1 | MODULE limsbc |
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2 | !!====================================================================== |
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3 | !! *** MODULE limsbc *** |
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4 | !! computation of the flux at the sea ice/ocean interface |
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5 | !!====================================================================== |
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6 | !! History : - ! 2006-07 (M. Vancoppelle) LIM3 original code |
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7 | !! 3.0 ! 2008-03 (C. Tallandier) surface module |
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8 | !! - ! 2008-04 (C. Tallandier) split in 2 + new ice-ocean coupling |
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9 | !! 3.3 ! 2010-05 (G. Madec) decrease ocean & ice reference salinities in the Baltic sea |
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10 | !! ! + simplification of the ice-ocean stress calculation |
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11 | !! 3.4 ! 2011-02 (G. Madec) dynamical allocation |
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12 | !! - ! 2012 (D. Iovino) salt flux change |
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13 | !! - ! 2012-05 (C. Rousset) add penetration solar flux |
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14 | !! 3.5 ! 2012-10 (A. Coward, G. Madec) salt fluxes ; ice+snow mass |
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15 | !!---------------------------------------------------------------------- |
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16 | #if defined key_lim3 |
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17 | !!---------------------------------------------------------------------- |
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18 | !! 'key_lim3' LIM 3.0 sea-ice model |
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19 | !!---------------------------------------------------------------------- |
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20 | !! lim_sbc_alloc : allocate the limsbc arrays |
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21 | !! lim_sbc_init : initialisation |
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22 | !! lim_sbc_flx : updates mass, heat and salt fluxes at the ocean surface |
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23 | !! lim_sbc_tau : update i- and j-stresses, and its modulus at the ocean surface |
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24 | !!---------------------------------------------------------------------- |
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25 | USE par_oce ! ocean parameters |
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26 | USE phycst ! physical constants |
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27 | USE par_ice ! ice parameters |
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28 | USE dom_oce ! ocean domain |
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29 | USE dom_ice, ONLY : tms, area |
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30 | USE ice ! LIM sea-ice variables |
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31 | USE sbc_ice ! Surface boundary condition: sea-ice fields |
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32 | USE sbc_oce ! Surface boundary condition: ocean fields |
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33 | USE sbccpl |
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34 | USE cpl_oasis3, ONLY : lk_cpl |
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35 | USE oce , ONLY : iatte, oatte, sshn, sshb, snwice_mass, snwice_mass_b, snwice_fmass, sshu_b, sshv_b, sshu_n, sshv_n, sshf_n |
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36 | USE albedo ! albedo parameters |
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37 | USE lbclnk ! ocean lateral boundary condition - MPP exchanges |
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38 | USE lib_mpp ! MPP library |
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39 | USE wrk_nemo ! work arrays |
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40 | USE in_out_manager ! I/O manager |
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41 | USE prtctl ! Print control |
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42 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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43 | USE traqsr ! clem: add penetration of solar flux into the calculation of heat budget |
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44 | |
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45 | IMPLICIT NONE |
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46 | PRIVATE |
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47 | |
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48 | PUBLIC lim_sbc_init ! called by ice_init |
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49 | PUBLIC lim_sbc_flx ! called by sbc_ice_lim |
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50 | PUBLIC lim_sbc_tau ! called by sbc_ice_lim |
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51 | |
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52 | REAL(wp) :: epsi10 = 1.e-10 ! |
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53 | REAL(wp) :: epsi20 = 1.e-20 ! |
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54 | |
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55 | REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: utau_oce, vtau_oce ! air-ocean surface i- & j-stress [N/m2] |
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56 | REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: tmod_io ! modulus of the ice-ocean velocity [m/s] |
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57 | REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: soce_0 , sice_0 ! cst SSS and ice salinity (levitating sea-ice) |
