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co2condens_mod.F @ 2156

Last change on this file since 2156 was 2155, checked in by aslmd, 5 years ago
another thing done in the CO2 physics that is not suitable for mesoscale, to be corrected
File size: 27.8 KB

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1	MODULE co2condens_mod
2
3	IMPLICIT NONE
4
5	CONTAINS
6
7	SUBROUTINE co2condens(ngrid,nlayer,nq,ptimestep,
8	$ pcapcal,pplay,pplev,ptsrf,pt,
9	$ pphi,pdt,pdu,pdv,pdtsrf,pu,pv,pq,pdq,
10	$ piceco2,psolaralb,pemisurf,
11	$ pdtc,pdtsrfc,pdpsrf,pduc,pdvc,pdqc,
12	$ fluxsurf_sw,zls,
13	$ zdqssed_co2,pcondicea_co2microp,
14	$ zdtcloudco2)
15
16	use tracer_mod, only: noms
17	use surfdat_h, only: emissiv, phisfi
18	use geometry_mod, only: latitude, ! grid point latitudes (rad)
19	& longitude_deg, latitude_deg
20	use planete_h, only: obliquit
21	use comcstfi_h, only: cpp, g, r, pi
22	#ifndef MESOSCALE
23	USE vertical_layers_mod, ONLY: ap, bp
24	#endif
25	IMPLICIT NONE
26	c=======================================================================
27	c subject:
28	c --------
29	c Condensation/sublimation of CO2 ice on the ground and in the
30	c atmosphere
31	c (Scheme described in Forget et al., Icarus, 1998)
32	c
33	c author: Francois Forget 1994-1996 ; updated 1996 -- 2018
34	c ------
35	c adapted to external CO2 ice clouds scheme by Deborah Bardet (2018) '
36	c
37	c=======================================================================
38	c
39	c 0. Declarations :
40	c ------------------
41	c
42	include "callkeys.h"
43
44	c-----------------------------------------------------------------------
45	c Arguments :
46	c ---------
47	INTEGER,INTENT(IN) :: ngrid ! number of atmospheric columns
48	INTEGER,INTENT(IN) :: nlayer ! number of vertical layers
49	INTEGER,INTENT(IN) :: nq ! number of tracers
50
51	REAL,INTENT(IN) :: ptimestep ! physics timestep (s)
52	REAL,INTENT(IN) :: pcapcal(ngrid)
53	REAL,INTENT(IN) :: pplay(ngrid,nlayer) !mid-layer pressure (Pa)
54	REAL,INTENT(IN) :: pplev(ngrid,nlayer+1) ! inter-layer pressure (Pa)
55	REAL,INTENT(IN) :: ptsrf(ngrid) ! surface temperature (K)
56	REAL,INTENT(IN) :: pt(ngrid,nlayer) ! atmospheric temperature (K)
57	REAL,INTENT(IN) :: pphi(ngrid,nlayer) ! geopotential (m2.s-2)
58	REAL,INTENT(IN) :: pdt(ngrid,nlayer) ! tendency on temperature from
59	! previous physical processes (K/s)
60	REAL,INTENT(IN) :: pdu(ngrid,nlayer) ! tendency on zonal wind (m/s2)
61	! from previous physical processes
62	REAL,INTENT(IN) :: pdv(ngrid,nlayer) ! tendency on meridional wind (m/s2)
63	! from previous physical processes
64	REAL,INTENT(IN) :: pdtsrf(ngrid) ! tendency on surface temperature from
65	! previous physical processes (K/s)
66	REAL,INTENT(IN) :: pu(ngrid,nlayer) ! zonal wind (m/s)
67	REAL,INTENT(IN) :: pv(ngrid,nlayer) ! meridional wind (m/s)
68	REAL,INTENT(IN) :: pq(ngrid,nlayer,nq) ! tracers (../kg_air)
69	REAL,INTENT(IN) :: pdq(ngrid,nlayer,nq) ! tendency on tracers from
70	! previous physical processes
71
72	REAL,INTENT(IN) :: zdqssed_co2(ngrid) ! CO2 flux at the surface (kg.m-2.s-1)
73	REAL,INTENT(IN) :: pcondicea_co2microp(ngrid,nlayer)! tendency due to CO2 condensation (kg/kg.s-1)
