1 | MODULE usrdef_sbc |
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2 | !!====================================================================== |
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3 | !! *** MODULE usrdef_sbc *** |
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4 | !! |
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5 | !! === BENCH configuration === |
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6 | !! |
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7 | !! User defined : surface forcing of a user configuration |
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8 | !!====================================================================== |
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9 | !! History : 4.0 ! |
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10 | !!---------------------------------------------------------------------- |
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11 | |
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12 | !!---------------------------------------------------------------------- |
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13 | !! usr_def_sbc : user defined surface bounday conditions in BENCH case |
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14 | !!---------------------------------------------------------------------- |
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15 | USE par_oce ! ocean space and time domain |
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16 | USE dom_oce |
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17 | USE oce ! ocean dynamics and tracers |
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18 | USE sbc_oce ! Surface boundary condition: ocean fields |
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19 | USE sbc_ice ! Surface boundary condition: ocean fields |
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20 | USE in_out_manager ! I/O manager |
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21 | USE phycst ! physical constants |
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22 | USE lib_mpp ! MPP library |
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23 | USE lbclnk ! lateral boundary conditions - mpp exchanges |
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24 | |
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25 | #if defined key_si3 |
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26 | USE ice, ONLY : at_i_b, a_i_b |
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27 | #endif |
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28 | |
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29 | IMPLICIT NONE |
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30 | PRIVATE |
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31 | |
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32 | PUBLIC usrdef_sbc_oce ! routine called in sbcmod module |
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33 | PUBLIC usrdef_sbc_ice_tau ! routine called by sbcice_lim.F90 for ice dynamics |
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34 | PUBLIC usrdef_sbc_ice_flx ! routine called by sbcice_lim.F90 for ice thermo |
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35 | |
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36 | !!---------------------------------------------------------------------- |
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37 | !! NEMO/OPA 4.0 , NEMO Consortium (2016) |
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38 | !! $Id$ |
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39 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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40 | !!---------------------------------------------------------------------- |
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41 | CONTAINS |
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42 | |
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43 | SUBROUTINE usrdef_sbc_oce( kt, Kbb ) |
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44 | !!--------------------------------------------------------------------- |
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45 | !! *** ROUTINE usr_def_sbc *** |
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46 | !! |
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47 | !! ** Purpose : provide at each time-step the surface boundary |
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48 | !! condition, i.e. the momentum, heat and freshwater fluxes. |
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49 | !! |
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50 | !! ** Method : all 0 fields, for BENCH case |
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51 | !! CAUTION : never mask the surface stress field ! |
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52 | !! |
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53 | !! ** Action : - set to ZERO all the ocean surface boundary condition, i.e. |
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54 | !! utau, vtau, taum, wndm, qns, qsr, emp, sfx |
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55 | !! |
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56 | !!---------------------------------------------------------------------- |
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57 | INTEGER, INTENT(in) :: kt ! ocean time step |
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58 | INTEGER, INTENT(in) :: Kbb ! ocean time index |
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59 | !!--------------------------------------------------------------------- |
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60 | ! |
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61 | IF( kt == nit000 ) THEN |
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62 | ! |
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63 | IF(lwp) WRITE(numout,*)' usr_sbc : BENCH case: surface forcing' |
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64 | IF(lwp) WRITE(numout,*)' ~~~~~~~~~~~ vtau = taum = wndm = qns = qsr = emp = sfx = 0' |
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65 | ! |
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66 | utau(:,:) = 0._wp |
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67 | vtau(:,:) = 0._wp |
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68 | taum(:,:) = 0._wp |
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69 | wndm(:,:) = 0._wp |
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70 | ! |
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71 | emp (:,:) = 0._wp |
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72 | sfx (:,:) = 0._wp |
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73 | qns (:,:) = 0._wp |
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74 | qsr (:,:) = 0._wp |
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75 | ! |
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76 | utau_b(:,:) = 0._wp |
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77 | vtau_b(:,:) = 0._wp |
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78 | emp_b (:,:) = 0._wp |
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79 | sfx_b (:,:) = 0._wp |
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80 | qns_b (:,:) = 0._wp |
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81 | ! |
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82 | ENDIF |
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83 | |
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84 | ! |
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85 | END SUBROUTINE usrdef_sbc_oce |
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86 | |
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87 | |
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88 | SUBROUTINE usrdef_sbc_ice_tau( kt ) |
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89 | !!--------------------------------------------------------------------- |
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90 | !! *** ROUTINE usrdef_sbc_ice_tau *** |
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91 | !! |
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92 | !! ** Purpose : provide the surface boundary (momentum) condition over |
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93 | !sea-ice |
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94 | !!--------------------------------------------------------------------- |
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95 | INTEGER, INTENT(in) :: kt ! ocean time step |
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96 | ! |
