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co2condens_mod.F @ 2646

Last change on this file since 2646 was 2617, checked in by romain.vande, 3 years ago
LMDZ_MARS RV : Open_MP; In co2condens_mod : remove emisref from THREADPRIVATE as it is not a saved variable
File size: 37.7 KB

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1	MODULE co2condens_mod
2
3	IMPLICIT NONE
4
5	logical, save :: scavco2cond = .false. ! flag for using scavenging_by_co2
6	!$OMP THREADPRIVATE(scavco2cond)
7
8	CONTAINS
9
10	SUBROUTINE co2condens(ngrid,nlayer,nq,ptimestep,
11	$ pcapcal,pplay,pplev,ptsrf,pt,
12	$ pphi,pdt,pdu,pdv,pdtsrf,pu,pv,pq,pdq,
13	$ piceco2,psolaralb,pemisurf,rdust,
14	$ pdtc,pdtsrfc,pdpsrf,pduc,pdvc,pdqc,
15	$ fluxsurf_sw,zls,
16	$ zdqssed_co2,pcondicea_co2microp,
17	$ pdqsc)
18
19	use tracer_mod, only: noms, igcm_h2o_ice, igcm_h2o_vap,
20	& igcm_dust_mass, igcm_dust_number,
21	& igcm_ccn_mass, igcm_ccn_number,
22	& igcm_hdo_ice, igcm_hdo_vap,
23	& nqperes,nqfils, ! MVals: variables isotopes
24	& qperemin,masseqmin,
25	& igcm_co2
26	use surfdat_h, only: emissiv, phisfi
27	use geometry_mod, only: latitude, ! grid point latitudes (rad)
28	& longitude_deg, latitude_deg
29	use planete_h, only: obliquit
30	use comcstfi_h, only: cpp, g, r, pi
31	use dust_param_mod, only: freedust
32
33	#ifndef MESOSCALE
34	USE vertical_layers_mod, ONLY: ap, bp
35	#endif
36	IMPLICIT NONE
37	c=======================================================================
38	c subject:
39	c --------
40	c Condensation/sublimation of CO2 ice on the ground and in the
41	c atmosphere
42	c (Scheme described in Forget et al., Icarus, 1998)
43	c
44	c author: Francois Forget 1994-1996 ; updated 1996 -- 2018
45	c ------
46	c adapted to external CO2 ice clouds scheme by Deborah Bardet (2018) '
47	c
48	c=======================================================================
49	c
50	c 0. Declarations :
51	c ------------------
52	c
53	include "callkeys.h"
54
55	c-----------------------------------------------------------------------
56	c Arguments :
57	c ---------
58	INTEGER,INTENT(IN) :: ngrid ! number of atmospheric columns
59	INTEGER,INTENT(IN) :: nlayer ! number of vertical layers
60	INTEGER,INTENT(IN) :: nq ! number of tracers
61
62	REAL,INTENT(IN) :: ptimestep ! physics timestep (s)
63	REAL,INTENT(IN) :: pcapcal(ngrid)
64	REAL,INTENT(IN) :: pplay(ngrid,nlayer) !mid-layer pressure (Pa)
65	REAL,INTENT(IN) :: pplev(ngrid,nlayer+1) ! inter-layer pressure (Pa)
66	REAL,INTENT(IN) :: ptsrf(ngrid) ! surface temperature (K)
67	REAL,INTENT(IN) :: pt(ngrid,nlayer) ! atmospheric temperature (K)
68	REAL,INTENT(IN) :: pphi(ngrid,nlayer) ! geopotential (m2.s-2)
69	REAL,INTENT(IN) :: pdt(ngrid,nlayer) ! tendency on temperature from
70	! previous physical processes (K/s)
71	REAL,INTENT(IN) :: pdu(ngrid,nlayer) ! tendency on zonal wind (m/s2)
72	! from previous physical processes
73	REAL,INTENT(IN) :: pdv(ngrid,nlayer) ! tendency on meridional wind (m/s2)
74	! from previous physical processes
75	REAL,INTENT(IN) :: pdtsrf(ngrid) ! tendency on surface temperature from
76	! previous physical processes (K/s)
77	REAL,INTENT(IN) :: pu(ngrid,nlayer) ! zonal wind (m/s)
78	REAL,INTENT(IN) :: pv(ngrid,nlayer) ! meridional wind (m/s)
79	REAL,INTENT(IN) :: pq(ngrid,nlayer,nq) ! tracers (../kg_air)
80	REAL,INTENT(IN) :: pdq(ngrid,nlayer,nq) ! tendency on tracers from
81	! previous physical processes
82
83	REAL,INTENT(IN) :: zdqssed_co2(ngrid) ! CO2 flux at the surface (kg.m-2.s-1)
84	REAL,INTENT(IN) :: pcondicea_co2microp(ngrid,nlayer)! tendency due to CO2 condensation (kg/kg.s-1)
85
86	REAL,INTENT(INOUT) :: piceco2(ngrid) ! CO2 ice on the surface (kg.m-2)
87	REAL,INTENT(INOUT) :: psolaralb(ngrid,2) ! albedo of the surface
88	REAL,INTENT(INOUT) :: pemisurf(ngrid) ! emissivity of the surface
89	REAL,INTENT(IN) :: rdust(ngrid,nlayer) ! dust effective radius
90
91	! tendencies due to CO2 condensation/sublimation:
92	REAL,INTENT(OUT) :: pdtc(ngrid,nlayer) ! tendency on temperature (K/s)
93	REAL,INTENT(OUT) :: pdtsrfc(ngrid) ! tendency on surface temperature (K/s)
94	REAL,INTENT(OUT) :: pdpsrf(ngrid) ! tendency on surface pressure (Pa/s)
95	REAL,INTENT(OUT) :: pduc(ngrid,nlayer) ! tendency on zonal wind (m.s-2)
96	REAL,INTENT(OUT) :: pdvc(ngrid,nlayer) ! tendency on meridional wind (m.s-2)
97	REAL,INTENT(OUT) :: pdqc(ngrid,nlayer,nq) ! tendency on tracers
