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newcondens.F @ 706

Last change on this file since 706 was 328, checked in by acolaitis, 13 years ago
Sorry about that, I pasted it from an other routine so I mixed nlay and nlayer
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1	SUBROUTINE newcondens(ngrid,nlayer,nq,ptimestep,
2	$ pcapcal,pplay,pplev,ptsrf,pt,
3	$ pphi,pdt,pdu,pdv,pdtsrf,pu,pv,pq,pdq,
4	$ piceco2,psolaralb,pemisurf,
5	$ pdtc,pdtsrfc,pdpsrf,pduc,pdvc,pdqc,
6	$ fluxsurf_sw,zls)
7
8	IMPLICIT NONE
9	c=======================================================================
10	c subject:
11	c --------
12	c Condensation/sublimation of CO2 ice on the ground and in the
13	c atmosphere
14	c (Scheme described in Forget et al., Icarus, 1998)
15	c
16	c author: Francois Forget 1994-1996
17	c ------
18	c
19	c input:
20	c -----
21	c ngrid nombre de points de verticales
22	c (toutes les boucles de la physique sont au
23	c moins vectorisees sur ngrid)
24	c nlayer nombre de couches
25	c pplay(ngrid,nlayer) Pressure levels
26	c pplev(ngrid,nlayer+1) Pressure levels
27	c pt(ngrid,nlayer) temperature (en K)
28	c ptsrf(ngrid) temperature de surface
29	c
30	c \
31	c pdt(ngrid,nlayermx) \ derivee temporelle physique avant condensation
32	c / ou sublimation pour pt,ptsrf
33	c pdtsrf(ngrid) /
34	c
35	c output:
36	c -------
37	c
38	c pdpsrf(ngrid) \ derivee temporelle physique (contribution de
39	c pdtc(ngrid,nlayermx) / la condensation ou sublimation) pour Ps,pt,ptsrf
40	c pdtsrfc(ngrid) /
41	c
42	c Entree/sortie
43	c -------------
44	c
45	c piceco2(ngrid) : quantite de glace co2 au sol (kg/m2)
46	c psolaralb(ngrid,2) : albedo au sol
47	c pemisurf(ngrid) : emissivite du sol
48
49	c
50	c=======================================================================
51	c
52	c 0. Declarations :
53	c ------------------
54	c
55	#include "dimensions.h"
56	#include "dimphys.h"
57	#include "comcstfi.h"
58	#include "surfdat.h"
59	#include "comgeomfi.h"
60	#include "comvert.h"
61	#include "paramet.h"
62	#include "callkeys.h"
63	#include "tracer.h"
64
65	c-----------------------------------------------------------------------
66	c Arguments :
67	c ---------
68	INTEGER ngrid, nlayer, nq
69
70	REAL ptimestep
71	REAL pplay(ngrid,nlayer),pplev(ngrid,nlayer+1)
72	REAL pcapcal(ngrid)
73	REAL pt(ngrid,nlayer)
74	REAL ptsrf(ngrid)
75	REAL pphi(ngrid,nlayer)
76	REAL pdt(ngrid,nlayer),pdtsrf(ngrid),pdtc(ngrid,nlayer)
77	REAL pdtsrfc(ngrid),pdpsrf(ngrid)
78	REAL piceco2(ngrid),psolaralb(ngrid,2),pemisurf(ngrid)
79
80	REAL pu(ngrid,nlayer) , pv(ngrid,nlayer)
81	REAL pdu(ngrid,nlayer) , pdv(ngrid,nlayer)
82	REAL pduc(ngrid,nlayer) , pdvc(ngrid,nlayer)
83	REAL pq(ngridmx,nlayer,nq),pdq(ngrid,nlayer,nq)
84	REAL pdqc(ngrid,nlayer,nq)
85	REAL fluxsurf_sw(ngrid,2) ! added to calculate flux dependent albedo
86	real zls ! solar longitude (rad)
87	c
88	c Local variables :
