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watercloud_mod.F @ 2083

Last change on this file since 2083 was 1996, checked in by emillour, 6 years ago

Mars physics:

Turn watersat into a module.

CO2 cloud updates:

compute co2 condensation tendencies in the co2 cloud scheme and pass them on to vdifc (for tests; they might not be needed) and adapt newcondens.

DB+EM

File size: 23.6 KB

Line
1	MODULE watercloud_mod
2
3	IMPLICIT NONE
4
5	CONTAINS
6
7	SUBROUTINE watercloud(ngrid,nlay,ptimestep,
8	& pplev,pplay,pdpsrf,pzlay,pt,pdt,
9	& pq,pdq,pdqcloud,pdtcloud,
10	& nq,tau,tauscaling,rdust,rice,nuice,
11	& rsedcloud,rhocloud,totcloudfrac)
12	USE ioipsl_getincom, ONLY: getin
13	USE updaterad, ONLY: updaterdust, updaterice_micro,
14	& updaterice_typ
15	USE improvedclouds_mod, ONLY: improvedclouds
16	USE watersat_mod, ONLY: watersat
17	use tracer_mod, only: nqmx, igcm_h2o_vap, igcm_h2o_ice,
18	& igcm_dust_mass, igcm_dust_number,
19	& igcm_ccn_mass, igcm_ccn_number,
20	& rho_dust, nuice_sed, nuice_ref
21	use dimradmars_mod, only: naerkind
22	IMPLICIT NONE
23
24
25	c=======================================================================
26	c Water-ice cloud formation
27	c
28	c Includes two different schemes:
29	c - A simplified scheme (see simpleclouds.F)
30	c - An improved microphysical scheme (see improvedclouds.F)
31	c
32	c There is a time loop specific to cloud formation
33	c due to timescales smaller than the GCM integration timestep.
34	c
35	c Authors: Franck Montmessin, Francois Forget, Ehouarn Millour,
36	c J.-B. Madeleine, Thomas Navarro
37	c
38	c 2004 - 2012
39	c=======================================================================
40
41	c-----------------------------------------------------------------------
42	c declarations:
43	c -------------
44
45	include "callkeys.h"
46
47	c Inputs/outputs:
