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initracer.F @ 1711

Last change on this file since 1711 was 1685, checked in by jaudouard, 8 years ago
Further modifications on CO2 clouds scheme. Water ice clouds can now serve as CCN for CO2 clouds
File size: 23.4 KB

Rev	Line
[1224]	1	SUBROUTINE initracer(ngrid,nq,qsurf)
[38]	2
[1036]	3	use tracer_mod
[1226]	4	USE comcstfi_h
[38]	5	IMPLICIT NONE
	6	c=======================================================================
	7	c subject:
	8	c --------
	9	c Initialization related to tracer
	10	c (transported dust, water, chemical species, ice...)
	11	c
	12	c Name of the tracer
	13	c
	14	c Test of dimension :
[1036]	15	c Initialize tracer related data in tracer_mod, using tracer names provided
	16	c by the dynamics in "infotrac"
[38]	17	c
	18	c
	19	c author: F.Forget
	20	c ------
	21	c Modifs: Franck Montmessin, Sebastien Lebonnois (june 2003)
	22	c Ehouarn Millour (oct. 2008) identify tracers by their names
	23	c=======================================================================
	24
	25
	26	#include "callkeys.h"
	27
[1036]	28	integer,intent(in) :: ngrid ! number of atmospheric columns
	29	integer,intent(in) :: nq ! number of tracers
	30	real,intent(out) :: qsurf(ngrid,nq) ! tracer on surface (e.g. kg.m-2)
	31
[283]	32	integer iq,ig,count
[38]	33	real r0_lift , reff_lift, nueff_lift
	34	c Ratio of small over large dust particles (used when both
	35	c doubleq and the submicron mode are active); In Montmessin
	36	c et al. (2002), a value of 25 has been deduced;
	37	real, parameter :: popratio = 25.
	38	character(len=20) :: txt ! to store some text
	39
	40	c-----------------------------------------------------------------------
[1036]	41	c radius(nq) ! aerosol particle radius (m)
	42	c rho_q(nq) ! tracer densities (kg.m-3)
	43	c alpha_lift(nq) ! saltation vertical flux/horiz flux ratio (m-1)
	44	c alpha_devil(nq) ! lifting coeeficient by dust devil
[38]	45	c rho_dust ! Mars dust density
	46	c rho_ice ! Water ice density
	47	c nuice_ref ! Effective variance nueff of the
	48	c ! water-ice size distributions
	49	c doubleq ! if method with mass (iq=1) and number(iq=2) mixing ratio
	50	c varian ! Characteristic variance of log-normal distribution
	51	c-----------------------------------------------------------------------
	52
[1036]	53
[38]	54	c------------------------------------------------------------
	55	c NAME and molar mass of the tracer
	56	c------------------------------------------------------------
	57
	58	! Identify tracers by their names: (and set corresponding values of mmol)
	59	! 0. initialize tracer indexes to zero:
[1036]	60	igcm_dustbin(1:nq)=0
[1617]	61	igcm_co2_ice=0
	62	igcm_ccnco2_mass=0
	63	igcm_ccnco2_number=0
[38]	64	igcm_dust_mass=0
	65	igcm_dust_number=0
[358]	66	igcm_ccn_mass=0
	67	igcm_ccn_number=0
[38]	68	igcm_dust_submicron=0
	69	igcm_h2o_vap=0
	70	igcm_h2o_ice=0
	71	igcm_co2=0
	72	igcm_co=0
	73	igcm_o=0
	74	igcm_o1d=0
	75	igcm_o2=0
	76	igcm_o3=0
	77	igcm_h=0
	78	igcm_h2=0
	79	igcm_oh=0
	80	igcm_ho2=0
	81	igcm_h2o2=0
[459]	82	igcm_ch4=0
[38]	83	igcm_n2=0
	84	igcm_ar=0
	85	igcm_ar_n2=0
[171]	86	igcm_n=0
	87	igcm_no=0
	88	igcm_no2=0
	89	igcm_n2d=0
[1660]	90	igcm_he=0
[171]	91	igcm_co2plus=0
	92	igcm_oplus=0
	93	igcm_o2plus=0
	94	igcm_coplus=0
	95	igcm_cplus=0
	96	igcm_nplus=0
	97	igcm_noplus=0
	98	igcm_n2plus=0
	99	igcm_hplus=0
[635]	100	igcm_hco2plus=0
[171]	101	igcm_elec=0
[38]	102
	103	! 1. find dust tracers
	104	count=0
	105	if (dustbin.gt.0) then
[1036]	106	do iq=1,nq
[38]	107	txt=" "
	108	write(txt,'(a4,i2.2)')'dust',count+1
	109	if (noms(iq).eq.txt) then
	110	count=count+1
	111	igcm_dustbin(count)=iq
	112	mmol(iq)=100.