89	c -----------------
90
91	c variables used for albedo parametrization
92	c --------------------------------------------
93	INTEGER i,j
94	REAL Fluxmean(jjp1)
95	INTEGER l,ig,iq,icap,nmix
96	LOGICAL transparency, fluxdependent
97	c flag transparency if you want to make the co2ice semi-transparent
98	PARAMETER(transparency=.true.)
99	c flag fluxdependent if you want the co2ice albedo to be dependent on
100	c the incident solar flux
101	PARAMETER(fluxdependent=.false.)
102	REAL slopy,alpha,constA,constB,constT,albediceF_new(ngridmx)
103	REAL zt(ngridmx,nlayermx)
104	REAL zcpi
105	REAL ztcond (ngridmx,nlayermx+1)
106	REAL ztcondsol(ngridmx)
107	REAL zdiceco2(ngridmx)
108	REAL zcondicea(ngridmx,nlayermx)
109	REAL zcondices(ngridmx)
110	REAL zfallice(ngridmx,nlayermx+1) , zfallheat
111	REAL zmflux(nlayermx+1)
112	REAL zu(nlayermx),zv(nlayermx)
113	REAL zq(nlayermx,nqmx),zq1(nlayermx)
114	REAL ztsrf(ngridmx)
115	REAL ztc(nlayermx), ztm(nlayermx+1)
116	REAL zum(nlayermx+1) , zvm(nlayermx+1)
117	REAL zqm(nlayermx+1,nqmx),zqm1(nlayermx+1)
118	REAL masse(nlayermx),w(nlayermx+1)
119	REAL Sm(nlayermx),Smq(nlayermx,nqmx),mixmas,qmix
120	LOGICAL condsub(ngridmx)
121
122	c variable speciale diagnostique
123	real tconda1(ngridmx,nlayermx)
124	real tconda2(ngridmx,nlayermx)
125	c REAL zdiceco2a(ngridmx) ! for diagnostic only
126	real zdtsig (ngridmx,nlayermx)
127	real zdt (ngridmx,nlayermx)
128	real vmr_co2(ngridmx,nlayermx) ! co2 volume mixing ratio
129	! improved_ztcond flag: If set to .true. (AND running with a 'co2' tracer)
130	! then condensation temperature is computed using partial pressure of CO2
131	logical,parameter :: improved_ztcond=.true.
132	! Bound co2 (tracer) values...
133	logical,parameter :: bound_qco2=.false.
134	real,parameter :: qco2max=1.1
135	real,parameter :: qco2mini=0.1
136	real :: zqco2
137
138	c local saved variables
139	integer ico2
140	real qco2min,qco2,mmean
141	save ico2,qco2min
142	REAL emisref(ngridmx)
143	REAL latcond,tcond1mb
144	REAL acond,bcond,ccond,cpice
145	! REAL albediceF(ngridmx)
146	SAVE emisref
147	SAVE latcond,acond,bcond,ccond,cpice
148	! SAVE albediceF
149	real m_co2, m_noco2, A , B
150	save A, B, m_co2, m_noco2
151
152	LOGICAL firstcall !,firstcall2
153	SAVE firstcall !,firstcall2
154	! REAL SSUM
155	! EXTERNAL SSUM
156
157	DATA latcond,tcond1mb/5.9e5,136.27/
158	DATA cpice /1000./
159	DATA firstcall/.true./
160	! DATA firstcall2/.true./
161
162	integer flag
163
164	c----------------------------------------------------------------------
165
166	c Initialisation
167	c --------------
168	c
169	IF (firstcall) THEN
170	bcond=1./tcond1mb
171	ccond=cpp/(g*latcond)
172	acond=r/latcond
173
174	firstcall=.false.
175	write(,) 'Newcondens: improved_ztcond=',improved_ztcond
176	write(,) 'Newcondens: bound_qco2=',bound_qco2
177	PRINT*,'In newcondens:Tcond(P=1mb)=',tcond1mb,' Lcond=',latcond
178	PRINT*,'acond,bcond,ccond',acond,bcond,ccond
179
180	ico2=0
181
182	if (tracer) then
183	c Prepare Special treatment if one of the tracer is CO2 gas
184	do iq=1,nqmx
185	if (noms(iq).eq."co2") then
186	ico2=iq
187	m_co2 = 44.01E-3 ! CO2 molecular mass (kg/mol)
188	m_noco2 = 33.37E-3 ! Non condensible mol mass (kg/mol)
189	c Compute A and B coefficient use to compute
190	c mean molecular mass Mair defined by
191	c 1/Mair = q(ico2)/m_co2 + (1-q(ico2))/m_noco2
192	c 1/Mair = A*q(ico2) + B
193	A =(1/m_co2 - 1/m_noco2)
194	B=1/m_noco2
195	endif
196	enddo
197	c minimum CO2 mix. ratio below which mixing occur with layer above:
198	qco2min =0.75
199	end if
200	ENDIF
201	zcpi=1./cpp
202	c
203	c======================================================================
204	c Calcul of CO2 condensation sublimation
205	c ============================================================
206	c
207	c Used variable :
208	c piceco2(ngrid) : amount of co2 ice on the ground (kg/m2)
209	c zcondicea(ngrid,l): condensation rate in layer l (kg/m2/s)
210	c zcondices(ngrid): condensation rate on the ground (kg/m2/s)
211	c zfallice(ngrid,l):amount of ice falling from layer l (kg/m2/s)
212	c
213	c pdtc(ngrid,nlayermx) : dT/dt due to cond/sub
214	c
215	c
216	c Tendencies set to 0 (except pdtc)
217	c -------------------------------------
218	DO l=1,nlayer
219	DO ig=1,ngrid
220	zcondicea(ig,l) = 0.