48	c ------
49
50	INTEGER, INTENT(IN) :: ngrid,nlay
51	INTEGER, INTENT(IN) :: nq ! nombre de traceurs
52	REAL, INTENT(IN) :: ptimestep ! pas de temps physique (s)
53	REAL, INTENT(IN) :: pplev(ngrid,nlay+1) ! pression aux inter-couches (Pa)
54	REAL, INTENT(IN) :: pplay(ngrid,nlay) ! pression au milieu des couches (Pa)
55	REAL, INTENT(IN) :: pdpsrf(ngrid) ! tendence surf pressure
56	REAL, INTENT(IN) :: pzlay(ngrid,nlay) ! altitude at the middle of the layers
57	REAL, INTENT(IN) :: pt(ngrid,nlay) ! temperature at the middle of the layers (K)
58	REAL, INTENT(IN) :: pdt(ngrid,nlay) ! tendence temperature des autres param.
59
60	REAL, INTENT(IN) :: pq(ngrid,nlay,nq) ! traceur (kg/kg)
61	rEAL, INTENT(IN) :: pdq(ngrid,nlay,nq) ! tendence avant condensation (kg/kg.s-1)
62
63	REAL, INTENT(IN) :: tau(ngrid,naerkind) ! Column dust optical depth at each point
64	REAL, INTENT(IN) :: tauscaling(ngrid) ! Convertion factor for dust amount
65	REAL, INTENT(INOUT) :: rdust(ngrid,nlay) ! Dust geometric mean radius (m)
66
67	REAL, INTENT(OUT) :: pdqcloud(ngrid,nlay,nq) ! tendence de la condensation H2O(kg/kg.s-1)
68	REAL, INTENT(OUT) :: pdtcloud(ngrid,nlay) ! tendence temperature due
69	! a la chaleur latente
70	REAL, INTENT(INOUT) :: rice(ngrid,nlay) ! Ice mass mean radius (m)
71	! (r_c in montmessin_2004)
72	REAL, INTENT(OUT) :: nuice(ngrid,nlay) ! Estimated effective variance
73	! of the size distribution
74	REAL, INTENT(OUT) :: rsedcloud(ngrid,nlay) ! Cloud sedimentation radius
75	REAL, INTENT(OUT) :: rhocloud(ngrid,nlay) ! Cloud density (kg.m-3)
76
77	REAL, INTENT(INOUT):: totcloudfrac(ngrid) ! Cloud fraction (A. Pottier 2013)
78
79	c Locals:
80	c ------
81
82	! for ice radius computation
83	REAL Mo,No
84	REAl ccntyp
85
86	! for time loop
87	INTEGER microstep ! time subsampling step variable
88	INTEGER,SAVE :: imicro ! time subsampling for coupled water microphysics & sedimentation
89	REAL,SAVE :: microtimestep ! integration timestep for coupled water microphysics & sedimentation
90	REAL,SAVE :: microtimestep_prev=-999
91
92	! tendency given by clouds (inside the micro loop)
93	REAL subpdqcloud(ngrid,nlay,nq) ! cf. pdqcloud
94	REAL subpdtcloud(ngrid,nlay) ! cf. pdtcloud
95
96	! global tendency (clouds+physics)
97	REAL sum_subpdq(ngrid,nlay,nq) ! cf. pdqcloud
98	REAL sum_subpdt(ngrid,nlay) ! cf. pdtcloud
99
100	! no supersaturation when option supersat is false
101	REAL zt(ngrid,nlay) ! local value of temperature
102	REAL zqsat(ngrid,nlay) ! saturation
103
104	INTEGER iq,ig,l
105	LOGICAL,SAVE :: firstcall=.true.
106
107	! Representation of sub-grid water ice clouds A. Pottier 2013
108	REAL :: ztclf(ngrid, nlay)
109	REAL :: zqclf(ngrid, nlay,nq)
110	REAL :: zdelt
111	REAL :: norm
112	REAL :: ponder
113	REAL :: tcond(ngrid,nlay)
114	REAL :: zqvap(ngrid,nlay)
115	REAL :: zqice(ngrid,nlay)
116	REAL :: spant ! delta T for the temperature distribution
117	! REAL :: zqsat(ngrid,nlay) ! saturation
118	REAL :: pteff(ngrid, nlay)! effective temperature in the cloud,neb
119	REAL :: pqeff(ngrid, nlay, nq)! effective tracers quantities in the cloud
120	REAL :: cloudfrac(ngrid,nlay) ! cloud fraction
121	REAL :: mincloud ! min cloud frac
122	LOGICAL, save :: flagcloud=.true.
123	c ** un petit test de coherence
124	c --------------------------
125
126	IF (firstcall) THEN
127
128	if (nq.gt.nqmx) then
129	write(,) 'stop in watercloud (nq.gt.nqmx)!'
130	write(,) 'nq=',nq,' nqmx=',nqmx
131	stop
132	endif
133
134	write(,) "watercloud: igcm_h2o_vap=",igcm_h2o_vap
135	write(,) " igcm_h2o_ice=",igcm_h2o_ice
136
137	write(,) "time subsampling for microphysic ?"
138	#ifdef MESOSCALE
139	imicro = 2
140	#else
141	imicro = 30
142	#endif
143	call getin("imicro",imicro)
144	write(,)"watercloud: imicro = ",imicro
145
146	firstcall=.false.
147	ENDIF ! of IF (firstcall)
148
149	!! AS: moved out of firstcall to allow nesting+evoluting timestep
150	!! TBD: consider possible diff imicro with domains?
