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initracer.F @ 455

Last change on this file since 455 was 455, checked in by tnavarro, 13 years ago
tiny change : nuice_sed initialisation is now done in inifis. Also changed initracer and improvedclouds.
File size: 25.2 KB

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1	SUBROUTINE initracer(qsurf,co2ice)
2
3	IMPLICIT NONE
4	c=======================================================================
5	c subject:
6	c --------
7	c Initialization related to tracer
8	c (transported dust, water, chemical species, ice...)
9	c
10	c Name of the tracer
11	c
12	c Test of dimension :
13	c Initialize COMMON tracer in tracer.h, using tracer names provided
14	c by the dynamics in "advtrac.h"
15	c
16	c Old conventions: (not used any more)
17	c
18	c If water=T : q(iq=nqmx) is the water mass mixing ratio
19	c and q(iq=nqmx-1) is the ice mass mixing ratio
20
21	c If there is transported dust, it uses iq=1 to iq=dustbin
22	c If there is no transported dust : dustbin=0
23	c If doubleq=T : q(iq=1) is the dust mass mixing ratio
24	c q(iq=2) is the dust number mixing ratio
25
26	c If (photochem.or.thermochem) there is "ncomp" chemical species (ncomp
27	c is set in aeronomars/chimiedata.h) using the ncomp iq values starting at
28	c iq=nqchem_min = dustbin+1 (nqchem_min is defined in inifis.F)
29	c
30	c
31	c author: F.Forget
32	c ------
33	c Modifs: Franck Montmessin, Sebastien Lebonnois (june 2003)
34	c Ehouarn Millour (oct. 2008) identify tracers by their names
35	c=======================================================================
36
37
38	#include "dimensions.h"
39	#include "dimphys.h"
40	#include "comcstfi.h"
41	#include "callkeys.h"
42	#include "tracer.h"
43	#include "advtrac.h"
44	#include "comgeomfi.h"
45	#include "chimiedata.h"
46
47	#include "surfdat.h"
48
49	real qsurf(ngridmx,nqmx) ! tracer on surface (e.g. kg.m-2)
50	real co2ice(ngridmx) ! co2 ice mass on surface (e.g. kg.m-2)
51	integer iq,ig,count
52	real r0_lift , reff_lift, nueff_lift
53	c Ratio of small over large dust particles (used when both
54	c doubleq and the submicron mode are active); In Montmessin
55	c et al. (2002), a value of 25 has been deduced;
56	real, parameter :: popratio = 25.
57	logical :: oldnames ! =.true. if old tracer naming convention (q01,...)
58	character(len=20) :: txt ! to store some text
59
60	c-----------------------------------------------------------------------
61	c radius(nqmx) ! aerosol particle radius (m)
62	c rho_q(nqmx) ! tracer densities (kg.m-3)
63	c alpha_lift(nqmx) ! saltation vertical flux/horiz flux ratio (m-1)
64	c alpha_devil(nqmx) ! lifting coeeficient by dust devil
65	c rho_dust ! Mars dust density
66	c rho_ice ! Water ice density
67	c nuice_ref ! Effective variance nueff of the
68	c ! water-ice size distributions
69	c doubleq ! if method with mass (iq=1) and number(iq=2) mixing ratio
70	c varian ! Characteristic variance of log-normal distribution
71	c-----------------------------------------------------------------------
72
73	integer :: nqchem_start
74
75	! Initialization: get tracer names from the dynamics and check if we are
76	! using 'old' tracer convention ('q01',q02',...)
77	! or new convention (full tracer names)
78	! check if tracers have 'old' names
79	oldnames=.false.
80	count=0
81	do iq=1,nqmx
82	txt=" "
83	write(txt,'(a1,i2.2)') 'q',iq
84	if (txt.eq.tnom(iq)) then
85	count=count+1
86	endif
87	enddo ! of do iq=1,nqmx
88
89	if (count.eq.nqmx) then
90	write(,) "initracer: tracers seem to follow old naming ",
91	& "convention (q01,q02,...)"
92	write(,) " => will work for now ... "
93	write(,) " but you should run newstart to rename them"
94	oldnames=.true.