221	zfallice(ig,l) = 0.
222	pduc(ig,l) = 0
223	pdvc(ig,l) = 0
224	END DO
225	END DO
226
227	DO iq=1,nqmx
228	DO l=1,nlayer
229	DO ig=1,ngrid
230	pdqc(ig,l,iq) = 0
231	END DO
232	END DO
233	END DO
234
235	DO ig=1,ngrid
236	zfallice(ig,nlayer+1) = 0.
237	zcondices(ig) = 0.
238	pdtsrfc(ig) = 0.
239	pdpsrf(ig) = 0.
240	condsub(ig) = .false.
241	zdiceco2(ig) = 0.
242	ENDDO
243	zfallheat=0
244
245	c *************************
246	c ATMOSPHERIC CONDENSATION
247	c *************************
248
249	c Compute CO2 Volume mixing ratio
250	c -------------------------------
251	if (improved_ztcond.and.(ico2.ne.0)) then
252	DO l=1,nlayer
253	DO ig=1,ngrid
254	qco2=pq(ig,l,ico2)+pdq(ig,l,ico2)*ptimestep
255	c Mean air molecular mass = 1/(q(ico2)/m_co2 + (1-q(ico2))/m_noco2)
256	mmean=1/(A*qco2 +B)
257	vmr_co2(ig,l) = qco2*mmean/m_co2
258	ENDDO
259	ENDDO
260	else
261	DO l=1,nlayer
262	DO ig=1,ngrid
263	vmr_co2(ig,l)=0.95
264	ENDDO
265	ENDDO
266	end if
267
268	c forecast of atmospheric temperature zt and frost temperature ztcond
269	c --------------------------------------------------------------------
270
271	DO l=1,nlayer
272	DO ig=1,ngrid
273	zt(ig,l)=pt(ig,l)+ pdt(ig,l)*ptimestep
274	! ztcond(ig,l)=1./(bcond-acondlog(.0095pplay(ig,l)))
275	ztcond(ig,l)=
276	& 1./(bcond-acondlog(.01vmr_co2(ig,l)*pplay(ig,l)))
277	if (pplay(ig,l).lt.1e-4) ztcond(ig,l)=0.0 !mars Monica
278	ENDDO
279	ENDDO
280
281	ztcond(:,nlayer+1)=ztcond(:,nlayer)
282
283	c Condensation/sublimation in the atmosphere
284	c ------------------------------------------
285	c (calcul of zcondicea , zfallice and pdtc)
286	c
287	DO l=nlayer , 1, -1
288	DO ig=1,ngrid
289	pdtc(ig,l)=0.
290	IF((zt(ig,l).LT.ztcond(ig,l)).or.(zfallice(ig,l+1).gt.0))THEN
291	condsub(ig)=.true.
292	IF (zfallice(ig,l+1).gt.0) then
293	zfallheat=zfallice(ig,l+1)*
294	& (pphi(ig,l+1)-pphi(ig,l) +
295	& cpice*(ztcond(ig,l+1)-ztcond(ig,l)))/latcond
296	ELSE
297	zfallheat=0.
298	ENDIF
299	pdtc(ig,l)=(ztcond(ig,l) - zt(ig,l))/ptimestep
300	zcondicea(ig,l)=(pplev(ig,l)-pplev(ig,l+1))
301	& ccondpdtc(ig,l)- zfallheat
302	c Case when the ice from above sublimes entirely
303	c """""""""""""""""""""""""""""""""""""""""""""""
304	IF (zfallice(ig,l+1).lt.- zcondicea(ig,l)) then
305	pdtc(ig,l)=(-zfallice(ig,l+1)+zfallheat)/
306	& (ccond*(pplev(ig,l)-pplev(ig,l+1)))
307	zcondicea(ig,l)= -zfallice(ig,l+1)
308	END IF
309
310	zfallice(ig,l) = zcondicea(ig,l)+zfallice(ig,l+1)
311	END IF
312	ENDDO
313	ENDDO
314
315	c *************************
316	c SURFACE CONDENSATION
317	c *************************
318
319	c forecast of ground temperature ztsrf and frost temperature ztcondsol
320	c --------------------------------------------------------------------
321	DO ig=1,ngrid
322	ztcondsol(ig)=
323	& 1./(bcond-acondlog(.01vmr_co2(ig,1)*pplev(ig,1)))
324	ztsrf(ig) = ptsrf(ig) + pdtsrf(ig)*ptimestep
325	ENDDO
326
327	c
328	c Condensation/sublimation on the ground
329	c --------------------------------------
330	c (calcul of zcondices , pdtsrfc)
331	c
332	DO ig=1,ngrid
333	IF(ig.GT.ngrid/2+1) THEN
334	icap=2
335	ELSE
336	icap=1
337	ENDIF
338
339	c
340	c Loop on where we have condensation/ sublimation
341	IF ((ztsrf(ig) .LT. ztcondsol(ig)) .OR. ! ground cond
342	$ (zfallice(ig,1).NE.0.) .OR. ! falling snow
343	$ ((ztsrf(ig) .GT. ztcondsol(ig)) .AND. ! ground sublim.