151	microtimestep = ptimestep/real(imicro)
152	if (microtimestep/=microtimestep_prev) then
153	! only tell the world if microtimestep has changed
154	write(,)"watercloud: Physical timestep is ",ptimestep
155	write(,)"watercloud: Microphysics timestep is ",microtimestep
156	microtimestep_prev=microtimestep
157	endif
158
159	c-----Initialization
160	sum_subpdq(1:ngrid,1:nlay,1:nq) = 0
161	sum_subpdt(1:ngrid,1:nlay) = 0
162
163	! default value if no ice
164	rhocloud(1:ngrid,1:nlay) = rho_dust
165
166	c-------------------------------------------------------------------
167	c 0. Representation of sub-grid water ice clouds
168	c------------------
169	c-----Initialization
170	pteff(1:ngrid,1:nlay) = 0
171	pqeff(1:ngrid,1:nlay,1:nq) = 0
172	DO l=1,nlay
173	DO ig=1,ngrid
174	pteff(ig,l)=pt(ig,l)
175	END DO
176	END DO
177	DO l=1,nlay
178	DO ig=1,ngrid
179	DO iq=1,nq
180	pqeff(ig,l,iq)=pq(ig,l,iq)
181	ENDDO
182	ENDDO
183	ENDDO
184	c-----Tendencies
185	DO l=1,nlay
186	DO ig=1,ngrid
187	ztclf(ig,l)=pt(ig,l)+ pdt(ig,l)*ptimestep
188	ENDDO
189	ENDDO
190	DO l=1,nlay
191	DO ig=1,ngrid
192	DO iq=1,nq
193	zqclf(ig,l,iq)=pq(ig,l,iq)+pdq(ig,l,iq)*ptimestep
194	ENDDO
195	ENDDO
196	ENDDO
197	c-----Effective temperature calculation
198	IF (CLFvarying) THEN
199	spant=3.0 ! delta T for the temprature distribution
200	mincloud=0.1 ! min cloudfrac when there is ice
201	IF (flagcloud) THEN
202	write(,) "Delta T", spant
203	write(,) "mincloud", mincloud
204	flagcloud=.false.
205	END IF
206	!CALL watersat(ngrid*nlay,ztclf,pplay,zqsat) !MV17: we dont need zqsat in the CLFvarying scheme
207	zqvap=zqclf(:,:,igcm_h2o_vap)
208	zqice=zqclf(:,:,igcm_h2o_ice)
209	CALL tcondwater(ngrid*nlay,pplay,zqvap+zqice,tcond)
210	DO l=1,nlay
211	DO ig=1,ngrid
212	zdelt=spant !MAX(spant*ztclf(ig,l),1.e-12), now totally in K. Fixed width
213	IF (tcond(ig,l) .ge. (ztclf(ig,l)+zdelt)) THEN
214	pteff(ig,l)=ztclf(ig,l)
215	cloudfrac(ig,l)=1.
216	ELSE IF (tcond(ig,l) .le. (ztclf(ig,l)-zdelt)) THEN
217	pteff(ig,l)=ztclf(ig,l)-zdelt
218	cloudfrac(ig,l)=mincloud
219	ELSE
220	cloudfrac(ig,l)=(tcond(ig,l)-ztclf(ig,l)+zdelt)/
221	& (2.0*zdelt)
222	pteff(ig,l)=(tcond(ig,l)+ztclf(ig,l)-zdelt)/2.
223	END IF
224	pteff(ig,l)=pteff(ig,l)-pdt(ig,l)*ptimestep
225	IF (cloudfrac(ig,l).le.mincloud) THEN !MV17: replaced .le.0 by .le.mincloud
226	cloudfrac(ig,l)=mincloud
227	ELSE IF (cloudfrac(ig,l).gt.1) THEN
228	cloudfrac(ig,l)=1.
229	END IF
230	ENDDO
231	ENDDO
232	c-----Calculation of the total cloud coverage of the column
233	DO ig=1,ngrid
234	totcloudfrac(ig) = 0.
235	norm=0.