74	REAL,INTENT(IN) :: zdtcloudco2(ngrid,nlayer) ! tendency on temperature due to latent heat
75
76	REAL,INTENT(INOUT) :: piceco2(ngrid) ! CO2 ice on the surface (kg.m-2)
77	REAL,INTENT(INOUT) :: psolaralb(ngrid,2) ! albedo of the surface
78	REAL,INTENT(INOUT) :: pemisurf(ngrid) ! emissivity of the surface
79
80	! tendencies due to CO2 condensation/sublimation:
81	REAL,INTENT(OUT) :: pdtc(ngrid,nlayer) ! tendency on temperature (K/s)
82	REAL,INTENT(OUT) :: pdtsrfc(ngrid) ! tendency on surface temperature (K/s)
83	REAL,INTENT(OUT) :: pdpsrf(ngrid) ! tendency on surface pressure (Pa/s)
84	REAL,INTENT(OUT) :: pduc(ngrid,nlayer) ! tendency on zonal wind (m.s-2)
85	REAL,INTENT(OUT) :: pdvc(ngrid,nlayer) ! tendency on meridional wind (m.s-2)
86	REAL,INTENT(OUT) :: pdqc(ngrid,nlayer,nq) ! tendency on tracers
87
88	! added to calculate flux dependent albedo:
89	REAL,intent(in) :: fluxsurf_sw(ngrid,2)
90	real,intent(in) :: zls ! solar longitude (rad)
91
92	c
93	c Local variables :
94	c -----------------
95
96	INTEGER i,j
97	INTEGER l,ig,iq,icap
98	REAL zt(ngrid,nlayer)
99	REAL zcpi
100	REAL ztcond (ngrid,nlayer+1) ! CO2 condensation temperature (atm)
101	REAL ztcondsol(ngrid) ! CO2 condensation temperature (surface)
102	REAL zdiceco2(ngrid)
103	REAL zcondicea(ngrid,nlayer) ! condensation rate in layer l (kg/m2/s)
104	REAL zcondices(ngrid) ! condensation rate on the ground (kg/m2/s)
105	REAL zfallice(ngrid,nlayer+1) ! amount of ice falling from layer l (kg/m2/s)
106	REAL zfallheat
107	REAL zmflux(nlayer+1)
108	REAL zu(nlayer),zv(nlayer)
109	REAL zq(nlayer,nq),zq1(nlayer)
110	REAL ztsrf(ngrid)
111	REAL ztc(nlayer), ztm(nlayer+1)
112	REAL zum(nlayer+1) , zvm(nlayer+1)
113	REAL zqm(nlayer+1,nq),zqm1(nlayer+1)
114	REAL masse(nlayer),w(nlayer+1)
115	REAL Sm(nlayer),Smq(nlayer,nq),mixmas,qmix
116	REAL availco2
117	LOGICAL condsub(ngrid)
118
119	real :: emisref(ngrid)
120
121	c variable speciale diagnostique
122	real tconda1(ngrid,nlayer)
123	real tconda2(ngrid,nlayer)
124	c REAL zdiceco2a(ngrid) ! for diagnostic only
125	real zdtsig (ngrid,nlayer)
126	real zdt (ngrid,nlayer)
127	real vmr_co2(ngrid,nlayer) ! co2 volume mixing ratio
128	! improved_ztcond flag: If set to .true. (AND running with a 'co2' tracer)
129	! then condensation temperature is computed using partial pressure of CO2
130	logical,parameter :: improved_ztcond=.true.
131
132	c local saved variables
133	integer,save :: ico2 ! index of CO2 tracer
134	real,save :: qco2,mmean
135	real,parameter :: latcond=5.9e5 ! (J/kg) Latent heat of solid CO2 ice
136	real,parameter :: tcond1mb=136.27 ! condensation temperature (K) at 1 mbar
137	real,parameter :: cpice=1000. ! (J.kg-1.K-1) specific heat of CO2 ice
138	REAL,SAVE :: acond,bcond,ccond
139	real,save :: m_co2, m_noco2, A , B
140
141	LOGICAL,SAVE :: firstcall = .true. !,firstcall2=.true.
142
143	c D.BARDET: for debug
144	real ztc3D(ngrid,nlayer)
145	REAL ztm3D(ngrid,nlayer)
146	REAL zmflux3D(ngrid,nlayer)
147	c----------------------------------------------------------------------
148
149	c Initialisation
150	c --------------
151	c
152	! AS: firstcall OK absolute
153	IF (firstcall) THEN
154
155	bcond=1./tcond1mb
156	ccond=cpp/(g*latcond)
157	acond=r/latcond
158
159	firstcall=.false.