344	$ ((piceco2(ig)+zfallice(ig,1)*ptimestep) .NE. 0.))) THEN
345	condsub(ig) = .true.
346
347	IF (zfallice(ig,1).gt.0) then
348	zfallheat=zfallice(ig,1)*
349	& (pphi(ig,1)- phisfi(ig) +
350	& cpice(ztcond(ig,1)-ztcondsol(ig)))/(latcondptimestep)
351	ELSE
352	zfallheat=0.
353	ENDIF
354
355	c condensation or partial sublimation of CO2 ice
356	c """""""""""""""""""""""""""""""""""""""""""""""
357	zcondices(ig)=pcapcal(ig)*(ztcondsol(ig)-ztsrf(ig))
358	& /(latcond*ptimestep) - zfallheat
359	pdtsrfc(ig) = (ztcondsol(ig) - ztsrf(ig))/ptimestep
360
361	c If the entire CO_2 ice layer sublimes
362	c """"""""""""""""""""""""""""""""""""""""""""""""""""
363	c (including what has just condensed in the atmosphere)
364
365	IF((piceco2(ig)/ptimestep+zfallice(ig,1)).LE.
366	& -zcondices(ig))THEN
367	zcondices(ig) = -piceco2(ig)/ptimestep - zfallice(ig,1)
368	pdtsrfc(ig)=(latcond/pcapcal(ig))*
369	& (zcondices(ig)+zfallheat)
370	END IF
371
372	c Changing CO2 ice amount and pressure :
373	c """"""""""""""""""""""""""""""""""""
374
375	zdiceco2(ig) = zcondices(ig) + zfallice(ig,1)
376	piceco2(ig) = piceco2(ig) + zdiceco2(ig)*ptimestep
377	pdpsrf(ig) = -zdiceco2(ig)*g
378
379	IF(ABS(pdpsrf(ig)*ptimestep).GT.pplev(ig,1)) THEN
380	PRINT*,'STOP in condens'
381	PRINT*,'condensing more than total mass'
382	PRINT*,'Grid point ',ig
383	PRINT*,'Ps = ',pplev(ig,1)
384	PRINT*,'d Ps = ',pdpsrf(ig)
385	STOP
386	ENDIF
387	END IF ! if there is condensation/sublimmation
388	ENDDO ! of DO ig=1,ngrid
389
390	c ********************************************************************
391	c Surface albedo and emissivity of the surface below the snow (emisref)
392	c ********************************************************************
393	c Prepare the case where albedo varies with insolation:
394	c ----------------------------------------------------
395	! if (fluxdependent) then
396	!
397	c Calcul du flux moyen (zonal mean)
398	! do j=1,jjp1
399	! Fluxmean(j)=0
400	! do i=1,iim
401	! ig=1+(j-2)*iim +i
402	! if(j.eq.1) ig=1
403	! if(j.eq.jjp1) ig=ngrid
404	! Fluxmean(j)=Fluxmean(j)+fluxsurf_sw(ig,1)
405	! $ +fluxsurf_sw(ig,2)
406	! enddo
407	! Fluxmean(j)=Fluxmean(j)/float(iim)
408	! enddo
409	!
410	c const A and B used to calculate the albedo which depends on solar flux
411	c albedice=constA+constB*Flux
412	c constT = time step to calculate the solar flux when flux decreases
413	! constA=0.26
414	c constA=0.33
415	c constA=0.186
416	! constB=0.00187
417	! constT=10
418	! endif ! of if (fluxdependent)
419
420	! Check that amont of CO2 ice is not problematic
421	DO ig=1,ngrid
422	if(.not.piceco2(ig).ge.0.) THEN
423	if(piceco2(ig).le.-5.e-8) print*,
424	$ 'WARNING newcondens piceco2(',ig,')=', piceco2(ig)
425	piceco2(ig)=0.