236	DO l=1,nlay
237	ponder=zqice(ig,l)*(pplev(ig,l) - pplev(ig,l+1))
238	totcloudfrac(ig) = totcloudfrac(ig)
239	& + cloudfrac(ig,l)*ponder
240	norm=norm+ponder
241	ENDDO
242	totcloudfrac(ig)=MAX(totcloudfrac(ig)/norm,1.e-12) ! min value if NaNs
243	ENDDO
244	c-----Effective tracers quantities in the cloud fraction
245	IF (microphys) THEN
246	pqeff(:,:,igcm_ccn_mass)=pq(:,:,igcm_ccn_mass)/
247	& cloudfrac(:,:)
248	pqeff(:,:,igcm_ccn_number)=pq(:,:,igcm_ccn_number)/
249	& cloudfrac(:,:)
250	END IF ! end if (microphys)
251	pqeff(:,:,igcm_h2o_ice)=pq(:,:,igcm_h2o_ice)/
252	& cloudfrac(:,:)
253	!! CLFvarying outputs
254	CALL WRITEDIAGFI(ngrid,'pqeffice','pqeffice',
255	& 'kg/kg',3,pqeff(:,:,igcm_h2o_ice))
256	CALL WRITEDIAGFI(ngrid,'pteff','pteff',
257	& 'K',3,pteff(:,:))
258	CALL WRITEDIAGFI(ngrid,'tcond','tcond',
259	& 'K',3,tcond(:,:))
260	CALL WRITEDIAGFI(ngrid,'cloudfrac','cloudfrac',
261	& 'K',3,cloudfrac(:,:))
262	END IF ! end if (CLFvarying)
263	c------------------------------------------------------------------
264	c Time subsampling for microphysics
265	c------------------------------------------------------------------
266	rhocloud(1:ngrid,1:nlay) = rho_dust
267	DO microstep=1,imicro
268
269	c-------------------------------------------------------------------
270	c 1. Tendencies:
271	c------------------
272
273
274	c------ Temperature tendency subpdt
275	! Each microtimestep we give the cloud scheme a stepped entry subpdt instead of pdt
276	! If imicro=1 subpdt is the same as pdt
277	DO l=1,nlay
278	DO ig=1,ngrid
279	sum_subpdt(ig,l) = sum_subpdt(ig,l)
280	& + pdt(ig,l) ! At each micro timestep we add pdt in order to have a stepped entry
281	ENDDO
282	ENDDO
283	c------ Tracers tendencies subpdq are additionned
284	c------ At each micro timestep we add pdq in order to have a stepped entry
285	IF (microphys) THEN
286	DO l=1,nlay
287	DO ig=1,ngrid
288	sum_subpdq(ig,l,igcm_dust_mass) =
289	& sum_subpdq(ig,l,igcm_dust_mass)
290	& + pdq(ig,l,igcm_dust_mass)
291	sum_subpdq(ig,l,igcm_dust_number) =
292	& sum_subpdq(ig,l,igcm_dust_number)
293	& + pdq(ig,l,igcm_dust_number)
294	sum_subpdq(ig,l,igcm_ccn_mass) =
295	& sum_subpdq(ig,l,igcm_ccn_mass)
296	& + pdq(ig,l,igcm_ccn_mass)
297	sum_subpdq(ig,l,igcm_ccn_number) =
298	& sum_subpdq(ig,l,igcm_ccn_number)
299	& + pdq(ig,l,igcm_ccn_number)
300	ENDDO
301	ENDDO
302	ENDIF
303	DO l=1,nlay
304	DO ig=1,ngrid
305	sum_subpdq(ig,l,igcm_h2o_ice) =
306	& sum_subpdq(ig,l,igcm_h2o_ice)
307	& + pdq(ig,l,igcm_h2o_ice)
308	sum_subpdq(ig,l,igcm_h2o_vap) =
309	& sum_subpdq(ig,l,igcm_h2o_vap)
310	& + pdq(ig,l,igcm_h2o_vap)
311	ENDDO
312	ENDDO
313
314	c-------------------------------------------------------------------
315	c 2. Main call to the different cloud schemes:
316	c------------------------------------------------
317	IF (microphys) THEN
318	CALL improvedclouds(ngrid,nlay,microtimestep,
319	& pplay,pteff,sum_subpdt,
320	& pqeff,sum_subpdq,subpdqcloud,subpdtcloud,
321	& nq,tauscaling)
322
323	ELSE
324	CALL simpleclouds(ngrid,nlay,microtimestep,