98	REAL,INTENT(OUT) :: pdqsc(ngrid,nq) ! tendency on surface tracers
99
100	! added to calculate flux dependent albedo:
101	REAL,intent(in) :: fluxsurf_sw(ngrid,2)
102	real,intent(in) :: zls ! solar longitude (rad)
103
104	c
105	c Local variables :
106	c -----------------
107
108	INTEGER i,j
109	INTEGER l,ig,iq,icap
110	REAL zt(ngrid,nlayer)
111	REAL zcpi
112	REAL ztcond (ngrid,nlayer+1) ! CO2 condensation temperature (atm)
113	REAL ztcondsol(ngrid) ! CO2 condensation temperature (surface)
114	REAL zdiceco2(ngrid)
115	REAL zcondicea(ngrid,nlayer) ! condensation rate in layer l (kg/m2/s)
116	REAL zcondices(ngrid) ! condensation rate on the ground (kg/m2/s)
117	REAL zfallice(ngrid,nlayer+1) ! amount of ice falling from layer l (kg/m2/s)
118	REAL condens_layer(ngrid,nlayer) ! co2clouds: condensation rate in layer l (kg/m2/s)
119	REAL condens_column(ngrid) ! co2clouds: sum(condens_layer(ig,:)) (kg/m2/s)
120	REAL zfallheat
121	REAL zmflux(nlayer+1)
122	REAL zu(nlayer),zv(nlayer)
123	REAL zqc(nlayer,nq),zq1(nlayer)
124	REAL ztsrf(ngrid)
125	REAL ztc(nlayer), ztm(nlayer+1)
126	REAL zum(nlayer+1) , zvm(nlayer+1)
127	REAL zqm(nlayer+1,nq),zqm1(nlayer+1)
128	REAL masse(nlayer),w(nlayer+1)
129	REAL Sm(nlayer),Smq(nlayer,nq),mixmas,qmix
130	REAL availco2
131	LOGICAL condsub(ngrid)
132
133	real :: emisref(ngrid)
134
135	REAL zdq_scav(ngrid,nlayer,nq) ! tendency due to scavenging by co2
136	REAL zq(ngrid,nlayer,nq)
137
138	c variable speciale diagnostique
139	real tconda1(ngrid,nlayer)
140	real tconda2(ngrid,nlayer)
141	c REAL zdiceco2a(ngrid) ! for diagnostic only
142	real zdtsig (ngrid,nlayer)
143	real zdt (ngrid,nlayer)
144	real vmr_co2(ngrid,nlayer) ! co2 volume mixing ratio
145	! improved_ztcond flag: If set to .true. (AND running with a 'co2' tracer)
146	! then condensation temperature is computed using partial pressure of CO2
147	logical,parameter :: improved_ztcond=.true.
148
149	c local saved variables
150	integer,save :: ico2 ! index of CO2 tracer
151	real,save :: qco2,mmean
152	real,parameter :: latcond=5.9e5 ! (J/kg) Latent heat of solid CO2 ice
153	real,parameter :: tcond1mb=136.27 ! condensation temperature (K) at 1 mbar
154	real,parameter :: cpice=1000. ! (J.kg-1.K-1) specific heat of CO2 ice
155	REAL,SAVE :: acond,bcond,ccond
156	real,save :: m_co2, m_noco2, A , B
157
158	LOGICAL,SAVE :: firstcall = .true. !,firstcall2=.true.
159
160	!$OMP THREADPRIVATE(ico2,qco2,mmean,acond,bcond,ccond,m_co2,m_noco2)
161	!$OMP THREADPRIVATE(A,B,firstcall)
162
163	c D.BARDET: for debug
164	real ztc3D(ngrid,nlayer)
165	REAL ztm3D(ngrid,nlayer)
166	REAL zmflux3D(ngrid,nlayer)
167
168	c MVals: variables isotopes
169	REAL Ratio1(nlayer),Ratiom1(nlayer+1)
170	REAL masseq(nlayer),wq(nlayer+1)
171	INTEGER ifils,iq2
172
173	c----------------------------------------------------------------------
174
175	c Initialisation
176	c --------------
177	c
178	! AS: firstcall OK absolute
179	IF (firstcall) THEN
180
181	bcond=1./tcond1mb
182	ccond=cpp/(g*latcond)
183	acond=r/latcond
184
185	firstcall=.false.
186	write(,) 'CO2condens: improved_ztcond=',improved_ztcond
187	PRINT*,'In co2condens:Tcond(P=1mb)=',tcond1mb,' Lcond=',latcond
188	PRINT*,'acond,bcond,ccond',acond,bcond,ccond
189
190	ico2=0
191
192	if (tracer) then
193	c Prepare Special treatment if one of the tracer is CO2 gas
194	do iq=1,nq
195	if (noms(iq).eq."co2") then
196	ico2=iq
197	m_co2 = 44.01E-3 ! CO2 molecular mass (kg/mol)
198	m_noco2 = 33.37E-3 ! Non condensible mol mass (kg/mol)
199	c Compute A and B coefficient use to compute
200	c mean molecular mass Mair defined by
201	c 1/Mair = q(ico2)/m_co2 + (1-q(ico2))/m_noco2
202	c 1/Mair = A*q(ico2) + B
203	A =(1/m_co2 - 1/m_noco2)
204	B=1/m_noco2
205	endif
206	enddo
207	end if
208	ENDIF ! of IF (firstcall)
209	zcpi=1./cpp
210
211	c
212	c======================================================================
213	c Calcul of CO2 condensation sublimation
214	c ============================================================
215	c
216	c Used variable :
217	c piceco2(ngrid) : amount of co2 ice on the ground (kg/m2)
218	c zcondicea(ngrid,l): condensation rate in layer l (kg/m2/s)
219	c zcondices(ngrid): condensation rate on the ground (kg/m2/s)
220	c zfallice(ngrid,l):amount of ice falling from layer l (kg/m2/s)
221	c
222	c pdtc(ngrid,nlayer) : dT/dt due to cond/sub
223	c
224	c
225	c Tendencies set to 0
226	c -------------------------------------
227	zcondicea(1:ngrid,1:nlayer) = 0.