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58 | |
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59 | !! * Substitutions |
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60 | # include "vectopt_loop_substitute.h90" |
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61 | !!---------------------------------------------------------------------- |
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62 | !! NEMO/LIM3 4.0 , UCL - NEMO Consortium (2011) |
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63 | !! $Id$ |
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64 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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65 | !!---------------------------------------------------------------------- |
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66 | CONTAINS |
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67 | |
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68 | INTEGER FUNCTION lim_sbc_alloc() |
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69 | !!------------------------------------------------------------------- |
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70 | !! *** ROUTINE lim_sbc_alloc *** |
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71 | !!------------------------------------------------------------------- |
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72 | ALLOCATE( soce_0(jpi,jpj) , utau_oce(jpi,jpj) , & |
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73 | & sice_0(jpi,jpj) , vtau_oce(jpi,jpj) , tmod_io(jpi,jpj), STAT=lim_sbc_alloc) |
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74 | ! |
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75 | IF( lk_mpp ) CALL mpp_sum( lim_sbc_alloc ) |
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76 | IF( lim_sbc_alloc /= 0 ) CALL ctl_warn('lim_sbc_alloc: failed to allocate arrays') |
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77 | END FUNCTION lim_sbc_alloc |
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78 | |
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79 | |
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80 | SUBROUTINE lim_sbc_flx( kt ) |
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81 | !!------------------------------------------------------------------- |
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82 | !! *** ROUTINE lim_sbc_flx *** |
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83 | !! |
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84 | !! ** Purpose : Update the surface ocean boundary condition for heat |
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85 | !! salt and mass over areas where sea-ice is non-zero |
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86 | !! |
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87 | !! ** Action : - computes the heat and freshwater/salt fluxes |
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88 | !! at the ice-ocean interface. |
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89 | !! - Update the ocean sbc |
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90 | !! |
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91 | !! ** Outputs : - qsr : sea heat flux: solar |
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92 | !! - qns : sea heat flux: non solar |
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93 | !! - emp : freshwater budget: volume flux |
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94 | !! - sfx : salt flux |
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95 | !! - fr_i : ice fraction |
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96 | !! - tn_ice : sea-ice surface temperature |
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97 | !! - alb_ice : sea-ice alberdo (lk_cpl=T) |
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98 | !! |
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99 | !! References : Goosse, H. et al. 1996, Bul. Soc. Roy. Sc. Liege, 65, 87-90. |
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100 | !! Tartinville et al. 2001 Ocean Modelling, 3, 95-108. |
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101 | !!--------------------------------------------------------------------- |
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102 | INTEGER, INTENT(in) :: kt ! number of iteration |
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103 | ! |
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104 | INTEGER :: ji, jj, jl, jk ! dummy loop indices |
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105 | REAL(wp) :: zinda, zemp ! local scalars |
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106 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zalb, zalbp ! 2D/3D workspace |
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107 | REAL(wp) :: ztmelts ! clem 2014: for HC diags |
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108 | |
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109 | REAL(wp) :: zf_mass ! Heat flux associated with mass exchange ice->ocean (W.m-2) |
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110 | REAL(wp) :: zfcm1 ! New solar flux received by the ocean |
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111 | !!--------------------------------------------------------------------- |
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112 | |
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113 | IF( lk_cpl ) CALL wrk_alloc( jpi, jpj, jpl, zalb, zalbp ) |
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114 | |
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115 | ! pfrld is the lead fraction at the previous time step (actually between TRP and THD) |
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116 | DO jj = 1, jpj |
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117 | DO ji = 1, jpi |
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118 | |
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119 | !------------------------------------------! |