160	write(,) 'CO2condens: improved_ztcond=',improved_ztcond
161	PRINT*,'In co2condens:Tcond(P=1mb)=',tcond1mb,' Lcond=',latcond
162	PRINT*,'acond,bcond,ccond',acond,bcond,ccond
163
164	ico2=0
165
166	if (tracer) then
167	c Prepare Special treatment if one of the tracer is CO2 gas
168	do iq=1,nq
169	if (noms(iq).eq."co2") then
170	ico2=iq
171	m_co2 = 44.01E-3 ! CO2 molecular mass (kg/mol)
172	m_noco2 = 33.37E-3 ! Non condensible mol mass (kg/mol)
173	c Compute A and B coefficient use to compute
174	c mean molecular mass Mair defined by
175	c 1/Mair = q(ico2)/m_co2 + (1-q(ico2))/m_noco2
176	c 1/Mair = A*q(ico2) + B
177	A =(1/m_co2 - 1/m_noco2)
178	B=1/m_noco2
179	endif
180	enddo
181	end if
182	ENDIF ! of IF (firstcall)
183	zcpi=1./cpp
184
185	c
186	c======================================================================
187	c Calcul of CO2 condensation sublimation
188	c ============================================================
189	c
190	c Used variable :
191	c piceco2(ngrid) : amount of co2 ice on the ground (kg/m2)
192	c zcondicea(ngrid,l): condensation rate in layer l (kg/m2/s)
193	c zcondices(ngrid): condensation rate on the ground (kg/m2/s)
194	c zfallice(ngrid,l):amount of ice falling from layer l (kg/m2/s)
195	c
196	c pdtc(ngrid,nlayer) : dT/dt due to cond/sub
197	c
198	c
199	c Tendencies set to 0 (except pdtc)
200	c -------------------------------------
201	DO l=1,nlayer
202	DO ig=1,ngrid
203	zcondicea(ig,l) = 0.
204	zfallice(ig,l) = 0.
205	pduc(ig,l) = 0
206	pdvc(ig,l) = 0
207	END DO
208	END DO
209
210	DO iq=1,nq
211	DO l=1,nlayer
212	DO ig=1,ngrid
213	pdqc(ig,l,iq) = 0
214	END DO
215	END DO
216	END DO
217
218	DO ig=1,ngrid
219	zfallice(ig,nlayer+1) = 0.
220	zcondices(ig) = 0.
221	pdtsrfc(ig) = 0.
222	pdpsrf(ig) = 0.
223	condsub(ig) = .false.
224	zdiceco2(ig) = 0.
225	ENDDO
226	zfallheat=0
227
228	c *************************
229	c ATMOSPHERIC CONDENSATION
230	c *************************
231
232	c Compute CO2 Volume mixing ratio
233	c -------------------------------
234	if (improved_ztcond.and.(ico2.ne.0)) then
235	DO l=1,nlayer
236	DO ig=1,ngrid
237	qco2=pq(ig,l,ico2)+pdq(ig,l,ico2)*ptimestep
238	c Mean air molecular mass = 1/(q(ico2)/m_co2 + (1-q(ico2))/m_noco2)
239	mmean=1/(A*qco2 +B)
240	vmr_co2(ig,l) = qco2*mmean/m_co2
241	ENDDO
242	ENDDO
243	else
244	DO l=1,nlayer
245	DO ig=1,ngrid
246	vmr_co2(ig,l)=0.95
247	ENDDO
248	ENDDO
249	end if
250
251	IF (.NOT. co2clouds) then
252	c forecast of atmospheric temperature zt and frost temperature ztcond
253	c --------------------------------------------------------------------
254
255	DO l=1,nlayer
256	DO ig=1,ngrid
257	zt(ig,l)=pt(ig,l)+ pdt(ig,l)*ptimestep
258	! ztcond(ig,l)=1./(bcond-acondlog(.0095pplay(ig,l)))
259	if (pplay(ig,l).ge.1e-4) then
260	ztcond(ig,l)=
261	& 1./(bcond-acondlog(.01vmr_co2(ig,l)*pplay(ig,l)))
262	else
263	ztcond(ig,l)=0.0 !mars Monica
264	endif
265	ENDDO
266	ENDDO
267
268	ztcond(:,nlayer+1)=ztcond(:,nlayer)
269
270	c Condensation/sublimation in the atmosphere
271	c ------------------------------------------
272	c (calcul of zcondicea , zfallice and pdtc)
273	c
274	DO l=nlayer , 1, -1
275	DO ig=1,ngrid
276	pdtc(ig,l)=0.
277	IF((zt(ig,l).LT.ztcond(ig,l)).or.(zfallice(ig,l+1).gt.0))THEN
278	condsub(ig)=.true.