228	zfallice(1:ngrid,1:nlayer+1) = 0.
229	pduc(1:ngrid,1:nlayer) = 0
230	pdvc(1:ngrid,1:nlayer) = 0
231	pdtc(1:ngrid,1:nlayer) = 0.
232	pdqsc(1:ngrid,1:nq) = 0
233
234	pdqc(1:ngrid,1:nlayer,1:nq) = 0
235
236	zcondices(1:ngrid) = 0.
237	pdtsrfc(1:ngrid) = 0.
238	pdpsrf(1:ngrid) = 0.
239	condsub(1:ngrid) = .false.
240	zdiceco2(1:ngrid) = 0.
241
242	zfallheat=0
243
244	zdq_scav(:,:,:)=0.
245
246	c Update tendencies from previous processes
247	c -------------------------------------
248	DO l=1,nlayer
249	DO ig=1,ngrid
250	zt(ig,l)=pt(ig,l)+ pdt(ig,l)*ptimestep
251	do iq=1,nq
252	zq(ig,l,iq)=pq(ig,l,iq)+pdq(ig,l,iq)*ptimestep
253	enddo
254	ENDDO
255	ENDDO
256
257	c *************************
258	c ATMOSPHERIC CONDENSATION
259	c *************************
260
261	c Compute CO2 Volume mixing ratio
262	c -------------------------------
263	if (improved_ztcond.and.(ico2.ne.0)) then
264	DO l=1,nlayer
265	DO ig=1,ngrid
266	qco2=pq(ig,l,ico2)+pdq(ig,l,ico2)*ptimestep
267	c Mean air molecular mass = 1/(q(ico2)/m_co2 + (1-q(ico2))/m_noco2)
268	mmean=1/(A*qco2 +B)
269	vmr_co2(ig,l) = qco2*mmean/m_co2
270	ENDDO
271	ENDDO
272	else
273	DO l=1,nlayer
274	DO ig=1,ngrid
275	vmr_co2(ig,l)=0.95
276	ENDDO
277	ENDDO
278	endif
279
280	IF (.NOT. co2clouds) then
281	c forecast of atmospheric temperature zt and frost temperature ztcond
282	c --------------------------------------------------------------------
283
284	DO l=1,nlayer
285	DO ig=1,ngrid
286	! ztcond(ig,l)=1./(bcond-acondlog(.0095pplay(ig,l)))
287	if (pplay(ig,l).ge.1e-4) then
288	ztcond(ig,l)=
289	& 1./(bcond-acondlog(.01vmr_co2(ig,l)*pplay(ig,l)))
290	else
291	ztcond(ig,l)=0.0 !mars Monica
292	endif
293	ENDDO
294	ENDDO
295
296	ztcond(:,nlayer+1)=ztcond(:,nlayer)
297
298	c Condensation/sublimation in the atmosphere
299	c ------------------------------------------
300	c (calcul of zcondicea , zfallice and pdtc)
301	c
302	DO l=nlayer , 1, -1
303	DO ig=1,ngrid
304	pdtc(ig,l)=0.
305	IF((zt(ig,l).LT.ztcond(ig,l)).or.(zfallice(ig,l+1).gt.0))THEN
306	condsub(ig)=.true.
307	IF (zfallice(ig,l+1).gt.0) then
308	zfallheat=zfallice(ig,l+1)*
309	& (pphi(ig,l+1)-pphi(ig,l) +
310	& cpice*(ztcond(ig,l+1)-ztcond(ig,l)))/latcond
311	ELSE
312	zfallheat=0.
313	ENDIF
314	pdtc(ig,l)=(ztcond(ig,l) - zt(ig,l))/ptimestep
315	zcondicea(ig,l)=(pplev(ig,l)-pplev(ig,l+1))
316	& ccondpdtc(ig,l)- zfallheat
317	c Case when the ice from above sublimes entirely
318	c """""""""""""""""""""""""""""""""""""""""""""""
319	IF (zfallice(ig,l+1).lt.- zcondicea(ig,l)) then
320	pdtc(ig,l)=(-zfallice(ig,l+1)+zfallheat)/
321	& (ccond*(pplev(ig,l)-pplev(ig,l+1)))
322	zcondicea(ig,l)= -zfallice(ig,l+1)
323	END IF
324
325	zfallice(ig,l) = zcondicea(ig,l)+zfallice(ig,l+1)
326	END IF
327	ENDDO
328	ENDDO
329
330	condens_layer(:,:) = zcondicea(:,:)
331	condens_column(:) = 0.
332
333	if (scavco2cond) then
334	call scavenging_by_co2(ngrid,nlayer,nq,ptimestep,pplev,zq,
335	& rdust,zcondicea,zfallice,zdq_scav,pdqsc)
336	endif
337
338	ELSE ! if co2 clouds
339	condens_layer(:,:) = 0.
340	condens_column(:) = 0.
341	DO l=nlayer , 1, -1
342	DO ig=1,ngrid
343	condens_layer(ig,l) = pcondicea_co2microp(ig,l)*
344	& (pplev(ig,l) - pplev(ig,l+1))/g
345	ENDDO
346	ENDDO
347	DO ig=1,ngrid
348	condens_column(ig) = sum(condens_layer(ig,:))
349	zfallice(ig,1) = zdqssed_co2(ig)
350	piceco2(ig) = piceco2(ig) + zdqssed_co2(ig)*ptimestep
351	ENDDO
352	ENDIF ! end of if co2clouds
353
354	call WRITEdiagfi(ngrid,"pdtc_atm",
355	& "temperature tendency due to CO2 condensation",
356	& " ",3,pdtc)
357
358	call WRITEdiagfi(ngrid,"condens_layer",
359	& "",
360	& " ",3,condens_layer)
361
362	call WRITEdiagfi(ngrid,"zfallice",
363	& "",
364	& " ",2,zfallice(ngrid,1))
365
366
367	c *************************
368	c SURFACE CONDENSATION
369	c *************************
370
371	c forecast of ground temperature ztsrf and frost temperature ztcondsol
372	c --------------------------------------------------------------------
373	DO ig=1,ngrid
374	ztcondsol(ig)=
375	& 1./(bcond-acondlog(.01vmr_co2(ig,1)*pplev(ig,1)))
376	ztsrf(ig) = ptsrf(ig) + pdtsrf(ig)*ptimestep
377	ENDDO
378
379	c
380	c Condensation/sublimation on the ground
381	c --------------------------------------
382	c (compute zcondices and pdtsrfc)
383	c
384	c No microphysics of CO2 clouds
385	DO ig=1,ngrid
386	IF(latitude(ig).lt.0) THEN
387	! Southern hemisphere
388	icap=2
389	ELSE
390	! Northern hemisphere
391	icap=1
392	ENDIF
393	c
394	c Loop on where we have condensation/ sublimation
395	IF ((ztsrf(ig) .LT. ztcondsol(ig)) .OR. ! ground cond
396	$ (zfallice(ig,1).NE.0.) .OR. ! falling snow
397	$ ((ztsrf(ig) .GT. ztcondsol(ig)) .AND. ! ground sublim.
