1 | MODULE compute_geopot_mod |
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2 | USE prec, ONLY : rstd |
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3 | USE grid_param |
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4 | USE earth_const |
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5 | USE disvert_mod |
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6 | USE omp_para |
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7 | USE trace |
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8 | IMPLICIT NONE |
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9 | PRIVATE |
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10 | SAVE |
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11 | |
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12 | PUBLIC :: compute_geopot_hex, compute_geopot_manual |
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13 | |
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14 | CONTAINS |
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15 | |
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16 | !**************************** Geopotential ***************************** |
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17 | |
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18 | SUBROUTINE compute_geopot_hex(rhodz,theta, ps,pk,geopot) |
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19 | REAL(rstd),INTENT(IN) :: rhodz(iim*jjm,llm) |
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20 | REAL(rstd),INTENT(IN) :: theta(iim*jjm,llm,nqdyn) ! active scalars : theta/entropy, moisture, ... |
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21 | REAL(rstd),INTENT(INOUT) :: ps(iim*jjm) |
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22 | REAL(rstd),INTENT(OUT) :: pk(iim*jjm,llm) ! Exner function (compressible) /Lagrange multiplier (Boussinesq) |
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23 | REAL(rstd),INTENT(INOUT) :: geopot(iim*jjm,llm+1) ! geopotential |
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24 | |
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25 | INTEGER :: i,j,ij,l |
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26 | REAL(rstd) :: p_ik, exner_ik, Cp_ik, temp_ik, qv, chi, Rmix, gv |
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27 | INTEGER :: ij_omp_begin_ext, ij_omp_end_ext |
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28 | |
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29 | CALL trace_start("compute_geopot") |
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30 | !$OMP BARRIER |
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31 | CALL distrib_level(ij_begin_ext,ij_end_ext, ij_omp_begin_ext,ij_omp_end_ext) |
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32 | #include "../kernels_hex/compute_geopot.k90" |
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33 | !$OMP BARRIER |
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34 | |
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35 | CALL trace_end("compute_geopot") |
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36 | END SUBROUTINE compute_geopot_hex |
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37 | |
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38 | SUBROUTINE compute_geopot_manual(rhodz,theta, ps,pk,geopot) |
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39 | REAL(rstd),INTENT(IN) :: rhodz(iim*jjm,llm) |
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40 | REAL(rstd),INTENT(IN) :: theta(iim*jjm,llm,nqdyn) ! active scalars : theta/entropy, moisture, ... |
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41 | REAL(rstd),INTENT(INOUT) :: ps(iim*jjm) |
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42 | REAL(rstd),INTENT(OUT) :: pk(iim*jjm,llm) ! Exner function (compressible) /Lagrange multiplier (Boussinesq) |
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43 | REAL(rstd),INTENT(INOUT) :: geopot(iim*jjm,llm+1) ! geopotential |
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44 | |
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45 | INTEGER :: i,j,ij,l |
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46 | REAL(rstd) :: p_ik, exner_ik, Cp_ik, temp_ik, qv, chi, Rmix, gv |
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47 | INTEGER :: ij_omp_begin_ext, ij_omp_end_ext |
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48 | |
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49 | CALL trace_start("compute_geopot") |
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50 | |
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51 | !$OMP BARRIER |
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52 | |
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53 | CALL distrib_level(ij_begin_ext,ij_end_ext, ij_omp_begin_ext,ij_omp_end_ext) |
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54 | |
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55 | ! Pressure is computed first top-down (temporarily stored in pk) |
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56 | ! Then Exner pressure and geopotential are computed bottom-up |
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57 | ! Works also when caldyn_eta=eta_mass |
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58 | |
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59 | IF(boussinesq) THEN ! compute geopotential and pk=Lagrange multiplier |
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60 | ! specific volume 1 = dphi/g/rhodz |
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61 | ! IF (is_omp_level_master) THEN ! no openMP on vertical due to dependency |
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62 | DO l = 1,llm |
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63 | !DIR$ SIMD |
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64 | DO ij=ij_omp_begin_ext,ij_omp_end_ext |
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65 | geopot(ij,l+1) = geopot(ij,l) + g*rhodz(ij,l) |
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66 | ENDDO |
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67 | ENDDO |
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68 | ! use hydrostatic balance with theta*rhodz to find pk (Lagrange multiplier=pressure) |
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69 | ! uppermost layer |
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70 | !DIR$ SIMD |
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71 | DO ij=ij_begin_ext,ij_end_ext |
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72 | pk(ij,llm) = ptop + (.5*g)*theta(ij,llm,1)*rhodz(ij,llm) |
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73 | END DO |
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74 | ! other layers |
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75 | DO l = llm-1, 1, -1 |
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76 | ! !$OMP DO SCHEDULE(STATIC) |
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77 | !DIR$ SIMD |
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78 | DO ij=ij_begin_ext,ij_end_ext |
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79 | pk(ij,l) = pk(ij,l+1) + (.5*g)*(theta(ij,l,1)*rhodz(ij,l)+theta(ij,l+1,1)*rhodz(ij,l+1)) |
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80 | END DO |
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81 | END DO |
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82 | ! now pk contains the Lagrange multiplier (pressure) |