279	IF (zfallice(ig,l+1).gt.0) then
280	zfallheat=zfallice(ig,l+1)*
281	& (pphi(ig,l+1)-pphi(ig,l) +
282	& cpice*(ztcond(ig,l+1)-ztcond(ig,l)))/latcond
283	ELSE
284	zfallheat=0.
285	ENDIF
286	pdtc(ig,l)=(ztcond(ig,l) - zt(ig,l))/ptimestep
287	zcondicea(ig,l)=(pplev(ig,l)-pplev(ig,l+1))
288	& ccondpdtc(ig,l)- zfallheat
289	c Case when the ice from above sublimes entirely
290	c """""""""""""""""""""""""""""""""""""""""""""""
291	IF (zfallice(ig,l+1).lt.- zcondicea(ig,l)) then
292	pdtc(ig,l)=(-zfallice(ig,l+1)+zfallheat)/
293	& (ccond*(pplev(ig,l)-pplev(ig,l+1)))
294	zcondicea(ig,l)= -zfallice(ig,l+1)
295	END IF
296
297	zfallice(ig,l) = zcondicea(ig,l)+zfallice(ig,l+1)
298	END IF
299	ENDDO
300	ENDDO
301
302	ELSE
303
304	DO ig=1,ngrid
305	zfallice(ig,1) = zdqssed_co2(ig)
306	ENDDO
307	DO l=nlayer , 1, -1
308	DO ig=1,ngrid
309	zcondicea(ig,l) = pcondicea_co2microp(ig,l)*
310	& (pplev(ig,l) - pplev(ig,l+1))/g
311	ENDDO
312	ENDDO
313	DO l=nlayer, 1, -1
314	DO ig=1, ngrid
315	zt(ig,l)=pt(ig,l)+ pdt(ig,l)*ptimestep
316	pdtc(ig,l)=0.
317	ENDDO
318	ENDDO
319	ENDIF ! if not co2clouds
320
321	call WRITEdiagfi(ngrid,"pdtc_atm",
322	& "temperature tendency due to CO2 condensation",
323	& " ",3,pdtc)
324
325	call WRITEdiagfi(ngrid,"zcondicea",
326	& "",
327	& " ",3,zcondicea)
328
329	call WRITEdiagfi(ngrid,"zfallice",
330	& "",
331	& " ",2,zfallice(ngrid,1))
332
333	c *************************
334	c SURFACE CONDENSATION
335	c *************************
336
337	c forecast of ground temperature ztsrf and frost temperature ztcondsol
338	c --------------------------------------------------------------------
339	DO ig=1,ngrid
340	ztcondsol(ig)=
341	& 1./(bcond-acondlog(.01vmr_co2(ig,1)*pplev(ig,1)))
342	ztsrf(ig) = ptsrf(ig) + pdtsrf(ig)*ptimestep
343	ENDDO
344
345	c
346	c Condensation/sublimation on the ground
347	c --------------------------------------
348	c (compute zcondices and pdtsrfc)
349	c
350	DO ig=1,ngrid
351	IF(latitude(ig).lt.0) THEN
352	! Southern hemisphere
353	icap=2
354	ELSE
355	! Northern hemisphere
356	icap=1
357	ENDIF
358
359	c
360	c Loop on where we have condensation/ sublimation
361	IF ((ztsrf(ig) .LT. ztcondsol(ig)) .OR. ! ground cond
362	$ (zfallice(ig,1).NE.0.) .OR. ! falling snow
363	$ ((ztsrf(ig) .GT. ztcondsol(ig)) .AND. ! ground sublim.
364	$ ((piceco2(ig)+zfallice(ig,1)*ptimestep) .NE. 0.))) THEN
365	condsub(ig) = .true.
366
367	IF (zfallice(ig,1).gt.0) then
368	zfallheat=zfallice(ig,1)*
369	& (pphi(ig,1)- phisfi(ig) +
370	& cpice*(ztcond(ig,1)-ztcondsol(ig)))/latcond
371	ELSE
372	zfallheat=0.
373	ENDIF
374
375	c condensation or partial sublimation of CO2 ice
376	c """""""""""""""""""""""""""""""""""""""""""""""
377	zcondices(ig)=pcapcal(ig)*(ztcondsol(ig)-ztsrf(ig))
378	& /(latcond*ptimestep) - zfallheat
379	pdtsrfc(ig) = (ztcondsol(ig) - ztsrf(ig))/ptimestep
380	zdiceco2(ig) = zcondices(ig) + zfallice(ig,1)
381
382	#ifdef MESOSCALE
383	print*, "not enough CO2 tracer in 1st layer to condense"
384	print*, ">>> to be implemented in the mesoscale case"
385	print*, "because this uses ap levels..."