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120 | ! heat flux at the ocean surface ! |
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121 | !------------------------------------------! |
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122 | zinda = 1._wp - MAX( 0._wp , SIGN( 1._wp , - ( 1._wp - pfrld(ji,jj) ) ) ) ! 1 if ice |
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123 | |
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124 | ! Solar heat flux reaching the ocean = zfcm1 (W.m-2) |
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125 | !--------------------------------------------------- |
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126 | IF( lk_cpl ) THEN ! be carfeful: not been tested yet |
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127 | ! original line |
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128 | zfcm1 = qsr_tot(ji,jj) |
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129 | !!!zfcm1 = qsr_tot(ji,jj) + ftr_ice(ji,jj) * ( 1._wp - pfrld(ji,jj) ) / ( 1._wp - zinda + zinda * iatte(ji,jj) ) |
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130 | DO jl = 1, jpl |
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131 | zfcm1 = zfcm1 - ( qsr_ice(ji,jj,jl) - ftr_ice(ji,jj,jl) ) * old_a_i(ji,jj,jl) |
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132 | END DO |
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133 | ELSE |
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134 | !!!zfcm1 = pfrld(ji,jj) * qsr(ji,jj) + & |
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135 | !!! & ( 1._wp - pfrld(ji,jj) ) * ftr_ice(ji,jj) / ( 1._wp - zinda + zinda * iatte(ji,jj) ) |
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136 | zfcm1 = pfrld(ji,jj) * qsr(ji,jj) |
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137 | DO jl = 1, jpl |
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138 | zfcm1 = zfcm1 + old_a_i(ji,jj,jl) * ftr_ice(ji,jj,jl) |
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139 | END DO |
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140 | ENDIF |
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141 | |
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142 | ! Total heat flux reaching the ocean = hfx_out (W.m-2) |
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143 | !--------------------------------------------------- |
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144 | zf_mass = hfx_thd(ji,jj) + hfx_dyn(ji,jj) + hfx_res(ji,jj) ! heat flux from snow is 0 (T=0 degC) |
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145 | hfx_out(ji,jj) = hfx_out(ji,jj) + zf_mass + zfcm1 |
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146 | |
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147 | ! New qsr and qns used to compute the oceanic heat flux at the next time step |
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148 | !--------------------------------------------------- |
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149 | qsr(ji,jj) = zfcm1 |
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150 | qns(ji,jj) = hfx_out(ji,jj) - zfcm1 |
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151 | |
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152 | !------------------------------------------! |
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153 | ! mass flux at the ocean surface ! |
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154 | !------------------------------------------! |
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155 | ! case of realistic freshwater flux (Tartinville et al., 2001) (presently ACTIVATED) |
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156 | ! ------------------------------------------------------------------------------------- |
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157 | ! The idea of this approach is that the system that we consider is the ICE-OCEAN system |
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158 | ! Thus FW flux = External ( E-P+snow melt) |
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159 | ! Salt flux = Exchanges in the ice-ocean system then converted into FW |
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160 | ! Associated to Ice formation AND Ice melting |
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161 | ! Even if i see Ice melting as a FW and SALT flux |
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162 | ! |
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163 | ! computing freshwater exchanges at the ice/ocean interface |
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164 | ! clem 2014/04: why not 1-pfrld instead of at_i here??? |
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165 | IF( lk_cpl ) THEN |
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166 | zemp = - emp_tot(ji,jj) + emp_ice(ji,jj) * ( 1. - pfrld(ji,jj) ) & ! |
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167 | & - wfx_snw(ji,jj) |
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168 | ELSE |
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169 | zemp = emp(ji,jj) * pfrld(ji,jj) & ! evaporation over oceanic fraction |
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170 | & - tprecip(ji,jj) * ( 1._wp - pfrld(ji,jj) ) & ! all precipitation reach the ocean |
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171 | & + sprecip(ji,jj) * ( 1._wp - pfrld(ji,jj)**betas ) ! except solid precip intercepted by sea-ice |
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172 | ENDIF |
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173 | |
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174 | ! mass flux from ice/ocean |
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175 | wfx_ice(ji,jj) = wfx_bog(ji,jj) + wfx_bom(ji,jj) + wfx_sum(ji,jj) + wfx_sni(ji,jj) + wfx_opw(ji,jj) + wfx_dyn(ji,jj) + wfx_res(ji,jj) |
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176 | |
