so4.ne.0) then
[728]	306	iaer=iaero_h2so4
[135]	307
[253]	308	! 1. Initialization
[787]	309	aerosol(1:ngrid,1:nlayermx,iaer)=0.0
[253]	310
	311
	312	! 2. Opacity calculation
	313
[726]	314	! expfactor=0.
[728]	315	DO l=1,nlayer-1
	316	DO ig=1,ngrid
	317	! Typical mixing ratio profile
[253]	318
[728]	319	zp=(preff/pplay(ig,l))**(70./30) !emulating topdust
	320	expfactor=max(exp(0.007*(1.-max(zp,1.))),1.e-3)
[135]	321
[726]	322	! Vertical scaling function
[728]	323	aerosol(ig,l,iaer)= (pplev(ig,l)-pplev(ig,l+1))*expfactor
[135]	324
[728]	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, &
[726]	336	1 &
	337	* pplev(ig,1) / preff &
	338	* aerosol(ig,l,iaer) &
	339	/ tauh2so4tmp(ig))
	340
	341	ENDDO
[728]	342	ENDDO
[726]	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
[1026]	360	! ---------------------------------------------------------
	361	!==================================================================
	362	! Two-layer aerosols (unknown composition)
	363	! S. Guerlet (2013)
	364	!==================================================================
[726]	365
[1026]	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)
[1132]	383	aerosol(ig,l,iaer)= obs_tau_col_tropo((pplev(ig,l)/pres_top_tropo)expfactor)aerosol(ig,l,iaer)/1.5
[1026]	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
[135]	413	! --------------------------------------------------------------------------
	414	! Column integrated visible optical depth in each point (used for diagnostic)
	415
[253]	416	tau_col(:)=0.0
[135]	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
[787]	425	do ig=1,ngrid
[253]	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
[787]	438	do ig=1,ngrid
[253]	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
[135]	447	return
	448	end subroutine aeropacity
	449

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