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improvedCO2clouds.F @ 1921

Last change on this file since 1921 was 1921, checked in by emillour, 8 years ago

Mars GCM:
CO2 code update:

nucleaCO2.F: code cleanup and use co2useh2o flag to handle cases where

h2o ccns have to be tracked and accounted for.

co2cloud.F & improvedco2clouds.F: code cleanup and use co2useh2o flag to

control updates on water variables if necessary.

physiq.F : cleanup on outputs & compute mtotco2 and icetotco2

Property svn:executable set to *

File size: 28.8 KB

Line
1	subroutine improvedCO2clouds(ngrid,nlay,microtimestep,
2	& pplay,pplev,pteff,sum_subpdt,
3	& pqeff,sum_subpdq,subpdqcloudco2,subpdtcloudco2,
4	& nq,tauscaling,
5	& memdMMccn,memdMMh2o,memdNNccn)
6	USE comcstfi_h, only: pi, g, cpp
7	USE updaterad, only: updaterice_micro, updaterice_microco2
8	use tracer_mod, only: igcm_dust_mass, igcm_dust_number, rho_dust,
9	& igcm_h2o_ice, igcm_ccn_mass,
10	& igcm_ccn_number, nuice_sed,
11	& igcm_co2, igcm_co2_ice, igcm_ccnco2_mass,
12	& igcm_ccnco2_number, nuiceco2_sed,
13	& rho_ice_co2
14	use conc_mod, only: mmean
15	use datafile_mod, only: datadir
16
17	implicit none
18
19	c------------------------------------------------------------------
20	c This routine is used to form CO2 clouds when a parcel of the GCM is
21	c saturated. It includes the ability to have supersaturation, a
22	c computation of the nucleation rates, growthrates and the
23	c scavenging of dust particles by clouds.
24	c It is worth noting that the amount of dust is computed using the
25	c dust optical depth computed in aeropacity.F. That's why
26	c the variable called "tauscaling" is used to convert
27	c pq(dust_mass) and pq(dust_number), which are relative
28	c quantities, to absolute and realistic quantities stored in zq.
29	c This has to be done to convert the inputs into absolute
30	c values, but also to convert the outputs back into relative
31	c values which are then used by the sedimentation and advection
32	c schemes.
33	c CO2 ice particles can nucleate on both dust and on water ice particles
34	c When CO2 ice is deposited onto a water ice particles, the particle is
35	c removed from the water tracers.
36	c Memory of the origin of the co2 particles is kept and thus the
37	c water cycle shouldn't be modified by this.
38	cWARNING: no sedimentation of the water ice origin is performed
39	c in the microphysical timestep in co2cloud.F.
40
41	c Authors of the water ice clouds microphysics
42	c J.-B. Madeleine, based on the work by Franck Montmessin
43	c (October 2011)
44	c T. Navarro, debug,correction, new scheme (October-April 2011)
45	c A. Spiga, optimization (February 2012)
46	c Adaptation for CO2 clouds by Joachim Audouard (09/16), based on the work
47	c of Constantino Listowski
48	c There is an energy limit to how much co2 can sublimate/condensate. It is
49	c defined by the difference of the GCM temperature with the co2 condensation
50	c temperature.
51	c Warning:
52	c If meteoritic particles are activated and turn into co2 ice particles,
53	c then they will be reversed in the dust tracers if the cloud sublimates
54
55	c------------------------------------------------------------------
56	include "callkeys.h"
57	include "microphys.h"
58	c------------------------------------------------------------------
59	c Arguments:
60
61	INTEGER,INTENT(in) :: ngrid,nlay
62	integer,intent(in) :: nq ! number of tracers
63	REAL,INTENT(in) :: microtimestep ! physics time step (s)
64	REAL,INTENT(in) :: pplay(ngrid,nlay) ! mid-layer pressure (Pa)
65	REAL,INTENT(in) :: pplev(ngrid,nlay+1) ! inter-layer pressure (Pa)
66	REAL,INTENT(in) :: pteff(ngrid,nlay) ! temperature at the middle of the
67	! layers (K)
68	REAL,INTENT(in) :: sum_subpdt(ngrid,nlay) ! tendency on temperature from
69	! previous physical parametrizations
70	REAL,INTENT(in) :: pqeff(ngrid,nlay,nq) ! tracers (kg/kg)
71	REAL,INTENT(in) :: sum_subpdq(ngrid,nlay,nq) ! tendencies on tracers
72	! before condensation (kg/kg.s-1)
73	REAL,INTENT(in) :: tauscaling(ngrid) ! Convertion factor for qdust and Ndust
74	c Outputs:
75	REAL,INTENT(out) :: subpdqcloudco2(ngrid,nlay,nq) ! tendency on tracers
76	! due to CO2 condensation (kg/kg.s-1)
77	! condensation si igcm_co2_ice
78	REAL,INTENT(out) :: subpdtcloudco2(ngrid,nlay) ! tendency on temperature due
79	! to latent heat
80
81	c------------------------------------------------------------------
82	c Local variables:
83	LOGICAL,SAVE :: firstcall=.true.
84	REAL*8 derf ! Error function
85	INTEGER ig,l,i
86
87	real masse (ngrid,nlay) ! Layer mass (kg.m-2)
88	REAL rice(ngrid,nlay) ! Water Ice mass mean radius (m)
89	! used for nucleation of CO2 on ice-coated ccns
90	REAL rccnh2o(ngrid,nlay) ! Water Ice mass mean radius (m)
91	REAL zq(ngrid,nlay,nq) ! local value of tracers
92	REAL zq0(ngrid,nlay,nq) ! local initial value of tracers
93	REAL zt(ngrid,nlay) ! local value of temperature
94	REAL zqsat(ngrid,nlay) ! saturation vapor pressure for CO2
95	real tcond(ngrid,nlay)
96	real zqco2(ngrid,nlay)
97	REAL lw !Latent heat of sublimation (J.kg-1)
98	REAL,save :: l0,l1,l2,l3,l4
99	DOUBLE PRECISION dMice ! mass of condensed ice
100	DOUBLE PRECISION sumcheck
101	DOUBLE PRECISION facteurmax!for energy limit on mass growth
102	DOUBLE PRECISION pco2,psat ! Co2 vapor partial pressure (Pa)
103	DOUBLE PRECISION satu ! Co2 vapor saturation ratio over ice
104	DOUBLE PRECISION Mo,No,No_dust,Mo_dust
105	DOUBLE PRECISION Rn, Rm, dev2,dev3, n_derf, m_derf
106	DOUBLE PRECISION memdMMccn(ngrid,nlay)
107	DOUBLE PRECISION memdMMh2o(ngrid,nlay)
108	DOUBLE PRECISION memdNNccn(ngrid,nlay)
109
110	! Radius used by the microphysical scheme (m)
111	DOUBLE PRECISION n_aer(nbinco2_cld) ! number concentration volume-1 of particle/each size bin
112	DOUBLE PRECISION m_aer(nbinco2_cld) ! mass mixing ratio of particle/each size bin
113	DOUBLE PRECISION m_aer_h2oice2(nbinco2_cld) ! mass mixing ratio of particle/each size bin
114
115	DOUBLE PRECISION n_aer_h2oice(nbinco2_cld) ! Same - for CO2 nucleation
116	DOUBLE PRECISION m_aer_h2oice(nbinco2_cld) ! Same - for CO2 nucleation
117	DOUBLE PRECISION rad_h2oice(nbinco2_cld)
118
119	c REAL*8 sigco2 ! Co2-ice/air surface tension (N.m)
120	c EXTERNAL sigco2
121
122	DOUBLE PRECISION dN,dM, dNh2o, dMh2o, dNN,dMM,dNNh2o,dMMh2o
123	DOUBLE PRECISION dMh2o_ice,dMh2o_ccn
124
125	DOUBLE PRECISION rate(nbinco2_cld) ! nucleation rate
126	DOUBLE PRECISION rateh2o(nbinco2_cld) ! nucleation rate
127	REAL seq
128	DOUBLE PRECISION rho_ice_co2T(ngrid,nlay)
129	DOUBLE PRECISION riceco2(ngrid,nlay) ! CO2Ice mean radius (m)
130	REAL rhocloud(ngrid,nlay) ! Cloud density (kg.m-3)
131
132	REAL rhocloudco2(ngrid,nlay) ! Cloud density (kg.m-3)
133	REAL rdust(ngrid,nlay) ! Dust geometric mean radius (m)
134
135	c REAL res ! Resistance growth
136	DOUBLE PRECISION Ic_rice ! Mass transfer rate CO2 ice crystal
137	DOUBLE PRECISION ratioh2o_ccn
138	DOUBLE PRECISION vo2co2
139
140	c Parameters of the size discretization used by the microphysical scheme
141	DOUBLE PRECISION, PARAMETER :: rmin_cld = 1.e-9 ! Minimum radius (m)
142	DOUBLE PRECISION, PARAMETER :: rmax_cld = 5.e-6 ! Maximum radius (m)
143	DOUBLE PRECISION, PARAMETER :: rbmin_cld =1.e-10 ! Minimum bounary radius (m)
144	DOUBLE PRECISION, PARAMETER :: rbmax_cld = 2.e-4 ! Maximum boundary radius (m)
145	DOUBLE PRECISION vrat_cld ! Volume ratio
146	DOUBLE PRECISION rb_cldco2(nbinco2_cld+1) ! boundary values of each rad_cldco2 bin (m)
147	SAVE rb_cldco2
148	DOUBLE PRECISION dr_cld(nbinco2_cld) ! width of each rad_cldco2 bin (m)
149	DOUBLE PRECISION vol_cld(nbinco2_cld) ! particle volume for each bin (m3)
150
151	DOUBLE PRECISION Proba,Masse_atm,drsurdt,reff,Probah2o
152	REAL sigma_iceco2 ! Variance of the co2 ice and CCN distributions
153	SAVE sigma_iceco2
154	REAL sigma_ice ! Variance of the h2o ice and CCN distributions
155	SAVE sigma_ice
156	DOUBLE PRECISION Niceco2,Qccnco2,Nccnco2
157
158	! Variables for the meteoritic flux:
159	integer,parameter :: nbin_meteor=100
160	integer,parameter :: nlev_meteor=130
161	double precision meteor_ccn(ngrid,nlay,100) !100=nbinco2_cld !!!