	113	endif
[1036]	114	enddo !do iq=1,nq
[38]	115	endif ! of if (dustbin.gt.0)
	116	if (doubleq) then
[1036]	117	do iq=1,nq
[38]	118	if (noms(iq).eq."dust_mass") then
	119	igcm_dust_mass=iq
	120	count=count+1
	121	endif
	122	if (noms(iq).eq."dust_number") then
	123	igcm_dust_number=iq
	124	count=count+1
	125	endif
	126	enddo
	127	endif ! of if (doubleq)
[740]	128	if (microphys) then
[1036]	129	do iq=1,nq
[358]	130	if (noms(iq).eq."ccn_mass") then
	131	igcm_ccn_mass=iq
	132	count=count+1
	133	endif
	134	if (noms(iq).eq."ccn_number") then
	135	igcm_ccn_number=iq
	136	count=count+1
	137	endif
	138	enddo
[740]	139	endif ! of if (microphys)
[38]	140	if (submicron) then
[1036]	141	do iq=1,nq
[38]	142	if (noms(iq).eq."dust_submicron") then
	143	igcm_dust_submicron=iq
	144	mmol(iq)=100.
	145	count=count+1
	146	endif
	147	enddo
	148	endif ! of if (submicron)
	149	! 2. find chemistry and water tracers
[1036]	150	do iq=1,nq
[38]	151	if (noms(iq).eq."co2") then
	152	igcm_co2=iq
	153	mmol(igcm_co2)=44.
	154	count=count+1
	155	endif
	156	if (noms(iq).eq."co") then
	157	igcm_co=iq
	158	mmol(igcm_co)=28.
	159	count=count+1
	160	endif
	161	if (noms(iq).eq."o") then
	162	igcm_o=iq
	163	mmol(igcm_o)=16.
	164	count=count+1
	165	endif
	166	if (noms(iq).eq."o1d") then
	167	igcm_o1d=iq
	168	mmol(igcm_o1d)=16.
	169	count=count+1
	170	endif
	171	if (noms(iq).eq."o2") then
	172	igcm_o2=iq
	173	mmol(igcm_o2)=32.
	174	count=count+1
	175	endif
	176	if (noms(iq).eq."o3") then
	177	igcm_o3=iq
	178	mmol(igcm_o3)=48.
	179	count=count+1
	180	endif
	181	if (noms(iq).eq."h") then
	182	igcm_h=iq
	183	mmol(igcm_h)=1.
	184	count=count+1
	185	endif
	186	if (noms(iq).eq."h2") then
	187	igcm_h2=iq
	188	mmol(igcm_h2)=2.
	189	count=count+1
	190	endif
	191	if (noms(iq).eq."oh") then
	192	igcm_oh=iq
	193	mmol(igcm_oh)=17.
	194	count=count+1
	195	endif
	196	if (noms(iq).eq."ho2") then
	197	igcm_ho2=iq
	198	mmol(igcm_ho2)=33.
	199	count=count+1
	200	endif
	201	if (noms(iq).eq."h2o2") then
	202	igcm_h2o2=iq
	203	mmol(igcm_h2o2)=34.
	204	count=count+1
	205	endif
	206	if (noms(iq).eq."n2") then
	207	igcm_n2=iq
	208	mmol(igcm_n2)=28.
	209	count=count+1
	210	endif
[324]	211	if (noms(iq).eq."ch4") then
	212	igcm_ch4=iq
	213	mmol(igcm_ch4)=16.
	214	count=count+1
	215	endif
[38]	216	if (noms(iq).eq."ar") then
	217	igcm_ar=iq
	218	mmol(igcm_ar)=40.
	219	count=count+1
	220	endif
[324]	221	if (noms(iq).eq."n") then
[171]	222	igcm_n=iq
	223	mmol(igcm_n)=14.
	224	count=count+1
	225	endif
	226	if (noms(iq).eq."no") then
	227	igcm_no=iq
	228	mmol(igcm_no)=30.