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177 | ! mass flux at the ocean/ice interface |
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178 | fmmflx(ji,jj) = wfx_ice(ji,jj) * rdt_ice ! F/M mass flux save at least for biogeochemical model |
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179 | emp(ji,jj) = zemp + wfx_ice(ji,jj) + wfx_snw(ji,jj) ! mass flux + F/M mass flux (always ice/ocean mass exchange) |
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180 | |
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181 | END DO |
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182 | END DO |
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183 | |
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184 | !------------------------------------------! |
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185 | ! salt flux at the ocean surface ! |
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186 | !------------------------------------------! |
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187 | sfx(:,:) = sfx_bog(:,:) + sfx_bom(:,:) + sfx_sum(:,:) + sfx_sni(:,:) + sfx_opw(:,:) + sfx_res(:,:) + sfx_dyn(:,:) + sfx_bri(:,:) |
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188 | |
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189 | !-------------------------------------------------------------! |
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190 | ! mass of snow and ice per unit area for embedded sea-ice ! |
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191 | !-------------------------------------------------------------! |
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192 | IF( nn_ice_embd /= 0 ) THEN |
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193 | ! save mass from the previous ice time step |
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194 | snwice_mass_b(:,:) = snwice_mass(:,:) |
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195 | ! new mass per unit area |
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196 | snwice_mass (:,:) = tms(:,:) * ( rhosn * vt_s(:,:) + rhoic * vt_i(:,:) ) |
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197 | ! time evolution of snow+ice mass |
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198 | snwice_fmass (:,:) = ( snwice_mass(:,:) - snwice_mass_b(:,:) ) * r1_rdtice |
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199 | ENDIF |
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200 | |
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201 | !-----------------------------------------------! |
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202 | ! Storing the transmitted variables ! |
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203 | !-----------------------------------------------! |
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204 | fr_i (:,:) = at_i(:,:) ! Sea-ice fraction |
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205 | tn_ice(:,:,:) = t_su(:,:,:) ! Ice surface temperature |
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206 | |
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207 | !------------------------------------------------! |
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208 | ! Computation of snow/ice and ocean albedo ! |
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209 | !------------------------------------------------! |
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210 | IF( lk_cpl ) THEN ! coupled case |
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211 | CALL albedo_ice( t_su, ht_i, ht_s, zalbp, zalb ) ! snow/ice albedo |
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212 | alb_ice(:,:,:) = 0.5_wp * zalbp(:,:,:) + 0.5_wp * zalb (:,:,:) ! Ice albedo (mean clear and overcast skys) |
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213 | ENDIF |
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214 | |
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215 | ! ------------------------------------------------- |
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216 | ! C. Rousset Begin Diagnostics for heat in W/m2 |
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217 | ! ------------------------------------------------- |
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218 | DO jj = 1, jpj |
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219 | DO ji = 1, jpi |
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220 | diag_heat_dhc1(ji,jj) = ( SUM( d_e_i_trp(ji,jj,1:nlay_i,:) + d_e_i_thd(ji,jj,1:nlay_i,:) ) + & |
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221 | & SUM( d_e_s_trp(ji,jj,1:nlay_s,:) + d_e_s_thd(ji,jj,1:nlay_s,:) ) ) * unit_fac * r1_rdtice / area(ji,jj) |
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222 | END DO |
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223 | END DO |
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224 | ! ------------------------------------------------- |
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225 | ! C. Rousset End Diagnostics |
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226 | ! ------------------------------------------------- |
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227 | |
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228 | IF(ln_ctl) THEN |
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229 | CALL prt_ctl( tab2d_1=qsr , clinfo1=' lim_sbc: qsr : ', tab2d_2=qns , clinfo2=' qns : ' ) |
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230 | CALL prt_ctl( tab2d_1=emp , clinfo1=' lim_sbc: emp : ', tab2d_2=sfx , clinfo2=' sfx : ' ) |
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231 | CALL prt_ctl( tab2d_1=fr_i , clinfo1=' lim_sbc: fr_i : ' ) |
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232 | CALL prt_ctl( tab3d_1=tn_ice, clinfo1=' lim_sbc: tn_ice : ', kdim=jpl ) |
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233 | ENDIF |
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234 | ! |
