source: LMDZ6/branches/blowing_snow/libf/phylmd/climb_wind_mod.F90 @ 4947

Last change on this file since 4947 was 3102, checked in by oboucher, 7 years ago

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  • Property copyright set to
    Name of program: LMDZ
    Creation date: 1984
    Version: LMDZ5
    License: CeCILL version 2
    Holder: Laboratoire de m\'et\'eorologie dynamique, CNRS, UMR 8539
    See the license file in the root directory
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  • Property svn:keywords set to Author Date Id Revision
File size: 13.1 KB
Line 
1!
2MODULE climb_wind_mod
3!
4! Module to solve the verctical diffusion of the wind components "u" and "v".
5!
6  USE dimphy
7
8  IMPLICIT NONE
9
10  SAVE
11  PRIVATE
12 
13  REAL, DIMENSION(:),   ALLOCATABLE  :: alf1, alf2
14  !$OMP THREADPRIVATE(alf1,alf2)
15  REAL, DIMENSION(:,:), ALLOCATABLE  :: Kcoefm
16  !$OMP THREADPRIVATE(Kcoefm)
17  REAL, DIMENSION(:,:), ALLOCATABLE  :: Ccoef_U, Dcoef_U
18  !$OMP THREADPRIVATE(Ccoef_U, Dcoef_U)
19  REAL, DIMENSION(:,:), ALLOCATABLE  :: Ccoef_V, Dcoef_V
20  !$OMP THREADPRIVATE(Ccoef_V, Dcoef_V)
21  REAL, DIMENSION(:), ALLOCATABLE   :: Acoef_U, Bcoef_U
22  !$OMP THREADPRIVATE(Acoef_U, Bcoef_U)
23  REAL, DIMENSION(:), ALLOCATABLE   :: Acoef_V, Bcoef_V
24  !$OMP THREADPRIVATE(Acoef_V, Bcoef_V)
25  LOGICAL                            :: firstcall=.TRUE.
26  !$OMP THREADPRIVATE(firstcall)
27
28 
29  PUBLIC :: climb_wind_down, climb_wind_up
30
31CONTAINS
32!
33!****************************************************************************************
34!
35  SUBROUTINE climb_wind_init
36
37    INTEGER             :: ierr
38    CHARACTER(len = 20) :: modname = 'climb_wind_init'   
39
40!****************************************************************************************
41! Allocation of global module variables
42!
43!****************************************************************************************
44
45    ALLOCATE(alf1(klon), stat=ierr)
46    IF (ierr /= 0) CALL abort_physic(modname,'Pb in allocate alf1',1)
47
48    ALLOCATE(alf2(klon), stat=ierr)
49    IF (ierr /= 0) CALL abort_physic(modname,'Pb in allocate alf2',1)
50
51    ALLOCATE(Kcoefm(klon,klev), stat=ierr)
52    IF (ierr /= 0) CALL abort_physic(modname,'Pb in allocate Kcoefm',1)
53
54    ALLOCATE(Ccoef_U(klon,klev), stat=ierr)
55    IF (ierr /= 0) CALL abort_physic(modname,'Pb in allocate Ccoef_U',1)
56
57    ALLOCATE(Dcoef_U(klon,klev), stat=ierr)
58    IF (ierr /= 0) CALL abort_physic(modname,'Pb in allocation Dcoef_U',1)
59
60    ALLOCATE(Ccoef_V(klon,klev), stat=ierr)
61    IF (ierr /= 0) CALL abort_physic(modname,'Pb in allocation Ccoef_V',1)
62
63    ALLOCATE(Dcoef_V(klon,klev), stat=ierr)
64    IF (ierr /= 0) CALL abort_physic(modname,'Pb in allocation Dcoef_V',1)
65
66    ALLOCATE(Acoef_U(klon), Bcoef_U(klon), Acoef_V(klon), Bcoef_V(klon), STAT=ierr)
67    IF ( ierr /= 0 )  PRINT*,' pb in allloc Acoef_U and Bcoef_U, ierr=', ierr
68
69    firstcall=.FALSE.
70
71  END SUBROUTINE climb_wind_init
72!
73!****************************************************************************************
74!
75  SUBROUTINE climb_wind_down(knon, dtime, coef_in, pplay, paprs, temp, delp, u_old, v_old, &
76!!! nrlmd le 02/05/2011
77       Ccoef_U_out, Ccoef_V_out, Dcoef_U_out, Dcoef_V_out, &
78       Kcoef_m_out, alf_1_out, alf_2_out, &
79!!!
80       Acoef_U_out, Acoef_V_out, Bcoef_U_out, Bcoef_V_out)
81!
