Directory: | ./ |
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File: | phys/change_srf_frac_mod.f90 |
Date: | 2022-01-11 19:19:34 |
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1 | ! | ||
2 | ! $Id: change_srf_frac_mod.F90 3780 2020-10-22 12:50:18Z evignon $ | ||
3 | ! | ||
4 | MODULE change_srf_frac_mod | ||
5 | |||
6 | IMPLICIT NONE | ||
7 | |||
8 | CONTAINS | ||
9 | ! | ||
10 | ! Change Surface Fractions | ||
11 | ! Author J Ghattas 2008 | ||
12 | |||
13 | 480 | SUBROUTINE change_srf_frac(itime, dtime, jour, & | |
14 | 480 | pctsrf, evap, z0m, z0h, agesno, & | |
15 | alb_dir, alb_dif, tsurf, ustar, u10m, v10m, pbl_tke) | ||
16 | |||
17 | |||
18 | |||
19 | ! | ||
20 | ! This subroutine is called from physiq.F at each timestep. | ||
21 | ! 1- For each type of ocean (force, slab, couple) receive new fractions only if | ||
22 | ! it's time to modify (is_modified=true). Otherwise nothing is done (is_modified=false). | ||
23 | ! If received new fraction : | ||
24 | ! 2- Tests and ajustements are done on the fractions | ||
25 | ! 3- Initialize variables where a new fraction(new or melted ice) has appered, | ||
26 | ! | ||
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 print_control_mod, ONLY: lunout | ||
36 | |||
37 | INCLUDE "YOMCST.h" | ||
38 | !albedo SB >>> | ||
39 | include "clesphys.h" | ||
40 | !albedo SB <<< | ||
41 | |||
42 | |||
43 | |||
44 | ! Input arguments | ||
45 | !**************************************************************************************** | ||
46 | INTEGER, INTENT(IN) :: itime ! current time step | ||
47 | INTEGER, INTENT(IN) :: jour ! day of the year | ||
48 | REAL, INTENT(IN) :: dtime ! length of time step (s) | ||
49 | |||
50 | ! In-Output arguments | ||
51 | !**************************************************************************************** | ||
52 | |||
53 | REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: pctsrf ! sub-surface fraction | ||
54 | REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: evap, agesno ! sub-surface fraction | ||
55 | REAL, DIMENSION(klon,nbsrf+1), INTENT(INOUT) :: z0m,z0h ! sub-surface fraction | ||
56 | !albedo SB >>> | ||
57 | REAL, DIMENSION(klon,nsw,nbsrf), INTENT(INOUT) :: alb_dir,alb_dif | ||
58 | !albedo SB <<< | ||
59 | |||
60 | REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: tsurf | ||
61 | REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: ustar | ||
62 | REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: u10m | ||
63 | REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: v10m | ||
64 | !jyg< | ||
65 | !! REAL, DIMENSION(klon,klev+1,nbsrf), INTENT(INOUT) :: pbl_tke | ||
66 | REAL, DIMENSION(klon,klev+1,nbsrf+1), INTENT(INOUT) :: pbl_tke | ||
67 | !>jyg | ||
68 | |||
69 | ! Loccal variables | ||
70 | !**************************************************************************************** | ||
71 | INTEGER :: i, nsrf | ||
72 | LOGICAL :: is_modified ! true if pctsrf is modified at this time step | ||
73 | LOGICAL :: test_sum=.FALSE. | ||
74 | LOGICAL, DIMENSION(klon,nbsrf) :: new_surf | ||
75 | 480 | REAL, DIMENSION(klon,nbsrf) :: pctsrf_old ! fraction from previous time-step | |
76 | REAL :: tmpsum | ||
77 | |||
78 |
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1910880 | pctsrf_old(:,:) = pctsrf(:,:) |
79 | !**************************************************************************************** | ||
80 | ! 1) | ||
81 | ! For each type of ocean (force, slab, couple) receive new fractions only if it's time | ||
82 | ! to modify (is_modified=true). Otherwise nothing is done (is_modified=false). | ||
83 | !**************************************************************************************** | ||
84 | 480 | SELECT CASE (type_ocean) | |
85 | CASE ('force') | ||
86 | ! Read fraction from limit.nc | ||
87 | 480 | CALL limit_read_frac(itime, dtime, jour, pctsrf, is_modified) | |
88 | CASE ('slab') | ||
89 | ✗ | IF (version_ocean == 'sicOBS'.OR. version_ocean == 'sicNO') THEN | |
90 | ! Read fraction from limit.nc | ||
91 | ✗ | CALL limit_read_frac(itime, dtime, jour, pctsrf, is_modified) | |
92 | ELSE | ||
93 | ! Get fraction from slab module | ||
94 | ✗ | CALL ocean_slab_frac(itime, dtime, jour, pctsrf, is_modified) | |
95 | ENDIF | ||
96 | CASE ('couple') | ||
97 | ! Get fraction from the coupler | ||
98 |
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480 | CALL cpl_receive_frac(itime, dtime, pctsrf, is_modified) |
99 | END SELECT | ||
100 | |||
101 | |||