162	double precision,save :: meteor(130,100)
163	double precision mtemp(100),pression_meteor(130)
164	logical file_ok
165	integer read_ok
166	integer nelem,lebon1,lebon2
167	double precision :: ltemp1(130),ltemp2(130)
168	integer ibin,j
169	integer,parameter :: uMeteor=666
170
171	IF (firstcall) THEN
172	!=============================================================
173	! 0. Definition of the size grid
174	!=============================================================
175	c rad_cldco2 is the primary radius grid used for microphysics computation.
176	c The grid spacing is computed assuming a constant volume ratio
177	c between two consecutive bins; i.e. vrat_cld.
178	c vrat_cld is determined from the boundary values of the size grid:
179	c rmin_cld and rmax_cld.
180	c The rb_cldco2 array contains the boundary values of each rad_cldco2 bin.
181	c dr_cld is the width of each rad_cldco2 bin.
182
183	vrat_cld = dlog(rmax_cld/rmin_cld) / float(nbinco2_cld-1) *3.
184	vrat_cld = dexp(vrat_cld)
185	rb_cldco2(1) = rbmin_cld
186	rad_cldco2(1) = rmin_cld
187	vol_cld(1) = 4./3. * dble(pi) * rmin_cldrmin_cldrmin_cld
188	do i=1,nbinco2_cld-1
189	rad_cldco2(i+1) = rad_cldco2(i) * vrat_cld**(1./3.)
190	vol_cld(i+1) = vol_cld(i) * vrat_cld
191	enddo
192	do i=1,nbinco2_cld
193	rb_cldco2(i+1)= ( (2.vrat_cld) / (vrat_cld+1.) )(1./3.)
194	& rad_cldco2(i)
195	dr_cld(i) = rb_cldco2(i+1) - rb_cldco2(i)
196	enddo
197	rb_cldco2(nbinco2_cld+1) = rbmax_cld
198	dr_cld(nbinco2_cld) = rb_cldco2(nbinco2_cld+1) -
199	& rb_cldco2(nbinco2_cld)
200	print*, ' '
201	print*,'Microphysics co2: size bin information:'
202	print*,'i,rb_cldco2(i), rad_cldco2(i),dr_cld(i)'
203	print*,'-----------------------------------'
204	do i=1,nbinco2_cld
205	write(*,'(i3,3x,3(e13.6,4x))') i,rb_cldco2(i), rad_cldco2(i),
206	& dr_cld(i)
207	enddo
208	write(*,'(i3,3x,e13.6)') nbinco2_cld+1,rb_cldco2(nbinco2_cld+1)
209	print*,'-----------------------------------'
210	do i=1,nbinco2_cld+1
211	rb_cldco2(i) = dlog(rb_cldco2(i)) !! we save that so that it is not computed
212	!! at each timestep and gridpoint
213	enddo
214	c Contact parameter of co2 ice on dst ( m=cos(theta) )
215	c ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
216	c mteta = 0.952
217	c mtetaco2 = 0.952
218	c write(,) 'co2_param contact parameter:', mtetaco2
219
220	c Volume of a co2 molecule (m3)
221	vo1co2 = m0co2 / dble(rho_ice_co2) ! m0co2 et non mco2
222
223	c Variance of the ice and CCN distributions
224	sigma_iceco2 = sqrt(log(1.+nuiceco2_sed))
225	sigma_ice = sqrt(log(1.+nuice_sed))
226
227
228	write(,) 'Variance of ice & CCN CO2 distribs :', sigma_iceco2
229	write(,) 'nuice for co2 ice sedimentation:', nuiceco2_sed
230	write(,) 'Volume of a co2 molecule:', vo1co2
231
232	if (co2useh2o) then
233	write(,)
234	write(,) "co2useh2o=.true. in callphys.def"
235	write(,) "This means water ice particles can "
236	write(,) "serve as CCN for CO2 microphysics"
237	endif
238
239	if (meteo_flux) then
240	write(,)
241	write(,) "meteo_flux=.true. in callphys.def"
242	write(,) "meteoritic dust particles are available"
243	write(,) "for co2 ice nucleation! "
244	write(,) "Flux given by J. Plane (pressions,size bins)"
245	! Initialisation of the flux: it is constant and is it saved
246	!We must interpolate the table to the GCM pressures
