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rocketduststorm_mod.F90 @ 2228

Last change on this file since 2228 was 2226, checked in by emillour, 5 years ago
Mars GCM: Bug fix in rocketduststorm & topmons routines; "tauscaling" sould not be a local (moreover uninitialized) variable. Added it to the arguments of the routines. EM
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1	MODULE rocketduststorm_mod
2
3	IMPLICIT NONE
4
5	REAL, SAVE, ALLOCATABLE :: dustliftday(:) ! dust lifting rate (s-1)
6
7	CONTAINS
8
9	!=======================================================================
10	! ROCKET DUST STORM - vertical transport and detrainment
11	!=======================================================================
12	! calculation of the vertical flux
13	! call of van_leer : Van Leer transport scheme of the dust tracers
14	! detrainement of stormdust in the background dust
15	! -----------------------------------------------------------------------
16	! Authors: M. Vals; C. Wang; F. Forget; T. Bertrand
17	! Institution: Laboratoire de Meteorologie Dynamique (LMD) Paris, France
18	! -----------------------------------------------------------------------
19
20	SUBROUTINE rocketduststorm(ngrid,nlayer,nq,ptime,ptimestep, &
21	pq,pdqfi,pt,pdtfi,pplev,pplay,pzlev, &
22	pzlay,pdtsw,pdtlw, &
23	! input for radiative transfer
24	clearatm,icount,zday,zls, &
25	tsurf,igout,totstormfract, &
26	tauscaling, &
27	! input sub-grid scale cloud
28	clearsky,totcloudfrac, &
29	! input sub-grid scale topography
30	nohmons,alpha_hmons, &
31	! output
32	pdqrds,wrad,dsodust,dsords, &
33	tauref)
34
35	USE tracer_mod, only: igcm_stormdust_mass,igcm_stormdust_number &
36	,igcm_dust_mass,igcm_dust_number &
37	,rho_dust
38	USE comcstfi_h, only: r,g,cpp,rcp
39	USE dimradmars_mod, only: albedo,naerkind
40	USE comsaison_h, only: dist_sol,mu0,fract
41	USE surfdat_h, only: emis,co2ice,zmea, zstd, zsig, hmons
42	USE callradite_mod, only: callradite
43	IMPLICIT NONE
44
45	include "callkeys.h"
46
47	!--------------------------------------------------------
48	! Input Variables
49	!--------------------------------------------------------
50
51	INTEGER, INTENT(IN) :: ngrid ! number of horizontal grid points
52	INTEGER, INTENT(IN) :: nlayer ! number of vertical grid points
53	INTEGER, INTENT(IN) :: nq ! number of tracer species
54	REAL, INTENT(IN) :: ptime
55	REAL, INTENT(IN) :: ptimestep
56
57	REAL, INTENT(IN) :: pq(ngrid,nlayer,nq) ! advected field nq
58	REAL, INTENT(IN) :: pdqfi(ngrid,nlayer,nq)! tendancy field pq
59	REAL, INTENT(IN) :: pt(ngrid,nlayer) ! temperature at mid-layer (K)
60	REAL, INTENT(IN) :: pdtfi(ngrid,nlayer) ! tendancy temperature at mid-layer (K)
61
62	REAL, INTENT(IN) :: pplay(ngrid,nlayer) ! pressure at middle of the layers
63	REAL, INTENT(IN) :: pplev(ngrid,nlayer+1) ! pressure at intermediate levels
64	REAL, INTENT(IN) :: pzlay(ngrid,nlayer) ! altitude at the middle of the layers
65	REAL, INTENT(IN) :: pzlev(ngrid,nlayer+1) ! altitude at layer boundaries
66
67	REAL, INTENT(IN) :: pdtsw(ngrid,nlayer) ! (K/s) env
68	REAL, INTENT(IN) :: pdtlw(ngrid,nlayer) ! (K/s) env
69
70	! input for second radiative transfer
71	LOGICAL, INTENT(IN) :: clearatm
72	INTEGER, INTENT(INOUT) :: icount
73	REAL, INTENT(IN) :: zday
74	REAL, INTENT(IN) :: zls
75	REAL, INTENT(IN) :: tsurf(ngrid)
76	INTEGER, INTENT(IN) :: igout
77	REAL, INTENT(IN) :: totstormfract(ngrid)
78	REAL, INTENT(INOUT) :: tauscaling(ngrid)
79