386	#else
387	c If there is not enough CO2 tracer in 1st layer to condense
388	c """"""""""""""""""""""""""""""""""""""""""""""""""""""
389	IF(ico2.ne.0) then
390	c Available CO2 tracer in layer 1 at end of timestep (kg/m2)
391	availco2= pq(ig,1,ico2)*((ap(1)-ap(2))+
392	& (bp(1)-bp(2))(pplev(ig,1)/g-zdiceco2(ig)ptimestep))
393
394	IF ((zcondices(ig) + zcondicea(ig,1))*ptimestep
395	& .gt.availco2) then
396	zcondices(ig) = availco2/ptimestep -zcondicea(ig,1)
397	zdiceco2(ig) = zcondices(ig) + zfallice(ig,1)
398	pdtsrfc(ig)=(latcond/pcapcal(ig))*
399	& (zcondices(ig)+zfallheat)
400	ENDIF
401	ENDIF
402	#endif
403
404	c If the entire CO_2 ice layer sublimes
405	c """"""""""""""""""""""""""""""""""""""""""""""""""""
406	c (including what has just condensed in the atmosphere)
407
408	IF((piceco2(ig)/ptimestep+zfallice(ig,1)).LE.
409	& -zcondices(ig))THEN
410	zcondices(ig) = -piceco2(ig)/ptimestep - zfallice(ig,1)
411	pdtsrfc(ig)=(latcond/pcapcal(ig))*
412	& (zcondices(ig)+zfallheat)
413	zdiceco2(ig) = zcondices(ig) + zfallice(ig,1)
414	END IF
415
416	c Changing CO2 ice amount and pressure :
417	c """"""""""""""""""""""""""""""""""""
418
419	piceco2(ig) = piceco2(ig) + zdiceco2(ig)*ptimestep
420	pdpsrf(ig) = -zdiceco2(ig)*g
421
422	IF(ABS(pdpsrf(ig)*ptimestep).GT.pplev(ig,1)) THEN
423	PRINT*,'STOP in condens'
424	PRINT*,'condensing more than total mass'
425	PRINT*,'Grid point ',ig
426	PRINT*,'Longitude(degrees): ',longitude_deg(ig)
427	PRINT*,'Latitude(degrees): ',latitude_deg(ig)
428	PRINT*,'Ps = ',pplev(ig,1)
429	PRINT*,'d Ps = ',pdpsrf(ig)
430	STOP
431	ENDIF
432	END IF ! if there is condensation/sublimmation
433	ENDDO ! of DO ig=1,ngrid
434
435	c ********************************************************************
436	c Surface albedo and emissivity of the surface below the snow (emisref)
437	c ********************************************************************
438
439	! Check that amont of CO2 ice is not problematic
440	DO ig=1,ngrid
441	if(.not.piceco2(ig).ge.0.) THEN
442	if(piceco2(ig).le.-5.e-8) print*,
443	$ 'WARNING co2condens piceco2(',ig,')=', piceco2(ig)
444	piceco2(ig)=0.
445	endif
446	ENDDO
447
448	! Set albedo and emissivity of the surface
449	! ----------------------------------------
450	CALL albedocaps(zls,ngrid,piceco2,psolaralb,emisref)
451
452	! set pemisurf() to emissiv when there is bare surface (needed for co2snow)
453	DO ig=1,ngrid
454	if (piceco2(ig).eq.0) then
455	pemisurf(ig)=emissiv
456	endif
457	ENDDO
458
459	! firstcall2=.false.
460	c ***************************************************************
461	c Correction to account for redistribution between sigma or hybrid
462	c layers when changing surface pressure (and warming/cooling
463	c of the CO2 currently changing phase).
464	c *************************************************************
465
466	DO ig=1,ngrid
467	if (condsub(ig)) then
468	do l=1,nlayer
469	ztc(l) =zt(ig,l) +pdtc(ig,l) *ptimestep
470	zu(l) =pu(ig,l) +pdu( ig,l) *ptimestep
471	zv(l) =pv(ig,l) +pdv( ig,l) *ptimestep
472	do iq=1,nq
473	zq(l,iq)=pq(ig,l,iq)+pdq(ig,l,iq)*ptimestep
474	enddo
475	end do
476
477	c Mass fluxes through the sigma levels (kg.m-2.s-1) (>0 when up)
478	c """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
479
480	zmflux(1) = -zcondices(ig)
481	DO l=1,nlayer
482	zmflux(l+1) = zmflux(l) -zcondicea(ig,l)
483	#ifndef MESOSCALE
484	& + (bp(l)-bp(l+1))*(zfallice(ig,1)-zmflux(1))
485	c zmflux set to 0 if very low to avoid: top layer is disappearing in v1ld
486	if (abs(zmflux(l+1)).lt.1E-13.OR.bp(l+1).eq.0.) zmflux(l+1)=0.