247	INQUIRE(FILE=TRIM(datadir)//
248	& '/Meteo_flux_Plane.dat', EXIST=file_ok)
249	IF (.not. file_ok) THEN
250	write(,) 'file Meteo_flux_Plane.dat should be in '
251	& ,trim(datadir)
252	STOP
253	endif
254	!used Variables
255	open(unit=uMeteor,file=trim(datadir)//
256	& '/Meteo_flux_Plane.dat'
257	& ,FORM='formatted')
258	!13000 records (130 pressions x 100 bin sizes)
259	read(uMeteor,*) !skip 1 line
260	do i=1,130
261	read(uMeteor,*,iostat=read_ok) pression_meteor(i)
262	if (read_ok==0) then
263	write(,) pression_meteor(i)
264	else
265	write(,) 'Error reading Meteo_flux_Plane.dat'
266	call abort_physic("CO2clouds",
267	& "Error reading Meteo_flux_Plane.dat",1)
268	endif
269	enddo
270	read(uMeteor,*) !skip 1 line
271	do i=1,130
272	do j=1,100 ! les mêmes 100 bins size que la distri nuclea: on touche pas
273	read(uMeteor,'(F12.6)',iostat=read_ok) meteor(i,j)
274	if (read_ok/=0) then
275	write(,) 'Error reading Meteo_flux_Plane.dat'
276	call abort_physic("CO2clouds",
277	& "Error reading Meteo_flux_Plane.dat",1)
278	endif
279	enddo
280	!On doit maintenant réinterpoler le tableau(130,100) sur les pressions du GCM (nlay,100)
281	enddo
282	close(uMeteor)
283	write(,) "File meteo_flux read, end of firstcall in co2 micro"
284	endif !of if meteo_flux
285
286	! Parameter values for Latent heat computation
287	l0=595594d0
288	l1=903.111d0
289	l2=-11.5959d0
290	l3=0.0528288d0
291	l4=-0.000103183d0
292	firstcall=.false.
293	END IF
294	!=============================================================
295	! 1. Initialisation
296	!=============================================================
297
298	meteor_ccn(:,:,:)=0.
299	rice(:,:) = 1.e-8
300	riceco2(:,:) = 1.e-11
301
302	c Initialize the tendencies
303	subpdqcloudco2(1:ngrid,1:nlay,1:nq)=0.
304	subpdtcloudco2(1:ngrid,1:nlay)=0.
305
306	c pteff temperature layer; sum_subpdt dT.s-1
307	c pqeff traceur kg/kg; sum_subpdq tendance idem .s-1
308	zt(1:ngrid,1:nlay) =
309	& pteff(1:ngrid,1:nlay) +
310	& sum_subpdt(1:ngrid,1:nlay) * microtimestep
311	zq(1:ngrid,1:nlay,1:nq) =
312	& pqeff(1:ngrid,1:nlay,1:nq) +
313	& sum_subpdq(1:ngrid,1:nlay,1:nq) * microtimestep
314	WHERE( zq(1:ngrid,1:nlay,1:nq) < 1.e-30 )
315	& zq(1:ngrid,1:nlay,1:nq) = 1.e-30
316
317	zq0(1:ngrid,1:nlay,1:nq) = zq(1:ngrid,1:nlay,1:nq)
318	!=============================================================
319	! 2. Compute saturation
320	!=============================================================
321	dev2 = 1. / ( sqrt(2.) * sigma_iceco2 )
322	dev3 = 1. / ( sqrt(2.) * sigma_ice )
323	call co2sat(ngrid*nlay,zt,pplay,zqsat) !zqsat is psat(co2)
324	zqco2=zq(:,:,igcm_co2)+zq(:,:,igcm_co2_ice)
325	CALL tcondco2(ngrid,nlay,pplay,zqco2,tcond)
326	!=============================================================
327	! 3. Bonus: additional meteoritic particles for nucleation
328	!=============================================================
329	if (meteo_flux) then
330	!pression_meteo(130)
331	!pplev(ngrid,nlay+1)
332	!meteo(130,100)
333	!resultat: meteo_ccn(ngrid,nlay,100)
334	do l=1,nlay
335	do ig=1,ngrid
336	masse(ig,l)=(pplev(ig,l) - pplev(ig,l+1)) /g
337	ltemp1=abs(pression_meteor(:)-pplev(ig,l))
338	ltemp2=abs(pression_meteor(:)-pplev(ig,l+1))
339	lebon1=minloc(ltemp1,DIM=1)
340	lebon2=minloc(ltemp2,DIM=1)
341	nelem=lebon2-lebon1+1.
