1 | MODULE asminc |
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2 | !!====================================================================== |
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3 | !! *** MODULE asminc *** |
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4 | !! Assimilation increment : Apply an increment generated by data |
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5 | !! assimilation |
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6 | !!====================================================================== |
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7 | !! History : ! 2007-03 (M. Martin) Met Office version |
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8 | !! ! 2007-04 (A. Weaver) calc_date original code |
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9 | !! ! 2007-04 (A. Weaver) Merge with OPAVAR/NEMOVAR |
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10 | !! NEMO 3.3 ! 2010-05 (D. Lea) Update to work with NEMO v3.2 |
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11 | !! - ! 2010-05 (D. Lea) add calc_month_len routine based on day_init |
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12 | !! 3.4 ! 2012-10 (A. Weaver and K. Mogensen) Fix for direct initialization |
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13 | !!---------------------------------------------------------------------- |
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14 | |
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15 | !!---------------------------------------------------------------------- |
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16 | !! 'key_asminc' : Switch on the assimilation increment interface |
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17 | !!---------------------------------------------------------------------- |
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18 | !! asm_inc_init : Initialize the increment arrays and IAU weights |
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19 | !! calc_date : Compute the calendar date YYYYMMDD on a given step |
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20 | !! tra_asm_inc : Apply the tracer (T and S) increments |
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21 | !! dyn_asm_inc : Apply the dynamic (u and v) increments |
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22 | !! ssh_asm_inc : Apply the SSH increment |
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23 | !! seaice_asm_inc : Apply the seaice increment |
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24 | !!---------------------------------------------------------------------- |
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25 | USE wrk_nemo ! Memory Allocation |
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26 | USE par_oce ! Ocean space and time domain variables |
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27 | USE dom_oce ! Ocean space and time domain |
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28 | USE domvvl ! domain: variable volume level |
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29 | USE oce ! Dynamics and active tracers defined in memory |
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30 | USE ldfdyn_oce ! ocean dynamics: lateral physics |
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31 | USE eosbn2 ! Equation of state - in situ and potential density |
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32 | USE zpshde ! Partial step : Horizontal Derivative |
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33 | USE iom ! Library to read input files |
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34 | USE asmpar ! Parameters for the assmilation interface |
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35 | USE c1d ! 1D initialization |
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36 | USE in_out_manager ! I/O manager |
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37 | USE lib_mpp ! MPP library |
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38 | #if defined key_lim2 |
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39 | USE ice_2 ! LIM2 |
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40 | #endif |
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41 | USE sbc_oce ! Surface boundary condition variables. |
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42 | |
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43 | IMPLICIT NONE |
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44 | PRIVATE |
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45 | |
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46 | PUBLIC asm_inc_init !: Initialize the increment arrays and IAU weights |
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47 | PUBLIC calc_date !: Compute the calendar date YYYYMMDD on a given step |
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48 | PUBLIC tra_asm_inc !: Apply the tracer (T and S) increments |
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49 | PUBLIC dyn_asm_inc !: Apply the dynamic (u and v) increments |
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50 | PUBLIC ssh_asm_inc !: Apply the SSH increment |
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51 | PUBLIC seaice_asm_inc !: Apply the seaice increment |
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52 | |
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53 | #if defined key_asminc |
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54 | LOGICAL, PUBLIC, PARAMETER :: lk_asminc = .TRUE. !: Logical switch for assimilation increment interface |
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55 | #else |
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56 | LOGICAL, PUBLIC, PARAMETER :: lk_asminc = .FALSE. !: No assimilation increments |
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57 | #endif |
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58 | LOGICAL, PUBLIC :: ln_bkgwri = .FALSE. !: No output of the background state fields |
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59 | LOGICAL, PUBLIC :: ln_asmiau = .FALSE. !: No applying forcing with an assimilation increment |
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60 | LOGICAL, PUBLIC :: ln_asmdin = .FALSE. !: No direct initialization |
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61 | LOGICAL, PUBLIC :: ln_trainc = .FALSE. !: No tracer (T and S) assimilation increments |
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62 | LOGICAL, PUBLIC :: ln_dyninc = .FALSE. !: No dynamics (u and v) assimilation increments |
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63 | LOGICAL, PUBLIC :: ln_sshinc = .FALSE. !: No sea surface height assimilation increment |
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64 | LOGICAL, PUBLIC :: ln_seaiceinc !: No sea ice concentration increment |
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65 | LOGICAL, PUBLIC :: ln_salfix = .FALSE. !: Apply minimum salinity check |
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66 | LOGICAL, PUBLIC :: ln_temnofreeze = .FALSE. !: Don't allow the temperature to drop below freezing |
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67 | INTEGER, PUBLIC :: nn_divdmp !: Apply divergence damping filter nn_divdmp times |
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68 | |
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69 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: t_bkg , s_bkg !: Background temperature and salinity |
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70 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: u_bkg , v_bkg !: Background u- & v- velocity components |
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71 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: t_bkginc, s_bkginc !: Increment to the background T & S |
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72 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: u_bkginc, v_bkginc !: Increment to the u- & v-components |
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73 | REAL(wp), PUBLIC, DIMENSION(:) , ALLOCATABLE :: wgtiau !: IAU weights for each time step |
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74 | #if defined key_asminc |
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75 | REAL(wp), PUBLIC, DIMENSION(:,:), ALLOCATABLE :: ssh_iau !: IAU-weighted sea surface height increment |
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76 | #endif |
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77 | ! !!! time steps relative to the cycle interval [0,nitend-nit000-1] |
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78 | INTEGER , PUBLIC :: nitbkg !: Time step of the background state used in the Jb term |
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79 | INTEGER , PUBLIC :: nitdin !: Time step of the background state for direct initialization |