426	endif
427	ENDDO
428
429	! Set albedo and emissivity of the surface
430	! ----------------------------------------
431	CALL albedocaps(zls,ngrid,piceco2,psolaralb,emisref)
432
433	c Calcul de l'albedo
434	c ------------------
435	! do ig =1,ngrid
436	! IF(ig.GT.ngrid/2+1) THEN
437	! icap=2
438	! ELSE
439	! icap=1
440	! ENDIF
441	! IF(firstcall2) THEN
442	! albediceF(ig)=albedice(icap)
443	! ENDIF
444	c if there is still co2ice ccccccccccccccccccccccc
445	! if (piceco2(ig).gt.0) then
446	! emisref(ig) = emisice(icap)
447
448	c if flux dependent albedo is used
449	c --------------------------------
450	! if (fluxdependent) then
451	! j=INT((ig-2)/iim)+2
452	! if(ig.eq.1) j=1
453	! if(ig.eq.ngrid) j=jjp1
454	c albediceF_new(ig)=MIN(constA+constB*Fluxmean(j),
455	c $ constA+constB*250)
456	! albediceF_new(ig)=constA+constB*Fluxmean(j)
457	! if (albediceF(ig).gt.albediceF_new(ig)) then
458	! albediceF(ig)=albediceF(ig)+ ptimestep/(daysec*
459	! $ constT)*(albediceF_new(ig)-albediceF(ig))
460	! else
461	! albediceF(ig)=albediceF_new(ig)
462	! endif
463	c if part of the ice is transparent
464	c slopy = pente de la droite: alpha = y*co2ice/1620
465	c pour une valeur superieur a une epaisseur de glace donnee
466	c ici, epaisseur limite = 10cm
467	! if (transparency) then
468	! slopy=1/(1620*0.10)
469	! alpha=MIN(slopy*piceco2(ig),1.)
470	! psolaralb(ig,1) = alpha*albediceF(ig)
471	! $ +(1-alpha)*albedodat(ig)
472	! psolaralb(ig,2) = psolaralb(ig,1)
473	! else
474	! psolaralb(ig,1) = albediceF(ig)
475	! psolaralb(ig,2) = psolaralb(ig,1)
476	! endif
477	! else
478	c transparency set to true and fluxdependent set to false
479	! if (transparency) then
480	! slopy=1/(1620*0.10)
481	! alpha=MIN(slopy*piceco2(ig),1.)
482	! psolaralb(ig,1) = alpha*albedice(icap)
483	! $ +(1-alpha)*albedodat(ig)
484	! psolaralb(ig,2) = psolaralb(ig,1)
485	! else
486	c simplest case: transparency and flux dependent set to false
487	! psolaralb(ig,1) = albedice(icap)
488	! psolaralb(ig,2) = albedice(icap)
489	! endif
490	! endif
491	c no more co2ice, albedo = ground albedo
492	! else
493	! psolaralb(ig,1) = albedodat(ig)
494	! psolaralb(ig,2) = albedodat(ig)
495	! emisref(ig) = emissiv
496	! pemisurf(ig) = emissiv
497	! endif
498	! end do ! end of the ig loop
499
500	! set pemisurf() to emissiv when there is bare surface (needed for co2snow)
501	DO ig=1,ngrid
502	if (piceco2(ig).eq.0) then
503	pemisurf(ig)=emissiv
504	endif
505	ENDDO
506
507	! firstcall2=.false.
508	c ***************************************************************
509	c Correction to account for redistribution between sigma or hybrid
510	c layers when changing surface pressure (and warming/cooling
511	c of the CO2 currently changing phase).
512	c *************************************************************
513
514	DO ig=1,ngrid
515	if (condsub(ig)) then
516	do l=1,nlayer
517	ztc(l) =zt(ig,l) +pdtc(ig,l) *ptimestep
518	zu(l) =pu(ig,l) +pdu( ig,l) *ptimestep
519	zv(l) =pv(ig,l) +pdv( ig,l) *ptimestep
520	do iq=1,nqmx
521	zq(l,iq)=pq(ig,l,iq)+pdq(ig,l,iq)*ptimestep
522	enddo
523	end do
524
525	c Mass fluxes through the sigma levels (kg.m-2.s-1) (>0 when up)
526	c """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
527
528	zmflux(1) = -zcondices(ig)
529	DO l=1,nlayer
530	zmflux(l+1) = zmflux(l) -zcondicea(ig,l)
531	& + (bp(l)-bp(l+1))*(zfallice(ig,1)-zmflux(1))
532	c zmflux set to 0 if very low to avoid: top layer is disappearing in v1ld
533	if (abs(zmflux(l+1)).lt.1E-13.OR.bp(l+1).eq.0.) zmflux(l+1)=0.
534	END DO
535
536	c Mass of each layer
537	c ------------------
538	DO l=1,nlayer
539	masse(l)=(pplev(ig,l) - pplev(ig,l+1))/g
540	END DO
541
542
543	c Corresponding fluxes for T,U,V,Q
544	c """"""""""""""""""""""""""""""""
545
546	c averaging operator for TRANSPORT
547	c """"""""""""""""""""""""""""""""
548	c Value transfert at the surface interface when condensation
549	c sublimation:
550	ztm(1) = ztsrf(ig) + pdtsrfc(ig)*ptimestep
551	zum(1) = 0
552	zvm(1) = 0
553	do iq=1,nqmx
554	zqm(1,iq)=0. ! most tracer do not condense !