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235 | IF( lk_cpl ) CALL wrk_dealloc( jpi, jpj, jpl, zalb, zalbp ) |
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236 | ! |
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237 | END SUBROUTINE lim_sbc_flx |
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238 | |
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239 | |
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240 | SUBROUTINE lim_sbc_tau( kt , pu_oce, pv_oce ) |
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241 | !!------------------------------------------------------------------- |
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242 | !! *** ROUTINE lim_sbc_tau *** |
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243 | !! |
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244 | !! ** Purpose : Update the ocean surface stresses due to the ice |
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245 | !! |
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246 | !! ** Action : * at each ice time step (every nn_fsbc time step): |
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247 | !! - compute the modulus of ice-ocean relative velocity |
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248 | !! (*rho*Cd) at T-point (C-grid) or I-point (B-grid) |
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249 | !! tmod_io = rhoco * | U_ice-U_oce | |
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250 | !! - update the modulus of stress at ocean surface |
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251 | !! taum = frld * taum + (1-frld) * tmod_io * | U_ice-U_oce | |
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252 | !! * at each ocean time step (every kt): |
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253 | !! compute linearized ice-ocean stresses as |
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254 | !! Utau = tmod_io * | U_ice - pU_oce | |
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255 | !! using instantaneous current ocean velocity (usually before) |
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256 | !! |
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257 | !! NB: - ice-ocean rotation angle no more allowed |
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258 | !! - here we make an approximation: taum is only computed every ice time step |
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259 | !! This avoids mutiple average to pass from T -> U,V grids and next from U,V grids |
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260 | !! to T grid. taum is used in TKE and GLS, which should not be too sensitive to this approximaton... |
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261 | !! |
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262 | !! ** Outputs : - utau, vtau : surface ocean i- and j-stress (u- & v-pts) updated with ice-ocean fluxes |
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263 | !! - taum : modulus of the surface ocean stress (T-point) updated with ice-ocean fluxes |
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264 | !!--------------------------------------------------------------------- |
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265 | INTEGER , INTENT(in) :: kt ! ocean time-step index |
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266 | REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: pu_oce, pv_oce ! surface ocean currents |
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267 | !! |
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268 | INTEGER :: ji, jj ! dummy loop indices |
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269 | REAL(wp) :: zat_u, zutau_ice, zu_t, zmodt ! local scalar |
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270 | REAL(wp) :: zat_v, zvtau_ice, zv_t ! - - |
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271 | !!--------------------------------------------------------------------- |
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272 | ! |
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273 | IF( MOD( kt-1, nn_fsbc ) == 0 ) THEN !== Ice time-step only ==! (i.e. surface module time-step) |
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274 | !CDIR NOVERRCHK |
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275 | DO jj = 2, jpjm1 !* update the modulus of stress at ocean surface (T-point) |
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276 | !CDIR NOVERRCHK |
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277 | DO ji = fs_2, fs_jpim1 |
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278 | ! ! 2*(U_ice-U_oce) at T-point |
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279 | zu_t = u_ice(ji,jj) + u_ice(ji-1,jj) - u_oce(ji,jj) - u_oce(ji-1,jj) |
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280 | zv_t = v_ice(ji,jj) + v_ice(ji,jj-1) - v_oce(ji,jj) - v_oce(ji,jj-1) |
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281 | ! ! |U_ice-U_oce|^2 |
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282 | zmodt = 0.25_wp * ( zu_t * zu_t + zv_t * zv_t ) |
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283 | ! ! update the ocean stress modulus |
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284 | taum(ji,jj) = ( 1._wp - at_i(ji,jj) ) * taum(ji,jj) + at_i(ji,jj) * rhoco * zmodt |
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285 | tmod_io(ji,jj) = rhoco * SQRT( zmodt ) ! rhoco * |U_ice-U_oce| at T-point |
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286 | END DO |
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287 | END DO |
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288 | CALL lbc_lnk( taum, 'T', 1. ) ; CALL lbc_lnk( tmod_io, 'T', 1. ) |
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289 | ! |
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290 | utau_oce(:,:) = utau(:,:) !* save the air-ocean stresses at ice time-step |
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291 | vtau_oce(:,:) = vtau(:,:) |