325	& pplay,pzlay,pteff,sum_subpdt,
326	& pqeff,sum_subpdq,subpdqcloud,subpdtcloud,
327	& nq,tau,rice)
328	ENDIF
329
330	c-------------------------------------------------------------------
331	c 3. Updating tendencies after cloud scheme:
332	c-----------------------------------------------
333
334	IF (microphys) THEN
335	DO l=1,nlay
336	DO ig=1,ngrid
337	sum_subpdq(ig,l,igcm_dust_mass) =
338	& sum_subpdq(ig,l,igcm_dust_mass)
339	& + subpdqcloud(ig,l,igcm_dust_mass)
340	sum_subpdq(ig,l,igcm_dust_number) =
341	& sum_subpdq(ig,l,igcm_dust_number)
342	& + subpdqcloud(ig,l,igcm_dust_number)
343	sum_subpdq(ig,l,igcm_ccn_mass) =
344	& sum_subpdq(ig,l,igcm_ccn_mass)
345	& + subpdqcloud(ig,l,igcm_ccn_mass)
346	sum_subpdq(ig,l,igcm_ccn_number) =
347	& sum_subpdq(ig,l,igcm_ccn_number)
348	& + subpdqcloud(ig,l,igcm_ccn_number)
349	ENDDO
350	ENDDO
351	ENDIF
352	DO l=1,nlay
353	DO ig=1,ngrid
354	sum_subpdq(ig,l,igcm_h2o_ice) =
355	& sum_subpdq(ig,l,igcm_h2o_ice)
356	& + subpdqcloud(ig,l,igcm_h2o_ice)
357	sum_subpdq(ig,l,igcm_h2o_vap) =
358	& sum_subpdq(ig,l,igcm_h2o_vap)
359	& + subpdqcloud(ig,l,igcm_h2o_vap)
360	ENDDO
361	ENDDO
362
363	IF (activice) THEN
364	DO l=1,nlay
365	DO ig=1,ngrid
366	sum_subpdt(ig,l) =
367	& sum_subpdt(ig,l) + subpdtcloud(ig,l)
368	ENDDO
369	ENDDO
370	ENDIF
371
372
373	ENDDO ! of DO microstep=1,imicro
374
375	c-------------------------------------------------------------------
376	c 6. Compute final tendencies after time loop:
377	c------------------------------------------------
378
379	c------ Temperature tendency pdtcloud
380	DO l=1,nlay
381	DO ig=1,ngrid
382	pdtcloud(ig,l) =
383	& sum_subpdt(ig,l)/real(imicro)-pdt(ig,l)
384	ENDDO
385	ENDDO
386
387	c------ Tracers tendencies pdqcloud
388	DO l=1,nlay
389	DO ig=1,ngrid
390	pdqcloud(ig,l,igcm_h2o_ice) =
391	& sum_subpdq(ig,l,igcm_h2o_ice)/real(imicro)
392	& - pdq(ig,l,igcm_h2o_ice)
393	pdqcloud(ig,l,igcm_h2o_vap) =
394	& sum_subpdq(ig,l,igcm_h2o_vap)/real(imicro)
395	& - pdq(ig,l,igcm_h2o_vap)
396	ENDDO
397	ENDDO
398
399	IF(microphys) THEN
400	DO l=1,nlay
401	DO ig=1,ngrid
402	pdqcloud(ig,l,igcm_ccn_mass) =
403	& sum_subpdq(ig,l,igcm_ccn_mass)/real(imicro)
404	& - pdq(ig,l,igcm_ccn_mass)
405	pdqcloud(ig,l,igcm_ccn_number) =
406	& sum_subpdq(ig,l,igcm_ccn_number)/real(imicro)
407	& - pdq(ig,l,igcm_ccn_number)
408	ENDDO
409	ENDDO
410	ENDIF
411
412	IF(scavenging) THEN
413	DO l=1,nlay
414	DO ig=1,ngrid
415	pdqcloud(ig,l,igcm_dust_mass) =
416	& sum_subpdq(ig,l,igcm_dust_mass)/real(imicro)
417	& - pdq(ig,l,igcm_dust_mass)
418	pdqcloud(ig,l,igcm_dust_number) =
419	& sum_subpdq(ig,l,igcm_dust_number)/real(imicro)
420	& - pdq(ig,l,igcm_dust_number)
421	ENDDO
422	ENDDO
423	ENDIF
424
425	c------- Due to stepped entry, other processes tendencies can add up to negative values
426	c------- Therefore, enforce positive values and conserve mass
427	IF(microphys) THEN
428	DO l=1,nlay
429	DO ig=1,ngrid
430	IF ((pq(ig,l,igcm_ccn_number) +
431	& ptimestep* (pdq(ig,l,igcm_ccn_number) +
432	& pdqcloud(ig,l,igcm_ccn_number)) .le. 1.)