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80 | INTEGER , PUBLIC :: nitiaustr !: Time step of the start of the IAU interval |
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81 | INTEGER , PUBLIC :: nitiaufin !: Time step of the end of the IAU interval |
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82 | ! |
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83 | INTEGER , PUBLIC :: niaufn !: Type of IAU weighing function: = 0 Constant weighting |
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84 | ! !: = 1 Linear hat-like, centred in middle of IAU interval |
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85 | REAL(wp), PUBLIC :: salfixmin !: Ensure that the salinity is larger than this value if (ln_salfix) |
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86 | |
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87 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: ssh_bkg, ssh_bkginc ! Background sea surface height and its increment |
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88 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: seaice_bkginc ! Increment to the background sea ice conc |
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89 | |
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90 | !! * Substitutions |
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91 | # include "domzgr_substitute.h90" |
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92 | # include "ldfdyn_substitute.h90" |
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93 | # include "vectopt_loop_substitute.h90" |
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94 | !!---------------------------------------------------------------------- |
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95 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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96 | !! $Id$ |
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97 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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98 | !!---------------------------------------------------------------------- |
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99 | CONTAINS |
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100 | |
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101 | SUBROUTINE asm_inc_init |
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102 | !!---------------------------------------------------------------------- |
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103 | !! *** ROUTINE asm_inc_init *** |
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104 | !! |
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105 | !! ** Purpose : Initialize the assimilation increment and IAU weights. |
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106 | !! |
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107 | !! ** Method : Initialize the assimilation increment and IAU weights. |
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108 | !! |
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109 | !! ** Action : |
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110 | !!---------------------------------------------------------------------- |
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111 | INTEGER :: ji, jj, jk, jt ! dummy loop indices |
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112 | INTEGER :: imid, inum ! local integers |
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113 | INTEGER :: ios ! Local integer output status for namelist read |
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114 | INTEGER :: iiauper ! Number of time steps in the IAU period |
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115 | INTEGER :: icycper ! Number of time steps in the cycle |
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116 | INTEGER :: iitend_date ! Date YYYYMMDD of final time step |
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117 | INTEGER :: iitbkg_date ! Date YYYYMMDD of background time step for Jb term |
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118 | INTEGER :: iitdin_date ! Date YYYYMMDD of background time step for DI |
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119 | INTEGER :: iitiaustr_date ! Date YYYYMMDD of IAU interval start time step |
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120 | INTEGER :: iitiaufin_date ! Date YYYYMMDD of IAU interval final time step |
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121 | ! |
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122 | REAL(wp) :: znorm ! Normalization factor for IAU weights |
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123 | REAL(wp) :: ztotwgt ! Value of time-integrated IAU weights (should be equal to one) |
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124 | REAL(wp) :: z_inc_dateb ! Start date of interval on which increment is valid |
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125 | REAL(wp) :: z_inc_datef ! End date of interval on which increment is valid |
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126 | REAL(wp) :: zdate_bkg ! Date in background state file for DI |
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127 | REAL(wp) :: zdate_inc ! Time axis in increments file |
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128 | ! |
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129 | REAL(wp), POINTER, DIMENSION(:,:) :: hdiv ! 2D workspace |
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130 | !! |
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131 | NAMELIST/nam_asminc/ ln_bkgwri, & |
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132 | & ln_trainc, ln_dyninc, ln_sshinc, & |
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133 | & ln_asmdin, ln_asmiau, & |
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134 | & nitbkg, nitdin, nitiaustr, nitiaufin, niaufn, & |
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135 | & ln_salfix, salfixmin, nn_divdmp |
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136 | !!---------------------------------------------------------------------- |
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137 | |
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138 | !----------------------------------------------------------------------- |
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139 | ! Read Namelist nam_asminc : assimilation increment interface |
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140 | !----------------------------------------------------------------------- |
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141 | ln_seaiceinc = .FALSE. |
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142 | ln_temnofreeze = .FALSE. |
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143 | |
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144 | REWIND( numnam_ref ) ! Namelist nam_asminc in reference namelist : Assimilation increment |
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145 | READ ( numnam_ref, nam_asminc, IOSTAT = ios, ERR = 901) |
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146 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nam_asminc in reference namelist', lwp ) |
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147 | |
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148 | REWIND( numnam_cfg ) ! Namelist nam_asminc in configuration namelist : Assimilation increment |
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149 | READ ( numnam_cfg, nam_asminc, IOSTAT = ios, ERR = 902 ) |
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150 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nam_asminc in configuration namelist', lwp ) |
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151 | IF(lwm) WRITE ( numond, nam_asminc ) |
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152 | |
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153 | ! Control print |
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154 | IF(lwp) THEN |
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155 | WRITE(numout,*) |
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156 | WRITE(numout,*) 'asm_inc_init : Assimilation increment initialization :' |
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157 | WRITE(numout,*) '~~~~~~~~~~~~' |
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158 | WRITE(numout,*) ' Namelist namasm : set assimilation increment parameters' |
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159 | WRITE(numout,*) ' Logical switch for writing out background state ln_bkgwri = ', ln_bkgwri |
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160 | WRITE(numout,*) ' Logical switch for applying tracer increments ln_trainc = ', ln_trainc |
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161 | WRITE(numout,*) ' Logical switch for applying velocity increments ln_dyninc = ', ln_dyninc |
