1 | MODULE sbc_oce |
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2 | !!====================================================================== |
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3 | !! *** MODULE sbc_oce *** |
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4 | !! Surface module : variables defined in core memory |
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5 | !!====================================================================== |
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6 | !! History : 3.0 ! 2006-06 (G. Madec) Original code |
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7 | !! - ! 2008-08 (G. Madec) namsbc moved from sbcmod |
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8 | !! 3.3 ! 2010-04 (M. Leclair, G. Madec) Forcing averaged over 2 time steps |
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9 | !! - ! 2010-11 (G. Madec) ice-ocean stress always computed at each ocean time-step |
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10 | !! 3.3 ! 2010-10 (J. Chanut, C. Bricaud) add the surface pressure forcing |
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11 | !!---------------------------------------------------------------------- |
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12 | |
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13 | !!---------------------------------------------------------------------- |
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14 | !! sbc_oce_alloc : allocation of sbc arrays |
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15 | !! sbc_tau2wnd : wind speed estimated from wind stress |
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16 | !!---------------------------------------------------------------------- |
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17 | USE par_oce ! ocean parameters |
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18 | USE in_out_manager ! I/O manager |
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19 | USE lib_mpp ! MPP library |
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20 | |
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21 | IMPLICIT NONE |
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22 | PRIVATE |
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23 | |
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24 | PUBLIC sbc_oce_alloc ! routine called in sbcmod.F90 |
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25 | PUBLIC sbc_tau2wnd ! routine called in several sbc modules |
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26 | |
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27 | !!---------------------------------------------------------------------- |
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28 | !! Namelist for the Ocean Surface Boundary Condition |
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29 | !!---------------------------------------------------------------------- |
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30 | ! !!* namsbc namelist * |
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31 | LOGICAL , PUBLIC :: ln_ana = .FALSE. !: analytical boundary condition flag |
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32 | LOGICAL , PUBLIC :: ln_flx = .FALSE. !: flux formulation |
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33 | LOGICAL , PUBLIC :: ln_blk_clio = .FALSE. !: CLIO bulk formulation |
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34 | LOGICAL , PUBLIC :: ln_blk_core = .FALSE. !: CORE bulk formulation |
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35 | LOGICAL , PUBLIC :: ln_blk_mfs = .FALSE. !: MFS bulk formulation |
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36 | LOGICAL , PUBLIC :: ln_cpl = .FALSE. !: coupled formulation (overwritten by key_sbc_coupled ) |
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37 | LOGICAL , PUBLIC :: ln_dm2dc = .FALSE. !: Daily mean to Diurnal Cycle short wave (qsr) |
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38 | LOGICAL , PUBLIC :: ln_rnf = .FALSE. !: runoffs / runoff mouths |
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39 | LOGICAL , PUBLIC :: ln_ssr = .FALSE. !: Sea Surface restoring on SST and/or SSS |
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40 | LOGICAL , PUBLIC :: ln_apr_dyn = .FALSE. !: Atmospheric pressure forcing used on dynamics (ocean & ice) |
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41 | LOGICAL , PUBLIC :: ln_icebergs = .FALSE. !: Icebergs |
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42 | INTEGER , PUBLIC :: nn_ice = 0 !: flag for ice in the surface boundary condition (=0/1/2/3) |
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43 | INTEGER , PUBLIC :: nn_ice_embd = 0 !: flag for levitating/embedding sea-ice in the ocean |
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44 | ! !: =0 levitating ice (no mass exchange, concentration/dilution effect) |
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45 | ! !: =1 levitating ice with mass and salt exchange but no presure effect |
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46 | ! !: =2 embedded sea-ice (full salt and mass exchanges and pressure) |
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47 | INTEGER , PUBLIC :: nn_fwb = 0 !: FreshWater Budget: |
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48 | ! !: = 0 unchecked |
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49 | ! !: = 1 global mean of e-p-r set to zero at each nn_fsbc time step |
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50 | ! !: = 2 annual global mean of e-p-r set to zero |
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51 | LOGICAL , PUBLIC :: ln_wave = .FALSE. !: true if some coupling with wave model |
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52 | LOGICAL , PUBLIC :: ln_cdgw = .FALSE. !: true if neutral drag coefficient from wave model |
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53 | LOGICAL , PUBLIC :: ln_sdw = .FALSE. !: true if 3d stokes drift from wave model |
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54 | |
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55 | !!---------------------------------------------------------------------- |
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56 | !! Ocean Surface Boundary Condition fields |