80	! sbgrid scale water ice clouds
81	logical, intent(in) :: clearsky
82	real, intent(in) :: totcloudfrac(ngrid)
83
84	! sbgrid scale topography
85	LOGICAL, INTENT(IN) :: nohmons
86	REAL, INTENT(IN) :: alpha_hmons(ngrid)
87
88	!--------------------------------------------------------
89	! Output Variables
90	!--------------------------------------------------------
91
92	REAL, INTENT(OUT) :: pdqrds(ngrid,nlayer,nq) ! tendancy field for dust when detraining
93	REAL, INTENT(OUT) :: wrad(ngrid,nlayer+1) ! vertical speed within the rocket dust storm
94	REAL, INTENT(OUT) :: dsodust(ngrid,nlayer) ! density scaled opacity of env. dust
95	REAL, INTENT(OUT) :: dsords(ngrid,nlayer) ! density scaled opacity of storm dust
96	REAL, INTENT(OUT) :: tauref(ngrid)
97
98	!--------------------------------------------------------
99	! Local variables
100	!--------------------------------------------------------
101	INTEGER l,ig,iq,ll
102	! local variables from callradite.F
103	REAL zdtlw1(ngrid,nlayer) ! (K/s) storm
104	REAL zdtsw1(ngrid,nlayer) ! (K/s) storm
105	REAL zt(ngrid,nlayer) ! actual temperature at mid-layer (K)
106	REAL zdtvert(ngrid,nlayer) ! dT/dz , lapse rate
107	REAL ztlev(ngrid,nlayer) ! temperature at intermediate levels l+1/2 without last level
108
109	REAL zdtlw1_lev(nlayer),zdtsw1_lev(nlayer) ! rad. heating rate at intermediate levels l+1/2 for stormdust
110	REAL zdtlw_lev(nlayer),zdtsw_lev(nlayer) ! rad. heating rate at intermediate levels l+1/2 for background dust
111
112	REAL zq_stormdust_mass(ngrid,nlayer) ! intermediate tracer stormdust mass
113	REAL zq_stormdust_number(ngrid,nlayer) ! intermediate tracer stormdust number
114	REAL zq_dust_mass(ngrid,nlayer) ! intermediate tracer dust mass
115	REAL zq_dust_number(ngrid,nlayer) ! intermediate tracer dust number
116
117	REAL mr_stormdust_mass(ngrid,nlayer) ! intermediate mixing ratio to calculate van leer transport with the "real" concentration (stormdust mass)
118	REAL mr_stormdust_number(ngrid,nlayer) ! intermediate mixing ratio to calculate van leer transport with the "real" concentration (stormdust number)
119	REAL mr_dust_mass(ngrid,nlayer) ! intermediate mixing ratio to calculate van leer transport with the "real" concentration (dust mass)
120	REAL mr_dust_number(ngrid,nlayer) ! intermediate mixing ratio to calculate van leer transport with the "real" concentration (sdust number)
121
122	REAL dqvl_stormdust_mass(ngrid,nlayer) ! tendancy of vertical transport (stormdust mass)
123	REAL dqvl_stormdust_number(ngrid,nlayer) ! tendancy of vertical transport (stormdust number)
124	REAL dqvl_dust_mass(ngrid,nlayer) ! tendancy of vertical transport (dust mass)
125	REAL dqvl_dust_number(ngrid,nlayer) ! tendancy of vertical transport (dust number)
126	REAL dqdet_stormdust_mass(ngrid,nlayer) ! tendancy of detrainement (stormdust mass)
127	REAL dqdet_stormdust_number(ngrid,nlayer) ! tendancy of detrainement (stormdust number)
128
129	REAL masse_col(nlayer) ! mass of atmosphere (kg/m2)
130	REAL zq(ngrid,nlayer,nq) ! updated tracers
131
132	REAL w(ngrid,nlayer) ! air mass flux (calculated with the vertical wind velocity profile) used as input in Van Leer (kgair/m2)
133	REAL wqmass(ngrid,nlayer+1) ! tracer (dust_mass) mass flux in Van Leer (kg/m2)
134	REAL wqnumber(ngrid,nlayer+1) ! tracer (dust_number) mass flux in Van Leer (kg/m2)
135
136	LOGICAL storm(ngrid) ! true when there is a dust storm (if the opacity is high): trigger the rocket dust storm scheme