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162 | WRITE(numout,*) ' Logical switch for applying SSH increments ln_sshinc = ', ln_sshinc |
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163 | WRITE(numout,*) ' Logical switch for Direct Initialization (DI) ln_asmdin = ', ln_asmdin |
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164 | WRITE(numout,*) ' Logical switch for applying sea ice increments ln_seaiceinc = ', ln_seaiceinc |
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165 | WRITE(numout,*) ' Logical switch for Incremental Analysis Updating (IAU) ln_asmiau = ', ln_asmiau |
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166 | WRITE(numout,*) ' Timestep of background in [0,nitend-nit000-1] nitbkg = ', nitbkg |
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167 | WRITE(numout,*) ' Timestep of background for DI in [0,nitend-nit000-1] nitdin = ', nitdin |
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168 | WRITE(numout,*) ' Timestep of start of IAU interval in [0,nitend-nit000-1] nitiaustr = ', nitiaustr |
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169 | WRITE(numout,*) ' Timestep of end of IAU interval in [0,nitend-nit000-1] nitiaufin = ', nitiaufin |
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170 | WRITE(numout,*) ' Type of IAU weighting function niaufn = ', niaufn |
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171 | WRITE(numout,*) ' Logical switch for ensuring that the sa > salfixmin ln_salfix = ', ln_salfix |
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172 | WRITE(numout,*) ' Minimum salinity after applying the increments salfixmin = ', salfixmin |
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173 | ENDIF |
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174 | |
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175 | nitbkg_r = nitbkg + nit000 - 1 ! Background time referenced to nit000 |
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176 | nitdin_r = nitdin + nit000 - 1 ! Background time for DI referenced to nit000 |
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177 | nitiaustr_r = nitiaustr + nit000 - 1 ! Start of IAU interval referenced to nit000 |
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178 | nitiaufin_r = nitiaufin + nit000 - 1 ! End of IAU interval referenced to nit000 |
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179 | |
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180 | iiauper = nitiaufin_r - nitiaustr_r + 1 ! IAU interval length |
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181 | icycper = nitend - nit000 + 1 ! Cycle interval length |
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182 | |
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183 | CALL calc_date( nit000, nitend , ndate0, iitend_date ) ! Date of final time step |
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184 | CALL calc_date( nit000, nitbkg_r , ndate0, iitbkg_date ) ! Background time for Jb referenced to ndate0 |
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185 | CALL calc_date( nit000, nitdin_r , ndate0, iitdin_date ) ! Background time for DI referenced to ndate0 |
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186 | CALL calc_date( nit000, nitiaustr_r, ndate0, iitiaustr_date ) ! IAU start time referenced to ndate0 |
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187 | CALL calc_date( nit000, nitiaufin_r, ndate0, iitiaufin_date ) ! IAU end time referenced to ndate0 |
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188 | ! |
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189 | IF(lwp) THEN |
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190 | WRITE(numout,*) |
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191 | WRITE(numout,*) ' Time steps referenced to current cycle:' |
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192 | WRITE(numout,*) ' iitrst = ', nit000 - 1 |
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193 | WRITE(numout,*) ' nit000 = ', nit000 |
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194 | WRITE(numout,*) ' nitend = ', nitend |
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195 | WRITE(numout,*) ' nitbkg_r = ', nitbkg_r |
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196 | WRITE(numout,*) ' nitdin_r = ', nitdin_r |
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197 | WRITE(numout,*) ' nitiaustr_r = ', nitiaustr_r |
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198 | WRITE(numout,*) ' nitiaufin_r = ', nitiaufin_r |
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199 | WRITE(numout,*) |
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200 | WRITE(numout,*) ' Dates referenced to current cycle:' |
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201 | WRITE(numout,*) ' ndastp = ', ndastp |
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202 | WRITE(numout,*) ' ndate0 = ', ndate0 |
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203 | WRITE(numout,*) ' iitend_date = ', iitend_date |
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204 | WRITE(numout,*) ' iitbkg_date = ', iitbkg_date |
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205 | WRITE(numout,*) ' iitdin_date = ', iitdin_date |
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206 | WRITE(numout,*) ' iitiaustr_date = ', iitiaustr_date |
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207 | WRITE(numout,*) ' iitiaufin_date = ', iitiaufin_date |
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208 | ENDIF |
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209 | |
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210 | IF ( nacc /= 0 ) & |
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211 | & CALL ctl_stop( ' nacc /= 0 and key_asminc :', & |
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212 | & ' Assimilation increments have only been implemented', & |
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213 | & ' for synchronous time stepping' ) |
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214 | |
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215 | IF ( ( ln_asmdin ).AND.( ln_asmiau ) ) & |
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216 | & CALL ctl_stop( ' ln_asmdin and ln_asmiau :', & |
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217 | & ' Choose Direct Initialization OR Incremental Analysis Updating') |
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218 | |
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219 | IF ( ( ( .NOT. ln_asmdin ).AND.( .NOT. ln_asmiau ) ) & |
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220 | .AND.( ( ln_trainc ).OR.( ln_dyninc ).OR.( ln_sshinc ) .OR. ( ln_seaiceinc) )) & |
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221 | & CALL ctl_stop( ' One or more of ln_trainc, ln_dyninc, ln_sshinc and ln_seaiceinc is set to .true.', & |
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222 | & ' but ln_asmdin and ln_asmiau are both set to .false. :', & |
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223 | & ' Inconsistent options') |
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224 | |
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225 | IF ( ( niaufn /= 0 ).AND.( niaufn /= 1 ) ) & |
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226 | & CALL ctl_stop( ' niaufn /= 0 or niaufn /=1 :', & |
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227 | & ' Type IAU weighting function is invalid') |
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228 | |
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229 | IF ( ( .NOT. ln_trainc ).AND.( .NOT. ln_dyninc ).AND.( .NOT. ln_sshinc ).AND.( .NOT. ln_seaiceinc ) & |
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230 | & ) & |
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231 | & CALL ctl_warn( ' ln_trainc, ln_dyninc, ln_sshinc and ln_seaiceinc are set to .false. :', & |
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232 | & ' The assimilation increments are not applied') |
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233 | |
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234 | IF ( ( ln_asmiau ).AND.( nitiaustr == nitiaufin ) ) & |
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235 | & CALL ctl_stop( ' nitiaustr = nitiaufin :', & |
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236 | & ' IAU interval is of zero length') |
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237 | |
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238 | IF ( ( ln_asmiau ).AND.( ( nitiaustr_r < nit000 ).OR.( nitiaufin_r > nitend ) ) ) & |
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239 | & CALL ctl_stop( ' nitiaustr or nitiaufin :', & |
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240 | & ' IAU starting or final time step is outside the cycle interval', & |
