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alpale_th.F90 @ 4380

Last change on this file since 4380 was 2558, checked in by jyg, 8 years ago

Introduction of the Effective Lifting Power (ELP),
which takes into account the area (cv_feed_area)
covered by thermals contributing to each
cumulonimbus.

The use of ELP prevents singularities when the

trigger probability tends to zero. It is
activated by iflag_clos_bl = 3.

The ELP values are stored in the ALP_bl variable.

File size: 10.7 KB

Line
1	SUBROUTINE alpale_th ( dtime, lmax_th, t_seri, cell_area, &
2	cin, s2, n2, &
3	ale_bl_trig, ale_bl_stat, ale_bl, &
4	alp_bl, alp_bl_stat, &
5	proba_notrig, random_notrig)
6
7	! **************************************************************
8	! *
9	! ALPALE_TH *
10	! *
11	! *
12	! written by : Jean-Yves Grandpeix, 11/05/2016 *
13	! modified by : *
14	! **************************************************************
15
16	USE dimphy
17	USE ioipsl_getin_p_mod, ONLY : getin_p
18	USE print_control_mod, ONLY: mydebug=>debug , lunout, prt_level
19	!
20	IMPLICIT NONE
21
22	!================================================================
23	! Auteur(s) : Jean-Yves Grandpeix, 11/05/2016
24	! Objet : Contribution of the thermal scheme to Ale and Alp
25	!================================================================
26
27	! Input arguments
28	!----------------
29	REAL, INTENT(IN) :: dtime
30	REAL, DIMENSION(klon), INTENT(IN) :: cell_area
31	INTEGER, DIMENSION(klon), INTENT(IN) :: lmax_th
32	REAL, DIMENSION(klon,klev), INTENT(IN) :: t_seri
33	REAL, DIMENSION(klon), INTENT(IN) :: ale_bl_stat
34	REAL, DIMENSION(klon), INTENT(IN) :: cin
35	REAL, DIMENSION(klon), INTENT(IN) :: s2, n2
36
37	REAL, DIMENSION(klon), INTENT(INOUT) :: ale_bl_trig, ale_bl
38	REAL, DIMENSION(klon), INTENT(INOUT) :: alp_bl
39	REAL, DIMENSION(klon), INTENT(INOUT) :: alp_bl_stat
40
41	REAL, DIMENSION(klon), INTENT(OUT) :: proba_notrig, random_notrig
42
43	include "thermcell.h"
44
45	! Local variables
46	!----------------
47	INTEGER :: i
48	LOGICAL, SAVE :: first = .TRUE.
49	REAL, SAVE :: random_notrig_max=1.
50	REAL, SAVE :: cv_feed_area
51	REAL :: birth_number
52	REAL, DIMENSION(klon) :: ale_bl_ref
53	REAL, DIMENSION(klon) :: tau_trig
54	REAL, DIMENSION(klon) :: birth_rate
55	!
56	!$OMP THREADPRIVATE(random_notrig_max)
57	!$OMP THREADPRIVATE(cv_feed_area)
58	!$OMP THREADPRIVATE(first)
59	!
60	REAL umexp ! expression of (1.-exp(-x))/x valid for all x, especially when x->0
61	REAL x
62	umexp(x) = max(sign(1.,x-1.e-3),0.)*(1.-exp(-x))/max(x,1.e-3) + &
63	(1.-max(sign(1.,x-1.e-3),0.))(1.-0.5x(1.-x/3.(1.-0.25*x)))
64	!
65	!+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
66	! JYG, 20160513 : Introduction of the Effective Lifting Power (ELP), which
67	! takes into account the area (cv_feed_area) covered by thermals contributing
68	! to each cumulonimbus.
69	! The use of ELP prevents singularities when the trigger probability tends to
70	! zero. It is activated by iflag_clos_bl = 3.