555	enddo
556	c Special case if one of the tracer is CO2 gas
557	if (ico2.ne.0) zqm(1,ico2)=1. ! flux is 100% CO2
558
559	c Van Leer scheme:
560	DO l=1,nlayer+1
561	w(l)=-zmflux(l)*ptimestep
562	END DO
563	call vl1d(ztc,2.,masse,w,ztm)
564	call vl1d(zu ,2.,masse,w,zum)
565	call vl1d(zv ,2.,masse,w,zvm)
566	do iq=1,nqmx
567	do l=1,nlayer
568	zq1(l)=zq(l,iq)
569	enddo
570	zqm1(1)=zqm(1,iq)
571	call vl1d(zq1,2.,masse,w,zqm1)
572	do l=2,nlayer
573	zq( l,iq)=zq1(l)
574	zqm(l,iq)=zqm1(l)
575	enddo
576	enddo
577
578	c Surface condensation affects low winds
579	if (zmflux(1).lt.0) then
580	zum(1)= zu(1) * (w(1)/masse(1))
581	zvm(1)= zv(1) * (w(1)/masse(1))
582	if (w(1).gt.masse(1)) then ! ensure numerical stability
583	zum(1)= (zu(1)-zum(2))*masse(1)/w(1) + zum(2)
584	zvm(1)= (zv(1)-zvm(2))*masse(1)/w(1) + zvm(2)
585	end if
586	end if
587
588	ztm(nlayer+1)= ztc(nlayer) ! should not be used, but...
589	zum(nlayer+1)= zu(nlayer) ! should not be used, but...
590	zvm(nlayer+1)= zv(nlayer) ! should not be used, but...
591	do iq=1,nqmx
592	zqm(nlayer+1,iq)= zq(nlayer,iq)
593	enddo
594
595	#ifdef MESOSCALE
596	!!!! AS: This part must be commented in the mesoscale model
597	!!!! AS: ... to avoid instabilities.
598	!!!! AS: you have to compile with -DMESOSCALE to do so
599	#else
600	c Tendencies on T, U, V, Q
601	c """"""""""""""""""""""""
602	DO l=1,nlayer
603
604	c Tendencies on T
605	zdtsig(ig,l) = (1/masse(l)) *
606	& ( zmflux(l)*(ztm(l) - ztc(l))
607	& - zmflux(l+1)*(ztm(l+1) - ztc(l))
608	& + zcondicea(ig,l)*(ztcond(ig,l)-ztc(l)) )
609	pdtc(ig,l) = pdtc(ig,l) + zdtsig(ig,l)
610
611	c Tendencies on U
612	pduc(ig,l) = (1/masse(l)) *
613	& ( zmflux(l)*(zum(l) - zu(l))
614	& - zmflux(l+1)*(zum(l+1) - zu(l)) )
615
616
617	c Tendencies on V
618	pdvc(ig,l) = (1/masse(l)) *
619	& ( zmflux(l)*(zvm(l) - zv(l))
620	& - zmflux(l+1)*(zvm(l+1) - zv(l)) )
621
622	END DO
623	#endif
624
625	c Tendencies on Q
626	do iq=1,nqmx
627	! if (noms(iq).eq.'co2') then
628	if (iq.eq.ico2) then
629	c SPECIAL Case when the tracer IS CO2 :
630	DO l=1,nlayer
631	pdqc(ig,l,iq)= (1/masse(l)) *
632	& ( zmflux(l)*(zqm(l,iq) - zq(l,iq))
633	& - zmflux(l+1)*(zqm(l+1,iq) - zq(l,iq))
634	& + zcondicea(ig,l)*(zq(l,iq)-1.) )
635	END DO
636	else
637	DO l=1,nlayer
638	pdqc(ig,l,iq)= (1/masse(l)) *
639	& ( zmflux(l)*(zqm(l,iq) - zq(l,iq))
640	& - zmflux(l+1)*(zqm(l+1,iq) - zq(l,iq))
641	& + zcondicea(ig,l)*zq(l,iq) )
642	END DO
643	end if
644	enddo
645
646	c --------------------------------------------------------
647	c Roughly Simulate Molecular mixing when CO2 is too depleted by
648	c Surface condensation (mixing starts if qco2 < qco2min )
649	c FF 06/2004
650	c WARNING : this is now done in convadj, better (FF 02/2005)
651	c --------------------------------------------------------
652	flag=0 ! now done in convadj : must be =0
653	if (flag.eq.1) then
654	if(ico2.gt.0) then ! relevant only if one tracer is CO2
655	if(pq(ig,1,ico2)+(pdq(ig,1,ico2)+pdqc(ig,1,ico2))*ptimestep
656	& .lt.qco2min) then
657	do iq=1,nqmx
658	zq(1,iq)=pq(ig,1,iq)
659	& +(pdq(ig,1,iq)+pdqc(ig,1,iq))*ptimestep
660	Smq(1,iq) = masse(1)*zq(1,iq)
661	end do
662	Sm(1) = masse(1)
663	do l =2,nlayermx
664	do iq=1,nqmx
665	zq(l,iq)=pq(ig,l,iq)
666	& +(pdq(ig,l,iq)+pdqc(ig,l,iq))*ptimestep
667	smq(l,iq) = smq(l-1,iq) + masse(l)*zq(l,iq)
