source: LMDZ6/branches/Amaury_dev/libf/phylmdiso/change_srf_frac_mod.F90 @ 5367

Last change on this file since 5367 was 5144, checked in by abarral, 4 months ago

Put YOMCST.h into modules
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1
2! $Id: change_srf_frac_mod.F90 5144 2024-07-29 21:01:04Z abarral $
3
4MODULE change_srf_frac_mod
5USE lmdz_abort_physic, ONLY: abort_physic
6  IMPLICIT NONE
7
8CONTAINS
9
10! Change Surface Fractions
11! Author J Ghattas 2008
12
13  SUBROUTINE change_srf_frac(itime, dtime, jour, &
14        pctsrf, evap, z0m, z0h, agesno,              &
15        alb_dir, alb_dif, tsurf, ustar, u10m, v10m, pbl_tke &
16#ifdef ISO
17     ,xtevap  &
18#endif
19&       )
20
21! This SUBROUTINE is called from physiq.F at each timestep.
22! 1- For each type of ocean (force, slab, couple) receive new fractions only if
23!    it's time to modify (is_modified=true). Otherwise nothing is done (is_modified=false).   
24! If received new fraction :
25! 2- Tests and ajustements are done on the fractions
26! 3- Initialize variables where a new fraction(new or melted ice) has appered,
27
28    USE dimphy
29    USE surface_data, ONLY: type_ocean,version_ocean
30    USE limit_read_mod
31    USE pbl_surface_mod, ONLY: pbl_surface_newfrac
32    USE cpl_mod, ONLY: cpl_receive_frac
33    USE ocean_slab_mod, ONLY: fsic, ocean_slab_frac
34    USE indice_sol_mod
35    USE lmdz_print_control, ONLY: lunout
36#ifdef ISO
37  USE infotrac_phy, ONLY: ntiso   
38#endif
39  USE lmdz_clesphys ! albedo SB
40  USE lmdz_yomcst
41   
42
43  IMPLICIT NONE
44
45
46! Input arguments
47!****************************************************************************************
48    INTEGER, INTENT(IN)                     :: itime   ! current time step
49    INTEGER, INTENT(IN)                     :: jour    ! day of the year
50    REAL,    INTENT(IN)                     :: dtime   ! length of time step (s)
51 
52! In-Output arguments
53!****************************************************************************************
54   
55    REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: pctsrf ! sub-surface fraction
56    REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: evap, agesno ! sub-surface fraction
57
58    REAL, DIMENSION(klon,nbsrf+1), INTENT(INOUT) :: z0m,z0h ! sub-surface fraction
59!albedo SB >>>
60    REAL, DIMENSION(klon,nsw,nbsrf), INTENT(INOUT) :: alb_dir,alb_dif
61!albedo SB <<<
62#ifdef ISO
63    REAL, DIMENSION(ntiso,klon,nbsrf), INTENT(INOUT)        :: xtevap
64#endif
65
66    REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: tsurf
67    REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: ustar
68    REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: u10m
69    REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: v10m
70!jyg<
71!!    REAL, DIMENSION(klon,klev+1,nbsrf), INTENT(INOUT) :: pbl_tke
72    REAL, DIMENSION(klon,klev+1,nbsrf+1), INTENT(INOUT) :: pbl_tke
73!>jyg
74
75! Loccal variables
76!****************************************************************************************
77    INTEGER                        :: i, nsrf
78    LOGICAL                        :: is_modified   ! true if pctsrf is modified at this time step
79    LOGICAL                        :: test_sum=.FALSE.
80    LOGICAL, DIMENSION(klon,nbsrf) :: new_surf
81    REAL, DIMENSION(klon,nbsrf)    :: pctsrf_old    ! fraction from previous time-step
82    REAL                           :: tmpsum
83
84    pctsrf_old(:,:) = pctsrf(:,:)
85!****************************************************************************************
86! 1)
87! For each type of ocean (force, slab, couple) receive new fractions only if it's time 
88! to modify (is_modified=true). Otherwise nothing is done (is_modified=false).   