487	#else
488	if (abs(zmflux(l+1)).lt.1E-13) zmflux(l+1)=0.
489	#endif
490	END DO
491
492	#ifdef MESOSCALE
493	print*,"absurd mass set because bp not available"
494	print*,"TO BE FIXED"
495	#else
496	c Mass of each layer at the end of timestep
497	c -----------------------------------------
498	DO l=1,nlayer
499	masse(l)=( pplev(ig,l) - pplev(ig,l+1) +
500	& (bp(l)-bp(l+1))pdpsrf(ig)ptimestep)/g
501	END DO
502	#endif
503
504	c Corresponding fluxes for T,U,V,Q
505	c """"""""""""""""""""""""""""""""
506
507	c averaging operator for TRANSPORT
508	c """"""""""""""""""""""""""""""""
509	c Value transfert at the surface interface when condensation
510	c sublimation:
511	ztm(1) = ztsrf(ig) + pdtsrfc(ig)*ptimestep
512	zum(1) = 0
513	zvm(1) = 0
514	do iq=1,nq
515	zqm(1,iq)=0. ! most tracer do not condense !
516	enddo
517	c Special case if one of the tracer is CO2 gas
518	if (ico2.ne.0) zqm(1,ico2)=1. ! flux is 100% CO2
519
520	c Van Leer scheme:
521	DO l=1,nlayer+1
522	w(l)=-zmflux(l)*ptimestep
523	END DO
524	call vl1d(nlayer,ztc,2.,masse,w,ztm)
525	call vl1d(nlayer,zu ,2.,masse,w,zum)
526	call vl1d(nlayer,zv ,2.,masse,w,zvm)
527	do iq=1,nq
528	do l=1,nlayer
529	zq1(l)=zq(l,iq)
530	enddo
531	zqm1(1)=zqm(1,iq)
532	call vl1d(nlayer,zq1,2.,masse,w,zqm1)
533	do l=2,nlayer
534	zq( l,iq)=zq1(l)
535	zqm(l,iq)=zqm1(l)
536	enddo
537	enddo
538
539	c Surface condensation affects low winds
540	if (zmflux(1).lt.0) then
541	zum(1)= zu(1) * (w(1)/masse(1))
542	zvm(1)= zv(1) * (w(1)/masse(1))
543	if (w(1).gt.masse(1)) then ! ensure numerical stability
544	zum(1)= (zu(1)-zum(2))*masse(1)/w(1) + zum(2)
545	zvm(1)= (zv(1)-zvm(2))*masse(1)/w(1) + zvm(2)
546	end if
547	end if
548
549	ztm(nlayer+1)= ztc(nlayer) ! should not be used, but...
550	zum(nlayer+1)= zu(nlayer) ! should not be used, but...
551	zvm(nlayer+1)= zv(nlayer) ! should not be used, but...
552	do iq=1,nq
553	zqm(nlayer+1,iq)= zq(nlayer,iq)
554	enddo
555
556	#ifdef MESOSCALE
557	!!!! AS: This part must be commented in the mesoscale model
558	!!!! AS: ... to avoid instabilities.