82! This routine calculates for the wind components u and v,
83! recursivly the coefficients C and D in equation
84! X(k) = C(k) + D(k)*X(k-1), X=[u,v], k=[1,klev] is the vertical layer.
85!
86!
87
88! Input arguments
89!****************************************************************************************
90    INTEGER, INTENT(IN)                      :: knon
91    REAL, INTENT(IN)                         :: dtime
92    REAL, DIMENSION(klon,klev), INTENT(IN)   :: coef_in
93    REAL, DIMENSION(klon,klev), INTENT(IN)   :: pplay ! pres au milieu de couche (Pa)
94    REAL, DIMENSION(klon,klev+1), INTENT(IN) :: paprs ! pression a inter-couche (Pa)
95    REAL, DIMENSION(klon,klev), INTENT(IN)   :: temp  ! temperature
96    REAL, DIMENSION(klon,klev), INTENT(IN)   :: delp
97    REAL, DIMENSION(klon,klev), INTENT(IN)   :: u_old
98    REAL, DIMENSION(klon,klev), INTENT(IN)   :: v_old
99
100! Output arguments
101!****************************************************************************************
102    REAL, DIMENSION(klon), INTENT(OUT)       :: Acoef_U_out
103    REAL, DIMENSION(klon), INTENT(OUT)       :: Acoef_V_out
104    REAL, DIMENSION(klon), INTENT(OUT)       :: Bcoef_U_out
105    REAL, DIMENSION(klon), INTENT(OUT)       :: Bcoef_V_out
106
107!!! nrlmd le 02/05/2011
108    REAL, DIMENSION(klon,klev), INTENT(OUT)  :: Ccoef_U_out
109    REAL, DIMENSION(klon,klev), INTENT(OUT)  :: Ccoef_V_out
110    REAL, DIMENSION(klon,klev), INTENT(OUT)  :: Dcoef_U_out
111    REAL, DIMENSION(klon,klev), INTENT(OUT)  :: Dcoef_V_out
112    REAL, DIMENSION(klon,klev), INTENT(OUT)  :: Kcoef_m_out
113    REAL, DIMENSION(klon), INTENT(OUT)       :: alf_1_out
114    REAL, DIMENSION(klon), INTENT(OUT)       :: alf_2_out
115!!!
116
117! Local variables
118!****************************************************************************************
119    REAL, DIMENSION(klon)                    :: u1lay, v1lay
120    INTEGER                                  :: k, i
121
122! Include
123!****************************************************************************************
124    INCLUDE "YOMCST.h"
125    INCLUDE "compbl.h"   
126
127!****************************************************************************************
128! Initialize module
129    IF (firstcall) CALL climb_wind_init
130
131!****************************************************************************************
132! Calculate the coefficients C and D in : u(k) = C(k) + D(k)*u(k-1)
133!
134!****************************************************************************************
135! - Define alpha (alf1 and alf2)
136    alf1(:) = 1.0
137    alf2(:) = 1.0 - alf1(:)
138
139! - Calculate the coefficients K
140    Kcoefm(:,:) = 0.0
141    DO k = 2, klev
142       DO i=1,knon
143          Kcoefm(i,k) = coef_in(i,k)*RG*RG*dtime/(pplay(i,k-1)-pplay(i,k)) &
144               *(paprs(i,k)*2/(temp(i,k)+temp(i,k-1))/RD)**2
145       END DO
146    END DO
147
148! - Calculate the coefficients C and D, component "u"
149    CALL calc_coef(knon, Kcoefm(:,:), delp(:,:), &
150         u_old(:,:), alf1(:), alf2(:),  &
151         Ccoef_U(:,:), Dcoef_U(:,:), Acoef_U(:), Bcoef_U(:))
152
153! - Calculate the coefficients C and D, component "v"
154    CALL calc_coef(knon, Kcoefm(:,:), delp(:,:), &
155         v_old(:,:), alf1(:), alf2(:),  &
156         Ccoef_V(:,:), Dcoef_V(:,:), Acoef_V(:), Bcoef_V(:))
157
158!****************************************************************************************
159! 6)
160! Return the first layer in output variables
161!
162!****************************************************************************************
163    Acoef_U_out = Acoef_U
164    Bcoef_U_out = Bcoef_U
165    Acoef_V_out = Acoef_V
166    Bcoef_V_out = Bcoef_V
167
168!****************************************************************************************
169! 7)
170! If Pbl is split, return also the other layers in output variables
171!