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57 | !!---------------------------------------------------------------------- |
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58 | LOGICAL , PUBLIC :: lhftau = .FALSE. !: HF tau used in TKE: mean(stress module) - module(mean stress) |
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59 | !! !! now ! before !! |
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60 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: utau , utau_b !: sea surface i-stress (ocean referential) [N/m2] |
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61 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: vtau , vtau_b !: sea surface j-stress (ocean referential) [N/m2] |
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62 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: taum !: module of sea surface stress (at T-point) [N/m2] |
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63 | !! wndm is used onmpute surface gases exchanges in ice-free ocean or leads |
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64 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: wndm !: wind speed module at T-point (=|U10m-Uoce|) [m/s] |
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65 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: qsr !: sea heat flux: solar [W/m2] |
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66 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: qns , qns_b !: sea heat flux: non solar [W/m2] |
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67 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: qsr_tot !: total solar heat flux (over sea and ice) [W/m2] |
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68 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: qns_tot !: total non solar heat flux (over sea and ice) [W/m2] |
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69 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: emp , emp_b !: freshwater budget: volume flux [Kg/m2/s] |
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70 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: sfx , sfx_b !: salt flux [PSU/m2/s] |
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71 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: emp_tot !: total E-P over ocean and ice [Kg/m2/s] |
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72 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: fmmflx !: freshwater budget: freezing/melting [Kg/m2/s] |
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73 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: rnf , rnf_b !: river runoff [Kg/m2/s] |
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74 | !! |
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75 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sbc_tsc, sbc_tsc_b !: sbc content trend [K.m/s] jpi,jpj,jpts |
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76 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: qsr_hc , qsr_hc_b !: heat content trend due to qsr flux [K.m/s] jpi,jpj,jpk |
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77 | !! |
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78 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: tprecip !: total precipitation [Kg/m2/s] |
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79 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: sprecip !: solid precipitation [Kg/m2/s] |
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80 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: fr_i !: ice fraction = 1 - lead fraction (between 0 to 1) |
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81 | #if defined key_cpl_carbon_cycle |
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82 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: atm_co2 !: atmospheric pCO2 [ppm] |
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83 | #endif |
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84 | |
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85 | !!---------------------------------------------------------------------- |
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86 | !! Sea Surface Mean fields |
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87 | !!---------------------------------------------------------------------- |
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88 | INTEGER , PUBLIC :: nn_fsbc !: frequency of sbc computation (as well as sea-ice model) |
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89 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: ssu_m !: mean (nn_fsbc time-step) surface sea i-current (U-point) [m/s] |
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90 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: ssv_m !: mean (nn_fsbc time-step) surface sea j-current (V-point) [m/s] |
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91 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: sst_m !: mean (nn_fsbc time-step) surface sea temperature [Celsius] |
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92 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: sss_m !: mean (nn_fsbc time-step) surface sea salinity [psu] |
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93 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: ssh_m !: mean (nn_fsbc time-step) sea surface height [m] |
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94 | |
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95 | !! * Substitutions |
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96 | # include "vectopt_loop_substitute.h90" |
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97 | !!---------------------------------------------------------------------- |
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98 | !! NEMO/OPA 4.0 , NEMO Consortium (2011) |
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99 | !! $Id$ |
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100 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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101 | !!---------------------------------------------------------------------- |
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102 | CONTAINS |
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103 | |