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97 | REAL(wp), DIMENSION(jpi,jpj) :: z2d ! 2D workspace |
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98 | INTEGER :: ji, jj |
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99 | !!--------------------------------------------------------------------- |
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100 | #if defined key_si3 |
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101 | IF( kt==nit000 .AND. lwp) WRITE(numout,*)' usrdef_sbc_ice : BENCH case: constant stress forcing' |
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102 | ! |
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103 | ! define unique value on each point. z2d ranging from 0.05 to -0.05 |
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104 | DO jj = 1, jpj |
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105 | DO ji = 1, jpi |
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106 | z2d(ji,jj) = 0.1 * ( 0.5 - REAL( nimpp + ji - 1 + ( njmpp + jj - 2 ) * jpiglo, wp ) / REAL( jpiglo * jpjglo, wp ) ) |
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107 | ENDDO |
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108 | ENDDO |
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109 | utau_ice(:,:) = 0.1_wp + z2d(:,:) |
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110 | vtau_ice(:,:) = 0.1_wp + z2d(:,:) |
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111 | |
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112 | CALL lbc_lnk_multi( 'usrdef_sbc', utau_ice, 'U', -1., vtau_ice, 'V', -1. ) |
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113 | #endif |
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114 | ! |
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115 | END SUBROUTINE usrdef_sbc_ice_tau |
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116 | |
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117 | |
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118 | SUBROUTINE usrdef_sbc_ice_flx( kt, phs, phi ) |
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119 | !!--------------------------------------------------------------------- |
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120 | !! *** ROUTINE usrdef_sbc_ice_flx *** |
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121 | !! |
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122 | !! ** Purpose : provide the surface boundary (flux) condition over |
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123 | !sea-ice |
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124 | !!--------------------------------------------------------------------- |
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125 | INTEGER, INTENT(in) :: kt ! ocean time step |
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126 | REAL(wp), DIMENSION(:,:,:), INTENT(in) :: phs ! snow thickness |
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127 | REAL(wp), DIMENSION(:,:,:), INTENT(in) :: phi ! ice thickness |
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128 | !! |
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129 | REAL(wp) :: zfr1, zfr2 ! local variables |
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130 | REAL(wp), DIMENSION(jpi,jpj) :: zsnw ! snw distribution after wind blowing |
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131 | !!--------------------------------------------------------------------- |
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132 | ! |
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133 | #if defined key_si3 |
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134 | IF( kt==nit000 .AND. lwp) WRITE(numout,*)' usrdef_sbc_ice : BENCH case: NO flux forcing' |
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135 | ! |
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136 | ! ocean variables (renaming) |
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137 | emp_oce (:,:) = 0._wp ! uniform value for freshwater budget (E-P) |
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138 | qsr_oce (:,:) = 0._wp ! uniform value for solar radiation |
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139 | qns_oce (:,:) = 0._wp ! uniform value for non-solar radiation |
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140 | |
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141 | ! ice variables |
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142 | alb_ice (:,:,:) = 0.7_wp ! useless |
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143 | qsr_ice (:,:,:) = 0._wp ! uniform value for solar radiation |
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144 | qns_ice (:,:,:) = 0._wp ! uniform value for non-solar radiation |
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145 | sprecip (:,:) = 0._wp ! uniform value for snow precip |
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146 | evap_ice(:,:,:) = 0._wp ! uniform value for sublimation |
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147 | |
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148 | ! ice fields deduced from above |
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149 | zsnw(:,:) = 1._wp |
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150 | !!CALL lim_thd_snwblow( at_i_b, zsnw ) ! snow distribution over ice after |
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151 | !wind blowing |
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152 | emp_ice (:,:) = SUM( a_i_b(:,:,:) * evap_ice(:,:,:), dim=3 ) - sprecip(:,:) * zsnw(:,:) |
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153 | emp_oce (:,:) = emp_oce(:,:) - sprecip(:,:) * (1._wp - zsnw(:,:) ) |
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154 | qevap_ice(:,:,:) = 0._wp |
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155 | qprec_ice(:,:) = rhos * ( sst_m(:,:) * rcpi - rLfus ) * tmask(:,:,1) ! in J/m3 |
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156 | qemp_oce (:,:) = - emp_oce(:,:) * sst_m(:,:) * rcp |
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157 | qemp_ice (:,:) = sprecip(:,:) * zsnw * ( sst_m(:,:) * rcpi - rLfus ) * tmask(:,:,1) ! solid precip (only) |
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158 | |
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159 | ! total fluxes |
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160 | emp_tot (:,:) = emp_ice + emp_oce |
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161 | qns_tot (:,:) = at_i_b(:,:) * qns_oce(:,:) + SUM( a_i_b(:,:,:) * qns_ice(:,:,:), dim=3 ) + qemp_ice(:,:) + qemp_oce(:,:) |
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162 | qsr_tot (:,:) = at_i_b(:,:) * qsr_oce(:,:) + SUM( a_i_b(:,:,:) * qsr_ice(:,:,:), dim=3 ) |
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163 | |
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164 | ! --- shortwave radiation transmitted below the surface (W/m2, see Grenfell Maykut 77) --- ! |
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165 | zfr1 = ( 0.18 * ( 1.0 - cldf_ice ) + 0.35 * cldf_ice ) ! transmission when hi>10cm |
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166 | zfr2 = ( 0.82 * ( 1.0 - cldf_ice ) + 0.65 * cldf_ice ) ! zfr2 such that zfr1 + zfr2 to equal 1 |
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167 | ! |
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168 | WHERE ( phs(:,:,:) <= 0._wp .AND. phi(:,:,:) < 0.1_wp ) ! linear decrease from hi=0 to 10cm |
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169 | qtr_ice_top(:,:,:) = qsr_ice(:,:,:) * ( zfr1 + zfr2 * ( 1._wp - phi(:,:,:) * 10._wp ) ) |
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170 | ELSEWHERE( phs(:,:,:) <= 0._wp .AND. phi(:,:,:) >= 0.1_wp ) ! constant (zfr1) when hi>10cm |
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171 | qtr_ice_top(:,:,:) = qsr_ice(:,:,:) * zfr1 |
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172 | ELSEWHERE ! zero when hs>0 |
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173 | qtr_ice_top(:,:,:) = 0._wp |
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174 | END WHERE |
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175 | #endif |
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176 | |
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177 | END SUBROUTINE usrdef_sbc_ice_flx |
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178 | |
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179 | !!====================================================================== |
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180 | END MODULE usrdef_sbc |
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