	229	count=count+1
	230	endif
	231	if (noms(iq).eq."no2") then
	232	igcm_no2=iq
	233	mmol(igcm_no2)=46.
	234	count=count+1
	235	endif
	236	if (noms(iq).eq."n2d") then
	237	igcm_n2d=iq
	238	mmol(igcm_n2d)=28.
	239	count=count+1
	240	endif
[1660]	241	if (noms(iq).eq."he") then
	242	igcm_he=iq
	243	mmol(igcm_he)=4.
	244	count=count+1
	245	endif
[171]	246	if (noms(iq).eq."co2plus") then
	247	igcm_co2plus=iq
	248	mmol(igcm_co2plus)=44.
	249	count=count+1
	250	endif
	251	if (noms(iq).eq."oplus") then
	252	igcm_oplus=iq
	253	mmol(igcm_oplus)=16.
	254	count=count+1
	255	endif
	256	if (noms(iq).eq."o2plus") then
	257	igcm_o2plus=iq
	258	mmol(igcm_o2plus)=32.
	259	count=count+1
	260	endif
	261	if (noms(iq).eq."coplus") then
	262	igcm_coplus=iq
	263	mmol(igcm_coplus)=28.
	264	count=count+1
	265	endif
	266	if (noms(iq).eq."cplus") then
	267	igcm_cplus=iq
	268	mmol(igcm_cplus)=12.
	269	count=count+1
	270	endif
	271	if (noms(iq).eq."nplus") then
	272	igcm_nplus=iq
	273	mmol(igcm_nplus)=14.
	274	count=count+1
	275	endif
	276	if (noms(iq).eq."noplus") then
	277	igcm_noplus=iq
	278	mmol(igcm_noplus)=30.
	279	count=count+1
	280	endif
[324]	281	if (noms(iq).eq."n2plus") then
[171]	282	igcm_n2plus=iq
	283	mmol(igcm_n2plus)=28.
	284	count=count+1
	285	endif
	286	if (noms(iq).eq."hplus") then
	287	igcm_hplus=iq
	288	mmol(igcm_hplus)=1.
	289	count=count+1
	290	endif
[635]	291	if (noms(iq).eq."hco2plus") then
	292	igcm_hco2plus=iq
	293	mmol(igcm_hco2plus)=45.
	294	count=count+1
	295	endif
[171]	296	if (noms(iq).eq."elec") then
	297	igcm_elec=iq
	298	mmol(igcm_elec)=1./1822.89
	299	count=count+1
	300	endif
[38]	301	if (noms(iq).eq."h2o_vap") then
	302	igcm_h2o_vap=iq
	303	mmol(igcm_h2o_vap)=18.
	304	count=count+1
	305	endif
[1617]	306	if (noms(iq).eq."co2_ice") then
	307	igcm_co2_ice=iq
	308	mmol(igcm_co2_ice)=44.
	309	count=count+1
	310	endif
[38]	311	if (noms(iq).eq."h2o_ice") then
	312	igcm_h2o_ice=iq
	313	mmol(igcm_h2o_ice)=18.
	314	count=count+1
	315	endif
	316	! Other stuff: e.g. for simulations using co2 + neutral gaz
	317	if (noms(iq).eq."Ar_N2") then
	318	igcm_ar_n2=iq
	319	mmol(igcm_ar_n2)=30.
	320	count=count+1
	321	endif
[1617]	322	if (microphysco2) then
	323	if (noms(iq).eq."ccnco2_mass") then
	324	igcm_ccnco2_mass=iq
	325	count=count+1
	326	endif
	327	if (noms(iq).eq."ccnco2_number") then
	328	igcm_ccnco2_number=iq
	329	count=count+1
	330	endif
	331	endif
	332	enddo ! of do iq=1,nq
	333
[38]	334	! check that we identified all tracers:
[1036]	335	if (count.ne.nq) then
[38]	336	write(,) "initracer: found only ",count," tracers"
[1036]	337	write(,) " expected ",nq
[38]	338	do iq=1,count
	339	write(,)' ',iq,' ',trim(noms(iq))
	340	enddo
	341	stop
	342	else
	343	write(,) "initracer: found all expected tracers, namely:"
[1036]	344	do iq=1,nq
[38]	345	write(,)' ',iq,' ',trim(noms(iq))
	346	enddo
	347	endif
	348
	349	! if water cycle but iceparty=.false., there will nevertheless be
	350	! water ice at the surface (iceparty is not used anymore, but this
	351	! part is still relevant, as we want to stay compatible with the
	352	! older versions).
