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improvedCO2clouds.F @ 1918

Last change on this file since 1918 was 1918, checked in by emillour, 7 years ago

Mars GCM:
Code cleanup:

remove "comorbit.h" since it is no longer used.
turn "datafile.h" into module datafile_mod.F90 (and rename variable "datafile" as "datadir" since it stores the path to the datafile directory).

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,flag_pourri
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
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_aer2(nbinco2_cld) ! mass mixing ratio of particle/each size bin
114	DOUBLE PRECISION m_aer_h2oice2(nbinco2_cld) ! mass mixing ratio of particle/each size bin
115
116	DOUBLE PRECISION n_aer_h2oice(nbinco2_cld) ! Same - for CO2 nucleation
117	DOUBLE PRECISION m_aer_h2oice(nbinco2_cld) ! Same - for CO2 nucleation
118	DOUBLE PRECISION rad_h2oice(nbinco2_cld)
119
120	c REAL*8 sigco2 ! Co2-ice/air surface tension (N.m)
121	c EXTERNAL sigco2
122
123	DOUBLE PRECISION dN,dM, dNh2o, dMh2o, dNN,dMM,dNNh2o,dMMh2o
124	DOUBLE PRECISION dMh2o_ice,dMh2o_ccn
125
126	DOUBLE PRECISION rate(nbinco2_cld) ! nucleation rate
127	DOUBLE PRECISION rateh2o(nbinco2_cld) ! nucleation rate
128	REAL seq
129	DOUBLE PRECISION rho_ice_co2T(ngrid,nlay)
130	DOUBLE PRECISION riceco2(ngrid,nlay) ! CO2Ice mean radius (m)
131	REAL rhocloud(ngrid,nlay) ! Cloud density (kg.m-3)
132
133	REAL rhocloudco2(ngrid,nlay) ! Cloud density (kg.m-3)
134	REAL rdust(ngrid,nlay) ! Dust geometric mean radius (m)
135
136	c REAL res ! Resistance growth
137	DOUBLE PRECISION Ic_rice ! Mass transfer rate CO2 ice crystal
138	DOUBLE PRECISION ratioh2o_ccn
139	DOUBLE PRECISION vo2co2
140	c Parameters of the size discretization
141	c used by the microphysical scheme
142	DOUBLE PRECISION, PARAMETER :: rmin_cld = 1.e-9 ! Minimum radius (m)
143	DOUBLE PRECISION, PARAMETER :: rmax_cld = 5.e-6 ! Maximum radius (m)
144	DOUBLE PRECISION, PARAMETER :: rbmin_cld =1.e-10! Minimum bounary radius (m)
145	DOUBLE PRECISION, PARAMETER :: rbmax_cld = 2.e-4 ! Maximum boundary radius (m)
146	DOUBLE PRECISION vrat_cld ! Volume ratio
147	DOUBLE PRECISION rb_cldco2(nbinco2_cld+1) ! boundary values of each rad_cldco2 bin (m)
148	SAVE rb_cldco2
149	DOUBLE PRECISION dr_cld(nbinco2_cld) ! width of each rad_cldco2 bin (m)
150	DOUBLE PRECISION vol_cld(nbinco2_cld) ! particle volume for each bin (m3)
151
152	DOUBLE PRECISION Proba,Masse_atm,drsurdt,reff,Probah2o
153	REAL sigma_iceco2 ! Variance of the co2 ice and CCN distributions
154	SAVE sigma_iceco2
155	REAL sigma_ice ! Variance of the h2o ice and CCN distributions
156	SAVE sigma_ice
157	DOUBLE PRECISION Niceco2,Qccnco2,Nccnco2
158	integer,save :: coeffh2o !will be =0 is co2useh2o=.false.
159	! Variables for the meteoritic flux:
160	integer,parameter :: nbin_meteor=100
161	integer,parameter :: nlev_meteor=130
162	double precision meteor_ccn(ngrid,nlay,100) !100=nbinco2_cld !!!
163	double precision,save :: meteor(130,100)
164	double precision mtemp(100),pression_meteor(130)
165	logical file_ok
166	integer read_ok
167	integer nelem,lebon1,lebon2
168	double precision :: ltemp1(130),ltemp2(130)
169	integer ibin,j
170	integer,parameter :: uMeteor=666
171
172	IF (firstcall) THEN
173	!=============================================================
174	! 0. Definition of the size grid
175	!=============================================================
176	c rad_cldco2 is the primary radius grid used for microphysics computation.
