1 | ! |
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2 | ! $Id: change_srf_frac_mod.F90 2669 2016-10-14 12:57:28Z fcheruy $ |
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3 | ! |
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4 | MODULE change_srf_frac_mod |
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5 | |
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6 | IMPLICIT NONE |
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7 | |
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8 | CONTAINS |
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9 | ! |
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10 | ! Change Surface Fractions |
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11 | ! Author J Ghattas 2008 |
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12 | |
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13 | SUBROUTINE change_srf_frac(itime, dtime, jour, & |
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14 | pctsrf, evap, z0m, z0h, agesno, & |
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15 | alb_dir, alb_dif, tsurf, ustar, u10m, v10m, pbl_tke) |
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16 | |
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17 | |
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18 | |
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19 | ! |
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20 | ! This subroutine is called from physiq.F at each timestep. |
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21 | ! 1- For each type of ocean (force, slab, couple) receive new fractions only if |
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22 | ! it's time to modify (is_modified=true). Otherwise nothing is done (is_modified=false). |
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23 | ! If received new fraction : |
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24 | ! 2- Tests and ajustements are done on the fractions |
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25 | ! 3- Initialize variables where a new fraction(new or melted ice) has appered, |
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26 | ! |
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27 | |
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28 | USE dimphy |
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29 | USE surface_data, ONLY : type_ocean,version_ocean |
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30 | USE limit_read_mod |
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31 | USE pbl_surface_mod, ONLY : pbl_surface_newfrac |
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32 | USE cpl_mod, ONLY : cpl_receive_frac |
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33 | USE ocean_slab_mod, ONLY : fsic, ocean_slab_frac |
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34 | USE indice_sol_mod |
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35 | USE print_control_mod, ONLY: lunout |
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36 | |
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37 | INCLUDE "YOMCST.h" |
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38 | !albedo SB >>> |
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39 | include "clesphys.h" |
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40 | !albedo SB <<< |
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41 | |
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42 | |
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43 | |
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44 | ! Input arguments |
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45 | !**************************************************************************************** |
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46 | INTEGER, INTENT(IN) :: itime ! current time step |
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47 | INTEGER, INTENT(IN) :: jour ! day of the year |
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48 | REAL, INTENT(IN) :: dtime ! length of time step (s) |
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49 | |
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50 | ! In-Output arguments |
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51 | !**************************************************************************************** |
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52 | |
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53 | REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: pctsrf ! sub-surface fraction |
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54 | REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: evap, agesno ! sub-surface fraction |
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55 | REAL, DIMENSION(klon,nbsrf+1), INTENT(INOUT) :: z0m,z0h ! sub-surface fraction |
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56 | !albedo SB >>> |
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57 | REAL, DIMENSION(klon,nsw,nbsrf), INTENT(INOUT) :: alb_dir,alb_dif |
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58 | !albedo SB <<< |
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59 | |
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60 | REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: tsurf |
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61 | REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: ustar |
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62 | REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: u10m |
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63 | REAL, DIMENSION(klon,nbsrf), INTENT(INOUT) :: v10m |
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64 | !jyg< |
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65 | !! REAL, DIMENSION(klon,klev+1,nbsrf), INTENT(INOUT) :: pbl_tke |
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66 | REAL, DIMENSION(klon,klev+1,nbsrf+1), INTENT(INOUT) :: pbl_tke |
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67 | !>jyg |
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68 | |
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69 | ! Loccal variables |
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70 | !**************************************************************************************** |
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71 | INTEGER :: i, nsrf |
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72 | LOGICAL :: is_modified ! true if pctsrf is modified at this time step |
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73 | LOGICAL :: test_sum=.FALSE. |
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74 | LOGICAL, DIMENSION(klon,nbsrf) :: new_surf |
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75 | REAL, DIMENSION(klon,nbsrf) :: pctsrf_old ! fraction from previous time-step |
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76 | REAL :: tmpsum |
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77 | |
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78 | pctsrf_old(:,:) = pctsrf(:,:) |
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79 | !**************************************************************************************** |
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80 | ! 1) |
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81 | ! For each type of ocean (force, slab, couple) receive new fractions only if it's time |
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82 | ! to modify (is_modified=true). Otherwise nothing is done (is_modified=false). |
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83 | !**************************************************************************************** |
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84 | SELECT CASE (type_ocean) |
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85 | CASE ('force') |
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86 | ! Read fraction from limit.nc |
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87 | CALL limit_read_frac(itime, dtime, jour, pctsrf, is_modified) |
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88 | CASE ('slab') |
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89 | IF (version_ocean == 'sicOBS'.OR. version_ocean == 'sicNO') THEN |
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90 | ! Read fraction from limit.nc |
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91 | CALL limit_read_frac(itime, dtime, jour, pctsrf, is_modified) |
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92 | ELSE |
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93 | ! Get fraction from slab module |
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94 | CALL ocean_slab_frac(itime, dtime, jour, pctsrf, is_modified) |
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95 | ENDIF |