102 | !**************************************************************************************** | ||
103 | ! 2) | ||
104 | ! Tests and ajustements on the new fractions : | ||
105 | ! - Put to zero fractions that are too small | ||
106 | ! - Test total fraction sum is one for each grid point | ||
107 | ! | ||
108 | !**************************************************************************************** | ||
109 |
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480 | IF (is_modified) THEN |
110 | |||
111 | ! Test and exit if a fraction is negative | ||
112 |
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39810 | IF (MINVAL(pctsrf(:,:)) < 0.) THEN |
113 | ✗ | WRITE(lunout,*)'Warning! One or several fractions are negative, itime=',itime | |
114 | ✗ | WRITE(lunout,*)'at point = ',MINLOC(pctsrf(:,:)) | |
115 | ✗ | WRITE(lunout,*)'value = ',MINVAL(pctsrf(:,:)) | |
116 | ✗ | CALL abort_physic('change_srf_frac','Negative fraction',1) | |
117 | END IF | ||
118 | |||
119 | ! Optional test on the incoming fraction | ||
120 |
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10 | IF (test_sum) THEN |
121 | ✗ | DO i= 1, klon | |
122 | ✗ | tmpsum = SUM(pctsrf(i,:)) | |
123 | ✗ | IF (ABS(1. - tmpsum) > 0.05) CALL abort_physic('change_srf_frac','Total fraction not equal 1.',1) | |
124 | END DO | ||
125 | END IF | ||
126 | |||
127 | ! Test for too small fractions of the sum land+landice and ocean+sea-ice | ||
128 |
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29830 | WHERE ((pctsrf(:,is_ter) + pctsrf(:,is_lic)) < 2*EPSFRA) |
129 | pctsrf(:,is_ter) = 0. | ||
130 | pctsrf(:,is_lic) = 0. | ||
131 | END WHERE | ||
132 | |||
133 |
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29830 | WHERE ((pctsrf(:,is_oce) + pctsrf(:,is_sic)) < 2*EPSFRA) |
134 | pctsrf(:,is_oce) = 0. | ||
135 | pctsrf(:,is_sic) = 0. | ||
136 | END WHERE | ||
137 | |||
138 | ! Normalize to force total fraction to be equal one | ||
139 |
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9950 | DO i= 1, klon |
140 |
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49700 | tmpsum = SUM(pctsrf(i,:)) |
141 |
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49710 | DO nsrf = 1, nbsrf |
142 | 49700 | pctsrf(i,nsrf) = pctsrf(i,nsrf) / tmpsum | |
143 | END DO | ||
144 | END DO | ||
145 | |||
146 | ! Test for too small fractions at each sub-surface | ||
147 |
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39770 | WHERE (pctsrf(:,is_ter) < EPSFRA) |
148 | pctsrf(:,is_lic) = pctsrf(:,is_ter) + pctsrf(:,is_lic) | ||
149 | pctsrf(:,is_ter) = 0. | ||
150 | END WHERE | ||
151 | |||
152 |
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39770 | WHERE (pctsrf(:,is_lic) < EPSFRA) |
153 | pctsrf(:,is_ter) = pctsrf(:,is_ter) + pctsrf(:,is_lic) | ||
154 | pctsrf(:,is_lic) = 0. | ||
155 | END WHERE | ||
156 | |||
157 |
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39770 | WHERE (pctsrf(:,is_oce) < EPSFRA) |
158 | pctsrf(:,is_sic) = pctsrf(:,is_oce) + pctsrf(:,is_sic) | ||
159 | pctsrf(:,is_oce) = 0. | ||
160 | END WHERE | ||
161 | |||
162 |
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39770 | WHERE (pctsrf(:,is_sic) < EPSFRA) |
163 | pctsrf(:,is_oce) = pctsrf(:,is_oce) + pctsrf(:,is_sic) | ||
164 | pctsrf(:,is_sic) = 0. | ||
165 | END WHERE | ||
166 | ! Send fractions back to slab ocean if needed | ||
167 |
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10 | IF (type_ocean == 'slab'.AND. version_ocean.NE.'sicINT') THEN |
168 | ✗ | WHERE (1.-zmasq(:)>EPSFRA) | |
169 | fsic(:)=pctsrf(:,is_sic)/(1.-zmasq(:)) | ||
170 | END WHERE | ||
171 | END IF | ||
172 | |||
173 | !**************************************************************************************** | ||
174 | ! 3) | ||
175 | ! Initialize variables where a new fraction has appered, | ||
176 | ! i.e. where new sea ice has been formed | ||
177 | ! or where ice free ocean has appread in a grid cell | ||
178 | ! | ||
179 | !**************************************************************************************** | ||
180 | |||
181 | CALL pbl_surface_newfrac(itime, pctsrf, pctsrf_old, & | ||
182 | evap, z0m, z0h, agesno, & | ||
183 | 10 | tsurf, alb_dir,alb_dif, ustar, u10m, v10m, pbl_tke) | |
184 | |||
185 | ELSE | ||
186 | ! No modifcation should be done | ||
187 |
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1871070 | pctsrf(:,:) = pctsrf_old(:,:) |
188 | |||
189 | END IF ! is_modified | ||
190 | |||
191 | 480 | END SUBROUTINE change_srf_frac | |
192 | |||
193 | |||
194 | END MODULE change_srf_frac_mod | ||
195 |