668	end do
669	sm(l) = sm(l-1) + masse(l)
670	if(zq(l,ico2).gt.qco2min) then
671	c mixmas: mass of atmosphere that must be mixed to reach qco2min
672	mixmas = (sm(l-1)*zq(l,ico2)-Smq(l-1,ico2))
673	& /(zq(l,ico2)-qco2min)
674	if((mixmas.le.sm(l)))then
675	c OK if mixed mass less than mass of layers affected
676	nmix=l ! number of layer affected by mixing
677	goto 99
678	end if
679	end if
680	end do
681	99 continue
682	do iq=1,nqmx
683	qmix=zq(nmix,iq)
684	& +(Smq(nmix-1,iq)-zq(nmix,iq)*Sm(nmix-1))/mixmas
685	do l=1,nmix-1
686	pdqc(ig,l,iq)=
687	& (qmix-pq(ig,l,iq))/ptimestep - pdq(ig,l,iq)
688	end do
689	c layer only partly mixed :
690	pdqc(ig,nmix,iq)=(
691	& qmix+(Sm(nmix)-mixmas)*(zq(nmix,iq)-qmix)/masse(nmix)
692	& -pq(ig,nmix,iq))/ptimestep -pdq(ig,nmix,iq)
693
694	end do
695	end if
696	end if
697
698	endif ! (flag.eq.1)
699	end if ! if (condsub)
700	END DO ! loop on ig
701
702	c ***************************************************************
703	c CO2 snow / clouds scheme
704	c ***************************************************************
705
706	call co2snow(ngrid,nlayer,ptimestep,emisref,condsub,pplev,
707	& zcondicea,zcondices,zfallice,pemisurf)
708
709	c ***************************************************************
710	c Ecriture des diagnostiques
711	c ***************************************************************
712
713	c DO l=1,nlayer
714	c DO ig=1,ngrid
715	c Taux de cond en kg.m-2.pa-1.s-1
716	c tconda1(ig,l)=zcondicea(ig,l)/(pplev(ig,l)-pplev(ig,l+1))
717	c Taux de cond en kg.m-3.s-1
718	c tconda2(ig,l)=tconda1(ig,l)pplay(ig,l)g/(r*pt(ig,l))
719	c END DO
720	c END DO
721	c call WRITEDIAGFI(ngridmx,'tconda1',
722	c &'Taux de condensation CO2 atmospherique /Pa',
723	c & 'kg.m-2.Pa-1.s-1',3,tconda1)
724	c call WRITEDIAGFI(ngridmx,'tconda2',
725	c &'Taux de condensation CO2 atmospherique /m',
726	c & 'kg.m-3.s-1',3,tconda2)
727
728	! output falling co2 ice in 1st layer:
729	! call WRITEDIAGFI(ngridmx,'fallice',
730	! &'Precipitation of co2 ice',
731	! & 'kg.m-2.s-1',2,zfallice(1,1))
732
733	!! Specific stuff to bound co2 tracer values ....
734	if (bound_qco2.and.(ico2.ne.0)) then
735	do ig=1,ngridmx
736	do l=1,nlayermx
737	zqco2=pq(ig,l,ico2)
738	& +(pdq(ig,l,ico2)+pdqc(ig,l,ico2))*ptimestep
739	if (zqco2.gt.qco2max) then
740	! correct pdqc:
741	pdqc(ig,l,ico2)=((qco2max-pq(ig,l,ico2))/ptimestep)
742	& -pdq(ig,l,ico2)
743	write(,) "newcondens: adapting pdqc(ig,l,ico2)",
744	& " so that co2 conc. does not exceed",qco2max
745	write(,) " ig:",ig," l:",l
746	endif ! of if (zqco2.gt.qco2max)
747	if (zqco2.lt.qco2mini) then
748	! correct pdqc:
749	pdqc(ig,l,ico2)=((qco2mini-pq(ig,l,ico2))/ptimestep)
750	& -pdq(ig,l,ico2)
751	write(,) "newcondens: adapting pdqc(ig,l,ico2)",
752	& " so that co2 conc. is not less than",qco2mini
753	write(,) " ig:",ig," l:",l
754	endif ! of if (zqco2.lt.qco2mini)
755	end do
756	enddo
757	endif ! of if (bound_qco2.and.(ico2.ne.0)) then
758
759	return
760	end
761
762
763
764	c *****************************************************************
765	SUBROUTINE vl1d(q,pente_max,masse,w,qm)
766	c
767	c
768	c Operateur de moyenne inter-couche pour calcul de transport type
769	c Van-Leer " pseudo amont " dans la verticale
770	c q,w sont des arguments d'entree pour le s-pg ....