398	$ ((piceco2(ig)+zfallice(ig,1)*ptimestep) .NE. 0.))) THEN
399	condsub(ig) = .true.
400
401	IF (zfallice(ig,1).gt.0 .and. .not. co2clouds) then
402	zfallheat = zfallice(ig,1) * (pphi(ig,1)- phisfi(ig) +
403	& cpice*(ztcond(ig,1)-ztcondsol(ig)))/latcond
404	ELSE
405	zfallheat = 0.
406	ENDIF
407	c condensation or partial sublimation of CO2 ice
408	c """""""""""""""""""""""""""""""""""""""""""""""
409	zcondices(ig) = pcapcal(ig)*(ztcondsol(ig)-ztsrf(ig))
410	& /(latcond*ptimestep) - zfallheat
411	pdtsrfc(ig) = (ztcondsol(ig) - ztsrf(ig))/ptimestep
412	#ifdef MESOSCALE
413	print*, "not enough CO2 tracer in 1st layer to condense"
414	print*, ">>> to be implemented in the mesoscale case"
415	print*, "because this uses ap levels..."
416	#else
417	c If there is not enough CO2 tracer in 1st layer to condense
418	c """"""""""""""""""""""""""""""""""""""""""""""""""""""
419	IF(ico2.ne.0) then
420	c Available CO2 tracer in layer 1 at end of timestep (kg/m2)
421	#ifndef MESOSCALE
422	availco2 = pq(ig,1,ico2)*((ap(1)-ap(2))+
423	& (bp(1)-bp(2))*(pplev(ig,1)/g -
424	& (zcondices(ig) + zfallice(ig,1))*ptimestep))
425	if ((zcondices(ig) + condens_layer(ig,1))*ptimestep
426	& .gt.availco2) then
427	zcondices(ig) = availco2/ptimestep -
428	& condens_layer(ig,1)
429	pdtsrfc(ig) = (latcond/pcapcal(ig))*
430	& (zcondices(ig)+zfallheat)
431	end if
432	#else
433	availco2 = pq(ig,1,igcm_co2)
434	PRINT*, "MESOSCALE: CO2 tracer AT FIRST LEVEL IS NOT'
435	& ' CORRECTED FROM SIGMA LEVELS"
436	#endif
437	ENDIF
438	#endif
439
440	c If the entire CO2 ice layer sublimes
441	c """"""""""""""""""""""""""""""""""""""""""""""""""""
442	c (including what has just condensed in the atmosphere)
443	IF((piceco2(ig)/ptimestep+zfallice(ig,1)).LE.
444	& -zcondices(ig))THEN
445	zcondices(ig) = -piceco2(ig)/ptimestep - zfallice(ig,1)
446	pdtsrfc(ig)=(latcond/pcapcal(ig))*
447	& (zcondices(ig)+zfallheat)
448	END IF
449
450	c Changing CO2 ice amount and pressure :
451	c """"""""""""""""""""""""""""""""""""
452	zdiceco2(ig) = zcondices(ig) + zfallice(ig,1)
453	& + condens_column(ig)
454	if (co2clouds) then
455	! add here only direct condensation/sublimation
456	piceco2(ig) = piceco2(ig) + zcondices(ig)*ptimestep
457	else
458	! add here also CO2 ice in the atmosphere
459	piceco2(ig) = piceco2(ig) + zdiceco2(ig)*ptimestep
460	end if
461	pdpsrf(ig) = -zdiceco2(ig)*g
462
463	IF(ABS(pdpsrf(ig)*ptimestep).GT.pplev(ig,1)) THEN
464	PRINT*,'STOP in condens'
465	PRINT*,'condensing more than total mass'
466	PRINT*,'Grid point ',ig
467	PRINT*,'Longitude(degrees): ',longitude_deg(ig)
468	PRINT*,'Latitude(degrees): ',latitude_deg(ig)
469	PRINT*,'Ps = ',pplev(ig,1)
470	PRINT*,'d Ps = ',pdpsrf(ig)
471	CALL abort_physic('co2condens',
472	& 'condensing more than total mass', 1)
473	ENDIF
474	END IF ! if there is condensation/sublimation
475	ENDDO ! of DO ig=1,ngrid
476
477	c ********************************************************************
478	c Surface albedo and emissivity of the surface below the snow (emisref)
479	c ********************************************************************
480
481	! Check that amont of CO2 ice is not problematic
482	DO ig=1,ngrid
483	if(.not.piceco2(ig).ge.0.) THEN
484	if(piceco2(ig).le.-5.e-8) print*,
485	$ 'WARNING co2condens piceco2(',ig,')=', piceco2(ig)
486	piceco2(ig)=0.
487	endif
488	ENDDO
489
490	! Set albedo and emissivity of the surface
491	! ----------------------------------------
492	CALL albedocaps(zls,ngrid,piceco2,psolaralb,emisref)
493
494	! set pemisurf() to emissiv when there is bare surface (needed for co2snow)
495	DO ig=1,ngrid
496	if (piceco2(ig).eq.0) then
497	pemisurf(ig)=emissiv
498	endif
499	ENDDO
500
501	! firstcall2=.false.