137	REAL detrain(ngrid,nlayer) ! coefficient for detrainment : % of stormdust detrained
138	INTEGER scheme(ngrid) ! triggered scheme
139
140	REAL,PARAMETER:: coefmin =0.025 ! 0<coefmin<1 Minimum fraction of stormdust detrained
141	REAL,PARAMETER:: wmin =0.25 ! stormdust detrainment if wrad < wmin
142	REAL,PARAMETER:: wmax =10. ! maximum vertical velocity of the rocket dust storms (m/s)
143
144	! subtimestep
145	INTEGER tsub
146	INTEGER nsubtimestep !number of subtimestep when calling van_leer
147	REAL subtimestep !ptimestep/nsubtimestep
148	REAL dtmax !considered time needed for dust to cross one layer
149	REAL,PARAMETER:: secu=3.!3. !coefficient on wspeed to avoid dust crossing many layers during subtimestep
150
151	! diagnostics
152	REAL lapserate(ngrid,nlayer)
153	REAL deltahr(ngrid,nlayer+1)
154
155	LOGICAL,SAVE :: firstcall=.true.
156
157	! variables for the radiative transfer
158	REAL fluxsurf_lw1(ngrid)
159	REAL fluxsurf_sw1(ngrid,2)
160	REAL fluxtop_lw1(ngrid)
161	REAL fluxtop_sw1(ngrid,2)
162	REAL tau(ngrid,naerkind)
163	REAL aerosol(ngrid,nlayer,naerkind)
164	REAL taucloudtes(ngrid)
165	REAL rdust(ngrid,nlayer)
166	REAL rstormdust(ngrid,nlayer)
167	REAL rtopdust(ngrid,nlayer)
168	REAL rice(ngrid,nlayer)
169	REAL nuice(ngrid,nlayer)
170
171
172	! **********************************************************************
173	! **********************************************************************
174	! Rocket dust storm parametrization to reproduce the detached dust layers
175	! during the dust storm season:
176	! The radiative warming due to the presence of storm dust is
177	! balanced by the adiabatic cooling. The tracer "storm dust"
178	! is transported by the upward/downward flow.
179	! **********************************************************************
180	! **********************************************************************
181	!! 1. Radiative transfer in storm dust
182	!! 2. Compute vertical velocity for storm dust
183	!! case 1 storm = false: nothing to do
184	!! case 2 rocket dust storm (storm=true)
185	!! 3. Vertical transport (Van Leer)
186	!! 4. Detrainment
187	! **********************************************************************
188	! **********************************************************************
189
190
191	! **********************************************************************
192	! Initializations
193	! **********************************************************************
194	storm(:)=.false.
195	pdqrds(:,:,:) = 0.
196	mr_dust_mass(:,:)=0.
197	mr_dust_number(:,:)=0.
198	mr_stormdust_mass(:,:)=0.
199	mr_stormdust_number(:,:)=0.
200	dqvl_dust_mass(:,:)=0.
201	dqvl_dust_number(:,:)=0.
202	dqvl_stormdust_mass(:,:)=0.
203	dqvl_stormdust_number(:,:)=0.
204	dqdet_stormdust_mass(:,:)=0.
205	dqdet_stormdust_number(:,:)=0.
206	wrad(:,:)=0.
207	w(:,:)=0.
208	wqmass(:,:)=0.
209	wqnumber(:,:)=0.
210	zdtvert(:,:)=0.
211	lapserate(:,:)=0.
212	deltahr(:,:)=0.
213	scheme(:)=0
214	detrain(:,:)=1.
215
216	!! no update for the stormdust tracer and temperature fields
217	!! because previous callradite was for background dust
218	zq(1:ngrid,1:nlayer,1:nq)=pq(1:ngrid,1:nlayer,1:nq)
219	zt(1:ngrid,1:nlayer)=pt(1:ngrid,1:nlayer)
220
221
222	zq_dust_mass(1:ngrid,1:nlayer)=zq(1:ngrid,1:nlayer,igcm_dust_mass)
223	zq_dust_number(1:ngrid,1:nlayer)=zq(1:ngrid,1:nlayer,igcm_dust_number)
224	zq_stormdust_mass(1:ngrid,1:nlayer)=zq(1:ngrid,1:nlayer,igcm_stormdust_mass)
225	zq_stormdust_number(1:ngrid,1:nlayer)=zq(1:ngrid,1:nlayer,igcm_stormdust_number)
226
227	! *********************************************************************
228	! 0. Check if there is a storm
229	! *********************************************************************
230	DO ig=1,ngrid
231	storm(ig)=.false.