	353	if (water.and.(igcm_h2o_ice.eq.0)) then
	354	igcm_h2o_ice=igcm_h2o_vap ! so that qsurf(i_h2o_ice) is identified
	355	! even though there is no q(i_h2o_ice)
	356	else
	357	! surface ice qsurf(i_h2o_ice) was loaded twice by phyetat0,
	358	! as qsurf(i_h2o_vap) & as qsurf(i_h2o_ice), so to be clean:
	359	if (igcm_h2o_vap.ne.0) then
[1036]	360	qsurf(1:ngrid,igcm_h2o_vap)=0
[38]	361	endif
	362	endif
	363
	364	c------------------------------------------------------------
[1036]	365	c Initialize tracers .... (in tracer_mod)
[38]	366	c------------------------------------------------------------
[1005]	367	! start by setting everything to (default) zero
[1036]	368	rho_q(1:nq)=0 ! tracer density (kg.m-3)
	369	radius(1:nq)=0. ! tracer particle radius (m)
	370	alpha_lift(1:nq) =0. ! tracer saltation vertical flux/horiz flux ratio (m-1)
	371	alpha_devil(1:nq)=0. ! tracer lifting coefficient by dust devils
[38]	372
[1005]	373
	374	! some reference values
[38]	375	rho_dust=2500. ! Mars dust density (kg.m-3)
	376	rho_ice=920. ! Water ice density (kg.m-3)
[1685]	377	rho_ice_co2=1650.
	378	!Mangan et al., Icarus 2017 :CO2 density = 1.72391-2.53×10−4T – 2.87×10−6T^2
[38]	379	nuice_ref=0.1 ! Effective variance nueff of the
[358]	380	! water-ice size distribution
[455]	381	!!!nuice_sed=0.45 ! Sedimentation effective variance
[358]	382	! of the water-ice size distribution
[38]	383
	384	if (doubleq) then
	385	c "doubleq" technique
	386	c -------------------
	387	c (transport of mass and number mixing ratio)
	388	c iq=1: Q mass mixing ratio, iq=2: N number mixing ratio
	389
[1036]	390	if( (nq.lt.2).or.(water.and.(nq.lt.4)) ) then
	391	write(,)'initracer: nq is too low : nq=', nq
[38]	392	write(,)'water= ',water,' doubleq= ',doubleq
	393	end if
	394
	395	nueff_lift = 0.5
	396	varian=sqrt(log(1.+nueff_lift))
	397
	398	rho_q(igcm_dust_mass)=rho_dust
	399	rho_q(igcm_dust_number)=rho_dust
	400
	401	c Intermediate calcul for computing geometric mean radius r0
	402	c as a function of mass and number mixing ratio Q and N
	403	c (r0 = (r3n_q * Q/ N)^(1/3))
	404	r3n_q = exp(-4.5varian2)(3./4.)/(pi*rho_dust)
	405
	406	c Intermediate calcul for computing effective radius reff
	407	c from geometric mean radius r0
	408	c (reff = ref_r0 * r0)
	409	ref_r0 = exp(2.5varian*2)
	410
	411	c lifted dust :
	412	c '''''''''''
	413	reff_lift = 3.0e-6 !3.e-6 !Effective radius of lifted dust (m)
	414	alpha_devil(igcm_dust_mass)=9.e-9 ! dust devil lift mass coeff
	415	c alpha_lift(igcm_dust_mass)=3.0e-15 ! Lifted mass coeff
[1455]	416
	417	!! default lifting settings
	418	!! -- GCM: alpha_lift not zero because large-scale lifting by default
	419	!! -- MESOSCALE: alpha_lift zero because no lifting at all in mesoscale by default
	420	#ifdef MESOSCALE
	421	alpha_lift(igcm_dust_mass)=0.0
	422	#else
[38]	423	alpha_lift(igcm_dust_mass)=1.e-6 !1.e-6 !Lifted mass coeff
[1455]	424	#endif
[38]	425
	426	r0_lift = reff_lift/ref_r0
	427	alpha_devil(igcm_dust_number)=r3n_q*
	428	& alpha_devil(igcm_dust_mass)/r0_lift**3
	429	alpha_lift(igcm_dust_number)=r3n_q*
	430	& alpha_lift(igcm_dust_mass)/r0_lift**3
	431
	432	radius(igcm_dust_mass) = reff_lift
	433	radius(igcm_dust_number) = reff_lift
	434
	435	write(,) "initracer: doubleq_param reff_lift:", reff_lift
	436	write(,) "initracer: doubleq_param nueff_lift:", nueff_lift
	437	write(,) "initracer: doubleq_param alpha_lift:",
	438	& alpha_lift(igcm_dust_mass)
	439	else
	440
[648]	441	! initialize varian, which may be used (e.g. by surfacearea)
	442	! even with conrath dust
	443	nueff_lift = 0.5
	444	varian=sqrt(log(1.+nueff_lift))
	445
[38]	446	if (dustbin.gt.1) then
	447	print*,'initracer: STOP!',
	448	$ ' properties of dust need to be set in initracer !!!'