502	c ***************************************************************
503	c Correction to account for redistribution between sigma or hybrid
504	c layers when changing surface pressure (and warming/cooling
505	c of the CO2 currently changing phase).
506	c *************************************************************
507
508	DO ig=1,ngrid
509	if (condsub(ig)) then
510	do l=1,nlayer
511	ztc(l) =zt(ig,l) +pdtc(ig,l) *ptimestep
512	zu(l) =pu(ig,l) +pdu( ig,l) *ptimestep
513	zv(l) =pv(ig,l) +pdv( ig,l) *ptimestep
514	do iq=1,nq
515	zqc(l,iq)=zq(ig,l,iq)+zdq_scav(ig,l,iq)*ptimestep ! zdq_scav=0 if co2clouds=true
516	enddo
517	enddo
518
519	c Mass fluxes through the sigma levels (kg.m-2.s-1) (>0 when up)
520	c """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
521	zmflux(1) = -zcondices(ig) - zdqssed_co2(ig)
522	DO l=1,nlayer
523	zmflux(l+1) = zmflux(l) - condens_layer(ig,l)
524	#ifndef MESOSCALE
525	& + (bp(l)-bp(l+1))*(-pdpsrf(ig)/g)
526	c zmflux set to 0 if very low to avoid: top layer is disappearing in v1ld
527	if (abs(zmflux(l+1)).lt.1E-13.OR.bp(l+1).eq.0.) then
528	zmflux(l+1)=0.
529	end if
530	#else
531	zmflux(l+1) = zmflux(l) - condens_layer(ig,l)
532	if (abs(zmflux(l+1)).lt.1E-13) zmflux(l+1)=0.
533	PRINT*, "MESOSCALE: FLUX THROUGH SIGMA LEVELS from"//
534	& "dPS HAVE TO BE IMPLEMENTED"
535	#endif
536	END DO
537	#ifdef MESOSCALE
538	print*,"absurd mass set because bp not available"
539	print*,"TO BE FIXED"
540	#else
541	c Mass of each layer at the end of timestep
542	c -----------------------------------------
543	DO l=1,nlayer
544	masse(l)=( pplev(ig,l) - pplev(ig,l+1) +
545	& (bp(l)-bp(l+1))pdpsrf(ig)ptimestep)/g
546	END DO
547	#endif
548
549	c Corresponding fluxes for T,U,V,Q
550	c """"""""""""""""""""""""""""""""
551
552	c averaging operator for TRANSPORT
553	c """"""""""""""""""""""""""""""""
554	c Value transfert at the surface interface when condensation
555	c sublimation:
556	ztm(1) = ztsrf(ig) + pdtsrfc(ig)*ptimestep
557	zum(1) = 0
558	zvm(1) = 0
559	do iq=1,nq
560	zqm(1,iq)=0. ! most tracer do not condense !
561	enddo
562	c Special case if one of the tracer is CO2 gas
563	if (ico2.ne.0) zqm(1,ico2)=1. ! flux is 100% CO2
564
565	c Van Leer scheme:
566	DO l=1,nlayer+1
567	w(l)=-zmflux(l)*ptimestep
568	END DO
569	call vl1d(nlayer,ztc,2.,masse,w,ztm)
570	call vl1d(nlayer,zu ,2.,masse,w,zum)
571	call vl1d(nlayer,zv ,2.,masse,w,zvm)
572	! MVals: loop over the fathers ("peres")
573	do iq=1,nqperes
574	do l=1,nlayer
575	zq1(l)=zqc(l,iq)
576	enddo
577	zqm1(1)=zqm(1,iq)
578	call vl1d(nlayer,zq1,2.,masse,w,zqm1)
579	do l=2,nlayer
580	zqc(l,iq)=zq1(l)
581	zqm(l,iq)=zqm1(l)
582	enddo
583	! MVals: loop over the sons ("fils")
584	if (nqfils(iq).gt.0) then
585	if (iq.eq.igcm_h2o_ice) then
586	iq2=igcm_hdo_ice
587	else if (iq.eq.igcm_h2o_vap) then
588	iq2=igcm_hdo_vap
589	else
590	call abort_physic("co2condens_mod","invalid isotope",1)
591	endif
592	do l=1,nlayer
593	if (zqc(l,iq).gt.qperemin) then
594	Ratio1(l)=zqc(l,iq2)/zqc(l,iq)
595	else
596	Ratio1(l)=0.
597	endif
598	masseq(l)=max(masse(l)*zqc(l,iq),masseqmin)
599	wq(l)=w(l)*zqm(l,iq)
600	enddo
601	Ratiom1(1)=zqm(1,iq2)
602	call vl1d(nlayer,Ratio1,2.,masseq,wq,Ratiom1)
603	zqm(1,iq2)=Ratiom1(1)*zqc(1,iq)
604	do l=2,nlayer
605	zqm(l,iq2)=Ratiom1(l)*zqm(l,iq)
606	enddo
607	endif !if (nqfils(iq).gt.0) then
608	enddo !iq=1,nqperes
609
610	c Surface condensation affects low winds
611	if (zmflux(1).lt.0) then
612	zum(1)= zu(1) * (w(1)/masse(1))
613	zvm(1)= zv(1) * (w(1)/masse(1))
614	if (w(1).gt.masse(1)) then ! ensure numerical stability
615	zum(1)= (zu(1)-zum(2))*masse(1)/w(1) + zum(2)
616	zvm(1)= (zv(1)-zvm(2))*masse(1)/w(1) + zvm(2)
617	end if
618	end if
619
620	ztm(nlayer+1)= ztc(nlayer) ! should not be used, but...
621	zum(nlayer+1)= zu(nlayer) ! should not be used, but...
622	zvm(nlayer+1)= zv(nlayer) ! should not be used, but...
623	do iq=1,nq
624	zqm(nlayer+1,iq)= zqc(nlayer,iq)
625	enddo
626
627	#ifdef MESOSCALE
628	!!!! AS: This part must be commented in the mesoscale model
629	!!!! AS: ... to avoid instabilities.