232	DO l=1,nlayer
233	IF (zq(ig,l,igcm_stormdust_mass) &
234	.gt. zq(ig,l,igcm_dust_mass)*(1.E-4)) THEN
235	storm(ig)=.true.
236	EXIT
237	ENDIF
238	ENDDO
239	ENDDO
240
241	! *********************************************************************
242	! 1. Call the second radiative transfer for stormdust, obtain the extra heating
243	! *********************************************************************
244	CALL callradite(icount,ngrid,nlayer,nq,zday,zls,pq,albedo, &
245	emis,mu0,pplev,pplay,pt,tsurf,fract,dist_sol,igout, &
246	zdtlw1,zdtsw1,fluxsurf_lw1,fluxsurf_sw1,fluxtop_lw1, &
247	fluxtop_sw1,tauref,tau,aerosol,dsodust,tauscaling, &
248	taucloudtes,rdust,rice,nuice,co2ice,rstormdust,rtopdust, &
249	totstormfract,clearatm,dsords,alpha_hmons,nohmons, &
250	clearsky,totcloudfrac)
251
252	! **********************************************************************
253	! 2. Compute vertical velocity for storm dust
254	! **********************************************************************
255	!! **********************************************************************
256	!! 2.1 Nothing to do when no storm
257	!! no storm
258	DO ig=1,ngrid
259	IF (.NOT.(storm(ig))) then
260	scheme(ig)=1
261	cycle
262	ENDIF ! IF (storm(ig))
263	ENDDO ! DO ig=1,ngrid
264
265	!! **********************************************************************
266	!! 2.2 Calculation of the extra heating : computing heating rates
267	!! gradient at boundaries of each layer, start from surface
268	DO ig=1,ngrid
269	IF (storm(ig)) THEN
270
271	scheme(ig)=2
272
273	!! computing heating rates gradient at boundraies of each layer
274	!! start from surface
275	zdtlw1_lev(1)=0.
276	zdtsw1_lev(1)=0.
277	zdtlw_lev(1)=0.
278	zdtsw_lev(1)=0.
279	ztlev(ig,1)=zt(ig,1)
280
281	DO l=1,nlayer-1
282	!! Calculation for the dust storm fraction
283	zdtlw1_lev(l+1)=(zdtlw1(ig,l)*(pzlay(ig,l+1)-pzlev(ig,l+1))+ &
284	zdtlw1(ig,l+1)*(pzlev(ig,l+1)-pzlay(ig,l))) / &
285	(pzlay(ig,l+1)-pzlay(ig,l))
286
287	zdtsw1_lev(l+1)=(zdtsw1(ig,l)*(pzlay(ig,l+1)-pzlev(ig,l+1))+ &
288	zdtsw1(ig,l+1)*(pzlev(ig,l+1)-pzlay(ig,l))) / &
289	(pzlay(ig,l+1)-pzlay(ig,l))
290	!! Calculation for the background dust fraction
291	zdtlw_lev(l+1)=(pdtlw(ig,l)*(pzlay(ig,l+1)-pzlev(ig,l+1))+ &
292	pdtlw(ig,l+1)*(pzlev(ig,l+1)-pzlay(ig,l))) / &
293	(pzlay(ig,l+1)-pzlay(ig,l))
294
295	zdtsw_lev(l+1)=(pdtsw(ig,l)*(pzlay(ig,l+1)-pzlev(ig,l+1))+ &
296	pdtsw(ig,l+1)*(pzlev(ig,l+1)-pzlay(ig,l))) / &
297	(pzlay(ig,l+1)-pzlay(ig,l))
298
299	ztlev(ig,l+1)=(zt(ig,l)*(pzlay(ig,l+1)-pzlev(ig,l+1))+ &
300	zt(ig,l+1)*(pzlev(ig,l+1)-pzlay(ig,l))) / &
301	(pzlay(ig,l+1)-pzlay(ig,l))
302	ENDDO ! DO l=1,nlayer-1
303
304	!! This is the env. lapse rate
305	zdtvert(ig,1)=0.