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241 | & ' Valid range nit000 to nitend') |
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242 | |
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243 | IF ( ( nitbkg_r < nit000 - 1 ).OR.( nitbkg_r > nitend ) ) & |
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244 | & CALL ctl_stop( ' nitbkg :', & |
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245 | & ' Background time step is outside the cycle interval') |
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246 | |
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247 | IF ( ( nitdin_r < nit000 - 1 ).OR.( nitdin_r > nitend ) ) & |
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248 | & CALL ctl_stop( ' nitdin :', & |
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249 | & ' Background time step for Direct Initialization is outside', & |
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250 | & ' the cycle interval') |
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251 | |
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252 | IF ( nstop > 0 ) RETURN ! if there are any errors then go no further |
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253 | |
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254 | !-------------------------------------------------------------------- |
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255 | ! Initialize the Incremental Analysis Updating weighting function |
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256 | !-------------------------------------------------------------------- |
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257 | |
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258 | IF ( ln_asmiau ) THEN |
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259 | |
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260 | ALLOCATE( wgtiau( icycper ) ) |
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261 | |
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262 | wgtiau(:) = 0.0 |
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263 | |
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264 | IF ( niaufn == 0 ) THEN |
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265 | |
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266 | !--------------------------------------------------------- |
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267 | ! Constant IAU forcing |
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268 | !--------------------------------------------------------- |
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269 | |
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270 | DO jt = 1, iiauper |
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271 | wgtiau(jt+nitiaustr-1) = 1.0 / REAL( iiauper ) |
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272 | END DO |
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273 | |
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274 | ELSEIF ( niaufn == 1 ) THEN |
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275 | |
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276 | !--------------------------------------------------------- |
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277 | ! Linear hat-like, centred in middle of IAU interval |
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278 | !--------------------------------------------------------- |
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279 | |
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280 | ! Compute the normalization factor |
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281 | znorm = 0.0 |
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282 | IF ( MOD( iiauper, 2 ) == 0 ) THEN ! Even number of time steps in IAU interval |
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283 | imid = iiauper / 2 |
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284 | DO jt = 1, imid |
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285 | znorm = znorm + REAL( jt ) |
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286 | END DO |
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287 | znorm = 2.0 * znorm |
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288 | ELSE ! Odd number of time steps in IAU interval |
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289 | imid = ( iiauper + 1 ) / 2 |
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290 | DO jt = 1, imid - 1 |
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291 | znorm = znorm + REAL( jt ) |
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292 | END DO |
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293 | znorm = 2.0 * znorm + REAL( imid ) |
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294 | ENDIF |
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295 | znorm = 1.0 / znorm |
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296 | |
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297 | DO jt = 1, imid - 1 |
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298 | wgtiau(jt+nitiaustr-1) = REAL( jt ) * znorm |
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299 | END DO |
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300 | DO jt = imid, iiauper |
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301 | wgtiau(jt+nitiaustr-1) = REAL( iiauper - jt + 1 ) * znorm |
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302 | END DO |
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303 | |
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304 | ENDIF |
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305 | |
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306 | ! Test that the integral of the weights over the weighting interval equals 1 |
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307 | IF(lwp) THEN |
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308 | WRITE(numout,*) |
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309 | WRITE(numout,*) 'asm_inc_init : IAU weights' |
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310 | WRITE(numout,*) '~~~~~~~~~~~~' |
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311 | WRITE(numout,*) ' time step IAU weight' |
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312 | WRITE(numout,*) ' ========= =====================' |
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313 | ztotwgt = 0.0 |
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314 | DO jt = 1, icycper |
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315 | ztotwgt = ztotwgt + wgtiau(jt) |
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316 | WRITE(numout,*) ' ', jt, ' ', wgtiau(jt) |
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317 | END DO |
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318 | WRITE(numout,*) ' ===================================' |
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319 | WRITE(numout,*) ' Time-integrated weight = ', ztotwgt |
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320 | WRITE(numout,*) ' ===================================' |
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321 | ENDIF |
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322 | |
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323 | ENDIF |
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324 | |
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325 | !-------------------------------------------------------------------- |
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326 | ! Allocate and initialize the increment arrays |
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327 | !-------------------------------------------------------------------- |
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328 | |
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329 | ALLOCATE( t_bkginc(jpi,jpj,jpk) ) |
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330 | ALLOCATE( s_bkginc(jpi,jpj,jpk) ) |
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331 | ALLOCATE( u_bkginc(jpi,jpj,jpk) ) |
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332 | ALLOCATE( v_bkginc(jpi,jpj,jpk) ) |
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333 | ALLOCATE( ssh_bkginc(jpi,jpj) ) |
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334 | ALLOCATE( seaice_bkginc(jpi,jpj)) |
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335 | #if defined key_asminc |
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336 | ALLOCATE( ssh_iau(jpi,jpj) ) |
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337 | #endif |
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338 | t_bkginc(:,:,:) = 0.0 |
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339 | s_bkginc(:,:,:) = 0.0 |
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340 | u_bkginc(:,:,:) = 0.0 |
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341 | v_bkginc(:,:,:) = 0.0 |