342	mtemp(:)=0d0 !mtemp(100) : valeurs pour les 100bins
343	do ibin=1,100
344	mtemp(ibin)=sum(meteor(lebon1:lebon2,ibin))
345	enddo
346	meteor_ccn(ig,l,:)=mtemp(:)/nelem/masse(ig,l) !Par kg air
347	csi par m carre, x epaisseur/masse pour par kg/air
348	!write(,) "masse air ig l=",masse(ig,l)
349	!check original unit with J. Plane
350	enddo
351	enddo
352	endif
353	c ------------------------------------------------------------------------
354	c --------- Actual microphysics : Main loop over the GCM's grid ---------
355	c ------------------------------------------------------------------------
356	DO l=1,nlay
357	DO ig=1,ngrid
358	c Get the partial pressure of co2 vapor and its saturation ratio
359	pco2 = zq(ig,l,igcm_co2) * (mmean(ig,l)/44.01) * pplay(ig,l)
360	satu = pco2 / zqsat(ig,l)
361
362	rho_ice_co2T(ig,l)=1000.(1.72391-2.53e-4zt(ig,l)
363	& -2.87e-6zt(ig,l)zt(ig,l)) !T-dependant CO2 ice density
364	vo2co2 = m0co2 / dble(rho_ice_co2T(ig,l))
365	rho_ice_co2=rho_ice_co2T(ig,l)
366
367	!=============================================================
368	!4. Nucleation
369	!=============================================================
370	IF ( satu .ge. 1 ) THEN ! if there is condensation
371
372	c We do rdust computation "by hand" because we don't want to
373	c change the mininumum rdust value in updaterad... It would
374	c mess up various part of the GCM !
375
376	rdust(ig,l)= zq(ig,l,igcm_dust_mass)
377	& 0.75/(pirho_dust
378	& * zq(ig,l,igcm_dust_number))
379	rdust(ig,l)= rdust(ig,l)**(1./3.)
380	if (zq(ig,l,igcm_dust_mass)*tauscaling(ig) .le. 1.e-20
381	& .or. zq(ig,l,igcm_dust_number)*tauscaling(ig) .le.1
382	& .or. rdust(ig,l) .le. 1.e-9) then
383	rdust(ig,l)=1.e-9
384	endif
385	rdust(ig,l)=min(5.e-4,rdust(ig,l))
386
387	c Expand the dust moments into a binned distribution
388
389	n_aer(:)=0.
390	m_aer(:)=0.
391
392	Mo = zq(ig,l,igcm_dust_mass)* tauscaling(ig)+1.e-30
393	No = zq(ig,l,igcm_dust_number)* tauscaling(ig)+1.e-30
394
395	No_dust=No
396	Mo_dust=Mo
397
398	Rn = rdust(ig,l)
399	Rn = -dlog(Rn)
400	Rm = Rn - 3. * sigma_iceco2*sigma_iceco2
401	n_derf = derf( (rb_cldco2(1)+Rn) *dev2)
402	m_derf = derf( (rb_cldco2(1)+Rm) *dev2)
403
404	do i = 1, nbinco2_cld
405	n_aer(i) = -0.5 * No * n_derf !! this ith previously computed
406	m_aer(i) = -0.5 * Mo * m_derf !! this ith previously computed
407	n_derf = derf((rb_cldco2(i+1)+Rn) *dev2)
408	m_derf = derf((rb_cldco2(i+1)+Rm) *dev2)
409	n_aer(i) = n_aer(i) + 0.5 * No * n_derf
410	m_aer(i) = m_aer(i) + 0.5 * Mo * m_derf
411	enddo
412
413	c Ajout meteor_ccn particles aux particules de poussière background
414	if (meteo_flux) then
415	do i = 1, nbinco2_cld
416	n_aer(i) = n_aer(i) + meteor_ccn(ig,l,i)
417	m_aer(i) = m_aer(i) + 4./3.pirho_dust
418	& meteor_ccn(ig,l,i)rad_cldco2(i)*rad_cldco2(i)
419	& *rad_cldco2(i)
420	enddo
421	endif
422
423	c Same but with h2o particles as CCN only if co2useh2o=.true.