306	DO l=1,nlayer-1
307	zdtvert(ig,l+1)=(ztlev(ig,l+1)-ztlev(ig,l))/(pzlay(ig,l+1)-pzlay(ig,l))
308	lapserate(ig,l+1)=zdtvert(ig,l+1)
309	ENDDO
310
311	!! **********************************************************************
312	!! 2.3 Calculation of the vertical velocity : extra heating
313	!! balanced by adiabatic cooling
314
315	DO l=1,nlayer
316	deltahr(ig,l)=(zdtlw1_lev(l)+zdtsw1_lev(l)) &
317	-(zdtlw_lev(l)+zdtsw_lev(l))
318	wrad(ig,l)=-deltahr(ig,l)/(g/cpp+ &
319	max(zdtvert(ig,l),-0.99*g/cpp))
320	!! Limit vertical wind in case of lapse rate close to adiabatic
321	wrad(ig,l)=max(wrad(ig,l),-wmax)
322	wrad(ig,l)=min(wrad(ig,l),wmax)
323	ENDDO
324
325	ENDIF ! IF (storm(ig))
326	ENDDO ! DO ig=1,ngrid
327
328	! **********************************************************************
329	! 3. Vertical transport
330	! **********************************************************************
331	!! **********************************************************************
332	!! 3.1 Transport of background dust + storm dust (concentrated)
333	DO ig=1,ngrid
334	IF (storm(ig)) THEN
335	DO l=1,nlayer
336	mr_dust_mass(ig,l) = zq_dust_mass(ig,l)
337	mr_dust_number(ig,l) = zq_dust_number(ig,l)
338	mr_stormdust_mass(ig,l) = zq_dust_mass(ig,l)+ &
339	zq_stormdust_mass(ig,l)/totstormfract(ig)
340	mr_stormdust_number(ig,l) = zq_dust_number(ig,l)+ &
341	zq_stormdust_number(ig,l)/totstormfract(ig)
342	ENDDO ! DO l=1,nlayer
343	ENDIF ! IF (storm(ig))
344	ENDDO ! DO ig=1,ngrid
345
346	DO ig=1,ngrid
347	IF (storm(ig)) THEN
348	!! **********************************************************************
349	!! 3.2 Compute the subtimestep to conserve the mass in the Van Leer transport
350	dtmax=ptimestep
351	DO l=2,nlayer
352	IF (wrad(ig,l).lt.0.) THEN
353	dtmax=min(dtmax,(pzlev(ig,l)-pzlev(ig,l-1))/ &
354	(secu*abs(wrad(ig,l))))
355	ELSE IF (wrad(ig,l).gt.0.) then
356	dtmax=min(dtmax,(pzlev(ig,l+1)-pzlev(ig,l))/ &
357	(secu*abs(wrad(ig,l))))
358	ENDIF
359	ENDDO
360	nsubtimestep= int(ptimestep/dtmax)
361	subtimestep=ptimestep/float(nsubtimestep)
362	!! Mass flux generated by wup in kg/m2
363	DO l=1,nlayer
364	w(ig,l)=wrad(ig,l)pplev(ig,l)/(rztlev(ig,l)) &
365	*subtimestep
366	ENDDO ! l=1,nlayer
367
368	!! **********************************************************************
369	!! 3.3 Vertical transport by a Van Leer scheme
370	!! Mass of atmosphere in the layer
371	DO l=1,nlayer
372	masse_col(l)=(pplev(ig,l)-pplev(ig,l+1))/g
373	ENDDO
374	!! Mass flux in kg/m2 if you are not using the subtimestep
375	!DO l=1,nlayer
376	! w(ig,l)=wrad(ig,l)(pplev(ig,l)/(rztlev(ig,l)))*ptimestep
377	!ENDDO
378	!! Loop over the subtimestep
379	DO tsub=1,nsubtimestep
380	!! Van Leer scheme
381	wqmass(ig,:)=0.
382	wqnumber(ig,:)=0.
383	CALL van_leer(nlayer,mr_stormdust_mass(ig,:),2., &
384	masse_col,w(ig,:),wqmass(ig,:))
385	CALL van_leer(nlayer,mr_stormdust_number(ig,:),2., &
386	masse_col,w(ig,:),wqnumber(ig,:))
387	ENDDO !tsub=...
388
389	ENDIF ! IF storm(ig)
390	ENDDO ! DO ig=1,ngrid
391
392	!! **********************************************************************
393	!! 3.4 Re-calculation of the mixing ratios after vertical transport
394	DO ig=1,ngrid
395	IF (storm(ig)) THEN
396	DO l=1,nlayer
397
398	!! General and "healthy" case
399	IF (mr_stormdust_mass(ig,l).ge.mr_dust_mass(ig,l)) THEN
400	zq_dust_mass(ig,l) = mr_dust_mass(ig,l)
401	zq_dust_number(ig,l) = mr_dust_number(ig,l)
402	zq_stormdust_mass(ig,l) = totstormfract(ig)*(mr_stormdust_mass(ig,l)-mr_dust_mass(ig,l))
403	zq_stormdust_number(ig,l) = totstormfract(ig)*(mr_stormdust_number(ig,l)-mr_dust_number(ig,l))
404	!! Particular case: there is less than initial dust mixing ratio after the vertical transport
405	ELSE
406	zq_dust_mass(ig,l) = (1.-totstormfract(ig))mr_dust_mass(ig,l)+totstormfract(ig)mr_stormdust_mass(ig,l)
407	zq_dust_number(ig,l) = (1.-totstormfract(ig))mr_dust_number(ig,l)+totstormfract(ig)mr_stormdust_number(ig,l)
408	zq_stormdust_mass(ig,l) = 0.