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292 | ! |
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293 | ENDIF |
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294 | ! |
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295 | ! !== every ocean time-step ==! |
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296 | ! |
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297 | DO jj = 2, jpjm1 !* update the stress WITHOUT a ice-ocean rotation angle |
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298 | DO ji = fs_2, fs_jpim1 ! Vect. Opt. |
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299 | zat_u = ( at_i(ji,jj) + at_i(ji+1,jj) ) * 0.5_wp ! ice area at u and V-points |
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300 | zat_v = ( at_i(ji,jj) + at_i(ji,jj+1) ) * 0.5_wp |
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301 | ! ! linearized quadratic drag formulation |
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302 | zutau_ice = 0.5_wp * ( tmod_io(ji,jj) + tmod_io(ji+1,jj) ) * ( u_ice(ji,jj) - pu_oce(ji,jj) ) |
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303 | zvtau_ice = 0.5_wp * ( tmod_io(ji,jj) + tmod_io(ji,jj+1) ) * ( v_ice(ji,jj) - pv_oce(ji,jj) ) |
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304 | ! ! stresses at the ocean surface |
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305 | utau(ji,jj) = ( 1._wp - zat_u ) * utau_oce(ji,jj) + zat_u * zutau_ice |
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306 | vtau(ji,jj) = ( 1._wp - zat_v ) * vtau_oce(ji,jj) + zat_v * zvtau_ice |
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307 | END DO |
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308 | END DO |
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309 | CALL lbc_lnk( utau, 'U', -1. ) ; CALL lbc_lnk( vtau, 'V', -1. ) ! lateral boundary condition |
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310 | ! |
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311 | IF(ln_ctl) CALL prt_ctl( tab2d_1=utau, clinfo1=' lim_sbc: utau : ', mask1=umask, & |
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312 | & tab2d_2=vtau, clinfo2=' vtau : ' , mask2=vmask ) |
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313 | ! |
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314 | END SUBROUTINE lim_sbc_tau |
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315 | |
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316 | |
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317 | SUBROUTINE lim_sbc_init |
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318 | !!------------------------------------------------------------------- |
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319 | !! *** ROUTINE lim_sbc_init *** |
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320 | !! |
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321 | !! ** Purpose : Preparation of the file ice_evolu for the output of |
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322 | !! the temporal evolution of key variables |
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323 | !! |
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324 | !! ** input : Namelist namicedia |
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325 | !!------------------------------------------------------------------- |
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326 | REAL(wp) :: zsum, zarea |
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327 | ! |
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328 | INTEGER :: ji, jj ! dummy loop indices |
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329 | REAL(wp) :: zcoefu, zcoefv, zcoeff ! local scalar |
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330 | IF(lwp) WRITE(numout,*) |
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331 | IF(lwp) WRITE(numout,*) 'lim_sbc_init : LIM-3 sea-ice - surface boundary condition' |
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332 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~~ ' |
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333 | |
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334 | ! ! allocate lim_sbc array |
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335 | IF( lim_sbc_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'lim_sbc_init : unable to allocate standard arrays' ) |
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336 | ! |
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337 | soce_0(:,:) = soce ! constant SSS and ice salinity used in levitating sea-ice case |
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338 | sice_0(:,:) = sice |
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339 | ! |
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340 | IF( cp_cfg == "orca" ) THEN ! decrease ocean & ice reference salinities in the Baltic sea |
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341 | WHERE( 14._wp <= glamt(:,:) .AND. glamt(:,:) <= 32._wp .AND. & |
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342 | & 54._wp <= gphit(:,:) .AND. gphit(:,:) <= 66._wp ) |
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343 | soce_0(:,:) = 4._wp |
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344 | sice_0(:,:) = 2._wp |
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345 | END WHERE |
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346 | ENDIF |
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347 | ! clem modif |
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348 | IF( .NOT. ln_rstart ) THEN |
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349 | iatte(:,:) = 1._wp |
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350 | oatte(:,:) = 1._wp |
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351 | ENDIF |
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352 | ! |
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353 | ! clem: snwice_mass in the restart file now |
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354 | IF( .NOT. ln_rstart ) THEN |