95	endif
96
97	! copy/set tracer names
98	if (oldnames) then ! old names (derived from iq & option values)
99	! 1. dust:
100	if (dustbin.ne.0) then ! transported dust
101	do iq=1,dustbin
102	txt=" "
103	write(txt,'(a4,i2.2)') 'dust',iq
104	noms(iq)=txt
105	mmol(iq)=100.
106	enddo
107	! special case if doubleq
108	if (doubleq) then
109	if (dustbin.ne.2) then
110	write(,) 'initracer: error expected dustbin=2'
111	else
112	! noms(1)='dust_mass' ! dust mass mixing ratio
113	! noms(2)='dust_number' ! dust number mixing ratio
114	! same as above, but avoid explict possible out-of-bounds on array
115	noms(1)='dust_mass' ! dust mass mixing ratio
116	do iq=2,2
117	noms(iq)='dust_number' ! dust number mixing ratio
118	enddo
119	endif
120	endif
121	endif
122	! 2. water & ice
123	if (water) then
124	noms(nqmx)='h2o_vap'
125	mmol(nqmx)=18.
126	! noms(nqmx-1)='h2o_ice'
127	! mmol(nqmx-1)=18.
128	!"loop" to avoid potential out-of-bounds in array
129	do iq=nqmx-1,nqmx-1
130	noms(iq)='h2o_ice'
131	mmol(iq)=18.
132	enddo
133	endif
134	! 3. Chemistry
135	if (photochem .or. callthermos) then
136	if (doubleq) then
137	nqchem_start=3
138	else
139	nqchem_start=dustbin+1
140	end if
141	do iq=nqchem_start,nqchem_start+ncomp-1
142	noms(iq)=nomchem(iq-nqchem_start+1)
143	mmol(iq)=mmolchem(iq-nqchem_start+1)
144	enddo
145	endif ! of if (photochem .or. callthermos)
146	! 4. Other tracers ????
147	if ((dustbin.eq.0).and.(.not.water)) then
148	noms(1)='co2'
149	mmol(1)=44
150	if (nqmx.eq.2) then
151	noms(nqmx)='Ar_N2'
152	mmol(nqmx)=30
153	endif
154	endif
155	else
156	! copy tracer names from dynamics
157	do iq=1,nqmx
158	noms(iq)=tnom(iq)
159	enddo
160	! mmol(:) array is initialized later (see below)
161	endif ! of if (oldnames)
162
163	! special modification when using 'old' tracers:
164	! qsurf(nqmx) was h2o ice whereas q(nqmx) was water vapour
165	! and (if iceparty) q(nqmx-1) was null whereas q(nqmx-1) was water ice
166	if (oldnames.and.water) then
167	write(,)'initracer: moving surface water ice to index ',nqmx-1
168	! "loop" to avoid potential out-of-bounds on arrays
169	do iq=nqmx-1,nqmx-1
170	qsurf(1:ngridmx,iq)=qsurf(1:ngridmx,iq+1)
171	enddo
172	qsurf(1:ngridmx,nqmx)=0
173	endif
174
175	c------------------------------------------------------------
176	c Test Dimensions tracers
177	c------------------------------------------------------------
178
179	! Ehouarn: testing number of tracers is obsolete...