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96 | CASE ('couple') |
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97 | ! Get fraction from the coupler |
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98 | CALL cpl_receive_frac(itime, dtime, pctsrf, is_modified) |
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99 | END SELECT |
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100 | |
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101 | |
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102 | !**************************************************************************************** |
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103 | ! 2) |
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104 | ! Tests and ajustements on the new fractions : |
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105 | ! - Put to zero fractions that are too small |
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106 | ! - Test total fraction sum is one for each grid point |
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107 | ! |
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108 | !**************************************************************************************** |
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109 | IF (is_modified) THEN |
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110 | |
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111 | ! Test and exit if a fraction is negative |
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112 | IF (MINVAL(pctsrf(:,:)) < 0.) THEN |
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113 | WRITE(lunout,*)'Warning! One or several fractions are negative, itime=',itime |
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114 | WRITE(lunout,*)'at point = ',MINLOC(pctsrf(:,:)) |
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115 | WRITE(lunout,*)'value = ',MINVAL(pctsrf(:,:)) |
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116 | CALL abort_physic('change_srf_frac','Negative fraction',1) |
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117 | END IF |
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118 | |
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119 | ! Optional test on the incoming fraction |
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120 | IF (test_sum) THEN |
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121 | DO i= 1, klon |
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122 | tmpsum = SUM(pctsrf(i,:)) |
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123 | IF (ABS(1. - tmpsum) > 0.05) CALL abort_physic('change_srf_frac','Total fraction not equal 1.',1) |
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124 | END DO |
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125 | END IF |
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126 | |
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127 | ! Test for too small fractions of the sum land+landice and ocean+sea-ice |
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128 | WHERE ((pctsrf(:,is_ter) + pctsrf(:,is_lic)) < 2*EPSFRA) |
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129 | pctsrf(:,is_ter) = 0. |
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130 | pctsrf(:,is_lic) = 0. |
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131 | END WHERE |
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132 | |
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133 | WHERE ((pctsrf(:,is_oce) + pctsrf(:,is_sic)) < 2*EPSFRA) |
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134 | pctsrf(:,is_oce) = 0. |
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135 | pctsrf(:,is_sic) = 0. |
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136 | END WHERE |
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137 | |
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138 | ! Normalize to force total fraction to be equal one |
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139 | DO i= 1, klon |
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140 | tmpsum = SUM(pctsrf(i,:)) |
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141 | DO nsrf = 1, nbsrf |
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142 | pctsrf(i,nsrf) = pctsrf(i,nsrf) / tmpsum |
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143 | END DO |
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144 | END DO |
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145 | |
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146 | ! Test for too small fractions at each sub-surface |
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147 | WHERE (pctsrf(:,is_ter) < EPSFRA) |
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148 | pctsrf(:,is_lic) = pctsrf(:,is_ter) + pctsrf(:,is_lic) |
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149 | pctsrf(:,is_ter) = 0. |
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150 | END WHERE |
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151 | |
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152 | WHERE (pctsrf(:,is_lic) < EPSFRA) |
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153 | pctsrf(:,is_ter) = pctsrf(:,is_ter) + pctsrf(:,is_lic) |
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154 | pctsrf(:,is_lic) = 0. |
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155 | END WHERE |
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156 | |
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157 | WHERE (pctsrf(:,is_oce) < EPSFRA) |
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158 | pctsrf(:,is_sic) = pctsrf(:,is_oce) + pctsrf(:,is_sic) |
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159 | pctsrf(:,is_oce) = 0. |
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160 | END WHERE |
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161 | |
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162 | WHERE (pctsrf(:,is_sic) < EPSFRA) |
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163 | pctsrf(:,is_oce) = pctsrf(:,is_oce) + pctsrf(:,is_sic) |
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164 | pctsrf(:,is_sic) = 0. |
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165 | END WHERE |
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166 | ! Send fractions back to slab ocean if needed |
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167 | IF (type_ocean == 'slab'.AND. version_ocean.NE.'sicINT') THEN |
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168 | WHERE (1.-zmasq(:)>EPSFRA) |
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169 | fsic(:)=pctsrf(:,is_sic)/(1.-zmasq(:)) |
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170 | END WHERE |
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171 | END IF |
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172 | |
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173 | !**************************************************************************************** |
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174 | ! 3) |
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175 | ! Initialize variables where a new fraction has appered, |
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176 | ! i.e. where new sea ice has been formed |
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177 | ! or where ice free ocean has appread in a grid cell |
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178 | ! |
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179 | !**************************************************************************************** |
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180 | |
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181 | CALL pbl_surface_newfrac(itime, pctsrf, pctsrf_old, & |
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182 | evap, z0m, z0h, agesno, & |
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183 | tsurf, alb_dir,alb_dif, ustar, u10m, v10m, pbl_tke) |
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184 | |
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185 | |
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186 | ELSE |
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187 | ! No modifcation should be done |
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188 | pctsrf(:,:) = pctsrf_old(:,:) |
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189 | |
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190 | END IF ! is_modified |
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191 | |
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192 | END SUBROUTINE change_srf_frac |
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193 | |
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194 | |
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195 | END MODULE change_srf_frac_mod |
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