433	& .or. (pq(ig,l,igcm_ccn_mass) +
434	& ptimestep* (pdq(ig,l,igcm_ccn_mass) +
435	& pdqcloud(ig,l,igcm_ccn_mass)) .le. 1.e-20)) THEN
436	pdqcloud(ig,l,igcm_ccn_number) =
437	& - pq(ig,l,igcm_ccn_number)/ptimestep
438	& - pdq(ig,l,igcm_ccn_number) + 1.
439	pdqcloud(ig,l,igcm_dust_number) =
440	& -pdqcloud(ig,l,igcm_ccn_number)
441	pdqcloud(ig,l,igcm_ccn_mass) =
442	& - pq(ig,l,igcm_ccn_mass)/ptimestep
443	& - pdq(ig,l,igcm_ccn_mass) + 1.e-20
444	pdqcloud(ig,l,igcm_dust_mass) =
445	& -pdqcloud(ig,l,igcm_ccn_mass)
446	ENDIF
447	ENDDO
448	ENDDO
449	ENDIF
450
451	IF(scavenging) THEN
452	DO l=1,nlay
453	DO ig=1,ngrid
454	IF ((pq(ig,l,igcm_dust_number) +
455	& ptimestep* (pdq(ig,l,igcm_dust_number) +
456	& pdqcloud(ig,l,igcm_dust_number)) .le. 1.)
457	& .or. (pq(ig,l,igcm_dust_mass) +
458	& ptimestep* (pdq(ig,l,igcm_dust_mass) +
459	& pdqcloud(ig,l,igcm_dust_mass)) .le. 1.e-20)) THEN
460	pdqcloud(ig,l,igcm_dust_number) =
461	& - pq(ig,l,igcm_dust_number)/ptimestep
462	& - pdq(ig,l,igcm_dust_number) + 1.
463	pdqcloud(ig,l,igcm_ccn_number) =
464	& -pdqcloud(ig,l,igcm_dust_number)
465	pdqcloud(ig,l,igcm_dust_mass) =
466	& - pq(ig,l,igcm_dust_mass)/ptimestep
467	& - pdq(ig,l,igcm_dust_mass) + 1.e-20
468	pdqcloud(ig,l,igcm_ccn_mass) =
469	& -pdqcloud(ig,l,igcm_dust_mass)
470	ENDIF
471	ENDDO
472	ENDDO
473	ENDIF
474
475	DO l=1,nlay
476	DO ig=1,ngrid
477	IF (pq(ig,l,igcm_h2o_ice) + ptimestep*
478	& (pdq(ig,l,igcm_h2o_ice) + pdqcloud(ig,l,igcm_h2o_ice))
479	& .le. 1.e-8) THEN
480	pdqcloud(ig,l,igcm_h2o_ice) =
481	& - pq(ig,l,igcm_h2o_ice)/ptimestep - pdq(ig,l,igcm_h2o_ice)
482	pdqcloud(ig,l,igcm_h2o_vap) = -pdqcloud(ig,l,igcm_h2o_ice)
483	ENDIF
484	IF (pq(ig,l,igcm_h2o_vap) + ptimestep*
485	& (pdq(ig,l,igcm_h2o_vap) + pdqcloud(ig,l,igcm_h2o_vap))
486	& .le. 1.e-8) THEN
487	pdqcloud(ig,l,igcm_h2o_vap) =
488	& - pq(ig,l,igcm_h2o_vap)/ptimestep - pdq(ig,l,igcm_h2o_vap)
489	pdqcloud(ig,l,igcm_h2o_ice) = -pdqcloud(ig,l,igcm_h2o_vap)
490	ENDIF
491	ENDDO
492	ENDDO
493
494
495	c------Update the ice and dust particle size "rice" for output or photochemistry
496	c------Only rsedcloud is used for the water cycle
497
498	IF(scavenging) THEN
499	DO l=1, nlay
500	DO ig=1,ngrid
501
502	call updaterdust(
503	& pq(ig,l,igcm_dust_mass) + ! dust mass
504	& (pdq(ig,l,igcm_dust_mass) + ! dust mass