177	c The grid spacing is computed assuming a constant volume ratio
178	c between two consecutive bins; i.e. vrat_cld.
179	c vrat_cld is determined from the boundary values of the size grid:
180	c rmin_cld and rmax_cld.
181	c The rb_cldco2 array contains the boundary values of each rad_cldco2 bin.
182	c dr_cld is the width of each rad_cldco2 bin.
183
184	vrat_cld = dlog(rmax_cld/rmin_cld) / float(nbinco2_cld-1) *3.
185	vrat_cld = dexp(vrat_cld)
186	rb_cldco2(1) = rbmin_cld
187	rad_cldco2(1) = rmin_cld
188	vol_cld(1) = 4./3. * dble(pi) * rmin_cldrmin_cldrmin_cld
189	do i=1,nbinco2_cld-1
190	rad_cldco2(i+1) = rad_cldco2(i) * vrat_cld**(1./3.)
191	vol_cld(i+1) = vol_cld(i) * vrat_cld
192	enddo
193	do i=1,nbinco2_cld
194	rb_cldco2(i+1)= ( (2.vrat_cld) / (vrat_cld+1.) )(1./3.)
195	& rad_cldco2(i)
196	dr_cld(i) = rb_cldco2(i+1) - rb_cldco2(i)
197	enddo
198	rb_cldco2(nbinco2_cld+1) = rbmax_cld
199	dr_cld(nbinco2_cld) = rb_cldco2(nbinco2_cld+1) -
200	& rb_cldco2(nbinco2_cld)
201	print*, ' '
202	print*,'Microphysics co2: size bin information:'
203	print*,'i,rb_cldco2(i), rad_cldco2(i),dr_cld(i)'
204	print*,'-----------------------------------'
205	do i=1,nbinco2_cld
206	write(*,'(i3,3x,3(e13.6,4x))') i,rb_cldco2(i), rad_cldco2(i),
207	& dr_cld(i)
208	enddo
209	write(*,'(i3,3x,e13.6)') nbinco2_cld+1,rb_cldco2(nbinco2_cld+1)
210	print*,'-----------------------------------'
211	do i=1,nbinco2_cld+1
212	rb_cldco2(i) = dlog(rb_cldco2(i)) !! we save that so that it is not computed
213	!! at each timestep and gridpoint
214	enddo
215	c Contact parameter of co2 ice on dst ( m=cos(theta) )
216	c ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
217	c mteta = 0.952
218	c mtetaco2 = 0.952
219	write(,) 'co2_param contact parameter:', mtetaco2
220	c Volume of a co2 molecule (m3)
221	vo1 = m0co2 / dble(rho_ice_co2) ! m0co2 et non mco2
222	c below, vo1 will be recomputed using real rho ice co2 (T-dependant)
223	vo1co2=vo1 ! AJOUT JA
224	c Variance of the ice and CCN distributions
225	sigma_iceco2 = sqrt(log(1.+nuiceco2_sed))
226	sigma_ice = sqrt(log(1.+nuice_sed))
227
228
229	write(,) 'Variance of ice & CCN CO2 distribs :', sigma_iceco2
230	write(,) 'nuice for co2 ice sedimentation:', nuiceco2_sed
231	write(,) 'Volume of a co2 molecule:', vo1co2
232
233	coeffh2o=0
234	if (co2useh2o) then
235	write(,)
236	write(,) "co2useh2o=.true. in callphys.def"
237	write(,) "This means water ice particles can "
238	write(,) "serve as CCN for CO2 microphysics"
239	coeffh2o=1
240	endif
241	if (meteo_flux) then
242	write(,)
243	write(,) "meteo_flux=.true. in callphys.def"
244	write(,) "meteoritic dust particles are available"
245	write(,) "for co2 ice nucleation! "
246	write(,) "Flux given by J. Plane (pressions,size bins)"
247	! Initialisation of the flux: it is constant and is it saved
248	!We must interpolate the table to the GCM pressures
249	INQUIRE(FILE=TRIM(datadir)//
250	& '/Meteo_flux_Plane.dat', EXIST=file_ok)
251	IF (.not. file_ok) THEN
252	write(,) 'file Meteo_flux_Plane.dat should be in '
253	& ,trim(datadir)
254	STOP
255	endif
256	!used Variables