424
425	n_aer_h2oice(:)=0.
426	m_aer_h2oice(:)=0.
427
428	if (co2useh2o) then
429	call updaterice_micro(zq(ig,l,igcm_h2o_ice),
430	& zq(ig,l,igcm_ccn_mass),zq(ig,l,igcm_ccn_number),
431	& tauscaling(ig),rice(ig,l),rhocloud(ig,l))
432	Mo = zq(ig,l,igcm_h2o_ice) +
433	& zq(ig,l,igcm_ccn_mass)*tauscaling(ig)+1.e-30
434	! Total mass of H20 crystals,CCN included
435	No = zq(ig,l,igcm_ccn_number)* tauscaling(ig) + 1.e-30
436	Rn = rice(ig,l)
437	Rn = -dlog(Rn)
438	Rm = Rn - 3. * sigma_ice*sigma_ice
439	n_derf = derf( (rb_cldco2(1)+Rn) *dev3)
440	m_derf = derf( (rb_cldco2(1)+Rm) *dev3)
441	do i = 1, nbinco2_cld
442	n_aer_h2oice(i) = -0.5 * No * n_derf
443	m_aer_h2oice(i) = -0.5 * Mo * m_derf
444	n_derf = derf( (rb_cldco2(i+1)+Rn) *dev3)
445	m_derf = derf( (rb_cldco2(i+1)+Rm) *dev3)
446	n_aer_h2oice(i) = n_aer_h2oice(i) + 0.5 * No * n_derf
447	m_aer_h2oice(i) = m_aer_h2oice(i) + 0.5 * Mo * m_derf
448	rad_h2oice(i) = rad_cldco2(i)
449	enddo
450	endif
451
452
453	! Call to nucleation routine
454	call nucleaCO2(dble(pco2),zt(ig,l),dble(satu)
455	& ,n_aer,rate,n_aer_h2oice
456	& ,rad_h2oice,rateh2o,vo2co2)
457	dN = 0.
458	dM = 0.
459	dNh2o = 0.
460	dMh2o = 0.
461	do i = 1, nbinco2_cld
462	Proba =1.0-dexp(-1.microtimesteprate(i))
463	dN = dN + n_aer(i) * Proba
464	dM = dM + m_aer(i) * Proba
465	enddo
466	if (co2useh2o) then
467	do i = 1, nbinco2_cld
468	Probah2o = 1.0-dexp(-1.microtimesteprateh2o(i))
469	dNh2o = dNh2o + n_aer_h2oice(i) * Probah2o
470	dMh2o = dMh2o + m_aer_h2oice(i) * Probah2o
471	enddo
472	endif
473
474	! dM masse activée (kg) et dN nb particules par kg d'air
475	! Now increment CCN tracers and update dust tracers
476	dNN= dN/tauscaling(ig)
477	dMM= dM/tauscaling(ig)
478	dNN=min(dNN,zq(ig,l,igcm_dust_number))
479	dMM=min(dMM,zq(ig,l,igcm_dust_mass))
480	zq(ig,l,igcm_ccnco2_mass) =
481	& zq(ig,l,igcm_ccnco2_mass) + dMM
482	zq(ig,l,igcm_ccnco2_number) =
483	& zq(ig,l,igcm_ccnco2_number) + dNN
484	zq(ig,l,igcm_dust_mass)= zq(ig,l,igcm_dust_mass)-dMM
485	zq(ig,l,igcm_dust_number)=zq(ig,l,igcm_dust_number)-dNN
486
487
488	c Update CCN for CO2 nucleating on H2O CCN :
489	! Warning: must keep memory of it
490	if (co2useh2o) then
491	dNNh2o=dNh2o/tauscaling(ig)
492	dNNh2o=min(dNNh2o,zq(ig,l,igcm_ccn_number))
493	ratioh2o_ccn=1./(zq(ig,l,igcm_h2o_ice)
494	& +zq(ig,l,igcm_ccn_mass)*tauscaling(ig))