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342 | ssh_bkginc(:,:) = 0.0 |
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343 | seaice_bkginc(:,:) = 0.0 |
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344 | #if defined key_asminc |
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345 | ssh_iau(:,:) = 0.0 |
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346 | #endif |
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347 | IF ( ( ln_trainc ).OR.( ln_dyninc ).OR.( ln_sshinc ).OR.( ln_seaiceinc ) ) THEN |
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348 | |
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349 | !-------------------------------------------------------------------- |
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350 | ! Read the increments from file |
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351 | !-------------------------------------------------------------------- |
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352 | |
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353 | CALL iom_open( c_asminc, inum ) |
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354 | |
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355 | CALL iom_get( inum, 'time', zdate_inc ) |
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356 | |
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357 | CALL iom_get( inum, 'z_inc_dateb', z_inc_dateb ) |
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358 | CALL iom_get( inum, 'z_inc_datef', z_inc_datef ) |
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359 | z_inc_dateb = zdate_inc |
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360 | z_inc_datef = zdate_inc |
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361 | |
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362 | IF(lwp) THEN |
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363 | WRITE(numout,*) |
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364 | WRITE(numout,*) 'asm_inc_init : Assimilation increments valid ', & |
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365 | & ' between dates ', NINT( z_inc_dateb ),' and ', & |
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366 | & NINT( z_inc_datef ) |
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367 | WRITE(numout,*) '~~~~~~~~~~~~' |
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368 | ENDIF |
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369 | |
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370 | IF ( ( NINT( z_inc_dateb ) < ndastp ) & |
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371 | & .OR.( NINT( z_inc_datef ) > iitend_date ) ) & |
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372 | & CALL ctl_warn( ' Validity time of assimilation increments is ', & |
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373 | & ' outside the assimilation interval' ) |
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374 | |
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375 | IF ( ( ln_asmdin ).AND.( NINT( zdate_inc ) /= iitdin_date ) ) & |
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376 | & CALL ctl_warn( ' Validity time of assimilation increments does ', & |
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377 | & ' not agree with Direct Initialization time' ) |
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378 | |
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379 | IF ( ln_trainc ) THEN |
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380 | CALL iom_get( inum, jpdom_autoglo, 'bckint', t_bkginc, 1 ) |
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381 | CALL iom_get( inum, jpdom_autoglo, 'bckins', s_bkginc, 1 ) |
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382 | ! Apply the masks |
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383 | t_bkginc(:,:,:) = t_bkginc(:,:,:) * tmask(:,:,:) |
---|
384 | s_bkginc(:,:,:) = s_bkginc(:,:,:) * tmask(:,:,:) |
---|
385 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
386 | ! to allow for differences in masks |
---|
387 | WHERE( ABS( t_bkginc(:,:,:) ) > 1.0e+10 ) t_bkginc(:,:,:) = 0.0 |
---|
388 | WHERE( ABS( s_bkginc(:,:,:) ) > 1.0e+10 ) s_bkginc(:,:,:) = 0.0 |
---|
389 | ENDIF |
---|
390 | |
---|
391 | IF ( ln_dyninc ) THEN |
---|
392 | CALL iom_get( inum, jpdom_autoglo, 'bckinu', u_bkginc, 1 ) |
---|
393 | CALL iom_get( inum, jpdom_autoglo, 'bckinv', v_bkginc, 1 ) |
---|
394 | ! Apply the masks |
---|
395 | u_bkginc(:,:,:) = u_bkginc(:,:,:) * umask(:,:,:) |
---|
396 | v_bkginc(:,:,:) = v_bkginc(:,:,:) * vmask(:,:,:) |
---|
397 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
398 | ! to allow for differences in masks |
---|
399 | WHERE( ABS( u_bkginc(:,:,:) ) > 1.0e+10 ) u_bkginc(:,:,:) = 0.0 |
---|
400 | WHERE( ABS( v_bkginc(:,:,:) ) > 1.0e+10 ) v_bkginc(:,:,:) = 0.0 |
---|
401 | ENDIF |
---|
402 | |
---|
403 | IF ( ln_sshinc ) THEN |
---|
404 | CALL iom_get( inum, jpdom_autoglo, 'bckineta', ssh_bkginc, 1 ) |
---|
405 | ! Apply the masks |
---|
406 | ssh_bkginc(:,:) = ssh_bkginc(:,:) * tmask(:,:,1) |
---|
407 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
408 | ! to allow for differences in masks |
---|
409 | WHERE( ABS( ssh_bkginc(:,:) ) > 1.0e+10 ) ssh_bkginc(:,:) = 0.0 |
---|
410 | ENDIF |
---|
411 | |
---|
412 | IF ( ln_seaiceinc ) THEN |
---|
413 | CALL iom_get( inum, jpdom_autoglo, 'bckinseaice', seaice_bkginc, 1 ) |
---|
414 | ! Apply the masks |
---|
415 | seaice_bkginc(:,:) = seaice_bkginc(:,:) * tmask(:,:,1) |
---|
416 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
417 | ! to allow for differences in masks |
---|
418 | WHERE( ABS( seaice_bkginc(:,:) ) > 1.0e+10 ) seaice_bkginc(:,:) = 0.0 |
---|
419 | ENDIF |
---|
420 | |
---|
421 | CALL iom_close( inum ) |
---|
422 | |
---|
423 | ENDIF |
---|
424 | |
---|
425 | !----------------------------------------------------------------------- |
---|
426 | ! Apply divergence damping filter |
---|
427 | !----------------------------------------------------------------------- |
---|
428 | |
---|
429 | IF ( ln_dyninc .AND. nn_divdmp > 0 ) THEN |
---|
430 | |
---|
431 | CALL wrk_alloc(jpi,jpj,hdiv) |
---|
432 | |
---|
433 | DO jt = 1, nn_divdmp |
---|
434 | |
---|
435 | DO jk = 1, jpkm1 |
---|
436 | |
---|
437 | hdiv(:,:) = 0._wp |
---|
438 | |
---|
439 | DO jj = 2, jpjm1 |
---|
440 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
441 | hdiv(ji,jj) = & |
---|
442 | ( e2u(ji ,jj ) * fse3u(ji ,jj ,jk) * u_bkginc(ji ,jj ,jk) & |
---|
443 | - e2u(ji-1,jj ) * fse3u(ji-1,jj ,jk) * u_bkginc(ji-1,jj ,jk) & |
---|
444 | + e1v(ji ,jj ) * fse3v(ji ,jj ,jk) * v_bkginc(ji ,jj ,jk) & |
---|
445 | - e1v(ji ,jj-1) * fse3v(ji ,jj-1,jk) * v_bkginc(ji ,jj-1,jk) ) & |
---|
446 | / ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) ) |
---|
447 | END DO |
---|
448 | END DO |
---|
449 | |
---|
450 | CALL lbc_lnk( hdiv, 'T', 1. ) ! lateral boundary cond. (no sign change) |
---|
451 | |
---|
452 | DO jj = 2, jpjm1 |
---|
453 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
454 | u_bkginc(ji,jj,jk) = u_bkginc(ji,jj,jk) + 0.2_wp * ( e1t(ji+1,jj)*e2t(ji+1,jj) * hdiv(ji+1,jj) & |
---|
455 | - e1t(ji ,jj)*e2t(ji ,jj) * hdiv(ji ,jj) ) & |
---|
456 | / e1u(ji,jj) * umask(ji,jj,jk) |
---|
457 | v_bkginc(ji,jj,jk) = v_bkginc(ji,jj,jk) + 0.2_wp * ( e1t(ji,jj+1)*e2t(ji,jj+1) * hdiv(ji,jj+1) & |
---|
458 | - e1t(ji,jj )*e2t(ji,jj ) * hdiv(ji,jj ) ) & |
---|
459 | / e2v(ji,jj) * vmask(ji,jj,jk) |
---|
460 | END DO |
---|
461 | END DO |
---|
462 | |
---|
463 | END DO |
---|
464 | |
---|
465 | END DO |
---|
466 | |
---|
467 | CALL wrk_dealloc(jpi,jpj,hdiv) |
---|
468 | |
---|
469 | ENDIF |
---|
470 | |
---|
471 | |
---|
472 | |
---|
473 | !----------------------------------------------------------------------- |
---|
474 | ! Allocate and initialize the background state arrays |
---|
475 | !----------------------------------------------------------------------- |
---|
476 | |
---|
477 | IF ( ln_asmdin ) THEN |
---|
478 | |
---|
479 | ALLOCATE( t_bkg(jpi,jpj,jpk) ) |
---|
480 | ALLOCATE( s_bkg(jpi,jpj,jpk) ) |
---|
481 | ALLOCATE( u_bkg(jpi,jpj,jpk) ) |
---|
482 | ALLOCATE( v_bkg(jpi,jpj,jpk) ) |
---|
483 | ALLOCATE( ssh_bkg(jpi,jpj) ) |
---|
484 | |
---|
485 | t_bkg(:,:,:) = 0.0 |
---|
486 | s_bkg(:,:,:) = 0.0 |
---|
487 | u_bkg(:,:,:) = 0.0 |
---|
488 | v_bkg(:,:,:) = 0.0 |
---|
489 | ssh_bkg(:,:) = 0.0 |
---|
490 | |
---|
491 | !-------------------------------------------------------------------- |
---|
492 | ! Read from file the background state at analysis time |
---|
493 | !-------------------------------------------------------------------- |
---|
494 | |
---|
495 | CALL iom_open( c_asmdin, inum ) |
---|
496 | |
---|
497 | CALL iom_get( inum, 'rdastp', zdate_bkg ) |
---|
498 | |
---|
499 | IF(lwp) THEN |
---|
500 | WRITE(numout,*) |
---|
501 | WRITE(numout,*) 'asm_inc_init : Assimilation background state valid at : ', & |