71	! The ELP values are stored in the ALP_bl variable.
72	!
73	!+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
74	!
75	!---------------------------------------
76	IF (iflag_clos_bl .LT. 3) THEN
77	!---------------------------------------
78	!
79	! Original code (Nicolas Rochetin)
80	! --------------------------------
81
82	IF (first) THEN
83	random_notrig_max=1.
84	CALL getin_p('random_notrig_max',random_notrig_max)
85	first=.FALSE.
86	ENDIF
87	!cc nrlmd le 10/04/2012
88	!-----------Stochastic triggering-----------
89	if (iflag_trig_bl.ge.1) then
90	!
91	IF (prt_level .GE. 10) THEN
92	print *,'cin, ale_bl_stat, alp_bl_stat ', &
93	cin, ale_bl_stat, alp_bl_stat
94	ENDIF
95
96
97	!----Initialisations
98	do i=1,klon
99	proba_notrig(i)=1.
100	random_notrig(i)=1e6ale_bl_stat(i)-int(1e6ale_bl_stat(i))
101	if ( random_notrig(i) > random_notrig_max ) random_notrig(i)=0.
102	if ( ale_bl_trig(i) .lt. abs(cin(i))+1.e-10 ) then
103	tau_trig(i)=tau_trig_shallow
104	else
105	tau_trig(i)=tau_trig_deep
106	endif
107	enddo
108	!
109	IF (prt_level .GE. 10) THEN
110	print *,'random_notrig, tau_trig ', &
111	random_notrig, tau_trig
112	print *,'s_trig,s2,n2 ', &
113	s_trig,s2,n2
114	ENDIF
115
116	!Option pour re-activer l'ancien calcul de Ale_bl (iflag_trig_bl=2)
117	IF (iflag_trig_bl.eq.1) then
118
119	!----Tirage al\'eatoire et calcul de ale_bl_trig
120	do i=1,klon
121	if ( (ale_bl_stat(i) .gt. abs(cin(i))+1.e-10) ) then
122	proba_notrig(i)=(1.-exp(-s_trig/s2(i)))** &
123	(n2(i)*dtime/tau_trig(i))
124	! print *, 'proba_notrig(i) ',proba_notrig(i)
125	if (random_notrig(i) .ge. proba_notrig(i)) then
126	ale_bl_trig(i)=ale_bl_stat(i)
127	else
128	ale_bl_trig(i)=0.
129	endif
130	else
131	proba_notrig(i)=1.
132	random_notrig(i)=0.
133	ale_bl_trig(i)=0.
134	endif
135	enddo
136
137	ELSE IF (iflag_trig_bl.ge.2) then
138
139	do i=1,klon
140	if ( (Ale_bl(i) .gt. abs(cin(i))+1.e-10) ) then
141	proba_notrig(i)=(1.-exp(-s_trig/s2(i)))** &
142	(n2(i)*dtime/tau_trig(i))
143	! print *, 'proba_notrig(i) ',proba_notrig(i)
144	if (random_notrig(i) .ge. proba_notrig(i)) then
145	ale_bl_trig(i)=Ale_bl(i)
146	else
147	ale_bl_trig(i)=0.
148	endif
149	else
150	proba_notrig(i)=1.
151	random_notrig(i)=0.
152	ale_bl_trig(i)=0.
153	endif
154	enddo
155
156	ENDIF
157
158	!
159	IF (prt_level .GE. 10) THEN
160	print *,'proba_notrig, ale_bl_trig ', &
161	proba_notrig, ale_bl_trig
162	ENDIF
163
164	endif !(iflag_trig_bl)
165
166	!-----------Statistical closure-----------
167	if (iflag_clos_bl.eq.1) then
168
169	do i=1,klon
170	!CR: alp probabiliste
171	if (ale_bl_trig(i).gt.0.) then
172	alp_bl(i)=alp_bl(i)/(1.-min(proba_notrig(i),0.999))
173	endif
174	enddo
175
176	else if (iflag_clos_bl.eq.2) then
177
178	!CR: alp calculee dans thermcell_main
179	do i=1,klon
180	alp_bl(i)=alp_bl_stat(i)
181	enddo
182
183	else
184
185	alp_bl_stat(:)=0.
186
187	endif !(iflag_clos_bl)
188
189	!
190	!---------------------------------------
191	ELSEIF (iflag_clos_bl .EQ. 3) THEN ! (iflag_clos_bl .LT. 3)