505	& pdqcloud(ig,l,igcm_dust_mass))*ptimestep, ! dust mass
506	& pq(ig,l,igcm_dust_number) + ! dust number
507	& (pdq(ig,l,igcm_dust_number) + ! dust number
508	& pdqcloud(ig,l,igcm_dust_number))*ptimestep, ! dust number
509	& rdust(ig,l))
510
511	ENDDO
512	ENDDO
513	ENDIF
514
515	IF(microphys) THEN
516
517	! In case one does not want to allow supersatured water when using microphysics.
518	! Not done by default.
519	IF(.not.supersat) THEN
520	zt = pt + (pdt+pdtcloud)*ptimestep
521	call watersat(ngrid*nlay,zt,pplay,zqsat)
522	DO l=1, nlay
523	DO ig=1,ngrid
524	IF (pq(ig,l,igcm_h2o_vap)
525	& + (pdq(ig,l,igcm_h2o_vap) + pdqcloud(ig,l,igcm_h2o_vap))
526	& * ptimestep .ge. zqsat(ig,l)) THEN
527	pdqcloud(ig,l,igcm_h2o_vap) =
528	& (zqsat(ig,l) - pq(ig,l,igcm_h2o_vap))/ptimestep
529	& - pdq(ig,l,igcm_h2o_vap)
530	pdqcloud(ig,l,igcm_h2o_ice) =
531	& -pdqcloud(ig,l,igcm_h2o_vap)
532	! no need to correct ccn_number, updaterad can handle this properly.
533	ENDIF
534	ENDDO
535	ENDDO
536	ENDIF
537
538	DO l=1, nlay
539	DO ig=1,ngrid
540
541	call updaterice_micro(
542	& pq(ig,l,igcm_h2o_ice) + ! ice mass
543	& (pdq(ig,l,igcm_h2o_ice) + ! ice mass
544	& pdqcloud(ig,l,igcm_h2o_ice))*ptimestep, ! ice mass
545	& pq(ig,l,igcm_ccn_mass) + ! ccn mass
546	& (pdq(ig,l,igcm_ccn_mass) + ! ccn mass
547	& pdqcloud(ig,l,igcm_ccn_mass))*ptimestep, ! ccn mass
548	& pq(ig,l,igcm_ccn_number) + ! ccn number
549	& (pdq(ig,l,igcm_ccn_number) + ! ccn number
550	& pdqcloud(ig,l,igcm_ccn_number))*ptimestep, ! ccn number
551	& tauscaling(ig),rice(ig,l),rhocloud(ig,l))
552
553	ENDDO
554	ENDDO
555
556	ELSE ! no microphys
557
558	DO l=1,nlay
559	DO ig=1,ngrid
560
561	call updaterice_typ(
562	& pq(ig,l,igcm_h2o_ice) + ! ice mass
563	& (pdq(ig,l,igcm_h2o_ice) + ! ice mass
564	& pdqcloud(ig,l,igcm_h2o_ice))*ptimestep, ! ice mass
565	& tau(ig,1),pzlay(ig,l),rice(ig,l))
566
567	ENDDO
568	ENDDO
569
570	ENDIF ! of IF(microphys)
571
572
573
574	c A correction if a lot of subliming CO2 fills the 1st layer FF04/2005
575	c ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
576	c Then that should not affect the ice particle radius
577	do ig=1,ngrid
578	if(pdpsrf(ig)ptimestep.gt.0.9(pplev(ig,1)-pplev(ig,2)))then
579	if(pdpsrf(ig)ptimestep.gt.0.9(pplev(ig,1)-pplev(ig,3)))
580	& rice(ig,2)=rice(ig,3)