495	dMh2o_ice=dMh2ozq(ig,l,igcm_h2o_ice)ratioh2o_ccn
496	dMh2o_ccn=dMh2ozq(ig,l,igcm_ccn_mass)
497	& tauscaling(ig)*ratioh2o_ccn
498	dMh2o_ccn=dMh2o_ccn/tauscaling(ig)
499	dMh2o_ccn=min(dMh2o_ccn,zq(ig,l,igcm_ccn_mass))
500	dMh2o_ice=min(dMh2o_ice,zq(ig,l,igcm_h2o_ice))
501	zq(ig,l,igcm_ccnco2_mass) =
502	& zq(ig,l,igcm_ccnco2_mass) + dMh2o_ice+dMh2o_ccn
503	zq(ig,l,igcm_ccnco2_number) =
504	& zq(ig,l,igcm_ccnco2_number) + dNNh2o
505	zq(ig,l,igcm_ccn_number)=zq(ig,l,igcm_ccn_number)-dNNh2o
506	zq(ig,l,igcm_h2o_ice) = zq(ig,l,igcm_h2o_ice)-dMh2o_ice
507	zq(ig,l,igcm_ccn_mass)= zq(ig,l,igcm_ccn_mass)-dMh2o_ccn
508	memdMMh2o(ig,l)=memdMMh2o(ig,l)+dMh2o_ice
509	memdMMccn(ig,l)=memdMMccn(ig,l)+dMh2o_ccn
510	memdNNccn(ig,l)=memdNNccn(ig,l)+dNNh2o
511	endif ! of if co2useh2o
512	ENDIF ! of is satu >1
513
514	!=============================================================
515	! 5. Ice growth: scheme for radius evolution
516	!=============================================================
517
518	c We trigger crystal growth if and only if there is at least one nuclei (N>1).
519	c Indeed, if we are supersaturated and still don't have at least one nuclei, we should better wait
520	c to avoid unrealistic value for nuclei radius and so on for cases that remain negligible.
521	No = zq(ig,l,igcm_ccnco2_number)* tauscaling(ig)+1.e-30
522	IF (No .ge. 1)THEN ! we trigger crystal growth
523	call updaterice_microco2(zq(ig,l,igcm_co2_ice),
524	& zq(ig,l,igcm_ccnco2_mass),zq(ig,l,igcm_ccnco2_number),
525	& tauscaling(ig),riceco2(ig,l),rhocloudco2(ig,l))
526
527	Ic_rice=0.
528	lw = l0 + l1 * zt(ig,l) + l2 * zt(ig,l)**2 +
529	& l3 * zt(ig,l)*3 + l4 zt(ig,l)**4 !J.kg-1
530	facteurmax=abs(Tcond(ig,l)-zt(ig,l))*cpp/lw
531	!specific heat of co2 ice = 1000 J.kg-1.K-1
532	!specific heat of atm cpp = 744.5 J.kg-1.K-1
533
534	c call scheme of microphys. mass growth for CO2
535	call massflowrateCO2(pplay(ig,l),zt(ig,l),
536	& satu,riceco2(ig,l),mmean(ig,l),Ic_rice)
537	c Ic_rice Mass transfer rate (kg/s) for a rice particle >0 si croissance !
538
539	if (isnan(Ic_rice) .or. Ic_rice .eq. 0.) then
540	Ic_rice=0.
541	subpdtcloudco2(ig,l)=-sum_subpdt(ig,l)
542	dMice=0
543
544	else
545	dMice=zq(ig,l,igcm_ccnco2_number)Ic_ricemicrotimestep
546	& *tauscaling(ig) ! Kg par kg d'air, >0 si croissance !