180	! if(photochem.or.thermochem) then
181	! if (water) then
182	! if ((dustbin+ncomp+2).ne.nqmx) then
183	! print*,'initracer: tracer dimension problem:'
184	! print*,"(dustbin+ncomp+2).ne.nqmx"
185	! print*,"ncomp: ",ncomp
186	! print*,"dustbin: ",dustbin
187	! print*,"nqmx: ",nqmx
188	! print*,'Change ncomp in chimiedata.h'
189	! endif
190	! else
191	! if ((dustbin+ncomp+1).ne.nqmx) then
192	! print*,'initracer: tracer dimension problem:'
193	! print*,"(dustbin+ncomp+1).ne.nqmx"
194	! print*,"ncomp: ",ncomp
195	! print*,"dustbin: ",dustbin
196	! print*,"nqmx: ",nqmx
197	! print*,'Change ncomp in chimiedata.h'
198	! STOP
199	! endif
200	! endif
201	! endif
202
203	c------------------------------------------------------------
204	c NAME and molar mass of the tracer
205	c------------------------------------------------------------
206
207
208	! Identify tracers by their names: (and set corresponding values of mmol)
209	! 0. initialize tracer indexes to zero:
210	do iq=1,nqmx
211	igcm_dustbin(iq)=0
212	enddo
213	igcm_dust_mass=0
214	igcm_dust_number=0
215	igcm_ccn_mass=0
216	igcm_ccn_number=0
217	igcm_dust_submicron=0
218	igcm_h2o_vap=0
219	igcm_h2o_ice=0
220	igcm_co2=0
221	igcm_co=0
222	igcm_o=0
223	igcm_o1d=0
224	igcm_o2=0
225	igcm_o3=0
226	igcm_h=0
227	igcm_h2=0
228	igcm_oh=0
229	igcm_ho2=0
230	igcm_h2o2=0
231	igcm_n2=0
232	igcm_ar=0
233	igcm_ar_n2=0
234	igcm_n=0
235	igcm_no=0
236	igcm_no2=0
237	igcm_n2d=0
238	igcm_co2plus=0
239	igcm_oplus=0
240	igcm_o2plus=0
241	igcm_coplus=0
242	igcm_cplus=0
243	igcm_nplus=0
244	igcm_noplus=0
245	igcm_n2plus=0
246	igcm_hplus=0
247	igcm_elec=0
248
249
250	! 1. find dust tracers
251	count=0
252	if (dustbin.gt.0) then
253	do iq=1,nqmx
254	txt=" "
255	write(txt,'(a4,i2.2)')'dust',count+1
256	if (noms(iq).eq.txt) then
257	count=count+1
258	igcm_dustbin(count)=iq
259	mmol(iq)=100.
260	endif
261	enddo !do iq=1,nqmx
262	endif ! of if (dustbin.gt.0)
263	if (doubleq) then
264	do iq=1,nqmx
265	if (noms(iq).eq."dust_mass") then
266	igcm_dust_mass=iq
267	count=count+1
268	endif
269	if (noms(iq).eq."dust_number") then
270	igcm_dust_number=iq
271	count=count+1
272	endif
273	enddo
274	endif ! of if (doubleq)
275	if (scavenging) then
276	do iq=1,nqmx
277	if (noms(iq).eq."ccn_mass") then
278	igcm_ccn_mass=iq
279	count=count+1
280	endif
281	if (noms(iq).eq."ccn_number") then
282	igcm_ccn_number=iq
283	count=count+1
284	endif
285	enddo
286	endif ! of if (scavenging)
287	if (submicron) then
288	do iq=1,nqmx
289	if (noms(iq).eq."dust_submicron") then
290	igcm_dust_submicron=iq
291	mmol(iq)=100.
292	count=count+1
293	endif
294	enddo
295	endif ! of if (submicron)
296	! 2. find chemistry and water tracers
297	do iq=1,nqmx
298	if (noms(iq).eq."co2") then
299	igcm_co2=iq
300	mmol(igcm_co2)=44.
301	count=count+1
302	endif
303	if (noms(iq).eq."co") then
304	igcm_co=iq
305	mmol(igcm_co)=28.
306	count=count+1
307	endif
308	if (noms(iq).eq."o") then
309	igcm_o=iq
310	mmol(igcm_o)=16.
311	count=count+1
312	endif
313	if (noms(iq).eq."o1d") then
314	igcm_o1d=iq
315	mmol(igcm_o1d)=16.
316	count=count+1
317	endif
318	if (noms(iq).eq."o2") then
319	igcm_o2=iq
320	mmol(igcm_o2)=32.
321	count=count+1
322	endif
323	if (noms(iq).eq."o3") then
324	igcm_o3=iq
325	mmol(igcm_o3)=48.
326	count=count+1
327	endif
328	if (noms(iq).eq."h") then
329	igcm_h=iq
330	mmol(igcm_h)=1.
331	count=count+1
332	endif
333	if (noms(iq).eq."h2") then
334	igcm_h2=iq
335	mmol(igcm_h2)=2.
336	count=count+1
337	endif
338	if (noms(iq).eq."oh") then
339	igcm_oh=iq
340	mmol(igcm_oh)=17.
341	count=count+1
342	endif
343	if (noms(iq).eq."ho2") then
344	igcm_ho2=iq
345	mmol(igcm_ho2)=33.