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104 | INTEGER FUNCTION sbc_oce_alloc() |
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105 | !!--------------------------------------------------------------------- |
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106 | !! *** FUNCTION sbc_oce_alloc *** |
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107 | !!--------------------------------------------------------------------- |
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108 | INTEGER :: ierr(4) |
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109 | !!--------------------------------------------------------------------- |
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110 | ierr(:) = 0 |
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111 | ! |
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112 | ALLOCATE( utau(jpi,jpj) , utau_b(jpi,jpj) , taum(jpi,jpj) , & |
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113 | & vtau(jpi,jpj) , vtau_b(jpi,jpj) , wndm(jpi,jpj) , STAT=ierr(1) ) |
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114 | ! |
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115 | ALLOCATE( qns_tot(jpi,jpj) , qns (jpi,jpj) , qns_b(jpi,jpj), & |
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116 | & qsr_tot(jpi,jpj) , qsr (jpi,jpj) , & |
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117 | & emp (jpi,jpj) , emp_b(jpi,jpj) , & |
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118 | & sfx (jpi,jpj) , sfx_b(jpi,jpj) , emp_tot(jpi,jpj), fmmflx(jpi,jpj), STAT=ierr(2) ) |
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119 | ! |
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120 | ALLOCATE( rnf (jpi,jpj) , sbc_tsc (jpi,jpj,jpts) , qsr_hc (jpi,jpj,jpk) , & |
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121 | & rnf_b(jpi,jpj) , sbc_tsc_b(jpi,jpj,jpts) , qsr_hc_b(jpi,jpj,jpk) , STAT=ierr(3) ) |
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122 | ! |
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123 | ALLOCATE( tprecip(jpi,jpj) , sprecip(jpi,jpj) , fr_i(jpi,jpj) , & |
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124 | #if defined key_cpl_carbon_cycle |
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125 | & atm_co2(jpi,jpj) , & |
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126 | #endif |
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127 | & ssu_m (jpi,jpj) , sst_m(jpi,jpj) , & |
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128 | & ssv_m (jpi,jpj) , sss_m (jpi,jpj), ssh_m(jpi,jpj) , STAT=ierr(4) ) |
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129 | ! |
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130 | sbc_oce_alloc = MAXVAL( ierr ) |
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131 | IF( lk_mpp ) CALL mpp_sum ( sbc_oce_alloc ) |
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132 | IF( sbc_oce_alloc > 0 ) CALL ctl_warn('sbc_oce_alloc: allocation of arrays failed') |
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133 | ! |
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134 | END FUNCTION sbc_oce_alloc |
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135 | |
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136 | |
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137 | SUBROUTINE sbc_tau2wnd |
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138 | !!--------------------------------------------------------------------- |
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139 | !! *** ROUTINE sbc_tau2wnd *** |
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140 | !! |
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141 | !! ** Purpose : Estimation of wind speed as a function of wind stress |
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142 | !! |
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143 | !! ** Method : |tau|=rhoa*Cd*|U|^2 |
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144 | !!--------------------------------------------------------------------- |
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145 | USE dom_oce ! ocean space and time domain |
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146 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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147 | REAL(wp) :: zrhoa = 1.22 ! Air density kg/m3 |
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148 | REAL(wp) :: zcdrag = 1.5e-3 ! drag coefficient |
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149 | REAL(wp) :: ztx, zty, ztau, zcoef ! temporary variables |
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150 | INTEGER :: ji, jj ! dummy indices |
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151 | !!--------------------------------------------------------------------- |
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152 | zcoef = 0.5 / ( zrhoa * zcdrag ) |
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153 | !CDIR NOVERRCHK |
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154 | DO jj = 2, jpjm1 |
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155 | !CDIR NOVERRCHK |
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156 | DO ji = fs_2, fs_jpim1 ! vect. opt. |
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157 | ztx = utau(ji-1,jj ) + utau(ji,jj) |
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158 | zty = vtau(ji ,jj-1) + vtau(ji,jj) |
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159 | ztau = SQRT( ztx * ztx + zty * zty ) |
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160 | wndm(ji,jj) = SQRT ( ztau * zcoef ) * tmask(ji,jj,1) |
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161 | END DO |
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162 | END DO |
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163 | CALL lbc_lnk( wndm(:,:) , 'T', 1. ) |
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164 | ! |
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165 | END SUBROUTINE sbc_tau2wnd |
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166 | |
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167 | !!====================================================================== |
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168 | END MODULE sbc_oce |
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