771	c masse : masse de la couche Dp/g
772	c w : masse d'atm ``transferee'' a chaque pas de temps (kg.m-2)
773	c pente_max = 2 conseillee
774	c
775	c
776	c --------------------------------------------------------------------
777	IMPLICIT NONE
778
779	#include "dimensions.h"
780
781	c
782	c
783	c
784	c Arguments:
785	c ----------
786	real masse(llm),pente_max
787	REAL q(llm),qm(llm+1)
788	REAL w(llm+1)
789	c
790	c Local
791	c ---------
792	c
793	INTEGER l
794	c
795	real dzq(llm),dzqw(llm),adzqw(llm),dzqmax
796	real sigw, Mtot, MQtot
797	integer m
798	c integer ismax,ismin
799
800
801	c On oriente tout dans le sens de la pression
802	c W > 0 WHEN DOWN !!!!!!!!!!!!!
803
804	do l=2,llm
805	dzqw(l)=q(l-1)-q(l)
806	adzqw(l)=abs(dzqw(l))
807	enddo
808
809	do l=2,llm-1
810	if(dzqw(l)*dzqw(l+1).gt.0.) then
811	dzq(l)=0.5*(dzqw(l)+dzqw(l+1))
812	else
813	dzq(l)=0.
814	endif
815	dzqmax=pente_max*min(adzqw(l),adzqw(l+1))
816	dzq(l)=sign(min(abs(dzq(l)),dzqmax),dzq(l))
817	enddo
818
819	dzq(1)=0.
820	dzq(llm)=0.
821
822	do l = 1,llm-1
823
824	c Regular scheme (transfered mass < layer mass)
825	c ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
826	if(w(l+1).gt.0. .and. w(l+1).le.masse(l+1)) then
827	sigw=w(l+1)/masse(l+1)
828	qm(l+1)=(q(l+1)+0.5(1.-sigw)dzq(l+1))
829	else if(w(l+1).le.0. .and. -w(l+1).le.masse(l)) then
830	sigw=w(l+1)/masse(l)
831	qm(l+1)=(q(l)-0.5(1.+sigw)dzq(l))
832
833	c Extended scheme (transfered mass > layer mass)
834	c ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
835	else if(w(l+1).gt.0.) then
836	m=l+1
837	Mtot = masse(m)
838	MQtot = masse(m)*q(m)
839	do while ((m.lt.llm).and.(w(l+1).gt.(Mtot+masse(m+1))))
840	m=m+1
841	Mtot = Mtot + masse(m)
842	MQtot = MQtot + masse(m)*q(m)
843	end do
844	if (m.lt.llm) then
845	sigw=(w(l+1)-Mtot)/masse(m+1)
846	qm(l+1)= (1/w(l+1))(MQtot + (w(l+1)-Mtot)
847	& (q(m+1)+0.5(1.-sigw)dzq(m+1)) )
848	else
849	w(l+1) = Mtot
850	qm(l+1) = Mqtot / Mtot
851	write(,) 'top layer is disapearing !'
852	stop
853	end if
854	else ! if(w(l+1).lt.0)
855	m = l-1
856	Mtot = masse(m+1)
857	MQtot = masse(m+1)*q(m+1)
858	if (m.gt.0) then ! because some compilers will have problems
859	! evaluating masse(0)
860	do while ((m.gt.0).and.(-w(l+1).gt.(Mtot+masse(m))))
861	m=m-1
862	Mtot = Mtot + masse(m+1)
863	MQtot = MQtot + masse(m+1)*q(m+1)
864	if (m.eq.0) exit
865	end do
866	endif
867	if (m.gt.0) then
868	sigw=(w(l+1)+Mtot)/masse(m)
869	qm(l+1)= (-1/w(l+1))(MQtot + (-w(l+1)-Mtot)
870	& (q(m)-0.5(1.+sigw)dzq(m)) )
871	else
872	qm(l+1)= (-1/w(l+1))(MQtot + (-w(l+1)-Mtot)qm(1))
873	end if
874	end if
875	enddo
876
877	c boundary conditions (not used in newcondens !!)
878	c qm(llm+1)=0.
879	c if(w(1).gt.0.) then
880	c qm(1)=q(1)
881	c else
882	c qm(1)=0.
883	c end if
884
885	return
886	end

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