346	count=count+1
347	endif
348	if (noms(iq).eq."h2o2") then
349	igcm_h2o2=iq
350	mmol(igcm_h2o2)=34.
351	count=count+1
352	endif
353	if (noms(iq).eq."n2") then
354	igcm_n2=iq
355	mmol(igcm_n2)=28.
356	count=count+1
357	endif
358	if (noms(iq).eq."ch4") then
359	igcm_ch4=iq
360	mmol(igcm_ch4)=16.
361	count=count+1
362	endif
363	if (noms(iq).eq."ar") then
364	igcm_ar=iq
365	mmol(igcm_ar)=40.
366	count=count+1
367	endif
368	if (noms(iq).eq."n") then
369	igcm_n=iq
370	mmol(igcm_n)=14.
371	count=count+1
372	endif
373	if (noms(iq).eq."no") then
374	igcm_no=iq
375	mmol(igcm_no)=30.
376	count=count+1
377	endif
378	if (noms(iq).eq."no2") then
379	igcm_no2=iq
380	mmol(igcm_no2)=46.
381	count=count+1
382	endif
383	if (noms(iq).eq."n2d") then
384	igcm_n2d=iq
385	mmol(igcm_n2d)=28.
386	count=count+1
387	endif
388	if (noms(iq).eq."co2plus") then
389	igcm_co2plus=iq
390	mmol(igcm_co2plus)=44.
391	count=count+1
392	endif
393	if (noms(iq).eq."oplus") then
394	igcm_oplus=iq
395	mmol(igcm_oplus)=16.
396	count=count+1
397	endif
398	if (noms(iq).eq."o2plus") then
399	igcm_o2plus=iq
400	mmol(igcm_o2plus)=32.
401	count=count+1
402	endif
403	if (noms(iq).eq."coplus") then
404	igcm_coplus=iq
405	mmol(igcm_coplus)=28.
406	count=count+1
407	endif
408	if (noms(iq).eq."cplus") then
409	igcm_cplus=iq
410	mmol(igcm_cplus)=12.
411	count=count+1
412	endif
413	if (noms(iq).eq."nplus") then
414	igcm_nplus=iq
415	mmol(igcm_nplus)=14.
416	count=count+1
417	endif
418	if (noms(iq).eq."noplus") then
419	igcm_noplus=iq
420	mmol(igcm_noplus)=30.
421	count=count+1
422	endif
423	if (noms(iq).eq."n2plus") then
424	igcm_n2plus=iq
425	mmol(igcm_n2plus)=28.
426	count=count+1
427	endif
428	if (noms(iq).eq."hplus") then
429	igcm_hplus=iq
430	mmol(igcm_hplus)=1.
431	count=count+1
432	endif
433	if (noms(iq).eq."elec") then
434	igcm_elec=iq
435	mmol(igcm_elec)=1./1822.89
436	count=count+1
437	endif
438	if (noms(iq).eq."h2o_vap") then
439	igcm_h2o_vap=iq
440	mmol(igcm_h2o_vap)=18.
441	count=count+1
442	endif
443	if (noms(iq).eq."h2o_ice") then
444	igcm_h2o_ice=iq
445	mmol(igcm_h2o_ice)=18.
446	count=count+1
447	endif
448	! Other stuff: e.g. for simulations using co2 + neutral gaz
449	if (noms(iq).eq."Ar_N2") then
450	igcm_ar_n2=iq
451	mmol(igcm_ar_n2)=30.
452	count=count+1
453	endif
454
455
456	enddo ! of do iq=1,nqmx
457	! count=count+nbqchem
458
459	! check that we identified all tracers:
460	if (count.ne.nqmx) then
461	write(,) "initracer: found only ",count," tracers"
462	write(,) " expected ",nqmx
463	do iq=1,count
464	write(,)' ',iq,' ',trim(noms(iq))
465	enddo
466	stop
467	else
468	write(,) "initracer: found all expected tracers, namely:"
469	do iq=1,nqmx
470	write(,)' ',iq,' ',trim(noms(iq))
471	enddo
472	endif
473
474	! if water cycle but iceparty=.false., there will nevertheless be
475	! water ice at the surface (iceparty is not used anymore, but this
476	! part is still relevant, as we want to stay compatible with the
477	! older versions).