630	!!!! AS: you have to compile with -DMESOSCALE to do so
631	#else
632	c Tendencies on T, U, V, Q
633	c """"""""""""""""""""""""
634	DO l=1,nlayer
635	IF(.not. co2clouds) THEN
636	c Tendencies on T
637	zdtsig(ig,l) = (1/masse(l)) *
638	& ( zmflux(l)*(ztm(l) - ztc(l))
639	& - zmflux(l+1)*(ztm(l+1) - ztc(l))
640	& + condens_layer(ig,l)*(ztcond(ig,l)-ztc(l)) )
641	ELSE
642	zdtsig(ig,l) = (1/masse(l)) *
643	& ( zmflux(l)*(ztm(l) - ztc(l))
644	& - zmflux(l+1)*(ztm(l+1) - ztc(l)))
645	ENDIF
646	c D.BARDET: for diagnotics
647	zmflux3D(ig,l)=zmflux(l)
648	ztm3D(ig,l)=ztm(l)
649	ztc3D(ig,l)=ztc(l)
650
651	pdtc(ig,l) = pdtc(ig,l) + zdtsig(ig,l)
652
653	c Tendencies on U
654	pduc(ig,l) = (1/masse(l)) *
655	& ( zmflux(l)*(zum(l) - zu(l))
656	& - zmflux(l+1)*(zum(l+1) - zu(l)) )
657
658
659	c Tendencies on V
660	pdvc(ig,l) = (1/masse(l)) *
661	& ( zmflux(l)*(zvm(l) - zv(l))
662	& - zmflux(l+1)*(zvm(l+1) - zv(l)) )
663
664	END DO
665
666	#endif
667
668	do iq=1,nq
669	! if (noms(iq).eq.'co2') then
670	if (iq.eq.ico2) then
671	c SPECIAL Case when the tracer IS CO2 :
672	DO l=1,nlayer
673	pdqc(ig,l,iq)= (1/masse(l)) *
674	& ( zmflux(l)*(zqm(l,iq) - zqc(l,iq))
675	& - zmflux(l+1)*(zqm(l+1,iq) - zqc(l,iq))
676	& + condens_layer(ig,l)*(zqc(l,iq)-1.) )
677	END DO
678	else
679	DO l=1,nlayer
680	pdqc(ig,l,iq)= (1/masse(l)) *
681	& ( zmflux(l)*(zqm(l,iq) - zqc(l,iq))
682	& - zmflux(l+1)*(zqm(l+1,iq) - zqc(l,iq))
683	& + condens_layer(ig,l)*zqc(l,iq) )
684
685	pdqc(ig,l,iq)=pdqc(ig,l,iq)+zdq_scav(ig,l,iq) ! zdq_scav=0 if co2clouds=true
686	END DO
687	end if
688	enddo
689
690	end if ! if (condsub)
691	END DO ! loop on ig
692
693	c ***************************************************************
694	c CO2 snow / clouds scheme
695	c ***************************************************************
696	call co2snow(ngrid,nlayer,ptimestep,emisref,condsub,pplev,
697	& condens_layer,zcondices,zfallice,pemisurf)
698	c ***************************************************************
699	c Ecriture des diagnostiques
700	c ***************************************************************
701
702	c DO l=1,nlayer
703	c DO ig=1,ngrid
704	c Taux de cond en kg.m-2.pa-1.s-1
705	c tconda1(ig,l)=zcondicea(ig,l)/(pplev(ig,l)-pplev(ig,l+1))
706	c Taux de cond en kg.m-3.s-1
707	c tconda2(ig,l)=tconda1(ig,l)pplay(ig,l)g/(r*pt(ig,l))
708	c END DO
709	c END DO
710	c call WRITEDIAGFI(ngrid,'tconda1',
711	c &'Taux de condensation CO2 atmospherique /Pa',
712	c & 'kg.m-2.Pa-1.s-1',3,tconda1)
713	c call WRITEDIAGFI(ngrid,'tconda2',
714	c &'Taux de condensation CO2 atmospherique /m',
715	c & 'kg.m-3.s-1',3,tconda2)
716
717	! output falling co2 ice in 1st layer:
718	! call WRITEDIAGFI(ngrid,'fallice',
719	! &'Precipitation of co2 ice',
720	! & 'kg.m-2.s-1',2,zfallice(1,1))
721
722	#ifndef MESOSCALE
723	! Extra special case for surface temperature tendency pdtsrfc:
724	! we want to fix the south pole temperature to CO2 condensation temperature
725	if (caps.and.(obliquit.lt.27.)) then
726	! check if last grid point is the south pole
727	if (abs(latitude(ngrid)-(-pi/2.)).lt.1.e-5) then
728	! NB: Updated surface pressure, at grid point 'ngrid', is
729	! ps(ngrid)=pplev(ngrid,1)+pdpsrf(ngrid)*ptimestep
730	! write(,) "co2condens: South pole: latitude(ngrid)=",
731	! & latitude(ngrid)
732	ztcondsol(ngrid)=
733	& 1./(bcond-acondlog(.01vmr_co2(ngrid,1)*
734	& (pplev(ngrid,1)+pdpsrf(ngrid)*ptimestep)))
735	pdtsrfc(ngrid)=(ztcondsol(ngrid)-ztsrf(ngrid))/ptimestep
736	endif
737	endif
738	#endif
739
740	END SUBROUTINE co2condens
741
742
743
744	c *****************************************************************
745	SUBROUTINE vl1d(nlayer,q,pente_max,masse,w,qm)
746	c
747	c
748	c Operateur de moyenne inter-couche pour calcul de transport type
749	c Van-Leer " pseudo amont " dans la verticale
750	c q,w sont des arguments d'entree pour le s-pg ....