257	! open(newunit=uMeteor,file=trim(datadir)//
258	open(unit=uMeteor,file=trim(datadir)//
259	& '/Meteo_flux_Plane.dat'
260	& ,FORM='formatted')
261	!13000 records (130 pressions x 100 bin sizes)
262	read(uMeteor,*) !skip 1 line
263	do i=1,130
264	read(uMeteor,*,iostat=read_ok) pression_meteor(i)
265	if (read_ok==0) then
266	write(,) pression_meteor(i)
267	else
268	write(,) 'Error reading Meteo_flux_Plane.dat'
269	call abort_physic("CO2clouds",
270	& "Error reading Meteo_flux_Plane.dat",1)
271	endif
272	enddo
273	read(uMeteor,*) !skip 1 line
274	do i=1,130
275	do j=1,100 ! les mêmes 100 bins size que la distri nuclea: on touche pas
276	read(uMeteor,'(F12.6)',iostat=read_ok) meteor(i,j)
277	if (read_ok/=0) then
278	write(,) 'Error reading Meteo_flux_Plane.dat'
279	call abort_physic("CO2clouds",
280	& "Error reading Meteo_flux_Plane.dat",1)
281	endif
282	enddo
283	!On doit maintenant réinterpoler le tableau(130,100) sur les pressions du GCM (nlay,100)
284	enddo
285	close(uMeteor)
286	write(,) "File meteo_flux read, end of firstcall in co2 micro"
287	endif !of if meteo_flux
288
289	! Parameter values for Latent heat computation
290	l0=595594d0
291	l1=903.111d0
292	l2=-11.5959d0
293	l3=0.0528288d0
294	l4=-0.000103183d0
295	firstcall=.false.
296	END IF
297	!=============================================================
298	! 1. Initialisation
299	!=============================================================
300	flag_pourri=0
301	meteor_ccn(:,:,:)=0.
302	rice(:,:) = 1.e-8
303	riceco2(:,:) = 1.e-11
304
305	c Initialize the tendencies
306	subpdqcloudco2(1:ngrid,1:nlay,1:nq)=0.
307	subpdtcloudco2(1:ngrid,1:nlay)=0.
308
309	c pteff temperature layer; sum_subpdt dT.s-1
310	c pqeff traceur kg/kg; sum_subpdq tendance idem .s-1
311	zt(1:ngrid,1:nlay) =
312	& pteff(1:ngrid,1:nlay) +
313	& sum_subpdt(1:ngrid,1:nlay) * microtimestep
314	zq(1:ngrid,1:nlay,1:nq) =
315	& pqeff(1:ngrid,1:nlay,1:nq) +
316	& sum_subpdq(1:ngrid,1:nlay,1:nq) * microtimestep
317	WHERE( zq(1:ngrid,1:nlay,1:nq) < 1.e-30 )
318	& zq(1:ngrid,1:nlay,1:nq) = 1.e-30
319
320	zq0(1:ngrid,1:nlay,1:nq) = zq(1:ngrid,1:nlay,1:nq)
321	!=============================================================
322	! 2. Compute saturation
323	!=============================================================
324	dev2 = 1. / ( sqrt(2.) * sigma_iceco2 )
325	dev3 = 1. / ( sqrt(2.) * sigma_ice )
326	call co2sat(ngrid*nlay,zt,pplay,zqsat) !zqsat is psat(co2)
327	zqco2=zq(:,:,igcm_co2)+zq(:,:,igcm_co2_ice)
328	CALL tcondco2(ngrid,nlay,pplay,zqco2,tcond)
329	!=============================================================
330	! 3. Bonus: additional meteoritic particles for nucleation
331	!=============================================================
332	if (meteo_flux) then
333	!pression_meteo(130)
334	!pplev(ngrid,nlay+1)
335	!meteo(130,100)
336	!resultat: meteo_ccn(ngrid,nlay,100)
337	do l=1,nlay
338	do ig=1,ngrid
339	masse(ig,l)=(pplev(ig,l) - pplev(ig,l+1)) /g
340	ltemp1=abs(pression_meteor(:)-pplev(ig,l))
341	ltemp2=abs(pression_meteor(:)-pplev(ig,l+1))
342	lebon1=minloc(ltemp1,DIM=1)
343	lebon2=minloc(ltemp2,DIM=1)
344	nelem=lebon2-lebon1+1.