409	zq_stormdust_number(ig,l) = 0.
410	ENDIF
411
412	ENDDO ! DO l=1,nlayer
413	ENDIF ! IF storm(ig)
414	ENDDO ! DO ig=1,ngrid
415
416	!! **********************************************************************
417	!! 3.5 Calculation of the tendencies of the vertical transport
418	DO ig=1,ngrid
419	IF (storm(ig)) THEN
420	DO l=1,nlayer
421	dqvl_stormdust_mass(ig,l) = (zq_stormdust_mass(ig,l)- &
422	zq(ig,l,igcm_stormdust_mass)) /ptimestep
423	dqvl_stormdust_number(ig,l) = (zq_stormdust_number(ig,l)- &
424	zq(ig,l,igcm_stormdust_number)) /ptimestep
425	dqvl_dust_mass(ig,l) = (zq_dust_mass(ig,l)-zq(ig,l,igcm_dust_mass)) /ptimestep
426	dqvl_dust_number(ig,l) = (zq_dust_number(ig,l)-zq(ig,l,igcm_dust_number)) /ptimestep
427	ENDDO
428	ENDIF ! IF storm(ig)
429	ENDDO ! DO ig=1,ngrid
430
431	! **********************************************************************
432	! 4. Detrainment: stormdust is converted to background dust
433	! **********************************************************************
434	!! **********************************************************************
435	!! 4.1 Compute the coefficient of detrainmen
436	DO ig=1,ngrid
437	DO l=1,nlayer
438	IF ((max(abs(wrad(ig,l)),abs(wrad(ig,l+1))) .lt. &
439	wmin) .or. (zq_dust_mass(ig,l) .gt. &
440	10000.*zq_stormdust_mass(ig,l))) THEN
441	detrain(ig,l)=1.
442	ELSE IF (max(abs(wrad(ig,l)),abs(wrad(ig,l+1))) &
443	.le. wmax) THEN
444	detrain(ig,l)=coeff_detrainment* &
445	(((1-coefmin)/(wmin-wmax)*2) &
446	(max(abs(wrad(ig,l)),abs(wrad(ig,l+1)))-wmax)**2 &
447	+coefmin)
448	ELSE IF (max(abs(wrad(ig,l)),abs(wrad(ig,l+1))).gt. wmax ) THEN
449	detrain(ig,l)=coefmin
450	ELSE
451	detrain(ig,l)=coefmin
452	ENDIF
453	ENDDO ! DO l=1,nlayer
454	ENDDO ! DO ig=1,ngrid
455
456	!! **********************************************************************
457	!! 4.2 Calculation of the tendencies of the detrainment
458	DO ig=1,ngrid
459	DO l=1,nlayer
460	dqdet_stormdust_mass(ig,l)=-detrain(ig,l)*zq_stormdust_mass(ig,l) &
461	/ptimestep
462	dqdet_stormdust_number(ig,l)=-detrain(ig,l)*zq_stormdust_number(ig,l) &
463	/ptimestep
464	ENDDO ! DO l=1,nlayer
465	ENDDO ! DO ig=1,ngrid
466
467	! **********************************************************************
468	! 5. Final tendencies: vertical transport + detrainment
469	! **********************************************************************
470	DO ig=1,ngrid
471	DO l=1,nlayer
472	pdqrds(ig,l,igcm_stormdust_mass)=dqdet_stormdust_mass(ig,l) &
473	+dqvl_stormdust_mass(ig,l)
474	pdqrds(ig,l,igcm_stormdust_number)=dqdet_stormdust_number(ig,l) &
475	+dqvl_stormdust_number(ig,l)
476	pdqrds(ig,l,igcm_dust_mass)= -dqdet_stormdust_mass(ig,l) &
477	+dqvl_dust_mass(ig,l)
478	pdqrds(ig,l,igcm_dust_number)= -dqdet_stormdust_number(ig,l) &
479	+dqvl_dust_number(ig,l)
480	ENDDO ! DO l=1,nlayer
481	ENDDO ! DO ig=1,ngrid
482
483	! ! **********************************************************************
484	! ! 6. To prevent from negative values
485	! ! **********************************************************************
486	! DO ig=1,ngrid
487	! DO l=1,nlayer
488	! IF ((pq(ig,l,igcm_stormdust_mass) &
489	! +pdqrds(ig,l,igcm_stormdust_mass)*ptimestep .le. 0.) .or. &
490	! (pq(ig,l,igcm_stormdust_number) &
491	! +pdqrds(ig,l,igcm_stormdust_number)*ptimestep .le. 0.)) THEN
492	! pdqrds(ig,l,igcm_stormdust_mass)=-pq(ig,l,igcm_stormdust_mass)/ptimestep
493	! pdqrds(ig,l,igcm_stormdust_number)=-pq(ig,l,igcm_stormdust_number)/ptimestep
494	! ENDIF
495	! ENDDO ! nlayer
496	! ENDDO ! DO ig=1,ngrid
497	!