---|
502 | & NINT( zdate_bkg ) |
---|
503 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
504 | ENDIF |
---|
505 | |
---|
506 | IF ( NINT( zdate_bkg ) /= iitdin_date ) & |
---|
507 | & CALL ctl_warn( ' Validity time of assimilation background state does', & |
---|
508 | & ' not agree with Direct Initialization time' ) |
---|
509 | |
---|
510 | IF ( ln_trainc ) THEN |
---|
511 | CALL iom_get( inum, jpdom_autoglo, 'tn', t_bkg ) |
---|
512 | CALL iom_get( inum, jpdom_autoglo, 'sn', s_bkg ) |
---|
513 | t_bkg(:,:,:) = t_bkg(:,:,:) * tmask(:,:,:) |
---|
514 | s_bkg(:,:,:) = s_bkg(:,:,:) * tmask(:,:,:) |
---|
515 | ENDIF |
---|
516 | |
---|
517 | IF ( ln_dyninc ) THEN |
---|
518 | CALL iom_get( inum, jpdom_autoglo, 'un', u_bkg ) |
---|
519 | CALL iom_get( inum, jpdom_autoglo, 'vn', v_bkg ) |
---|
520 | u_bkg(:,:,:) = u_bkg(:,:,:) * umask(:,:,:) |
---|
521 | v_bkg(:,:,:) = v_bkg(:,:,:) * vmask(:,:,:) |
---|
522 | ENDIF |
---|
523 | |
---|
524 | IF ( ln_sshinc ) THEN |
---|
525 | CALL iom_get( inum, jpdom_autoglo, 'sshn', ssh_bkg ) |
---|
526 | ssh_bkg(:,:) = ssh_bkg(:,:) * tmask(:,:,1) |
---|
527 | ENDIF |
---|
528 | |
---|
529 | CALL iom_close( inum ) |
---|
530 | |
---|
531 | ENDIF |
---|
532 | ! |
---|
533 | END SUBROUTINE asm_inc_init |
---|
534 | |
---|
535 | |
---|
536 | SUBROUTINE calc_date( kit000, kt, kdate0, kdate ) |
---|
537 | !!---------------------------------------------------------------------- |
---|
538 | !! *** ROUTINE calc_date *** |
---|
539 | !! |
---|
540 | !! ** Purpose : Compute the calendar date YYYYMMDD at a given time step. |
---|
541 | !! |
---|
542 | !! ** Method : Compute the calendar date YYYYMMDD at a given time step. |
---|
543 | !! |
---|
544 | !! ** Action : |
---|
545 | !!---------------------------------------------------------------------- |
---|
546 | INTEGER, INTENT(IN) :: kit000 ! Initial time step |
---|
547 | INTEGER, INTENT(IN) :: kt ! Current time step referenced to kit000 |
---|
548 | INTEGER, INTENT(IN) :: kdate0 ! Initial date |
---|
549 | INTEGER, INTENT(OUT) :: kdate ! Current date reference to kdate0 |
---|
550 | ! |
---|
551 | INTEGER :: iyea0 ! Initial year |
---|
552 | INTEGER :: imon0 ! Initial month |
---|
553 | INTEGER :: iday0 ! Initial day |
---|
554 | INTEGER :: iyea ! Current year |
---|
555 | INTEGER :: imon ! Current month |
---|
556 | INTEGER :: iday ! Current day |
---|
557 | INTEGER :: idaystp ! Number of days between initial and current date |
---|
558 | INTEGER :: idaycnt ! Day counter |
---|
559 | |
---|
560 | INTEGER, DIMENSION(12) :: imonth_len !: length in days of the months of the current year |
---|
561 | |
---|
562 | !----------------------------------------------------------------------- |
---|
563 | ! Compute the calendar date YYYYMMDD |
---|
564 | !----------------------------------------------------------------------- |
---|
565 | |
---|
566 | ! Initial date |
---|
567 | iyea0 = kdate0 / 10000 |
---|
568 | imon0 = ( kdate0 - ( iyea0 * 10000 ) ) / 100 |
---|
569 | iday0 = kdate0 - ( iyea0 * 10000 ) - ( imon0 * 100 ) |
---|
570 | |
---|
571 | ! Check that kt >= kit000 - 1 |
---|
572 | IF ( kt < kit000 - 1 ) CALL ctl_stop( ' kt must be >= kit000 - 1') |
---|
573 | |
---|
574 | ! If kt = kit000 - 1 then set the date to the restart date |
---|
575 | IF ( kt == kit000 - 1 ) THEN |
---|
576 | |
---|
577 | kdate = ndastp |
---|
578 | RETURN |
---|
579 | |
---|
580 | ENDIF |
---|
581 | |
---|
582 | ! Compute the number of days from the initial date |
---|
583 | idaystp = INT( REAL( kt - kit000 ) * rdt / 86400. ) |
---|
584 | |
---|
585 | iday = iday0 |
---|
586 | imon = imon0 |
---|
587 | iyea = iyea0 |
---|
588 | idaycnt = 0 |
---|
589 | |
---|
590 | CALL calc_month_len( iyea, imonth_len ) |
---|
591 | |
---|
592 | DO WHILE ( idaycnt < idaystp ) |
---|
593 | iday = iday + 1 |
---|
594 | IF ( iday > imonth_len(imon) ) THEN |
---|
595 | iday = 1 |
---|
596 | imon = imon + 1 |
---|
597 | ENDIF |
---|
598 | IF ( imon > 12 ) THEN |
---|
599 | imon = 1 |
---|
600 | iyea = iyea + 1 |
---|
601 | CALL calc_month_len( iyea, imonth_len ) ! update month lengths |
---|
602 | ENDIF |
---|
603 | idaycnt = idaycnt + 1 |
---|
604 | END DO |
---|
605 | ! |
---|
606 | kdate = iyea * 10000 + imon * 100 + iday |
---|
607 | ! |
---|
608 | END SUBROUTINE |
---|
609 | |
---|
610 | |
---|
611 | SUBROUTINE calc_month_len( iyear, imonth_len ) |
---|
612 | !!---------------------------------------------------------------------- |
---|
613 | !! *** ROUTINE calc_month_len *** |
---|
614 | !! |
---|
615 | !! ** Purpose : Compute the number of days in a months given a year. |
---|
616 | !! |
---|
617 | !! ** Method : |
---|
618 | !!---------------------------------------------------------------------- |
---|
619 | INTEGER, DIMENSION(12) :: imonth_len !: length in days of the months of the current year |
---|
620 | INTEGER :: iyear !: year |
---|
621 | !!---------------------------------------------------------------------- |
---|
622 | ! |
---|
623 | ! length of the month of the current year (from nleapy, read in namelist) |
---|
624 | IF ( nleapy < 2 ) THEN |
---|
625 | imonth_len(:) = (/ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 /) |
---|
626 | IF ( nleapy == 1 ) THEN ! we are using calendar with leap years |
---|
627 | IF ( MOD(iyear, 4) == 0 .AND. ( MOD(iyear, 400) == 0 .OR. MOD(iyear, 100) /= 0 ) ) THEN |
---|
628 | imonth_len(2) = 29 |
---|
629 | ENDIF |
---|
630 | ENDIF |
---|
631 | ELSE |
---|
632 | imonth_len(:) = nleapy ! all months with nleapy days per year |
---|
633 | ENDIF |
---|
634 | ! |
---|
635 | END SUBROUTINE |
---|
636 | |
---|
637 | |
---|
638 | SUBROUTINE tra_asm_inc( kt ) |
---|
639 | !!---------------------------------------------------------------------- |
---|
640 | !! *** ROUTINE tra_asm_inc *** |
---|
641 | !! |
---|
642 | !! ** Purpose : Apply the tracer (T and S) assimilation increments |
---|
643 | !! |
---|
644 | !! ** Method : Direct initialization or Incremental Analysis Updating |
---|
645 | !! |
---|
646 | !! ** Action : |
---|
647 | !!---------------------------------------------------------------------- |
---|
648 | INTEGER, INTENT(IN) :: kt ! Current time step |
---|
649 | ! |
---|
650 | INTEGER :: ji,jj,jk |
---|
651 | INTEGER :: it |
---|
652 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
653 | REAL (wp), DIMENSION(jpi,jpj,jpk) :: fzptnz ! 3d freezing point values |
---|
654 | !!---------------------------------------------------------------------- |
---|
655 | |
---|
656 | ! freezing point calculation taken from oc_fz_pt (but calculated for all depths) |
---|
657 | ! used to prevent the applied increments taking the temperature below the local freezing point |
---|
658 | |
---|
659 | DO jk = 1, jpkm1 |
---|
660 | CALL eos_fzp( tsn(:,:,jk,jp_sal), fzptnz(:,:,jk), fsdept(:,:,jk) ) |
---|
661 | END DO |
---|
662 | |
---|
663 | IF ( ln_asmiau ) THEN |
---|
664 | |
---|
665 | !-------------------------------------------------------------------- |
---|
666 | ! Incremental Analysis Updating |
---|
667 | !-------------------------------------------------------------------- |
---|
668 | |
---|
669 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
670 | |
---|
671 | it = kt - nit000 + 1 |
---|
672 | zincwgt = wgtiau(it) / rdt ! IAU weight for the current time step |
---|
673 | |
---|
674 | IF(lwp) THEN |
---|
675 | WRITE(numout,*) |
---|
676 | WRITE(numout,*) 'tra_asm_inc : Tracer IAU at time step = ', kt,' with IAU weight = ', wgtiau(it) |
---|
677 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
678 | ENDIF |
---|
679 | |
---|
680 | ! Update the tracer tendencies |
---|
681 | DO jk = 1, jpkm1 |
---|
682 | IF (ln_temnofreeze) THEN |
---|
683 | ! Do not apply negative increments if the temperature will fall below freezing |
---|
684 | WHERE(t_bkginc(:,:,jk) > 0.0_wp .OR. & |
---|
685 | & tsn(:,:,jk,jp_tem) + tsa(:,:,jk,jp_tem) + t_bkginc(:,:,jk) * wgtiau(it) > fzptnz(:,:,jk) ) |
---|
686 | tsa(:,:,jk,jp_tem) = tsa(:,:,jk,jp_tem) + t_bkginc(:,:,jk) * zincwgt |
---|
687 | END WHERE |
---|
688 | ELSE |
---|
689 | tsa(:,:,jk,jp_tem) = tsa(:,:,jk,jp_tem) + t_bkginc(:,:,jk) * zincwgt |
---|
690 | ENDIF |
---|
691 | IF (ln_salfix) THEN |
---|
692 | ! Do not apply negative increments if the salinity will fall below a specified |
---|
693 | ! minimum value salfixmin |
---|
694 | WHERE(s_bkginc(:,:,jk) > 0.0_wp .OR. & |
---|
695 | & tsn(:,:,jk,jp_sal) + tsa(:,:,jk,jp_sal) + s_bkginc(:,:,jk) * wgtiau(it) > salfixmin ) |
---|
696 | tsa(:,:,jk,jp_sal) = tsa(:,:,jk,jp_sal) + s_bkginc(:,:,jk) * zincwgt |
---|
697 | END WHERE |
---|
698 | ELSE |
---|
699 | tsa(:,:,jk,jp_sal) = tsa(:,:,jk,jp_sal) + s_bkginc(:,:,jk) * zincwgt |
---|
700 | ENDIF |
---|
701 | END DO |
---|
702 | |
---|
703 | ENDIF |
---|
704 | |
---|
705 | IF ( kt == nitiaufin_r + 1 ) THEN ! For bias crcn to work |
---|
706 | DEALLOCATE( t_bkginc ) |
---|
707 | DEALLOCATE( s_bkginc ) |
---|
708 | ENDIF |
---|
709 | |
---|