345	mtemp(:)=0d0 !mtemp(100) : valeurs pour les 100bins
346	do ibin=1,100
347	mtemp(ibin)=sum(meteor(lebon1:lebon2,ibin))
348	enddo
349	meteor_ccn(ig,l,:)=mtemp(:)/nelem/masse(ig,l) !Par kg air
350	csi par m carre, x epaisseur/masse pour par kg/air
351	!write(,) "masse air ig l=",masse(ig,l)
352	!check original unit with J. Plane
353	enddo
354	enddo
355	endif
356	c ------------------------------------------------------------------------
357	c --------- Actual microphysics : Main loop over the GCM's grid ---------
358	c ------------------------------------------------------------------------
359	DO l=1,nlay
360	DO ig=1,ngrid
361	c Get the partial pressure of co2 vapor and its saturation ratio
362	pco2 = zq(ig,l,igcm_co2) * (mmean(ig,l)/44.01) * pplay(ig,l)
363	satu = pco2 / zqsat(ig,l)
364
365	rho_ice_co2T(ig,l)=1000.(1.72391-2.53e-4zt(ig,l)
366	& -2.87e-6zt(ig,l)zt(ig,l)) !T-dependant CO2 ice density
367	vo2co2 = m0co2 / dble(rho_ice_co2T(ig,l))
368	rho_ice_co2=rho_ice_co2T(ig,l)
369
370	!=============================================================
371	!4. Nucleation
372	!=============================================================
373	IF ( satu .ge. 1 ) THEN ! if there is condensation
374
375	c call updaterccn(zq(ig,l,igcm_dust_mass),
376	c & zq(ig,l,igcm_dust_number),rdust(ig,l),tauscaling(ig))
377
378	!We do rdust computation "by hand" because we don't want to
379	! change the mininumum rdust value in updaterad... It would
380	! mess up various part of the GCM !
381
382	rdust(ig,l)= zq(ig,l,igcm_dust_mass)
383	& *0.75/pi/rho_dust
384	& / zq(ig,l,igcm_dust_number)
385	rdust(ig,l)= rdust(ig,l)**(1./3.)
386	if (zq(ig,l,igcm_dust_mass)*tauscaling(ig) .le. 1.e-20
387	& .or. zq(ig,l,igcm_dust_number)*tauscaling(ig) .le.1
388	& .or. rdust(ig,l) .le. 1.e-9) then
389	rdust(ig,l)=1.e-9
390	endif
391	rdust(ig,l)=min(5.e-4,rdust(ig,l))
392
393	c Expand the dust moments into a binned distribution
394	Mo = zq(ig,l,igcm_dust_mass)* tauscaling(ig)+1.e-30
395	No = zq(ig,l,igcm_dust_number)* tauscaling(ig)+1.e-30
396	Rn = rdust(ig,l)
397	Rn = -dlog(Rn)
398	Rm = Rn - 3. * sigma_iceco2*sigma_iceco2
399	n_derf = derf( (rb_cldco2(1)+Rn) *dev2)
400	m_derf = derf( (rb_cldco2(1)+Rm) *dev2)
401
402	do i = 1, nbinco2_cld
403	n_aer(i) = -0.5 * No * n_derf !! this ith previously computed
404	m_aer(i) = -0.5 * Mo * m_derf !! this ith previously computed
405	n_derf = derf((rb_cldco2(i+1)+Rn) *dev2)
406	m_derf = derf((rb_cldco2(i+1)+Rm) *dev2)
407	n_aer(i) = n_aer(i) + 0.5 * No * n_derf +
408	& meteor_ccn(ig,l,i) !Ajout meteor_ccn particles
409	m_aer(i) = m_aer(i) + 0.5 * Mo * m_derf
410	m_aer2(i)=4./3.pirho_dust
411	& meteor_ccn(ig,l,i)rad_cldco2(i)*rad_cldco2(i)
412	& *rad_cldco2(i)
413	enddo
414	if (meteo_flux) m_aer(:)=m_aer(:)+m_aer2(:)
415
416	!Same but with h2o particles as CCN
417	call updaterice_micro(zq(ig,l,igcm_h2o_ice),
418	& zq(ig,l,igcm_ccn_mass),zq(ig,l,igcm_ccn_number),
419	& tauscaling(ig),rice(ig,l),rhocloud(ig,l))
420	Mo = zq(ig,l,igcm_h2o_ice) +
421	& zq(ig,l,igcm_ccn_mass)tauscaling(ig)+1.e-30!tauscaling(ig)