498	! DO ig=1,ngrid
499	! DO l=1,nlayer
500	! IF ((pq(ig,l,igcm_dust_mass) &
501	! +pdqrds(ig,l,igcm_dust_mass)*ptimestep .le. 0.) .or. &
502	! (pq(ig,l,igcm_dust_number) &
503	! +pdqrds(ig,l,igcm_dust_number)*ptimestep .le. 0.)) THEN
504	! pdqrds(ig,l,igcm_dust_mass)=-pq(ig,l,igcm_dust_mass)/ptimestep
505	! pdqrds(ig,l,igcm_dust_number)=-pq(ig,l,igcm_dust_number)/ptimestep
506	! ENDIF
507	! ENDDO ! nlayer
508	! ENDDO ! DO ig=1,ngrid
509
510	!=======================================================================
511	! WRITEDIAGFI
512
513	call WRITEDIAGFI(ngrid,'lapserate','lapse rate in the storm', &
514	& 'k/m',3,lapserate)
515	call WRITEDIAGFI(ngrid,'deltahr','extra heating rates', &
516	& 'K/s',3,deltahr)
517	call writediagfi(ngrid,'scheme','which scheme',&
518	' ',2,real(scheme))
519
520	END SUBROUTINE rocketduststorm
521
522	!=======================================================================
523	! **********************************************************************
524	! Subroutine to determine the vertical transport with
525	! a Van Leer advection scheme (copied from the sedimentation scheme --> see vlz_fi.F)
526	!***********************************************************************
527	SUBROUTINE van_leer(nlay,q,pente_max,masse,w,wq)
528
529	IMPLICIT NONE
530
531	!--------------------------------------------------------
532	! Input/Output Variables
533	!--------------------------------------------------------
534	INTEGER,INTENT(IN) :: nlay ! number of atmospheric layers
535	REAL,INTENT(IN) :: masse(nlay) ! mass of the layer Dp/g
536	REAL,INTENT(IN) :: pente_max != 2 conseillee
537	REAL,INTENT(INOUT) :: q(nlay) ! mixing ratio (kg/kg)
538	REAL,INTENT(INOUT) :: w(nlay) ! atmospheric mass "transferred" at each timestep (kg.m-2)
539	REAL,INTENT(INOUT) :: wq(nlay+1)
540
541	!--------------------------------------------------------
542	! Local Variables
543	!--------------------------------------------------------
544
545	INTEGER i,l,j,ii
546	REAL dzq(nlay),dzqw(nlay),adzqw(nlay),dzqmax
547	REAL newmasse
548	REAL sigw, Mtot, MQtot
549	INTEGER m
550
551	! **********************************************************************
552	! Mixing ratio vertical gradient at the levels
553	! **********************************************************************
554	do l=2,nlay
555	dzqw(l)=q(l-1)-q(l)
556	adzqw(l)=abs(dzqw(l))
557	enddo
558
559	do l=2,nlay-1
560	if(dzqw(l)*dzqw(l+1).gt.0.) then
561	dzq(l)=0.5*(dzqw(l)+dzqw(l+1))
562	else
563	dzq(l)=0.
564	endif
565	dzqmax=pente_max*min(adzqw(l),adzqw(l+1))
566	dzq(l)=sign(min(abs(dzq(l)),dzqmax),dzq(l))
567	enddo
568
569	dzq(1)=0.