751	c masse : masse de la couche Dp/g
752	c w : masse d'atm ``transferee'' a chaque pas de temps (kg.m-2)
753	c pente_max = 2 conseillee
754	c
755	c
756	c --------------------------------------------------------------------
757	IMPLICIT NONE
758
759	c
760	c
761	c
762	c Arguments:
763	c ----------
764	integer nlayer
765	real masse(nlayer),pente_max
766	REAL q(nlayer),qm(nlayer+1)
767	REAL w(nlayer+1)
768	c
769	c Local
770	c ---------
771	c
772	INTEGER l
773	c
774	real dzq(nlayer),dzqw(nlayer),adzqw(nlayer),dzqmax
775	real sigw, Mtot, MQtot
776	integer m
777	c integer ismax,ismin
778
779
780	c On oriente tout dans le sens de la pression
781	c W > 0 WHEN DOWN !!!!!!!!!!!!!
782
783	do l=2,nlayer
784	dzqw(l)=q(l-1)-q(l)
785	adzqw(l)=abs(dzqw(l))
786	enddo
787
788	do l=2,nlayer-1
789	if(dzqw(l)*dzqw(l+1).gt.0.) then
790	dzq(l)=0.5*(dzqw(l)+dzqw(l+1))
791	else
792	dzq(l)=0.
793	endif
794	dzqmax=pente_max*min(adzqw(l),adzqw(l+1))
795	dzq(l)=sign(min(abs(dzq(l)),dzqmax),dzq(l))
796	enddo
797
798	dzq(1)=0.
799	dzq(nlayer)=0.
800
801	do l = 1,nlayer-1
802
803	c Regular scheme (transfered mass < layer mass)
804	c ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
805	if(w(l+1).gt.0. .and. w(l+1).le.masse(l+1)) then
806	sigw=w(l+1)/masse(l+1)
807	qm(l+1)=(q(l+1)+0.5(1.-sigw)dzq(l+1))
808	else if(w(l+1).le.0. .and. -w(l+1).le.masse(l)) then
809	sigw=w(l+1)/masse(l)
810	qm(l+1)=(q(l)-0.5(1.+sigw)dzq(l))
811
812	c Extended scheme (transfered mass > layer mass)
813	c ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
814	else if(w(l+1).gt.0.) then
815	m=l+1
816	Mtot = masse(m)
817	MQtot = masse(m)*q(m)
818	do while ((m.lt.nlayer).and.(w(l+1).gt.(Mtot+masse(m+1))))
819	m=m+1
820	Mtot = Mtot + masse(m)
821	MQtot = MQtot + masse(m)*q(m)
822	end do
823	if (m.lt.nlayer) then
824	sigw=(w(l+1)-Mtot)/masse(m+1)
825	qm(l+1)= (1/w(l+1))(MQtot + (w(l+1)-Mtot)
826	& (q(m+1)+0.5(1.-sigw)dzq(m+1)) )
827	else
828	w(l+1) = Mtot
829	qm(l+1) = Mqtot / Mtot
830	CALL abort_physic('co2condens',
831	& 'top layer is disapearing !', 1)
832	end if
833	else ! if(w(l+1).lt.0)
834	m = l-1
835	Mtot = masse(m+1)
836	MQtot = masse(m+1)*q(m+1)
837	if (m.gt.0) then ! because some compilers will have problems
838	! evaluating masse(0)
839	do while ((m.gt.0).and.(-w(l+1).gt.(Mtot+masse(m))))
840	m=m-1
841	Mtot = Mtot + masse(m+1)
842	MQtot = MQtot + masse(m+1)*q(m+1)
843	if (m.eq.0) exit
844	end do
845	endif
846	if (m.gt.0) then
847	sigw=(w(l+1)+Mtot)/masse(m)
848	qm(l+1)= (-1/w(l+1))(MQtot + (-w(l+1)-Mtot)
849	& (q(m)-0.5(1.+sigw)dzq(m)) )
850	else
851	qm(l+1)= (-1/w(l+1))(MQtot + (-w(l+1)-Mtot)qm(1))
852	end if
853	end if
854	enddo
855
856	c boundary conditions (not used in co2condens !!)
857	c qm(nlayer+1)=0.
858	c if(w(1).gt.0.) then
859	c qm(1)=q(1)
860	c else
861	c qm(1)=0.
862	c end if
863
864	END SUBROUTINE vl1d
865
866	c *****************************************************************
867	SUBROUTINE scavenging_by_co2(ngrid,nlayer,nq,ptimestep,pplev,pq,
868	& rdust,pcondicea,pfallice,pdq_scav,pdqsc)
869
870	c
871	c
872	c Calcul de la quantite de poussiere lessivee par les nuages de CO2
873	c
874	c --------------------------------------------------------------------
875	use tracer_mod, only: nqmx, igcm_h2o_vap, igcm_h2o_ice,
876	& igcm_dust_mass, igcm_dust_number,
877	& igcm_ccn_mass, igcm_ccn_number,
878	& rho_dust, nuice_sed, nuice_ref,r3n_q
879	use comcstfi_h, only: g
880	use dust_param_mod, only: freedust
881	IMPLICIT NONE
882	include "callkeys.h" ! for the flags water and microphys
883	c
884	c
885	c Arguments:
886	INTEGER,INTENT(IN) :: ngrid ! number of atmospheric columns
887	INTEGER,INTENT(IN) :: nlayer ! number of vertical layers
888	INTEGER,INTENT(IN) :: nq ! number of tracers
889	REAL,INTENT(IN) :: ptimestep ! physics timestep (s)
890	REAL,INTENT(IN) :: pplev(ngrid,nlayer+1) ! inter-layer pressure (Pa)
891	REAL,INTENT(IN) :: pq(ngrid,nlayer,nq)
892	REAL,INTENT(IN) :: rdust(ngrid,nlayer) ! dust effective radius
893	REAL,INTENT(IN) :: pcondicea(ngrid,nlayer) ! condensation rate in layer l (kg/m2/s)
894	REAL,INTENT(IN) :: pfallice(ngrid,nlayer+1) ! amount of ice falling from layer l (kg/m2/s)
895
896	REAL,INTENT(OUT) :: pdq_scav(ngrid,nlayer,nq) ! tendency due to scavenging by co2
897	REAL,INTENT(OUT) :: pdqsc(ngrid,nq) ! tendency on surface tracers
898
899	c Locals:
900	INTEGER l,ig
901	REAL scav_ratio_dust, scav_ratio_wice ! ratio of the dust/water ice mass mixing ratios in condensing CO2 ice and in air
902	REAL scav_dust_mass(nlayer+1) ! dust flux (mass) scavenged towards the lower layer (kg/m2/s) (POSITIVE WHEN DOWNWARD)
903	REAL scav_dust_number(nlayer+1) ! dust flux (number) scavenged towards the lower layer (kg/m2/s) (POSITIVE WHEN DOWNWARD)
904	REAL scav_ccn_mass(nlayer+1) ! ccn flux (mass) scavenged towards the lower layer
905	REAL scav_ccn_number(nlayer+1) ! ccn flux (number) scavenged towards the lower layer
906	REAL scav_h2o_ice(nlayer+1) ! water ice flux (mass) scavenged towards the lower layer
907	REAL massl ! mass of the layer l at point ig (kg/m2)
908
909	c Initialization:
910	scav_ratio_dust = 100 !1 !10 !100 !1000
911	scav_ratio_wice = scav_ratio_dust
912	pdq_scav(:,:,:)=0.