192	!---------------------------------------
193	!
194	! New code with Effective Lifting Power
195	! -------------------------------------
196	IF (first) THEN
197	cv_feed_area = 1.e10 ! m2
198	CALL getin_p('cv_feed_area', cv_feed_area)
199	first=.FALSE.
200	ENDIF
201
202	!-----------Stochastic triggering-----------
203	if (iflag_trig_bl.ge.1) then
204	!
205	IF (prt_level .GE. 10) THEN
206	print *,'cin, ale_bl_stat, alp_bl_stat ', &
207	cin, ale_bl_stat, alp_bl_stat
208	ENDIF
209
210	! Use ale_bl_stat (Rochetin's code) or ale_bl (old code) according to
211	! iflag_trig_bl value.
212	IF (iflag_trig_bl.eq.1) then ! use ale_bl_stat (Rochetin computation)
213	do i=1,klon
214	ale_bl_ref(i)=ale_bl_stat(i)
215	enddo
216	ELSE IF (iflag_trig_bl.ge.2) then ! use ale_bl (old computation)
217	do i=1,klon
218	ale_bl_ref(i)=Ale_bl(i)
219	enddo
220	ENDIF ! (iflag_trig_bl.eq.1)
221
222
223	!----Initializations and random number generation
224	do i=1,klon
225	proba_notrig(i)=1.
226	random_notrig(i)=1e6ale_bl_stat(i)-int(1e6ale_bl_stat(i))
227	if ( ale_bl_trig(i) .lt. abs(cin(i))+1.e-10 ) then
228	tau_trig(i)=tau_trig_shallow
229	else
230	tau_trig(i)=tau_trig_deep
231	endif
232	enddo
233	!
234	IF (prt_level .GE. 10) THEN
235	print *,'random_notrig, tau_trig ', &
236	random_notrig, tau_trig
237	print *,'s_trig,s2,n2 ', &
238	s_trig,s2,n2
239	ENDIF
240
241	!----alp_bl computation
242	do i=1,klon
243	if ( (ale_bl_ref(i) .gt. abs(cin(i))+1.e-10) ) then
244	birth_number = n2(i)*exp(-s_trig/s2(i))
245	birth_rate(i) = birth_number/(tau_trig(i)*cell_area(i))
246	proba_notrig(i)=exp(-birth_number*dtime/tau_trig(i))
247	Alp_bl(i) = Alp_bl(i)* &
248	umexp(-birth_number*cv_feed_area/cell_area(i))/ &
249	umexp(-birth_numberdtime/tau_trig(i)) &
250	tau_trig(i)cv_feed_area/(dtimecell_area(i))
251	else
252	proba_notrig(i)=1.
253	random_notrig(i)=0.
254	alp_bl(i)=0.
255	endif
256	enddo
257
258	!----ale_bl_trig computation
259	do i=1,klon
260	if (random_notrig(i) .ge. proba_notrig(i)) then
261	ale_bl_trig(i)=ale_bl_ref(i)
262	else
263	ale_bl_trig(i)=0.
264	endif
265	enddo
266
267	!
268	IF (prt_level .GE. 10) THEN
269	print *,'proba_notrig, ale_bl_trig ', &
270	proba_notrig, ale_bl_trig
271	ENDIF
272
273	endif !(iflag_trig_bl .ge. 1)
274
275	!---------------------------------------
276	ENDIF ! (iflag_clos_bl .LT. 3)
277	!---------------------------------------
278
279	IF (prt_level .GE. 10) THEN
280	print *,'ale_bl_trig, alp_bl_stat ',ale_bl_trig, alp_bl_stat
281	ENDIF
282
283	!cc fin nrlmd le 10/04/2012
284	!
285	!IM/FH: 2011/02/23
286	! Couplage Thermiques/Emanuel seulement si T<0
287	if (iflag_coupl==2) then
288	IF (prt_level .GE. 10) THEN
289	print*,'Couplage Thermiques/Emanuel seulement si T<0'
290	ENDIF
291	do i=1,klon
292	if (t_seri(i,lmax_th(i))>273.) then
293	Ale_bl(i)=0.
294	endif
295	enddo
296	print *,'In order to run with iflag_coupl=2, you have to comment out the following stop'
297	STOP
298	endif
299	RETURN
300	END
301

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