570	dzq(nlay)=0.
571
572	! **********************************************************************
573	! Vertical advection
574	! **********************************************************************
575
576	!! No flux at the model top:
577	wq(nlay+1)=0.
578
579	!! Surface flux up:
580	if(w(1).lt.0.) wq(1)=0. ! warning : not always valid
581
582	do l = 1,nlay-1
583
584	! 1) Compute wq where w < 0 (up) (UPWARD TRANSPORT)
585	! ===============================
586
587	if(w(l+1).le.0)then
588	! Regular scheme (transfered mass < 1 layer)
589	! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
590	if(-w(l+1).le.masse(l))then
591	sigw=w(l+1)/masse(l)
592	wq(l+1)=w(l+1)(q(l)-0.5(1.+sigw)*dzq(l))
593	!!-------------------------------------------------------
594	! The following part should not be needed in the
595	! case of an integration over subtimesteps
596	!!-------------------------------------------------------
597	! Extended scheme (transfered mass > 1 layer)
598	! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
599	else
600	m = l-1
601	Mtot = masse(m+1)
602	MQtot = masse(m+1)*q(m+1)
603	if (m.le.0)goto 77
604	do while(-w(l+1).gt.(Mtot+masse(m)))
605	! do while(-w(l+1).gt.Mtot)
606	m=m-1
607	Mtot = Mtot + masse(m+1)
608	MQtot = MQtot + masse(m+1)*q(m+1)
609	if (m.le.0)goto 77
610	end do
611	77 continue
612
613	if (m.gt.0) then
614	sigw=(w(l+1)+Mtot)/masse(m)
615	wq(l+1)= -(MQtot + (-w(l+1)-Mtot)* &
616	(q(m)-0.5(1.+sigw)dzq(m)) )
617	else
618	w(l+1) = -Mtot
619	wq(l+1) = -MQtot
620	end if
621	endif ! (-w(l+1).le.masse(l))
622
623	! 2) Compute wq where w > 0 (down) (DOWNWARD TRANSPORT)
624	! ===============================
625
626	else if(w(l).gt.0.)then
627
628	! Regular scheme (transfered mass < 1 layer)
629	! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
630	if(w(l).le.masse(l))then
631	sigw=w(l)/masse(l)
632	wq(l)=w(l)(q(l)+0.5(1.-sigw)*dzq(l))
633	!!-------------------------------------------------------
634	! The following part should not be needed in the
635	! case of an integration over subtimesteps
636	!!-------------------------------------------------------
637	! Extended scheme (transfered mass > 1 layer)
638	! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
639	else
640	m=l
641	Mtot = masse(m)
642	MQtot = masse(m)*q(m)
643	if(m.ge.nlay)goto 88
644	do while(w(l).gt.(Mtot+masse(m+1)))
645	m=m+1
646	Mtot = Mtot + masse(m)
647	MQtot = MQtot + masse(m)*q(m)
648	if(m.ge.nlay)goto 88
649	end do
650	88 continue
651	if (m.lt.nlay) then
652	sigw=(w(l)-Mtot)/masse(m+1)
653	wq(l)=(MQtot + (w(l)-Mtot)* &
654	(q(m+1)+0.5(1.-sigw)dzq(m+1)) )
655	else
656	w(l) = Mtot
657	wq(l) = MQtot
658	end if
659	end if
660
661	end if ! w<0 (up)
662
663	enddo ! l = 1,nlay-1
664
665	do l = 1,nlay
666
667	! it cannot entrain more than available mass !
668	if ( (wq(l+1)-wq(l)) .lt. -(masse(l)*q(l)) ) then
669	wq(l+1) = wq(l)-masse(l)*q(l)
670	end if
671
672	q(l)=q(l) + (wq(l+1)-wq(l))/masse(l)
673
674	enddo
675
676	END SUBROUTINE van_leer
677
678	!=======================================================================
679	! Initialization of the module variables
680
681	subroutine ini_rocketduststorm_mod(ngrid)
682
683	implicit none
684
685	integer, intent(in) :: ngrid
686
687	allocate(dustliftday(ngrid))
688
689	end subroutine ini_rocketduststorm_mod
690
691	subroutine end_rocketduststorm_mod
692
693	implicit none
694
695	if (allocated(dustliftday)) deallocate(dustliftday)
696
697	end subroutine end_rocketduststorm_mod
698
699	END MODULE rocketduststorm_mod

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