89!****************************************************************************************
90    SELECT CASE (type_ocean)
91    CASE ('force')
92       ! Read fraction from limit.nc
93       CALL limit_read_frac(itime, dtime, jour, pctsrf, is_modified)
94    CASE ('slab')
95       ! Get fraction from slab module
96       CALL ocean_slab_frac(itime, dtime, jour, pctsrf, is_modified)
97    CASE ('couple')
98       ! Get fraction from the coupler
99       CALL cpl_receive_frac(itime, dtime, pctsrf, is_modified)
100    END SELECT
101
102
103!****************************************************************************************
104! 2)
105! Tests and ajustements on the new fractions :
106! - Put to zero fractions that are too small
107! - Test total fraction sum is one for each grid point
108
109!****************************************************************************************
110    IF (is_modified) THEN
111 
112! Test and exit if a fraction is negative
113       IF (MINVAL(pctsrf(:,:)) < 0.) THEN
114          WRITE(lunout,*)'Warning! One or several fractions are negative, itime=',itime
115          WRITE(lunout,*)'at point = ',MINLOC(pctsrf(:,:))
116          WRITE(lunout,*)'value = ',MINVAL(pctsrf(:,:))
117          CALL abort_physic('change_srf_frac','Negative fraction',1)
118       END IF
119
120! Optional test on the incoming fraction
121       IF (test_sum) THEN
122          DO i= 1, klon
123             tmpsum = SUM(pctsrf(i,:))
124             IF (ABS(1. - tmpsum) > 0.05) CALL abort_physic('change_srf_frac','Total fraction not equal 1.',1)
125          END DO
126       END IF
127
128! Test for too small fractions of the sum land+landice and ocean+sea-ice
129       WHERE ((pctsrf(:,is_ter) + pctsrf(:,is_lic)) < 2*EPSFRA)
130          pctsrf(:,is_ter) = 0.
131          pctsrf(:,is_lic) = 0.
132       END WHERE
133
134       WHERE ((pctsrf(:,is_oce) + pctsrf(:,is_sic)) < 2*EPSFRA)
135          pctsrf(:,is_oce) = 0.
136          pctsrf(:,is_sic) = 0.
137       END WHERE
138
139! Normalize to force total fraction to be equal one
140       DO i= 1, klon
141          tmpsum = SUM(pctsrf(i,:))
142          DO nsrf = 1, nbsrf
143             pctsrf(i,nsrf) = pctsrf(i,nsrf) / tmpsum
144          END DO
145       END DO
146
147! Test for too small fractions at each sub-surface
148       WHERE (pctsrf(:,is_ter) < EPSFRA)
149          pctsrf(:,is_lic) = pctsrf(:,is_ter) + pctsrf(:,is_lic)
150          pctsrf(:,is_ter) = 0.
151       END WHERE
152
153       WHERE (pctsrf(:,is_lic) < EPSFRA)
154          pctsrf(:,is_ter) = pctsrf(:,is_ter) + pctsrf(:,is_lic)
155          pctsrf(:,is_lic) = 0.
156       END WHERE
157
158       WHERE (pctsrf(:,is_oce) < EPSFRA)
159          pctsrf(:,is_sic) = pctsrf(:,is_oce) + pctsrf(:,is_sic)
160          pctsrf(:,is_oce) = 0.
161       END WHERE
162
163       WHERE (pctsrf(:,is_sic) < EPSFRA)
164          pctsrf(:,is_oce) = pctsrf(:,is_oce) + pctsrf(:,is_sic)
165          pctsrf(:,is_sic) = 0.
166       END WHERE
167! Send fractions back to slab ocean if needed
168       IF (type_ocean == 'slab'.AND. version_ocean/='sicINT') THEN
169           WHERE (1.-zmasq(:)>EPSFRA)
170               fsic(:)=pctsrf(:,is_sic)/(1.-zmasq(:))
171           END WHERE
172       END IF
173
174!****************************************************************************************
175! 3)
176! Initialize variables where a new fraction has appered,
177! i.e. where new sea ice has been formed
178! or where ice free ocean has appread in a grid cell
179
180!****************************************************************************************
181
182       CALL pbl_surface_newfrac(itime, pctsrf, pctsrf_old,        &
183           evap, z0m, z0h, agesno,                                &
184           tsurf, alb_dir,alb_dif, ustar, u10m, v10m, pbl_tke &
185#ifdef ISO
186     ,xtevap  &
187#endif
188&       )
189
190
191    ELSE
192       ! No modifcation should be done
193       pctsrf(:,:) = pctsrf_old(:,:)
194
195    END IF ! is_modified
196
197  END SUBROUTINE change_srf_frac
198
199
200END MODULE change_srf_frac_mod
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