172!****************************************************************************************
173!!! jyg le 07/02/2012
174!!jyg       IF (mod(iflag_pbl_split,2) .eq.1) THEN
175       IF (mod(iflag_pbl_split,10) .ge.1) THEN
176!!! nrlmd le 02/05/2011
177    DO k= 1, klev
178      DO i= 1, klon
179        Ccoef_U_out(i,k) = Ccoef_U(i,k)
180        Ccoef_V_out(i,k) = Ccoef_V(i,k)
181        Dcoef_U_out(i,k) = Dcoef_U(i,k)
182        Dcoef_V_out(i,k) = Dcoef_V(i,k)
183        Kcoef_m_out(i,k) = Kcoefm(i,k)
184      ENDDO
185    ENDDO
186    DO i= 1, klon
187      alf_1_out(i)   = alf1(i)
188      alf_2_out(i)   = alf2(i)
189    ENDDO
190!!!     
191       ENDIF  ! (mod(iflag_pbl_split,2) .ge.1)
192!!!
193
194  END SUBROUTINE climb_wind_down
195!
196!****************************************************************************************
197!
198  SUBROUTINE calc_coef(knon, Kcoef, delp, X, alfa1, alfa2, Ccoef, Dcoef, Acoef, Bcoef)
199!
200! Find the coefficients C and D in fonction of alfa, K and delp
201!
202! Input arguments
203!****************************************************************************************
204    INTEGER, INTENT(IN)                      :: knon
205    REAL, DIMENSION(klon,klev), INTENT(IN)   :: Kcoef, delp
206    REAL, DIMENSION(klon,klev), INTENT(IN)   :: X
207    REAL, DIMENSION(klon), INTENT(IN)        :: alfa1, alfa2
208
209! Output arguments
210!****************************************************************************************
211    REAL, DIMENSION(klon), INTENT(OUT)       :: Acoef, Bcoef
212    REAL, DIMENSION(klon,klev), INTENT(OUT)  :: Ccoef, Dcoef
213 
214! local variables
215!****************************************************************************************
216    INTEGER                                  :: k, i
217    REAL                                     :: buf
218
219    INCLUDE "YOMCST.h"
220!****************************************************************************************
221!
222
223! Calculate coefficients C and D at top level, k=klev
224!
225    Ccoef(:,:) = 0.0
226    Dcoef(:,:) = 0.0
227
228    DO i = 1, knon
229       buf = delp(i,klev) + Kcoef(i,klev)
230
231       Ccoef(i,klev) = X(i,klev)*delp(i,klev)/buf
232       Dcoef(i,klev) = Kcoef(i,klev)/buf
233    END DO
234   
235!
236! Calculate coefficients C and D at top level (klev-1) <= k <= 2
237!
238    DO k=(klev-1),2,-1
239       DO i = 1, knon
240          buf = delp(i,k) + Kcoef(i,k) + Kcoef(i,k+1)*(1.-Dcoef(i,k+1))
241         
242          Ccoef(i,k) = (X(i,k)*delp(i,k) + Kcoef(i,k+1)*Ccoef(i,k+1))/buf
243          Dcoef(i,k) = Kcoef(i,k)/buf
244       END DO
245    END DO
246
247!
248! Calculate coeffiecent A and B at surface
249!
250    DO i = 1, knon
251       buf = delp(i,1) + Kcoef(i,2)*(1-Dcoef(i,2))
252       Acoef(i) = (X(i,1)*delp(i,1) + Kcoef(i,2)*Ccoef(i,2))/buf
253       Bcoef(i) = -RG/buf
254    END DO
255
256  END SUBROUTINE calc_coef
257!
258!****************************************************************************************
259!
260
261  SUBROUTINE climb_wind_up(knon, dtime, u_old, v_old, flx_u1, flx_v1,  &
262!!! nrlmd le 02/05/2011
263       Acoef_U_in, Acoef_V_in, Bcoef_U_in, Bcoef_V_in, &
264       Ccoef_U_in, Ccoef_V_in, Dcoef_U_in, Dcoef_V_in, &
265       Kcoef_m_in, &
266!!!
267       flx_u_new, flx_v_new, d_u_new, d_v_new)
268!
269! Diffuse the wind components from the surface layer and up to the top layer.
270! Coefficents A, B, C and D are known from before. Start values for the diffusion are the
271! momentum fluxes at surface.
272!
273! u(k=1) = A + B*flx*dtime
274! u(k)   = C(k) + D(k)*u(k-1)  [2 <= k <= klev]
275!