	449	stop
	450
	451	else if (dustbin.eq.1) then
	452
	453	c This will be used for 1 dust particle size:
	454	c ------------------------------------------
	455	radius(igcm_dustbin(1))=3.e-6
	456	alpha_lift(igcm_dustbin(1))=0.0e-6
	457	alpha_devil(igcm_dustbin(1))=7.65e-9
	458	rho_q(igcm_dustbin(1))=rho_dust
	459
	460	endif
	461	end if ! (doubleq)
	462
[358]	463
	464	c Scavenging of dust particles by H2O clouds:
	465	c ------------------------------------------
	466	c Initialize the two tracers used for the CCNs
	467	if (water.AND.doubleq.AND.scavenging) then
	468	radius(igcm_ccn_mass) = radius(igcm_dust_mass)
	469	alpha_lift(igcm_ccn_mass) = 1e-30
	470	alpha_devil(igcm_ccn_mass) = 1e-30
	471	rho_q(igcm_ccn_mass) = rho_dust
	472
	473	radius(igcm_ccn_number) = radius(igcm_ccn_mass)
	474	alpha_lift(igcm_ccn_number) = alpha_lift(igcm_ccn_mass)
	475	alpha_devil(igcm_ccn_number) = alpha_devil(igcm_ccn_mass)
	476	rho_q(igcm_ccn_number) = rho_q(igcm_ccn_mass)
	477	endif ! of if (water.AND.doubleq.AND.scavenging)
	478
[38]	479	c Submicron dust mode:
	480	c --------------------
	481
	482	if (submicron) then
	483	radius(igcm_dust_submicron)=0.1e-6
	484	rho_q(igcm_dust_submicron)=rho_dust
	485	if (doubleq) then
	486	c If doubleq is also active, we use the population ratio:
	487	alpha_lift(igcm_dust_submicron) =
	488	& alpha_lift(igcm_dust_number)popratio
	489	& rho_q(igcm_dust_submicron)4./3.pi*
	490	& radius(igcm_dust_submicron)**3.
	491	alpha_devil(igcm_dust_submicron)=1.e-30
	492	else
	493	alpha_lift(igcm_dust_submicron)=1e-6
	494	alpha_devil(igcm_dust_submicron)=1.e-30
	495	endif ! (doubleq)
	496	end if ! (submicron)
	497
	498	c Initialization for water vapor
	499	c ------------------------------
	500	if(water) then
	501	radius(igcm_h2o_vap)=0.
	502	alpha_lift(igcm_h2o_vap) =0.
	503	alpha_devil(igcm_h2o_vap)=0.
[1036]	504	if(water.and.(nq.ge.2)) then
[38]	505	radius(igcm_h2o_ice)=3.e-6
	506	rho_q(igcm_h2o_ice)=rho_ice
	507	alpha_lift(igcm_h2o_ice) =0.
	508	alpha_devil(igcm_h2o_ice)=0.
[1036]	509	elseif(water.and.(nq.lt.2)) then
	510	write(,) 'nq is too low : nq=', nq
[38]	511	write(,) 'water= ',water
	512	endif
	513
	514	end if ! (water)
[1617]	515
	516	! Initialisation for CO2 clouds
	517	if (co2clouds ) then
	518	radius(igcm_ccnco2_mass) = radius(igcm_dust_mass)
	519	alpha_lift(igcm_ccnco2_mass) = 1e-30
	520	alpha_devil(igcm_ccnco2_mass) = 1e-30
	521	rho_q(igcm_ccnco2_mass) = rho_dust
	522	radius(igcm_ccnco2_number) = radius(igcm_ccnco2_mass)
	523	alpha_lift(igcm_ccnco2_number) = alpha_lift(igcm_ccnco2_mass)
	524	alpha_devil(igcm_ccnco2_number) = alpha_devil(igcm_ccnco2_mass)
	525	rho_q(igcm_ccnco2_number) = rho_q(igcm_ccnco2_mass)
	526
	527	radius(igcm_co2)=0.