710 | |
---|
711 | ELSEIF ( ln_asmdin ) THEN |
---|
712 | |
---|
713 | !-------------------------------------------------------------------- |
---|
714 | ! Direct Initialization |
---|
715 | !-------------------------------------------------------------------- |
---|
716 | |
---|
717 | IF ( kt == nitdin_r ) THEN |
---|
718 | |
---|
719 | neuler = 0 ! Force Euler forward step |
---|
720 | |
---|
721 | ! Initialize the now fields with the background + increment |
---|
722 | IF (ln_temnofreeze) THEN |
---|
723 | ! Do not apply negative increments if the temperature will fall below freezing |
---|
724 | WHERE( t_bkginc(:,:,:) > 0.0_wp .OR. tsn(:,:,:,jp_tem) + t_bkginc(:,:,:) > fzptnz(:,:,:) ) |
---|
725 | tsn(:,:,:,jp_tem) = t_bkg(:,:,:) + t_bkginc(:,:,:) |
---|
726 | END WHERE |
---|
727 | ELSE |
---|
728 | tsn(:,:,:,jp_tem) = t_bkg(:,:,:) + t_bkginc(:,:,:) |
---|
729 | ENDIF |
---|
730 | IF (ln_salfix) THEN |
---|
731 | ! Do not apply negative increments if the salinity will fall below a specified |
---|
732 | ! minimum value salfixmin |
---|
733 | WHERE( s_bkginc(:,:,:) > 0.0_wp .OR. tsn(:,:,:,jp_sal) + s_bkginc(:,:,:) > salfixmin ) |
---|
734 | tsn(:,:,:,jp_sal) = s_bkg(:,:,:) + s_bkginc(:,:,:) |
---|
735 | END WHERE |
---|
736 | ELSE |
---|
737 | tsn(:,:,:,jp_sal) = s_bkg(:,:,:) + s_bkginc(:,:,:) |
---|
738 | ENDIF |
---|
739 | |
---|
740 | tsb(:,:,:,:) = tsn(:,:,:,:) ! Update before fields |
---|
741 | |
---|
742 | CALL eos( tsb, rhd, rhop, gdept_0(:,:,:) ) ! Before potential and in situ densities |
---|
743 | !!gm fabien |
---|
744 | ! CALL eos( tsb, rhd, rhop ) ! Before potential and in situ densities |
---|
745 | !!gm |
---|
746 | |
---|
747 | |
---|
748 | IF( ln_zps .AND. .NOT. lk_c1d .AND. .NOT. ln_isfcav) & |
---|
749 | & CALL zps_hde ( kt, jpts, tsb, gtsu, gtsv, & ! Partial steps: before horizontal gradient |
---|
750 | & rhd, gru , grv ) ! of t, s, rd at the last ocean level |
---|
751 | IF( ln_zps .AND. .NOT. lk_c1d .AND. ln_isfcav) & |
---|
752 | & CALL zps_hde_isf( nit000, jpts, tsb, gtsu, gtsv, & ! Partial steps for top cell (ISF) |
---|
753 | & rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , & |
---|
754 | & gtui, gtvi, grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi ) ! of t, s, rd at the last ocean level |
---|
755 | |
---|
756 | #if defined key_zdfkpp |
---|
757 | CALL eos( tsn, rhd, fsdept_n(:,:,:) ) ! Compute rhd |
---|
758 | !!gm fabien CALL eos( tsn, rhd ) ! Compute rhd |
---|
759 | #endif |
---|
760 | |
---|
761 | DEALLOCATE( t_bkginc ) |
---|
762 | DEALLOCATE( s_bkginc ) |
---|
763 | DEALLOCATE( t_bkg ) |
---|
764 | DEALLOCATE( s_bkg ) |
---|
765 | ENDIF |
---|
766 | ! |
---|
767 | ENDIF |
---|
768 | ! |
---|
769 | END SUBROUTINE tra_asm_inc |
---|
770 | |
---|
771 | |
---|
772 | SUBROUTINE dyn_asm_inc( kt ) |
---|
773 | !!---------------------------------------------------------------------- |
---|
774 | !! *** ROUTINE dyn_asm_inc *** |
---|
775 | !! |
---|
776 | !! ** Purpose : Apply the dynamics (u and v) assimilation increments. |
---|
777 | !! |
---|
778 | !! ** Method : Direct initialization or Incremental Analysis Updating. |
---|
779 | !! |
---|
780 | !! ** Action : |
---|
781 | !!---------------------------------------------------------------------- |
---|
782 | INTEGER, INTENT(IN) :: kt ! Current time step |
---|
783 | ! |
---|
784 | INTEGER :: jk |
---|
785 | INTEGER :: it |
---|
786 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
787 | !!---------------------------------------------------------------------- |
---|
788 | |
---|
789 | IF ( ln_asmiau ) THEN |
---|
790 | |
---|
791 | !-------------------------------------------------------------------- |
---|
792 | ! Incremental Analysis Updating |
---|
793 | !-------------------------------------------------------------------- |
---|
794 | |
---|
795 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
796 | |
---|
797 | it = kt - nit000 + 1 |
---|
798 | zincwgt = wgtiau(it) / rdt ! IAU weight for the current time step |
---|
799 | |
---|
800 | IF(lwp) THEN |
---|
801 | WRITE(numout,*) |
---|
802 | WRITE(numout,*) 'dyn_asm_inc : Dynamics IAU at time step = ', & |
---|
803 | & kt,' with IAU weight = ', wgtiau(it) |
---|
804 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
805 | ENDIF |
---|
806 | |
---|
807 | ! Update the dynamic tendencies |
---|
808 | DO jk = 1, jpkm1 |
---|
809 | ua(:,:,jk) = ua(:,:,jk) + u_bkginc(:,:,jk) * zincwgt |
---|
810 | va(:,:,jk) = va(:,:,jk) + v_bkginc(:,:,jk) * zincwgt |
---|
811 | END DO |
---|
812 | |
---|
813 | IF ( kt == nitiaufin_r ) THEN |
---|
814 | DEALLOCATE( u_bkginc ) |
---|
815 | DEALLOCATE( v_bkginc ) |
---|
816 | ENDIF |
---|
817 | |
---|
818 | ENDIF |
---|
819 | |
---|
820 | ELSEIF ( ln_asmdin ) THEN |
---|
821 | |
---|
822 | !-------------------------------------------------------------------- |
---|
823 | ! Direct Initialization |
---|
824 | !-------------------------------------------------------------------- |
---|
825 | |
---|
826 | IF ( kt == nitdin_r ) THEN |
---|
827 | |
---|
828 | neuler = 0 ! Force Euler forward step |
---|
829 | |
---|
830 | ! Initialize the now fields with the background + increment |
---|
831 | un(:,:,:) = u_bkg(:,:,:) + u_bkginc(:,:,:) |
---|
832 | vn(:,:,:) = v_bkg(:,:,:) + v_bkginc(:,:,:) |
---|
833 | |
---|
834 | ub(:,:,:) = un(:,:,:) ! Update before fields |
---|
835 | vb(:,:,:) = vn(:,:,:) |
---|
836 | |
---|
837 | DEALLOCATE( u_bkg ) |
---|
838 | DEALLOCATE( v_bkg ) |
---|
839 | DEALLOCATE( u_bkginc ) |
---|
840 | DEALLOCATE( v_bkginc ) |
---|
841 | ENDIF |
---|
842 | ! |
---|
843 | ENDIF |
---|
844 | ! |
---|
845 | END SUBROUTINE dyn_asm_inc |
---|
846 | |
---|
847 | |
---|
848 | SUBROUTINE ssh_asm_inc( kt ) |
---|
849 | !!---------------------------------------------------------------------- |
---|
850 | !! *** ROUTINE ssh_asm_inc *** |
---|
851 | !! |
---|
852 | !! ** Purpose : Apply the sea surface height assimilation increment. |
---|
853 | !! |
---|
854 | !! ** Method : Direct initialization or Incremental Analysis Updating. |
---|
855 | !! |
---|
856 | !! ** Action : |
---|
857 | !!---------------------------------------------------------------------- |
---|
858 | INTEGER, INTENT(IN) :: kt ! Current time step |
---|
859 | ! |
---|
860 | INTEGER :: it |
---|
861 | INTEGER :: jk |
---|
862 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
863 | !!---------------------------------------------------------------------- |
---|
864 | |
---|
865 | IF ( ln_asmiau ) THEN |
---|
866 | |
---|
867 | !-------------------------------------------------------------------- |
---|
868 | ! Incremental Analysis Updating |
---|
869 | !-------------------------------------------------------------------- |
---|
870 | |
---|
871 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
872 | |
---|
873 | it = kt - nit000 + 1 |
---|
874 | zincwgt = wgtiau(it) / rdt ! IAU weight for the current time step |
---|
875 | |
---|
876 | IF(lwp) THEN |
---|
877 | WRITE(numout,*) |
---|
878 | WRITE(numout,*) 'ssh_asm_inc : SSH IAU at time step = ', & |
---|
879 | & kt,' with IAU weight = ', wgtiau(it) |
---|
880 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
881 | ENDIF |
---|
882 | |
---|
883 | ! Save the tendency associated with the IAU weighted SSH increment |
---|
884 | ! (applied in dynspg.*) |
---|
885 | #if defined key_asminc |
---|
886 | ssh_iau(:,:) = ssh_bkginc(:,:) * zincwgt |
---|
887 | #endif |
---|
888 | IF ( kt == nitiaufin_r ) THEN |
---|
889 | DEALLOCATE( ssh_bkginc ) |
---|
890 | ENDIF |
---|
891 | |
---|
892 | ENDIF |
---|
893 | |
---|
894 | ELSEIF ( ln_asmdin ) THEN |
---|
895 | |
---|
896 | !-------------------------------------------------------------------- |
---|
897 | ! Direct Initialization |
---|
898 | !-------------------------------------------------------------------- |
---|
899 | |
---|
900 | IF ( kt == nitdin_r ) THEN |
---|
901 | |
---|
902 | neuler = 0 ! Force Euler forward step |
---|
903 | |
---|
904 | ! Initialize the now fields the background + increment |
---|
905 | sshn(:,:) = ssh_bkg(:,:) + ssh_bkginc(:,:) |
---|
906 | |
---|
907 | ! Update before fields |
---|
908 | sshb(:,:) = sshn(:,:) |
---|
909 | |
---|
910 | IF( lk_vvl ) THEN |
---|
911 | DO jk = 1, jpk |
---|
912 | fse3t_b(:,:,jk) = fse3t_n(:,:,jk) |
---|
913 | END DO |
---|
914 | ENDIF |
---|
915 | |
---|
916 | DEALLOCATE( ssh_bkg ) |
---|
917 | DEALLOCATE( ssh_bkginc ) |
---|
918 | |
---|
919 | ENDIF |
---|
920 | ! |
---|
921 | ENDIF |
---|
922 | ! |
---|
923 | END SUBROUTINE ssh_asm_inc |
---|
924 | |
---|
925 | |
---|
926 | SUBROUTINE seaice_asm_inc( kt, kindic ) |
---|
927 | !!---------------------------------------------------------------------- |
---|
928 | !! *** ROUTINE seaice_asm_inc *** |
---|
929 | !! |
---|
930 | !! ** Purpose : Apply the sea ice assimilation increment. |
---|
931 | !! |
---|
932 | !! ** Method : Direct initialization or Incremental Analysis Updating. |
---|
933 | !! |
---|