559	!!!! AS: you have to compile with -DMESOSCALE to do so
560	#else
561	c Tendencies on T, U, V, Q
562	c """"""""""""""""""""""""
563	DO l=1,nlayer
564	IF(.not. co2clouds) THEN
565	c Tendencies on T
566	zdtsig(ig,l) = (1/masse(l)) *
567	& ( zmflux(l)*(ztm(l) - ztc(l))
568	& - zmflux(l+1)*(ztm(l+1) - ztc(l))
569	& + zcondicea(ig,l)*(ztcond(ig,l)-ztc(l)) )
570	ELSE
571	zdtsig(ig,l) = (1/masse(l)) *
572	& ( zmflux(l)*(ztm(l) - ztc(l))
573	& - zmflux(l+1)*(ztm(l+1) - ztc(l)))
574	ENDIF
575	c D.BARDET: for diagnotics
576	zmflux3D(ig,l)=zmflux(l)
577	ztm3D(ig,l)=ztm(l)
578	ztc3D(ig,l)=ztc(l)
579
580	pdtc(ig,l) = pdtc(ig,l) + zdtsig(ig,l)
581
582	c Tendencies on U
583	pduc(ig,l) = (1/masse(l)) *
584	& ( zmflux(l)*(zum(l) - zu(l))
585	& - zmflux(l+1)*(zum(l+1) - zu(l)) )
586
587
588	c Tendencies on V
589	pdvc(ig,l) = (1/masse(l)) *
590	& ( zmflux(l)*(zvm(l) - zv(l))
591	& - zmflux(l+1)*(zvm(l+1) - zv(l)) )
592
593	END DO
594
595	#endif
596
597	c Tendencies on Q
598	do iq=1,nq
599	! if (noms(iq).eq.'co2') then
600	if (iq.eq.ico2) then
601	c SPECIAL Case when the tracer IS CO2 :
602	DO l=1,nlayer
603	pdqc(ig,l,iq)= (1/masse(l)) *
604	& ( zmflux(l)*(zqm(l,iq) - zq(l,iq))
605	& - zmflux(l+1)*(zqm(l+1,iq) - zq(l,iq))
606	& + zcondicea(ig,l)*(zq(l,iq)-1.) )
607	END DO
608	else
609	DO l=1,nlayer
610	pdqc(ig,l,iq)= (1/masse(l)) *
611	& ( zmflux(l)*(zqm(l,iq) - zq(l,iq))
612	& - zmflux(l+1)*(zqm(l+1,iq) - zq(l,iq))
613	& + zcondicea(ig,l)*zq(l,iq) )
614	END DO
615	end if
616	enddo
617
618	end if ! if (condsub)
619	END DO ! loop on ig
620
621	c ***************************************************************
622	c CO2 snow / clouds scheme
623	c ***************************************************************
624
625	call co2snow(ngrid,nlayer,ptimestep,emisref,condsub,pplev,
626	& zcondicea,zcondices,zfallice,pemisurf)
627
628	c ***************************************************************
629	c Ecriture des diagnostiques
630	c ***************************************************************
631
632	c DO l=1,nlayer
633	c DO ig=1,ngrid
634	c Taux de cond en kg.m-2.pa-1.s-1
635	c tconda1(ig,l)=zcondicea(ig,l)/(pplev(ig,l)-pplev(ig,l+1))
636	c Taux de cond en kg.m-3.s-1
637	c tconda2(ig,l)=tconda1(ig,l)pplay(ig,l)g/(r*pt(ig,l))
638	c END DO
639	c END DO
640	c call WRITEDIAGFI(ngrid,'tconda1',
641	c &'Taux de condensation CO2 atmospherique /Pa',
642	c & 'kg.m-2.Pa-1.s-1',3,tconda1)
643	c call WRITEDIAGFI(ngrid,'tconda2',
644	c &'Taux de condensation CO2 atmospherique /m',
645	c & 'kg.m-3.s-1',3,tconda2)
646
647	! output falling co2 ice in 1st layer:
648	! call WRITEDIAGFI(ngrid,'fallice',
649	! &'Precipitation of co2 ice',
650	! & 'kg.m-2.s-1',2,zfallice(1,1))
651
652	#ifndef MESOSCALE
653	! Extra special case for surface temperature tendency pdtsrfc:
654	! we want to fix the south pole temperature to CO2 condensation temperature
655	if (caps.and.(obliquit.lt.27.)) then
656	! check if last grid point is the south pole
657	if (abs(latitude(ngrid)-(-pi/2.)).lt.1.e-5) then
658	! NB: Updated surface pressure, at grid point 'ngrid', is
659	! ps(ngrid)=pplev(ngrid,1)+pdpsrf(ngrid)*ptimestep
660	! write(,) "co2condens: South pole: latitude(ngrid)=",
661	! & latitude(ngrid)
662	ztcondsol(ngrid)=
663	& 1./(bcond-acondlog(.01vmr_co2(ngrid,1)*
664	& (pplev(ngrid,1)+pdpsrf(ngrid)*ptimestep)))
665	pdtsrfc(ngrid)=(ztcondsol(ngrid)-ztsrf(ngrid))/ptimestep
666	endif
667	endif
668	#endif
669
670	END SUBROUTINE co2condens
671
672
673
674	c *****************************************************************
675	SUBROUTINE vl1d(nlayer,q,pente_max,masse,w,qm)
676	c
677	c
678	c Operateur de moyenne inter-couche pour calcul de transport type
679	c Van-Leer " pseudo amont " dans la verticale
680	c q,w sont des arguments d'entree pour le s-pg ....