581	rice(ig,1)=rice(ig,2)
582	end if
583	end do
584
585
586	DO l=1,nlay
587	DO ig=1,ngrid
588	rsedcloud(ig,l)=max(rice(ig,l)*
589	& (1.+nuice_sed)(1.+nuice_sed)(1.+nuice_sed),
590	& rdust(ig,l))
591	! rsedcloud(ig,l)=min(rsedcloud(ig,l),1.e-4)
592	ENDDO
593	ENDDO
594
595	! used for rad. transfer calculations
596	! nuice is constant because a lognormal distribution is prescribed
597	nuice(1:ngrid,1:nlay)=nuice_ref
598
599	c------Update tendencies for sub-grid water ice clouds
600	IF (CLFvarying) THEN
601	DO ig=1,ngrid
602	DO l=1,nlay
603	pdqcloud(ig,l,igcm_dust_mass)=pdqcloud(ig,l,igcm_dust_mass)
604	& *cloudfrac(ig,l)
605	pdqcloud(ig,l,igcm_ccn_mass)=pdqcloud(ig,l,igcm_ccn_mass)
606	& *cloudfrac(ig,l)
607	pdqcloud(ig,l,igcm_dust_number)=pdqcloud(ig,l,
608	& igcm_dust_number) *cloudfrac(ig,l)
609	pdqcloud(ig,l,igcm_ccn_number)=pdqcloud(ig,l,
610	& igcm_ccn_number) *cloudfrac(ig,l)
611	pdqcloud(ig,l,igcm_h2o_vap)=pdqcloud(ig,l,
612	& igcm_h2o_vap) *cloudfrac(ig,l)
613	pdqcloud(ig,l,igcm_h2o_ice)=pdqcloud(ig,l,
614	& igcm_h2o_ice) *cloudfrac(ig,l)
615	ENDDO
616	ENDDO
617	pdtcloud(:,:)=pdtcloud(:,:)*cloudfrac(:,:)
618	ENDIF
619	#ifndef MESOSCALE
620	c=======================================================================
621	call WRITEDIAGFI(ngrid,"pdqice2","pdqcloudice apres microphysique"
622	& ,"kg/kg.s-1",3,pdqcloud(1:ngrid,1:nlay,igcm_h2o_ice))
623	call WRITEDIAGFI(ngrid,"pdqvap2","pdqcloudvap apres microphysique"
624	& ,"kg/kg.s-1",3,pdqcloud(1:ngrid,1:nlay,
625	& igcm_h2o_vap))
626	call WRITEDIAGFI(ngrid,"pdqccn2","pdqcloudccn apres microphysique"
627	& ,"kg/kg.s-1",3,pdqcloud(1:ngrid,1:nlay,
628	& igcm_ccn_mass))
629	call WRITEDIAGFI(ngrid,"pdqccnN2","pdqcloudccnN apres
630	& microphysique","nb/kg.s-1",3,pdqcloud(1:ngrid,1:nlay,
631	& igcm_ccn_number))
632	call WRITEDIAGFI(ngrid,"pdqdust2", "pdqclouddust apres
633	& microphysique","kg/kg.s-1",3,pdqcloud(1:ngrid,1:nlay,
634	& igcm_dust_mass))
635	call WRITEDIAGFI(ngrid,"pdqdustN2", "pdqclouddustN apres
636	& microphysique","nb/kg.s-1",3,pdqcloud(1:ngrid,1:nlay,
637	& igcm_dust_number))
638	c=======================================================================
639	#endif
640
641	END SUBROUTINE watercloud
642
643	END MODULE watercloud_mod

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