276!****************************************************************************************
277
278! Input arguments
279!****************************************************************************************
280    INTEGER, INTENT(IN)                     :: knon
281    REAL, INTENT(IN)                        :: dtime
282    REAL, DIMENSION(klon,klev), INTENT(IN)  :: u_old
283    REAL, DIMENSION(klon,klev), INTENT(IN)  :: v_old
284    REAL, DIMENSION(klon), INTENT(IN)       :: flx_u1, flx_v1 ! momentum flux
285
286!!! nrlmd le 02/05/2011
287    REAL, DIMENSION(klon), INTENT(IN)       :: Acoef_U_in,Acoef_V_in, Bcoef_U_in, Bcoef_V_in
288    REAL, DIMENSION(klon,klev), INTENT(IN)  :: Ccoef_U_in, Ccoef_V_in, Dcoef_U_in, Dcoef_V_in
289    REAL, DIMENSION(klon,klev), INTENT(IN)  :: Kcoef_m_in
290!!!
291
292! Output arguments
293!****************************************************************************************
294    REAL, DIMENSION(klon,klev), INTENT(OUT) :: flx_u_new, flx_v_new
295    REAL, DIMENSION(klon,klev), INTENT(OUT) :: d_u_new, d_v_new
296
297! Local variables
298!****************************************************************************************
299    REAL, DIMENSION(klon,klev)              :: u_new, v_new
300    INTEGER                                 :: k, i
301
302! Include
303!****************************************************************************************
304    INCLUDE "YOMCST.h"
305    INCLUDE "compbl.h"   
306   
307!
308!****************************************************************************************
309
310!!! jyg le 07/02/2012
311!!jyg       IF (mod(iflag_pbl_split,2) .eq.1) THEN
312       IF (mod(iflag_pbl_split,10) .ge.1) THEN
313!!! nrlmd le 02/05/2011
314    DO i = 1, knon
315      Acoef_U(i)=Acoef_U_in(i)
316      Acoef_V(i)=Acoef_V_in(i)
317      Bcoef_U(i)=Bcoef_U_in(i)
318      Bcoef_V(i)=Bcoef_V_in(i)
319    ENDDO
320    DO k = 1, klev
321      DO i = 1, knon
322        Ccoef_U(i,k)=Ccoef_U_in(i,k)
323        Ccoef_V(i,k)=Ccoef_V_in(i,k)
324        Dcoef_U(i,k)=Dcoef_U_in(i,k)
325        Dcoef_V(i,k)=Dcoef_V_in(i,k)
326        Kcoefm(i,k)=Kcoef_m_in(i,k)
327      ENDDO
328    ENDDO
329!!!
330       ENDIF  ! (mod(iflag_pbl_split,2) .ge.1)
331!!!
332
333! Niveau 1
334    DO i = 1, knon
335       u_new(i,1) = Acoef_U(i) + Bcoef_U(i)*flx_u1(i)*dtime
336       v_new(i,1) = Acoef_V(i) + Bcoef_V(i)*flx_v1(i)*dtime
337    END DO
338
339! Niveau 2 jusqu'au sommet klev
340    DO k = 2, klev
341       DO i=1, knon
342          u_new(i,k) = Ccoef_U(i,k) + Dcoef_U(i,k) * u_new(i,k-1)
343          v_new(i,k) = Ccoef_V(i,k) + Dcoef_V(i,k) * v_new(i,k-1)
344       END DO
345    END DO
346
347!****************************************************************************************
348! Calcul flux
349!
350!== flux_u/v est le flux de moment angulaire (positif vers bas)
351!== dont l'unite est: (kg m/s)/(m**2 s)
352!
353!****************************************************************************************
354!
355    flx_u_new(:,:) = 0.0
356    flx_v_new(:,:) = 0.0
357
358    flx_u_new(1:knon,1)=flx_u1(1:knon)
359    flx_v_new(1:knon,1)=flx_v1(1:knon)
360
361! Niveau 2->klev
362    DO k = 2, klev
363       DO i = 1, knon
364          flx_u_new(i,k) = Kcoefm(i,k)/RG/dtime * &
365               (u_new(i,k)-u_new(i,k-1))
366         
367          flx_v_new(i,k) = Kcoefm(i,k)/RG/dtime * &
368               (v_new(i,k)-v_new(i,k-1))
369       END DO
370    END DO
371
372!****************************************************************************************
373! Calcul tendances
374!
375!****************************************************************************************
376    d_u_new(:,:) = 0.0
377    d_v_new(:,:) = 0.0
378    DO k = 1, klev
379       DO i = 1, knon
380          d_u_new(i,k) = u_new(i,k) - u_old(i,k)
381          d_v_new(i,k) = v_new(i,k) - v_old(i,k)
382       END DO
383    END DO
384
385  END SUBROUTINE climb_wind_up
386!
387!****************************************************************************************
388!
389END MODULE climb_wind_mod
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