681	c masse : masse de la couche Dp/g
682	c w : masse d'atm ``transferee'' a chaque pas de temps (kg.m-2)
683	c pente_max = 2 conseillee
684	c
685	c
686	c --------------------------------------------------------------------
687	IMPLICIT NONE
688
689	c
690	c
691	c
692	c Arguments:
693	c ----------
694	integer nlayer
695	real masse(nlayer),pente_max
696	REAL q(nlayer),qm(nlayer+1)
697	REAL w(nlayer+1)
698	c
699	c Local
700	c ---------
701	c
702	INTEGER l
703	c
704	real dzq(nlayer),dzqw(nlayer),adzqw(nlayer),dzqmax
705	real sigw, Mtot, MQtot
706	integer m
707	c integer ismax,ismin
708
709
710	c On oriente tout dans le sens de la pression
711	c W > 0 WHEN DOWN !!!!!!!!!!!!!
712
713	do l=2,nlayer
714	dzqw(l)=q(l-1)-q(l)
715	adzqw(l)=abs(dzqw(l))
716	enddo
717
718	do l=2,nlayer-1
719	if(dzqw(l)*dzqw(l+1).gt.0.) then
720	dzq(l)=0.5*(dzqw(l)+dzqw(l+1))
721	else
722	dzq(l)=0.
723	endif
724	dzqmax=pente_max*min(adzqw(l),adzqw(l+1))
725	dzq(l)=sign(min(abs(dzq(l)),dzqmax),dzq(l))
726	enddo
727
728	dzq(1)=0.
729	dzq(nlayer)=0.
730
731	do l = 1,nlayer-1
732
733	c Regular scheme (transfered mass < layer mass)
734	c ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
735	if(w(l+1).gt.0. .and. w(l+1).le.masse(l+1)) then
736	sigw=w(l+1)/masse(l+1)
737	qm(l+1)=(q(l+1)+0.5(1.-sigw)dzq(l+1))
738	else if(w(l+1).le.0. .and. -w(l+1).le.masse(l)) then
739	sigw=w(l+1)/masse(l)
740	qm(l+1)=(q(l)-0.5(1.+sigw)dzq(l))
741
742	c Extended scheme (transfered mass > layer mass)
743	c ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
744	else if(w(l+1).gt.0.) then
745	m=l+1
746	Mtot = masse(m)
747	MQtot = masse(m)*q(m)
748	do while ((m.lt.nlayer).and.(w(l+1).gt.(Mtot+masse(m+1))))
749	m=m+1
750	Mtot = Mtot + masse(m)
751	MQtot = MQtot + masse(m)*q(m)
752	end do
753	if (m.lt.nlayer) then
754	sigw=(w(l+1)-Mtot)/masse(m+1)
755	qm(l+1)= (1/w(l+1))(MQtot + (w(l+1)-Mtot)
756	& (q(m+1)+0.5(1.-sigw)dzq(m+1)) )
757	else
758	w(l+1) = Mtot
759	qm(l+1) = Mqtot / Mtot
760	write(,) 'top layer is disapearing !'
761	stop
762	end if
763	else ! if(w(l+1).lt.0)
764	m = l-1
765	Mtot = masse(m+1)
766	MQtot = masse(m+1)*q(m+1)
767	if (m.gt.0) then ! because some compilers will have problems
768	! evaluating masse(0)
769	do while ((m.gt.0).and.(-w(l+1).gt.(Mtot+masse(m))))
770	m=m-1
771	Mtot = Mtot + masse(m+1)
772	MQtot = MQtot + masse(m+1)*q(m+1)
773	if (m.eq.0) exit
774	end do
775	endif
776	if (m.gt.0) then
777	sigw=(w(l+1)+Mtot)/masse(m)
778	qm(l+1)= (-1/w(l+1))(MQtot + (-w(l+1)-Mtot)
779	& (q(m)-0.5(1.+sigw)dzq(m)) )
780	else
781	qm(l+1)= (-1/w(l+1))(MQtot + (-w(l+1)-Mtot)qm(1))
782	end if
783	end if
784	enddo
785
786	c boundary conditions (not used in co2condens !!)
787	c qm(nlayer+1)=0.
788	c if(w(1).gt.0.) then
789	c qm(1)=q(1)
790	c else
791	c qm(1)=0.
792	c end if
793
794	END SUBROUTINE vl1d
795
796	END MODULE co2condens_mod

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