547	!kg.s-1 par particule * nb particule par kg air*s
548	! = kg par kg air
549
550	dMice = max(dMice,max(-facteurmax,-zq(ig,l,igcm_co2_ice)))
551	dMice = min(dMice,min(facteurmax,zq(ig,l,igcm_co2)))
552	! facteurmax maximum quantity of CO2 that can sublime/condense according to available thermal energy
553	! latent heat release >0 if growth i.e. if dMice >0
554	subpdtcloudco2(ig,l)=dMice*lw/cpp/microtimestep
555	! kgco2/kgair* J/kgco2 * 1/(J.kgair-1.K-1)/s= K par seconde
556	!Now update tracers
557	zq(ig,l,igcm_co2_ice) = zq(ig,l,igcm_co2_ice)+dMice
558	zq(ig,l,igcm_co2) = zq(ig,l,igcm_co2)-dMice
559	endif
560
561	!=============================================================
562	! 6. Dust cores releasing if no more co2 ice :
563	!=============================================================
564
565	if (zq(ig,l,igcm_co2_ice).le. 1.e-25)THEN
566	! On sublime tout
567	if (co2useh2o) then
568	if (memdMMccn(ig,l) .gt. 0) then
569	zq(ig,l,igcm_ccn_mass)=zq(ig,l,igcm_ccn_mass)
570	& +memdMMccn(ig,l)
571	endif
572	if (memdMMh2o(ig,l) .gt. 0) then
573	zq(ig,l,igcm_h2o_ice)=zq(ig,l,igcm_h2o_ice)
574	& +memdMMh2o(ig,l)
575	endif
576
577	if (memdNNccn(ig,l) .gt. 0) then
578	zq(ig,l,igcm_ccn_number)=zq(ig,l,igcm_ccn_number)
579	& +memdNNccn(ig,l)
580	endif
581	endif
582	zq(ig,l,igcm_dust_mass) =
583	& zq(ig,l,igcm_dust_mass)
584	& + zq(ig,l,igcm_ccnco2_mass)-
585	& (memdMMh2o(ig,l)+memdMMccn(ig,l))
586	zq(ig,l,igcm_dust_number) =
587	& zq(ig,l,igcm_dust_number)
588	& + zq(ig,l,igcm_ccnco2_number)-memdNNccn(ig,l)
589
590	zq(ig,l,igcm_co2) = zq(ig,l,igcm_co2)
591	& + zq(ig,l,igcm_co2_ice)
592
593	zq(ig,l,igcm_ccnco2_mass)=0.
594	zq(ig,l,igcm_co2_ice)=0.
595	zq(ig,l,igcm_ccnco2_number)=0.
596	memdNNccn(ig,l)=0.
597	memdMMh2o(ig,l)=0.
598	memdMMccn(ig,l)=0.
599	riceco2(ig,l)=0.
600
601	endif !of if co2_ice <1e-25
602
603	ENDIF ! of if NCCN > 1
604	ENDDO ! of ig loop
605	ENDDO ! of nlayer loop
606
607	!=============================================================
608	! 7. END: get cloud tendencies
609	!=============================================================
610
611	! Get cloud tendencies
612	subpdqcloudco2(1:ngrid,1:nlay,igcm_co2) =
613	& (zq(1:ngrid,1:nlay,igcm_co2) -
614	& zq0(1:ngrid,1:nlay,igcm_co2))/microtimestep
615	subpdqcloudco2(1:ngrid,1:nlay,igcm_co2_ice) =
616	& (zq(1:ngrid,1:nlay,igcm_co2_ice) -
617	& zq0(1:ngrid,1:nlay,igcm_co2_ice))/microtimestep
618
619	if (co2useh2o) then
620	subpdqcloudco2(1:ngrid,1:nlay,igcm_h2o_ice) =
621	& (zq(1:ngrid,1:nlay,igcm_h2o_ice) -
622	& zq0(1:ngrid,1:nlay,igcm_h2o_ice))/microtimestep
623	subpdqcloudco2(1:ngrid,1:nlay,igcm_ccn_mass) =
624	& (zq(1:ngrid,1:nlay,igcm_ccn_mass) -
625	& zq0(1:ngrid,1:nlay,igcm_ccn_mass))/microtimestep
626	subpdqcloudco2(1:ngrid,1:nlay,igcm_ccn_number) =
627	& (zq(1:ngrid,1:nlay,igcm_ccn_number) -
628	& zq0(1:ngrid,1:nlay,igcm_ccn_number))/microtimestep
629	endif
630
631	subpdqcloudco2(1:ngrid,1:nlay,igcm_ccnco2_mass) =
632	& (zq(1:ngrid,1:nlay,igcm_ccnco2_mass) -
633	& zq0(1:ngrid,1:nlay,igcm_ccnco2_mass))/microtimestep
634	subpdqcloudco2(1:ngrid,1:nlay,igcm_ccnco2_number) =
635	& (zq(1:ngrid,1:nlay,igcm_ccnco2_number) -
636	& zq0(1:ngrid,1:nlay,igcm_ccnco2_number))/microtimestep
637	subpdqcloudco2(1:ngrid,1:nlay,igcm_dust_mass) =
638	& (zq(1:ngrid,1:nlay,igcm_dust_mass) -
639	& zq0(1:ngrid,1:nlay,igcm_dust_mass))/microtimestep
640	subpdqcloudco2(1:ngrid,1:nlay,igcm_dust_number) =
641	& (zq(1:ngrid,1:nlay,igcm_dust_number) -
642	& zq0(1:ngrid,1:nlay,igcm_dust_number))/microtimestep
643
644
645	end
646
647
648

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