422	! & + 1.e-30 !Total mass of H20 crystals,CCN included
423	No = zq(ig,l,igcm_ccn_number)* tauscaling(ig) + 1.e-30
424	Rn = rice(ig,l)
425	Rn = -dlog(Rn)
426	Rm = Rn - 3. * sigma_ice*sigma_ice
427	n_derf = derf( (rb_cldco2(1)+Rn) *dev3)
428	m_derf = derf( (rb_cldco2(1)+Rm) *dev3)
429	do i = 1, nbinco2_cld
430	n_aer_h2oice(i) = -0.5 * No * n_derf
431	m_aer_h2oice(i) = -0.5 * Mo * m_derf
432	n_derf = derf( (rb_cldco2(i+1)+Rn) *dev3)
433	m_derf = derf( (rb_cldco2(i+1)+Rm) *dev3)
434	n_aer_h2oice(i) = n_aer_h2oice(i) + 0.5 * No * n_derf
435	m_aer_h2oice(i) = m_aer_h2oice(i) + 0.5 * Mo * m_derf
436	rad_h2oice(i) = rad_cldco2(i)
437	enddo
438	!Call to nucleation routine
439	call nucleaCO2(dble(pco2),zt(ig,l),dble(satu)
440	& ,n_aer,rate,n_aer_h2oice
441	& ,rad_h2oice,rateh2o,vo2co2)
442	dN = 0.
443	dM = 0.
444	dNh2o = 0.
445	dMh2o = 0.
446	do i = 1, nbinco2_cld
447	Proba=1.0-dexp(-1.microtimesteprate(i))
448	Probah2o=coeffh2o*
449	& (1.0-dexp(-1.microtimesteprateh2o(i))) !if co2useh2o=.false., this is =0
450	dNh2o = dNh2o + n_aer_h2oice(i) * Probah2o
451	dMh2o = dMh2o + m_aer_h2oice(i) * Probah2o
452	dN = dN + n_aer(i) * Proba
453	dM = dM + m_aer(i) * Proba
454	enddo
455	! dM masse activée (kg) et dN nb particules par kg d'air
456	! Now increment CCN tracers and update dust tracers
457	dNN= dN/tauscaling(ig)
458	dMM= dM/tauscaling(ig)
459	dNN=min(dNN,zq(ig,l,igcm_dust_number))
460	dMM=min(dMM,zq(ig,l,igcm_dust_mass))
461	zq(ig,l,igcm_ccnco2_mass) =
462	& zq(ig,l,igcm_ccnco2_mass) + dMM
463	zq(ig,l,igcm_ccnco2_number) =
464	& zq(ig,l,igcm_ccnco2_number) + dNN
465	zq(ig,l,igcm_dust_mass)= zq(ig,l,igcm_dust_mass)-dMM
466	zq(ig,l,igcm_dust_number)=zq(ig,l,igcm_dust_number)-dNN
467
468	c Update CCN for CO2 nucleating on H2O CCN :
469	! Warning: must keep memory of it
470	if (co2useh2o) then
471	dNNh2o=dNh2o/tauscaling(ig)
472	dNNh2o=min(dNNh2o,zq(ig,l,igcm_ccn_number))
473	ratioh2o_ccn=1./(zq(ig,l,igcm_h2o_ice)
474	& +zq(ig,l,igcm_ccn_mass)*tauscaling(ig))
475	dMh2o_ice=dMh2ozq(ig,l,igcm_h2o_ice)ratioh2o_ccn
476	dMh2o_ccn=dMh2ozq(ig,l,igcm_ccn_mass)
477	& tauscaling(ig)*ratioh2o_ccn
478	dMh2o_ccn=dMh2o_ccn/tauscaling(ig)
479	dMh2o_ccn=min(dMh2o_ccn,zq(ig,l,igcm_ccn_mass))
480	dMh2o_ice=min(dMh2o_ice,zq(ig,l,igcm_h2o_ice))
481	zq(ig,l,igcm_ccnco2_mass) =
482	& zq(ig,l,igcm_ccnco2_mass) + dMh2o_ice+dMh2o_ccn
483	zq(ig,l,igcm_ccnco2_number) =
484	& zq(ig,l,igcm_ccnco2_number) + dNNh2o
485	zq(ig,l,igcm_ccn_number)=zq(ig,l,igcm_ccn_number)-dNNh2o
486	zq(ig,l,igcm_h2o_ice) = zq(ig,l,igcm_h2o_ice)-dMh2o_ice
487	zq(ig,l,igcm_ccn_mass)= zq(ig,l,igcm_ccn_mass)-dMh2o_ccn
488	memdMMh2o(ig,l)=memdMMh2o(ig,l)+dMh2o_ice
489	memdMMccn(ig,l)=memdMMccn(ig,l)+dMh2o_ccn
490	memdNNccn(ig,l)=memdNNccn(ig,l)+dNNh2o
491	endif !of if co2useh2o
492	ENDIF ! of is satu >1
493	!=============================================================
494	! 4. Ice growth: scheme for radius evolution
495	!=============================================================
496
497	c We trigger crystal growth if and only if there is at least one nuclei (N>1).