934 | !! ** Action : |
---|
935 | !! |
---|
936 | !!---------------------------------------------------------------------- |
---|
937 | IMPLICIT NONE |
---|
938 | ! |
---|
939 | INTEGER, INTENT(in) :: kt ! Current time step |
---|
940 | INTEGER, INTENT(in), OPTIONAL :: kindic ! flag for disabling the deallocation |
---|
941 | ! |
---|
942 | INTEGER :: it |
---|
943 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
944 | #if defined key_lim2 |
---|
945 | REAL(wp), DIMENSION(jpi,jpj) :: zofrld, zohicif, zseaicendg, zhicifinc ! LIM |
---|
946 | REAL(wp) :: zhicifmin = 0.5_wp ! ice minimum depth in metres |
---|
947 | #endif |
---|
948 | !!---------------------------------------------------------------------- |
---|
949 | |
---|
950 | IF ( ln_asmiau ) THEN |
---|
951 | |
---|
952 | !-------------------------------------------------------------------- |
---|
953 | ! Incremental Analysis Updating |
---|
954 | !-------------------------------------------------------------------- |
---|
955 | |
---|
956 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
957 | |
---|
958 | it = kt - nit000 + 1 |
---|
959 | zincwgt = wgtiau(it) ! IAU weight for the current time step |
---|
960 | ! note this is not a tendency so should not be divided by rdt (as with the tracer and other increments) |
---|
961 | |
---|
962 | IF(lwp) THEN |
---|
963 | WRITE(numout,*) |
---|
964 | WRITE(numout,*) 'seaice_asm_inc : sea ice conc IAU at time step = ', & |
---|
965 | & kt,' with IAU weight = ', wgtiau(it) |
---|
966 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
967 | ENDIF |
---|
968 | |
---|
969 | ! Sea-ice : LIM-3 case (to add) |
---|
970 | |
---|
971 | #if defined key_lim2 |
---|
972 | ! Sea-ice : LIM-2 case |
---|
973 | zofrld (:,:) = frld(:,:) |
---|
974 | zohicif(:,:) = hicif(:,:) |
---|
975 | ! |
---|
976 | frld = MIN( MAX( frld (:,:) - seaice_bkginc(:,:) * zincwgt, 0.0_wp), 1.0_wp) |
---|
977 | pfrld = MIN( MAX( pfrld(:,:) - seaice_bkginc(:,:) * zincwgt, 0.0_wp), 1.0_wp) |
---|
978 | fr_i(:,:) = 1.0_wp - frld(:,:) ! adjust ice fraction |
---|
979 | ! |
---|
980 | zseaicendg(:,:) = zofrld(:,:) - frld(:,:) ! find out actual sea ice nudge applied |
---|
981 | ! |
---|
982 | ! Nudge sea ice depth to bring it up to a required minimum depth |
---|
983 | WHERE( zseaicendg(:,:) > 0.0_wp .AND. hicif(:,:) < zhicifmin ) |
---|
984 | zhicifinc(:,:) = (zhicifmin - hicif(:,:)) * zincwgt |
---|
985 | ELSEWHERE |
---|
986 | zhicifinc(:,:) = 0.0_wp |
---|
987 | END WHERE |
---|
988 | ! |
---|
989 | ! nudge ice depth |
---|
990 | hicif (:,:) = hicif (:,:) + zhicifinc(:,:) |
---|
991 | phicif(:,:) = phicif(:,:) + zhicifinc(:,:) |
---|
992 | ! |
---|
993 | ! seaice salinity balancing (to add) |
---|
994 | #endif |
---|
995 | |
---|
996 | #if defined key_cice && defined key_asminc |
---|
997 | ! Sea-ice : CICE case. Pass ice increment tendency into CICE |
---|
998 | ndaice_da(:,:) = seaice_bkginc(:,:) * zincwgt / rdt |
---|
999 | #endif |
---|
1000 | |
---|
1001 | IF ( kt == nitiaufin_r ) THEN |
---|
1002 | DEALLOCATE( seaice_bkginc ) |
---|
1003 | ENDIF |
---|
1004 | |
---|
1005 | ELSE |
---|
1006 | |
---|
1007 | #if defined key_cice && defined key_asminc |
---|
1008 | ! Sea-ice : CICE case. Zero ice increment tendency into CICE |
---|
1009 | ndaice_da(:,:) = 0.0_wp |
---|
1010 | #endif |
---|
1011 | |
---|
1012 | ENDIF |
---|
1013 | |
---|
1014 | ELSEIF ( ln_asmdin ) THEN |
---|
1015 | |
---|
1016 | !-------------------------------------------------------------------- |
---|
1017 | ! Direct Initialization |
---|
1018 | !-------------------------------------------------------------------- |
---|
1019 | |
---|
1020 | IF ( kt == nitdin_r ) THEN |
---|
1021 | |
---|
1022 | neuler = 0 ! Force Euler forward step |
---|
1023 | |
---|
1024 | ! Sea-ice : LIM-3 case (to add) |
---|
1025 | |
---|
1026 | #if defined key_lim2 |
---|
1027 | ! Sea-ice : LIM-2 case. |
---|
1028 | zofrld(:,:)=frld(:,:) |
---|
1029 | zohicif(:,:)=hicif(:,:) |
---|
1030 | ! |
---|
1031 | ! Initialize the now fields the background + increment |
---|
1032 | frld (:,:) = MIN( MAX( frld(:,:) - seaice_bkginc(:,:), 0.0_wp), 1.0_wp) |
---|
1033 | pfrld(:,:) = frld(:,:) |
---|
1034 | fr_i (:,:) = 1.0_wp - frld(:,:) ! adjust ice fraction |
---|
1035 | zseaicendg(:,:) = zofrld(:,:) - frld(:,:) ! find out actual sea ice nudge applied |
---|
1036 | ! |
---|
1037 | ! Nudge sea ice depth to bring it up to a required minimum depth |
---|
1038 | WHERE( zseaicendg(:,:) > 0.0_wp .AND. hicif(:,:) < zhicifmin ) |
---|
1039 | zhicifinc(:,:) = (zhicifmin - hicif(:,:)) * zincwgt |
---|
1040 | ELSEWHERE |
---|
1041 | zhicifinc(:,:) = 0.0_wp |
---|
1042 | END WHERE |
---|
1043 | ! |
---|
1044 | ! nudge ice depth |
---|
1045 | hicif (:,:) = hicif (:,:) + zhicifinc(:,:) |
---|
1046 | phicif(:,:) = phicif(:,:) |
---|
1047 | ! |
---|
1048 | ! seaice salinity balancing (to add) |
---|
1049 | #endif |
---|
1050 | |
---|
1051 | #if defined key_cice && defined key_asminc |
---|
1052 | ! Sea-ice : CICE case. Pass ice increment tendency into CICE |
---|
1053 | ndaice_da(:,:) = seaice_bkginc(:,:) / rdt |
---|
1054 | #endif |
---|
1055 | IF ( .NOT. PRESENT(kindic) ) THEN |
---|
1056 | DEALLOCATE( seaice_bkginc ) |
---|
1057 | END IF |
---|
1058 | |
---|
1059 | ELSE |
---|
1060 | |
---|
1061 | #if defined key_cice && defined key_asminc |
---|
1062 | ! Sea-ice : CICE case. Zero ice increment tendency into CICE |
---|
1063 | ndaice_da(:,:) = 0.0_wp |
---|
1064 | #endif |
---|
1065 | |
---|
1066 | ENDIF |
---|
1067 | |
---|
1068 | !#if defined defined key_lim2 || defined key_cice |
---|
1069 | ! |
---|
1070 | ! IF (ln_seaicebal ) THEN |
---|
1071 | ! !! balancing salinity increments |
---|
1072 | ! !! simple case from limflx.F90 (doesn't include a mass flux) |
---|
1073 | ! !! assumption is that as ice concentration is reduced or increased |
---|
1074 | ! !! the snow and ice depths remain constant |
---|
1075 | ! !! note that snow is being created where ice concentration is being increased |
---|
1076 | ! !! - could be more sophisticated and |
---|
1077 | ! !! not do this (but would need to alter h_snow) |
---|
1078 | ! |
---|
1079 | ! usave(:,:,:)=sb(:,:,:) ! use array as a temporary store |
---|
1080 | ! |
---|
1081 | ! DO jj = 1, jpj |
---|
1082 | ! DO ji = 1, jpi |
---|
1083 | ! ! calculate change in ice and snow mass per unit area |
---|
1084 | ! ! positive values imply adding salt to the ocean (results from ice formation) |
---|
1085 | ! ! fwf : ice formation and melting |
---|
1086 | ! |
---|
1087 | ! zfons = ( -nfresh_da(ji,jj)*soce + nfsalt_da(ji,jj) )*rdt |
---|
1088 | ! |
---|
1089 | ! ! change salinity down to mixed layer depth |
---|
1090 | ! mld=hmld_kara(ji,jj) |
---|
1091 | ! |
---|
1092 | ! ! prevent small mld |
---|
1093 | ! ! less than 10m can cause salinity instability |
---|
1094 | ! IF (mld < 10) mld=10 |
---|
1095 | ! |
---|
1096 | ! ! set to bottom of a level |
---|
1097 | ! DO jk = jpk-1, 2, -1 |
---|
1098 | ! IF ((mld > gdepw(ji,jj,jk)) .and. (mld < gdepw(ji,jj,jk+1))) THEN |
---|
1099 | ! mld=gdepw(ji,jj,jk+1) |
---|
1100 | ! jkmax=jk |
---|
1101 | ! ENDIF |
---|
1102 | ! ENDDO |
---|
1103 | ! |
---|
1104 | ! ! avoid applying salinity balancing in shallow water or on land |
---|
1105 | ! ! |
---|
1106 | ! |
---|
1107 | ! ! dsal_ocn (psu kg m^-2) / (kg m^-3 * m) |
---|
1108 | ! |
---|
1109 | ! dsal_ocn=0.0_wp |
---|
1110 | ! sal_thresh=5.0_wp ! minimum salinity threshold for salinity balancing |
---|
1111 | ! |
---|
1112 | ! if (tmask(ji,jj,1) > 0 .AND. tmask(ji,jj,jkmax) > 0 ) & |
---|
1113 | ! dsal_ocn = zfons / (rhop(ji,jj,1) * mld) |
---|
1114 | ! |
---|
1115 | ! ! put increments in for levels in the mixed layer |
---|
1116 | ! ! but prevent salinity below a threshold value |
---|
1117 | ! |
---|
1118 | ! DO jk = 1, jkmax |
---|
1119 | ! |
---|
1120 | ! IF (dsal_ocn > 0.0_wp .or. sb(ji,jj,jk)+dsal_ocn > sal_thresh) THEN |
---|
1121 | ! sb(ji,jj,jk) = sb(ji,jj,jk) + dsal_ocn |
---|
1122 | ! sn(ji,jj,jk) = sn(ji,jj,jk) + dsal_ocn |
---|
1123 | ! ENDIF |
---|
1124 | ! |
---|
1125 | ! ENDDO |
---|
1126 | ! |
---|
1127 | ! ! ! salt exchanges at the ice/ocean interface |
---|
1128 | ! ! zpmess = zfons / rdt_ice ! rdt_ice is ice timestep |
---|
1129 | ! ! |
---|
1130 | ! !! Adjust fsalt. A +ve fsalt means adding salt to ocean |
---|
1131 | ! !! fsalt(ji,jj) = fsalt(ji,jj) + zpmess ! adjust fsalt |
---|
1132 | ! !! |
---|
1133 | ! !! emps(ji,jj) = emps(ji,jj) + zpmess ! or adjust emps (see icestp1d) |
---|
1134 | ! !! ! E-P (kg m-2 s-2) |
---|
1135 | ! ! emp(ji,jj) = emp(ji,jj) + zpmess ! E-P (kg m-2 s-2) |
---|
1136 | ! ENDDO !ji |
---|
1137 | ! ENDDO !jj! |
---|
1138 | ! |
---|
1139 | ! ENDIF !ln_seaicebal |
---|
1140 | ! |
---|
1141 | !#endif |
---|
1142 | |
---|
1143 | ENDIF |
---|
1144 | |
---|
1145 | END SUBROUTINE seaice_asm_inc |
---|
1146 | |
---|
1147 | !!====================================================================== |
---|
1148 | END MODULE asminc |
---|