	528	alpha_lift(igcm_co2) =0.
	529	alpha_devil(igcm_co2)=0.
[1685]	530	radius(igcm_co2_ice)=1.e-8
[1617]	531	rho_q(igcm_co2_ice)=rho_ice_co2
	532	alpha_lift(igcm_co2_ice) =0.
	533	alpha_devil(igcm_co2_ice)=0.
[38]	534
[1617]	535	endif
	536
[38]	537	c Output for records:
	538	c ~~~~~~~~~~~~~~~~~~
	539	write(,)
	540	Write(,) '******** initracer : dust transport parameters :'
	541	write(,) 'alpha_lift = ', alpha_lift
	542	write(,) 'alpha_devil = ', alpha_devil
	543	write(,) 'radius = ', radius
	544	if(doubleq) then
	545	write(,) 'reff_lift (um) = ', reff_lift
	546	write(,) 'size distribution variance = ', varian
	547	write(,) 'r3n_q , ref_r0 : ', r3n_q , ref_r0
	548	end if
	549
	550	!
	551	! some extra (possibly redundant) sanity checks for tracers:
	552	! ---------------------------------------------------------
	553
	554	if (doubleq) then
	555	! verify that we indeed have dust_mass and dust_number tracers
	556	if (igcm_dust_mass.eq.0) then
	557	write(,) "initracer: error !!"
	558	write(,) " cannot use doubleq option without ",
	559	& "a dust_mass tracer !"
	560	stop
	561	endif
	562	if (igcm_dust_number.eq.0) then
	563	write(,) "initracer: error !!"
	564	write(,) " cannot use doubleq option without ",
	565	& "a dust_number tracer !"
	566	stop
	567	endif
	568	endif
	569
	570	if ((.not.doubleq).and.(dustbin.gt.0)) then
	571	! verify that we indeed have 'dustbin' dust tracers
	572	count=0
	573	do iq=1,dustbin
	574	if (igcm_dustbin(iq).ne.0) then
	575	count=count+1
	576	endif
	577	enddo
	578	if (count.ne.dustbin) then
	579	write(,) "initracer: error !!"
	580	write(,) " dusbin is set to ",dustbin,
	581	& " but we only have the following dust tracers:"
	582	do iq=1,count
	583	write(,)" ",trim(noms(igcm_dustbin(iq)))
	584	enddo
	585	stop
	586	endif
	587	endif
	588
	589	if (water) then
	590	! verify that we indeed have h2o_vap and h2o_ice tracers
	591	if (igcm_h2o_vap.eq.0) then
	592	write(,) "initracer: error !!"
	593	write(,) " cannot use water option without ",
	594	& "an h2o_vap tracer !"
	595	stop
	596	endif
	597	if (igcm_h2o_ice.eq.0) then
	598	write(,) "initracer: error !!"
	599	write(,) " cannot use water option without ",
	600	& "an h2o_ice tracer !"
	601	stop
	602	endif
	603	endif
	604
[1617]	605	if (co2clouds) then
	606	!verify that we have co2_ice and co2 tracers
	607	if (igcm_co2 .eq. 0) then
	608	write(,) "initracer: error !!"
	609	write(,) " cannot use co2 clouds option without ",
	610	& "a co2 tracer !"
	611	stop
	612	endif
	613	if (igcm_co2_ice .eq. 0) then
	614	write(,) "initracer: error !!"
	615	write(,) " cannot use co2 clouds option without ",
	616	& "a co2_ice tracer !"
	617	stop
	618	endif
	619	endif
	620
[1380]	621	if (callnlte) then ! NLTE requirements
	622	if (nltemodel.ge.1) then
	623	! check that co2, co, o and n2 tracers are available
	624	if (igcm_co2.eq.0) then
	625	write(,) "initracer: error !!"
	626	write(,) " with nltemodel>0, we need the co2 tracer!"