498	c Indeed, if we are supersaturated and still don't have at least one nuclei, we should better wait
499	c to avoid unrealistic value for nuclei radius and so on for cases that remain negligible.
500	No = zq(ig,l,igcm_ccnco2_number)* tauscaling(ig)+1.e-30
501	IF (No .ge. 1)THEN ! we trigger crystal growth
502	call updaterice_microco2(zq(ig,l,igcm_co2_ice),
503	& zq(ig,l,igcm_ccnco2_mass),zq(ig,l,igcm_ccnco2_number),
504	& tauscaling(ig),riceco2(ig,l),rhocloudco2(ig,l))
505
506	Ic_rice=0.
507	flag_pourri=0
508	lw = l0 + l1 * zt(ig,l) + l2 * zt(ig,l)**2 +
509	& l3 * zt(ig,l)*3 + l4 zt(ig,l)**4 !J.kg-1
510	facteurmax=abs(Tcond(ig,l)-zt(ig,l))*cpp/lw
511	!specific heat of co2 ice = 1000 J.kg-1.K-1
512	!specific heat of atm cpp = 744.5 J.kg-1.K-1
513
514	ccccccc call scheme of microphys. mass growth for CO2
515	call massflowrateCO2(pplay(ig,l),zt(ig,l),
516	& satu,riceco2(ig,l),mmean(ig,l),Ic_rice)
517	c Ic_rice Mass transfer rate (kg/s) for a rice particle >0 si croissance !
518
519	if (isnan(Ic_rice) .or. Ic_rice .eq. 0.) then
520	Ic_rice=0.
521	flag_pourri=1
522	subpdtcloudco2(ig,l)=-sum_subpdt(ig,l)
523	dMice=0
524
525	else
526	dMice=zq(ig,l,igcm_ccnco2_number)Ic_ricemicrotimestep
527	& *tauscaling(ig) ! Kg par kg d'air, >0 si croissance !
528	!kg.s-1 par particule * nb particule par kg air*s
529	! = kg par kg air
530
531	dMice = max(dMice,max(-facteurmax,-zq(ig,l,igcm_co2_ice)))
532	dMice = min(dMice,min(facteurmax,zq(ig,l,igcm_co2)))
533	!facteurmax maximum quantity of CO2 that can sublime/condense according to available thermal energy
534	! latent heat release >0 if growth i.e. if dMice >0
535	subpdtcloudco2(ig,l)=dMice*lw/cpp/microtimestep
536	! kgco2/kgair* J/kgco2 * 1/(J.kgair-1.K-1)/s= K par seconde
537	!Now update tracers
538	zq(ig,l,igcm_co2_ice) = zq(ig,l,igcm_co2_ice)+dMice
539	zq(ig,l,igcm_co2) = zq(ig,l,igcm_co2)-dMice
540	endif
541
542	!=============================================================
543	! 5. Dust cores releasing if no more co2 ice :
544	!=============================================================
545
546	if (zq(ig,l,igcm_co2_ice).le. 1.e-25)THEN
547	!On sublime tout
548	if (co2useh2o) then
549	if (memdMMccn(ig,l) .gt. 0) then
550	zq(ig,l,igcm_ccn_mass)=zq(ig,l,igcm_ccn_mass)
551	& +memdMMccn(ig,l)
552	endif
553	if (memdMMh2o(ig,l) .gt. 0) then
554	zq(ig,l,igcm_h2o_ice)=zq(ig,l,igcm_h2o_ice)
555	& +memdMMh2o(ig,l)
556	endif
557
558	if (memdNNccn(ig,l) .gt. 0) then
559	zq(ig,l,igcm_ccn_number)=zq(ig,l,igcm_ccn_number)
560	& +memdNNccn(ig,l)
561	endif
562	endif
563	zq(ig,l,igcm_dust_mass) =
564	& zq(ig,l,igcm_dust_mass)
565	& + zq(ig,l,igcm_ccnco2_mass)-
566	& (memdMMh2o(ig,l)+memdMMccn(ig,l))
567	zq(ig,l,igcm_dust_number) =
568	& zq(ig,l,igcm_dust_number)
569	& + zq(ig,l,igcm_ccnco2_number)-memdNNccn(ig,l)
570
571	zq(ig,l,igcm_co2) = zq(ig,l,igcm_co2)
572	& + zq(ig,l,igcm_co2_ice)
573
574	zq(ig,l,igcm_ccnco2_mass)=0.