478	if (water.and.(igcm_h2o_ice.eq.0)) then
479	igcm_h2o_ice=igcm_h2o_vap ! so that qsurf(i_h2o_ice) is identified
480	! even though there is no q(i_h2o_ice)
481	else
482	! surface ice qsurf(i_h2o_ice) was loaded twice by phyetat0,
483	! as qsurf(i_h2o_vap) & as qsurf(i_h2o_ice), so to be clean:
484	if (igcm_h2o_vap.ne.0) then
485	qsurf(1:ngridmx,igcm_h2o_vap)=0
486	endif
487	endif
488
489	c------------------------------------------------------------
490	c Initialisation tracers ....
491	c------------------------------------------------------------
492	call zerophys(nqmx,rho_q)
493
494	rho_dust=2500. ! Mars dust density (kg.m-3)
495	rho_ice=920. ! Water ice density (kg.m-3)
496	nuice_ref=0.1 ! Effective variance nueff of the
497	! water-ice size distribution
498	!!!nuice_sed=0.45 ! Sedimentation effective variance
499	! of the water-ice size distribution
500
501	if (doubleq) then
502	c "doubleq" technique
503	c -------------------
504	c (transport of mass and number mixing ratio)
505	c iq=1: Q mass mixing ratio, iq=2: N number mixing ratio
506
507	if( (nqmx.lt.2).or.(water.and.(nqmx.lt.4)) ) then
508	write(,)'initracer: nqmx is too low : nqmx=', nqmx
509	write(,)'water= ',water,' doubleq= ',doubleq
510	end if
511
512	nueff_lift = 0.5
513	varian=sqrt(log(1.+nueff_lift))
514
515	rho_q(igcm_dust_mass)=rho_dust
516	rho_q(igcm_dust_number)=rho_dust
517
518	c Intermediate calcul for computing geometric mean radius r0
519	c as a function of mass and number mixing ratio Q and N
520	c (r0 = (r3n_q * Q/ N)^(1/3))
521	r3n_q = exp(-4.5varian2)(3./4.)/(pi*rho_dust)
522
523	c Intermediate calcul for computing effective radius reff
524	c from geometric mean radius r0
525	c (reff = ref_r0 * r0)
526	ref_r0 = exp(2.5varian*2)
527
528	c lifted dust :
529	c '''''''''''
530	reff_lift = 3.0e-6 !3.e-6 !Effective radius of lifted dust (m)
531	alpha_devil(igcm_dust_mass)=9.e-9 ! dust devil lift mass coeff
532	c alpha_lift(igcm_dust_mass)=3.0e-15 ! Lifted mass coeff
533	alpha_lift(igcm_dust_mass)=1.e-6 !1.e-6 !Lifted mass coeff
534
535	r0_lift = reff_lift/ref_r0
536	alpha_devil(igcm_dust_number)=r3n_q*
537	& alpha_devil(igcm_dust_mass)/r0_lift**3
538	alpha_lift(igcm_dust_number)=r3n_q*
539	& alpha_lift(igcm_dust_mass)/r0_lift**3
540
541	radius(igcm_dust_mass) = reff_lift
542	radius(igcm_dust_number) = reff_lift
543
544	write(,) "initracer: doubleq_param reff_lift:", reff_lift
545	write(,) "initracer: doubleq_param nueff_lift:", nueff_lift
546	write(,) "initracer: doubleq_param alpha_lift:",
547	& alpha_lift(igcm_dust_mass)
548	else
549
550	if (dustbin.gt.1) then
551	print*,'initracer: STOP!',
552	$ ' properties of dust need to be set in initracer !!!'