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355 | ! ! embedded sea ice |
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356 | IF( nn_ice_embd /= 0 ) THEN ! mass exchanges between ice and ocean (case 1 or 2) set the snow+ice mass |
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357 | snwice_mass (:,:) = tms(:,:) * ( rhosn * vt_s(:,:) + rhoic * vt_i(:,:) ) |
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358 | snwice_mass_b(:,:) = snwice_mass(:,:) |
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359 | ELSE |
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360 | snwice_mass (:,:) = 0.0_wp ! no mass exchanges |
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361 | snwice_mass_b(:,:) = 0.0_wp ! no mass exchanges |
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362 | ENDIF |
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363 | IF( nn_ice_embd == 2 ) THEN ! full embedment (case 2) deplete the initial ssh below sea-ice area |
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364 | sshn(:,:) = sshn(:,:) - snwice_mass(:,:) * r1_rau0 |
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365 | sshb(:,:) = sshb(:,:) - snwice_mass(:,:) * r1_rau0 |
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366 | ! |
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367 | ! Note: Changed the initial values of sshb and sshn=> need to recompute ssh[u,v,f]_[b,n] |
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368 | ! which were previously set in domvvl |
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369 | IF ( lk_vvl ) THEN ! Is this necessary? embd 2 should be restricted to vvl only??? |
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370 | DO jj = 1, jpjm1 |
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371 | DO ji = 1, jpim1 ! caution: use of Vector Opt. not possible |
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372 | zcoefu = 0.5 * umask(ji,jj,1) / ( e1u(ji,jj) * e2u(ji,jj) ) |
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373 | zcoefv = 0.5 * vmask(ji,jj,1) / ( e1v(ji,jj) * e2v(ji,jj) ) |
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374 | zcoeff = 0.25 * umask(ji,jj,1) * umask(ji,jj+1,1) |
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375 | sshu_b(ji,jj) = zcoefu * ( e1t(ji ,jj) * e2t(ji ,jj) * sshb(ji ,jj) & |
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376 | & + e1t(ji+1,jj) * e2t(ji+1,jj) * sshb(ji+1,jj) ) |
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377 | sshv_b(ji,jj) = zcoefv * ( e1t(ji,jj ) * e2t(ji,jj ) * sshb(ji,jj ) & |
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378 | & + e1t(ji,jj+1) * e2t(ji,jj+1) * sshb(ji,jj+1) ) |
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379 | sshu_n(ji,jj) = zcoefu * ( e1t(ji ,jj) * e2t(ji ,jj) * sshn(ji ,jj) & |
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380 | & + e1t(ji+1,jj) * e2t(ji+1,jj) * sshn(ji+1,jj) ) |
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381 | sshv_n(ji,jj) = zcoefv * ( e1t(ji,jj ) * e2t(ji,jj ) * sshn(ji,jj ) & |
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382 | & + e1t(ji,jj+1) * e2t(ji,jj+1) * sshn(ji,jj+1) ) |
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383 | END DO |
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384 | END DO |
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385 | CALL lbc_lnk( sshu_b, 'U', 1. ) ; CALL lbc_lnk( sshu_n, 'U', 1. ) |
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386 | CALL lbc_lnk( sshv_b, 'V', 1. ) ; CALL lbc_lnk( sshv_n, 'V', 1. ) |
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387 | DO jj = 1, jpjm1 |
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388 | DO ji = 1, jpim1 ! NO Vector Opt. |
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389 | sshf_n(ji,jj) = 0.5 * umask(ji,jj,1) * umask(ji,jj+1,1) & |
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390 | & / ( e1f(ji,jj ) * e2f(ji,jj ) ) & |
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391 | & * ( e1u(ji,jj ) * e2u(ji,jj ) * sshu_n(ji,jj ) & |
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392 | & + e1u(ji,jj+1) * e2u(ji,jj+1) * sshu_n(ji,jj+1) ) |
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393 | END DO |
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394 | END DO |
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395 | CALL lbc_lnk( sshf_n, 'F', 1. ) |
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396 | ENDIF |
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397 | ENDIF |
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398 | ENDIF ! .NOT. ln_rstart |
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399 | ! |
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400 | |
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401 | END SUBROUTINE lim_sbc_init |
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402 | |
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403 | #else |
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404 | !!---------------------------------------------------------------------- |
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405 | !! Default option : Dummy module NO LIM 3.0 sea-ice model |
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406 | !!---------------------------------------------------------------------- |
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407 | CONTAINS |
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408 | SUBROUTINE lim_sbc ! Dummy routine |
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409 | END SUBROUTINE lim_sbc |
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410 | #endif |
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411 | |
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412 | !!====================================================================== |
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413 | END MODULE limsbc |
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