575	zq(ig,l,igcm_co2_ice)=0.
576	zq(ig,l,igcm_ccnco2_number)=0.
577	memdNNccn(ig,l)=0.
578	memdMMh2o(ig,l)=0.
579	memdMMccn(ig,l)=0.
580	riceco2(ig,l)=0.
581
582	endif !of if co2_ice <1e-25
583
584	ENDIF ! of if NCCN > 1
585	ENDDO ! of ig loop
586	ENDDO ! of nlayer loop
587
588	!=============================================================
589	! 6. END: get cloud tendencies
590	!=============================================================
591
592	! Get cloud tendencies
593	subpdqcloudco2(1:ngrid,1:nlay,igcm_co2) =
594	& (zq(1:ngrid,1:nlay,igcm_co2) -
595	& zq0(1:ngrid,1:nlay,igcm_co2))/microtimestep
596	subpdqcloudco2(1:ngrid,1:nlay,igcm_co2_ice) =
597	& (zq(1:ngrid,1:nlay,igcm_co2_ice) -
598	& zq0(1:ngrid,1:nlay,igcm_co2_ice))/microtimestep
599	subpdqcloudco2(1:ngrid,1:nlay,igcm_h2o_ice) =
600	& (zq(1:ngrid,1:nlay,igcm_h2o_ice) -
601	& zq0(1:ngrid,1:nlay,igcm_h2o_ice))/microtimestep
602	subpdqcloudco2(1:ngrid,1:nlay,igcm_ccn_mass) =
603	& (zq(1:ngrid,1:nlay,igcm_ccn_mass) -
604	& zq0(1:ngrid,1:nlay,igcm_ccn_mass))/microtimestep
605	subpdqcloudco2(1:ngrid,1:nlay,igcm_ccn_number) =
606	& (zq(1:ngrid,1:nlay,igcm_ccn_number) -
607	& zq0(1:ngrid,1:nlay,igcm_ccn_number))/microtimestep
608	subpdqcloudco2(1:ngrid,1:nlay,igcm_ccnco2_mass) =
609	& (zq(1:ngrid,1:nlay,igcm_ccnco2_mass) -
610	& zq0(1:ngrid,1:nlay,igcm_ccnco2_mass))/microtimestep
611	subpdqcloudco2(1:ngrid,1:nlay,igcm_ccnco2_number) =
612	& (zq(1:ngrid,1:nlay,igcm_ccnco2_number) -
613	& zq0(1:ngrid,1:nlay,igcm_ccnco2_number))/microtimestep
614	subpdqcloudco2(1:ngrid,1:nlay,igcm_dust_mass) =
615	& (zq(1:ngrid,1:nlay,igcm_dust_mass) -
616	& zq0(1:ngrid,1:nlay,igcm_dust_mass))/microtimestep
617	subpdqcloudco2(1:ngrid,1:nlay,igcm_dust_number) =
618	& (zq(1:ngrid,1:nlay,igcm_dust_number) -
619	& zq0(1:ngrid,1:nlay,igcm_dust_number))/microtimestep
620
621	end
622
623
624

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