913	pdqsc(:,:)=0.
914
915	DO ig=1,ngrid
916	scav_dust_mass(nlayer+1)=0.
917	scav_dust_number(nlayer+1)=0.
918	scav_ccn_mass(nlayer+1)=0.
919	scav_ccn_number(nlayer+1)=0.
920	scav_h2o_ice(nlayer+1)=0.
921
922	DO l=nlayer , 1, -1
923	massl=(pplev(ig,l)-pplev(ig,l+1))/g
924	IF(pcondicea(ig,l).GT.0.)THEN ! if CO2 condenses and traps dust/water ice
925	! Calculation of the tendencies
926	if (freedust) then
927	pdq_scav(ig,l,igcm_dust_mass)=-pq(ig,l,igcm_dust_mass)
928	& /ptimestep*(1-exp(
929	& -scav_ratio_dustpcondicea(ig,l)ptimestep/massl))
930
931	pdq_scav(ig,l,igcm_dust_number)=pdq_scav(ig,l,igcm_dust_mass)
932	& *r3n_q/rdust(ig,l)
933	endif
934	if (freedust.AND.microphys) then
935	pdq_scav(ig,l,igcm_ccn_mass)=-pq(ig,l,igcm_ccn_mass)
936	& /ptimestep*(1-exp(
937	& -scav_ratio_wicepcondicea(ig,l)ptimestep/massl))
938	pdq_scav(ig,l,igcm_ccn_number)=pdq_scav(ig,l,igcm_ccn_mass)
939	& *r3n_q/rdust(ig,l)
940	endif
941	if (water) then
942	pdq_scav(ig,l,igcm_h2o_ice)=-pq(ig,l,igcm_h2o_ice)
943	& /ptimestep*(1-exp(
944	& -scav_ratio_wicepcondicea(ig,l)ptimestep/massl))
945	endif
946
947	ELSE IF(pcondicea(ig,l).LT.0.)THEN ! if CO2 sublimates and releases dust/water ice
948	! Calculation of the tendencies
949	if (freedust) then
950	pdq_scav(ig,l,igcm_dust_mass)=-pcondicea(ig,l)/massl*
951	& scav_dust_mass(l+1)/pfallice(ig,l+1)
952
953	pdq_scav(ig,l,igcm_dust_number)=-pcondicea(ig,l)/massl*
954	& scav_dust_number(l+1)/pfallice(ig,l+1)
955	endif
956	if (freedust.AND.microphys) then
957	pdq_scav(ig,l,igcm_ccn_mass)=-pcondicea(ig,l)/massl*
958	& scav_ccn_mass(l+1)/pfallice(ig,l+1)
959
960	pdq_scav(ig,l,igcm_ccn_number)=-pcondicea(ig,l)/massl*
961	& scav_ccn_number(l+1)/pfallice(ig,l+1)
962	endif
963	if (water) then
964	pdq_scav(ig,l,igcm_h2o_ice)=-pcondicea(ig,l)/massl*
965	& scav_h2o_ice(l+1)/pfallice(ig,l+1)
966	endif
967
968	END IF
969	! Calculation of the scavenged dust/wice flux towards the lower layers
970	if (freedust) then
971	scav_dust_mass(l)=-pdq_scav(ig,l,igcm_dust_mass)*massl
972	& +scav_dust_mass(l+1)
973
974	scav_dust_number(l)=-pdq_scav(ig,l,igcm_dust_number)*massl
975	& +scav_dust_number(l+1)
976	endif
977	if (freedust.AND.microphys) then
978	scav_ccn_mass(l)=-pdq_scav(ig,l,igcm_ccn_mass)*massl
979	& +scav_ccn_mass(l+1)
980
981	scav_ccn_number(l)=-pdq_scav(ig,l,igcm_ccn_number)*massl
982	& +scav_dust_number(l+1)
983	endif
984	if (water) then
985	scav_h2o_ice(l)=-pdq_scav(ig,l,igcm_h2o_ice)*massl
986	& +scav_h2o_ice(l+1)
987	endif
988
989	ENDDO
990	! Calculation of the surface tendencies
991	if (freedust) then
992	pdqsc(ig,igcm_dust_mass)=pdqsc(ig,igcm_dust_mass)
993	& +scav_dust_mass(1)
994	pdqsc(ig,igcm_dust_number)=pdqsc(ig,igcm_dust_number)
995	& +scav_dust_number(1)
996	endif
997	if (freedust.AND.microphys) then
998	pdqsc(ig,igcm_dust_mass)=pdqsc(ig,igcm_dust_mass)
999	& +scav_ccn_mass(1)
1000	pdqsc(ig,igcm_dust_number)=pdqsc(ig,igcm_dust_number)
1001	& +scav_ccn_number(1)
1002	endif
1003	if (water) then
1004	pdqsc(ig,igcm_h2o_ice)=scav_h2o_ice(1)
1005	endif
1006
1007	ENDDO ! loop on ngrid
1008
1009	END SUBROUTINE scavenging_by_co2
1010
1011	END MODULE co2condens_mod

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