553	stop
554
555	else if (dustbin.eq.1) then
556
557	c This will be used for 1 dust particle size:
558	c ------------------------------------------
559	radius(igcm_dustbin(1))=3.e-6
560	alpha_lift(igcm_dustbin(1))=0.0e-6
561	alpha_devil(igcm_dustbin(1))=7.65e-9
562	rho_q(igcm_dustbin(1))=rho_dust
563
564	endif
565	end if ! (doubleq)
566
567
568	c Scavenging of dust particles by H2O clouds:
569	c ------------------------------------------
570	c Initialize the two tracers used for the CCNs
571	if (water.AND.doubleq.AND.scavenging) then
572	radius(igcm_ccn_mass) = radius(igcm_dust_mass)
573	alpha_lift(igcm_ccn_mass) = 1e-30
574	alpha_devil(igcm_ccn_mass) = 1e-30
575	rho_q(igcm_ccn_mass) = rho_dust
576
577	radius(igcm_ccn_number) = radius(igcm_ccn_mass)
578	alpha_lift(igcm_ccn_number) = alpha_lift(igcm_ccn_mass)
579	alpha_devil(igcm_ccn_number) = alpha_devil(igcm_ccn_mass)
580	rho_q(igcm_ccn_number) = rho_q(igcm_ccn_mass)
581	endif ! of if (water.AND.doubleq.AND.scavenging)
582
583	c Submicron dust mode:
584	c --------------------
585
586	if (submicron) then
587	radius(igcm_dust_submicron)=0.1e-6
588	rho_q(igcm_dust_submicron)=rho_dust
589	if (doubleq) then
590	c If doubleq is also active, we use the population ratio:
591	alpha_lift(igcm_dust_submicron) =
592	& alpha_lift(igcm_dust_number)popratio
593	& rho_q(igcm_dust_submicron)4./3.pi*
594	& radius(igcm_dust_submicron)**3.
595	alpha_devil(igcm_dust_submicron)=1.e-30
596	else
597	alpha_lift(igcm_dust_submicron)=1e-6
598	alpha_devil(igcm_dust_submicron)=1.e-30
599	endif ! (doubleq)
600	end if ! (submicron)
601
602	c Initialization for photochemistry:
603	c ---------------------------------
604	if (photochem) then
605	! initialize chemistry+water (water will be correctly initialized below)
606	! by initializing everything which is not dust ...
607	do iq=1,nqmx
608	txt=noms(iq)
609	if (txt(1:4).ne."dust") then
610	radius(iq)=0.
611	alpha_lift(iq) =0.
612	alpha_devil(iq)=0.
613	endif
614	enddo ! do iq=1,nqmx
615	endif
616
617	c Initialization for water vapor
618	c ------------------------------
619	if(water) then
620	radius(igcm_h2o_vap)=0.
621	alpha_lift(igcm_h2o_vap) =0.
622	alpha_devil(igcm_h2o_vap)=0.
623	if(water.and.(nqmx.ge.2)) then
624	radius(igcm_h2o_ice)=3.e-6
625	rho_q(igcm_h2o_ice)=rho_ice
626	alpha_lift(igcm_h2o_ice) =0.
627	alpha_devil(igcm_h2o_ice)=0.
628	elseif(water.and.(nqmx.lt.2)) then
629	write(,) 'nqmx is too low : nqmx=', nqmx
630	write(,) 'water= ',water
631	endif
632
633	end if ! (water)
634
635	c Output for records:
636	c ~~~~~~~~~~~~~~~~~~
637	write(,)
638	Write(,) '******** initracer : dust transport parameters :'
639	write(,) 'alpha_lift = ', alpha_lift
640	write(,) 'alpha_devil = ', alpha_devil
641	write(,) 'radius = ', radius
642	if(doubleq) then
643	write(,) 'reff_lift (um) = ', reff_lift
644	write(,) 'size distribution variance = ', varian
645	write(,) 'r3n_q , ref_r0 : ', r3n_q , ref_r0
646	end if
647
648	!
649	! some extra (possibly redundant) sanity checks for tracers:
650	! ---------------------------------------------------------
651
652	if (doubleq) then
653	! verify that we indeed have dust_mass and dust_number tracers
654	if (igcm_dust_mass.eq.0) then
655	write(,) "initracer: error !!"
656	write(,) " cannot use doubleq option without ",
657	& "a dust_mass tracer !"
658	stop
659	endif
660	if (igcm_dust_number.eq.0) then
661	write(,) "initracer: error !!"
662	write(,) " cannot use doubleq option without ",
663	& "a dust_number tracer !"
664	stop
665	endif
666	endif
667
668	if ((.not.doubleq).and.(dustbin.gt.0)) then
669	! verify that we indeed have 'dustbin' dust tracers
670	count=0
671	do iq=1,dustbin
672	if (igcm_dustbin(iq).ne.0) then
673	count=count+1
674	endif
675	enddo
676	if (count.ne.dustbin) then
677	write(,) "initracer: error !!"