	627	stop
	628	endif
	629	if (igcm_co.eq.0) then
	630	write(,) "initracer: error !!"
	631	write(,) " with nltemodel>0, we need the co tracer!"
	632	stop
	633	endif
	634	if (igcm_o.eq.0) then
	635	write(,) "initracer: error !!"
	636	write(,) " with nltemodel>0, we need the o tracer!"
	637	stop
	638	endif
	639	if (igcm_n2.eq.0) then
	640	write(,) "initracer: error !!"
	641	write(,) " with nltemodel>0, we need the n2 tracer!"
	642	stop
	643	endif
	644	endif
	645	endif
	646
[358]	647	if (scavenging) then
	648	! verify that we indeed have ccn_mass and ccn_number tracers
[1617]	649	if (igcm_ccn_mass.eq.0 .and. igcm_ccnco2_mass.eq.0) then
[358]	650	write(,) "initracer: error !!"
	651	write(,) " cannot use scavenging option without ",
[1617]	652	& "a ccn_mass or ccnco2_mass tracer !"
[358]	653	stop
	654	endif
[1617]	655	if (igcm_ccn_number.eq.0 .and. igcm_ccnco2_number.eq.0 ) then
[358]	656	write(,) "initracer: error !!"
	657	write(,) " cannot use scavenging option without ",
[1617]	658	& "a ccn_number or ccnco2_number tracer !"
[358]	659	stop
	660	endif
	661	endif ! of if (scavenging)
	662
[38]	663	if (photochem .or. callthermos) then
	664	! verify that we indeed have the chemistry tracers
	665	if (igcm_co2.eq.0) then
	666	write(,) "initracer: error !!"
	667	write(,) " cannot use chemistry option without ",
	668	& "a co2 tracer !"
	669	stop
	670	endif
	671	if (igcm_co.eq.0) then
	672	write(,) "initracer: error !!"
	673	write(,) " cannot use chemistry option without ",
	674	& "a co tracer !"
	675	stop
	676	endif
	677	if (igcm_o.eq.0) then
	678	write(,) "initracer: error !!"
	679	write(,) " cannot use chemistry option without ",
	680	& "a o tracer !"
	681	stop
	682	endif
	683	if (igcm_o1d.eq.0) then
	684	write(,) "initracer: error !!"
	685	write(,) " cannot use chemistry option without ",
	686	& "a o1d tracer !"
	687	stop
	688	endif
	689	if (igcm_o2.eq.0) then
	690	write(,) "initracer: error !!"
	691	write(,) " cannot use chemistry option without ",
	692	& "an o2 tracer !"
	693	stop
	694	endif
	695	if (igcm_o3.eq.0) then
	696	write(,) "initracer: error !!"
	697	write(,) " cannot use chemistry option without ",
	698	& "an o3 tracer !"
	699	stop
	700	endif
	701	if (igcm_h.eq.0) then
	702	write(,) "initracer: error !!"
	703	write(,) " cannot use chemistry option without ",
	704	& "a h tracer !"
	705	stop
	706	endif
	707	if (igcm_h2.eq.0) then
	708	write(,) "initracer: error !!"
	709	write(,) " cannot use chemistry option without ",
	710	& "a h2 tracer !"
	711	stop
	712	endif
	713	if (igcm_oh.eq.0) then
	714	write(,) "initracer: error !!"
	715	write(,) " cannot use chemistry option without ",
	716	& "an oh tracer !"
	717	stop
	718	endif
	719	if (igcm_ho2.eq.0) then
	720	write(,) "initracer: error !!"
	721	write(,) " cannot use chemistry option without ",
	722	& "a ho2 tracer !"
	723	stop
	724	endif
	725	if (igcm_h2o2.eq.0) then
	726	write(,) "initracer: error !!"
	727	write(,) " cannot use chemistry option without ",
	728	& "a h2o2 tracer !"
	729	stop
	730	endif
	731	if (igcm_n2.eq.0) then
	732	write(,) "initracer: error !!"
	733	write(,) " cannot use chemistry option without ",
	734	& "a n2 tracer !"
	735	stop
	736	endif
	737	if (igcm_ar.eq.0) then
	738	write(,) "initracer: error !!"
	739	write(,) " cannot use chemistry option without ",
	740	& "an ar tracer !"
	741	stop
	742	endif
	743	endif ! of if (photochem .or. callthermos)
	744
	745	end

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