678	write(,) " dusbin is set to ",dustbin,
679	& " but we only have the following dust tracers:"
680	do iq=1,count
681	write(,)" ",trim(noms(igcm_dustbin(iq)))
682	enddo
683	stop
684	endif
685	endif
686
687	if (water) then
688	! verify that we indeed have h2o_vap and h2o_ice tracers
689	if (igcm_h2o_vap.eq.0) then
690	write(,) "initracer: error !!"
691	write(,) " cannot use water option without ",
692	& "an h2o_vap tracer !"
693	stop
694	endif
695	if (igcm_h2o_ice.eq.0) then
696	write(,) "initracer: error !!"
697	write(,) " cannot use water option without ",
698	& "an h2o_ice tracer !"
699	stop
700	endif
701	endif
702
703	if (scavenging) then
704	! verify that we indeed have ccn_mass and ccn_number tracers
705	if (igcm_ccn_mass.eq.0) then
706	write(,) "initracer: error !!"
707	write(,) " cannot use scavenging option without ",
708	& "a ccn_mass tracer !"
709	stop
710	endif
711	if (igcm_ccn_number.eq.0) then
712	write(,) "initracer: error !!"
713	write(,) " cannot use scavenging option without ",
714	& "a ccn_number tracer !"
715	stop
716	endif
717	endif ! of if (scavenging)
718
719	if (photochem .or. callthermos) then
720	! verify that we indeed have the chemistry tracers
721	if (igcm_co2.eq.0) then
722	write(,) "initracer: error !!"
723	write(,) " cannot use chemistry option without ",
724	& "a co2 tracer !"
725	stop
726	endif
727	if (igcm_co.eq.0) then
728	write(,) "initracer: error !!"
729	write(,) " cannot use chemistry option without ",
730	& "a co tracer !"
731	stop
732	endif
733	if (igcm_o.eq.0) then
734	write(,) "initracer: error !!"
735	write(,) " cannot use chemistry option without ",
736	& "a o tracer !"
737	stop
738	endif
739	if (igcm_o1d.eq.0) then
740	write(,) "initracer: error !!"
741	write(,) " cannot use chemistry option without ",
742	& "a o1d tracer !"
743	stop
744	endif
745	if (igcm_o2.eq.0) then
746	write(,) "initracer: error !!"
747	write(,) " cannot use chemistry option without ",
748	& "an o2 tracer !"
749	stop
750	endif
751	if (igcm_o3.eq.0) then
752	write(,) "initracer: error !!"
753	write(,) " cannot use chemistry option without ",
754	& "an o3 tracer !"
755	stop
756	endif
757	if (igcm_h.eq.0) then
758	write(,) "initracer: error !!"
759	write(,) " cannot use chemistry option without ",
760	& "a h tracer !"
761	stop
762	endif
763	if (igcm_h2.eq.0) then
764	write(,) "initracer: error !!"
765	write(,) " cannot use chemistry option without ",
766	& "a h2 tracer !"
767	stop
768	endif
769	if (igcm_oh.eq.0) then
770	write(,) "initracer: error !!"
771	write(,) " cannot use chemistry option without ",
772	& "an oh tracer !"
773	stop
774	endif
775	if (igcm_ho2.eq.0) then
776	write(,) "initracer: error !!"
777	write(,) " cannot use chemistry option without ",
778	& "a ho2 tracer !"
779	stop
780	endif
781	if (igcm_h2o2.eq.0) then
782	write(,) "initracer: error !!"
783	write(,) " cannot use chemistry option without ",
784	& "a h2o2 tracer !"
785	stop
786	endif
787	if (igcm_n2.eq.0) then
788	write(,) "initracer: error !!"
789	write(,) " cannot use chemistry option without ",
790	& "a n2 tracer !"
791	stop
792	endif
793	if (igcm_ar.eq.0) then
794	write(,) "initracer: error !!"
795	write(,) " cannot use chemistry option without ",
796	& "an ar tracer !"
797	stop
798	endif
799	endif ! of if (photochem .or. callthermos)
800
801	end

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