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83 | ELSE ! non-Boussinesq, compute pressure, Exner pressure or temperature, then geopotential |
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84 | ! uppermost layer |
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85 | |
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86 | SELECT CASE(caldyn_thermo) |
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87 | CASE(thermo_theta, thermo_entropy) |
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88 | !DIR$ SIMD |
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89 | DO ij=ij_omp_begin_ext,ij_omp_end_ext |
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90 | pk(ij,llm) = ptop + (.5*g)*rhodz(ij,llm) |
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91 | END DO |
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92 | ! other layers |
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93 | DO l = llm-1, 1, -1 |
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94 | !DIR$ SIMD |
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95 | DO ij=ij_omp_begin_ext,ij_omp_end_ext |
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96 | pk(ij,l) = pk(ij,l+1) + (.5*g)*(rhodz(ij,l)+rhodz(ij,l+1)) |
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97 | END DO |
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98 | END DO |
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99 | ! surface pressure (for diagnostics) |
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100 | IF(caldyn_eta==eta_lag) THEN |
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101 | DO ij=ij_omp_begin_ext,ij_omp_end_ext |
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102 | ps(ij) = pk(ij,1) + (.5*g)*rhodz(ij,1) |
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103 | END DO |
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104 | END IF |
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105 | CASE(thermo_moist) ! theta(ij,l,2) = qv = mv/md |
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106 | !DIR$ SIMD |
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107 | DO ij=ij_omp_begin_ext,ij_omp_end_ext |
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108 | pk(ij,llm) = ptop + (.5*g)*rhodz(ij,llm)*(1.+theta(ij,l,2)) |
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109 | END DO |
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110 | ! other layers |
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111 | DO l = llm-1, 1, -1 |
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112 | !DIR$ SIMD |
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113 | DO ij=ij_omp_begin_ext,ij_omp_end_ext |
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114 | pk(ij,l) = pk(ij,l+1) + (.5*g)*( & |
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115 | rhodz(ij,l) *(1.+theta(ij,l,2)) + & |
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116 | rhodz(ij,l+1)*(1.+theta(ij,l+1,2)) ) |
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117 | END DO |
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118 | END DO |
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119 | ! surface pressure (for diagnostics) |
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120 | IF(caldyn_eta==eta_lag) THEN |
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121 | DO ij=ij_omp_begin_ext,ij_omp_end_ext |
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122 | ps(ij) = pk(ij,1) + (.5*g)*rhodz(ij,1)*(1.+theta(ij,l,2)) |
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123 | END DO |
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124 | END IF |
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125 | END SELECT |
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126 | |
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127 | DO l = 1,llm |
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128 | SELECT CASE(caldyn_thermo) |
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129 | CASE(thermo_theta) |
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130 | !DIR$ SIMD |
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131 | DO ij=ij_omp_begin_ext,ij_omp_end_ext |
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132 | p_ik = pk(ij,l) |
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133 | exner_ik = cpp * (p_ik/preff) ** kappa |
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134 | pk(ij,l) = exner_ik |
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135 | ! specific volume v = kappa*theta*pi/p = dphi/g/rhodz |
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136 | geopot(ij,l+1) = geopot(ij,l) + (g*kappa)*rhodz(ij,l)*theta(ij,l,1)*exner_ik/p_ik |
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137 | ENDDO |
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138 | CASE(thermo_entropy) ! theta is in fact entropy = cpp*log(theta/Treff) = cpp*log(T/Treff) - Rd*log(p/preff) |
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139 | !DIR$ SIMD |
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140 | DO ij=ij_omp_begin_ext,ij_omp_end_ext |
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141 | p_ik = pk(ij,l) |
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142 | temp_ik = Treff*exp((theta(ij,l,1) + Rd*log(p_ik/preff))/cpp) |
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143 | pk(ij,l) = temp_ik |
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144 | ! specific volume v = Rd*T/p = dphi/g/rhodz |
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145 | geopot(ij,l+1) = geopot(ij,l) + (g*Rd)*rhodz(ij,l)*temp_ik/p_ik |
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146 | ENDDO |
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147 | CASE(thermo_moist) ! theta is moist pseudo-entropy per dry air mass |
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148 | DO ij=ij_omp_begin_ext,ij_omp_end_ext |
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149 | p_ik = pk(ij,l) |
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150 | qv = theta(ij,l,2) ! water vaper mixing ratio = mv/md |
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151 | Rmix = Rd+qv*Rv |
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152 | chi = ( theta(ij,l,1) + Rmix*log(p_ik/preff) ) / (cpp + qv*cppv) ! log(T/Treff) |
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153 | temp_ik = Treff*exp(chi) |
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154 | pk(ij,l) = temp_ik |
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155 | ! specific volume v = R*T/p = dphi/g/rhodz |
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156 | ! R = (Rd + qv.Rv)/(1+qv) |
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157 | geopot(ij,l+1) = geopot(ij,l) + g*Rmix*rhodz(ij,l)*temp_ik/(p_ik*(1+qv)) |
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158 | ENDDO |
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159 | CASE DEFAULT |
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160 | STOP |
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161 | END SELECT |
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162 | ENDDO |
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163 | END IF |
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164 | |
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165 | !ym flush geopot |
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166 | !$OMP BARRIER |
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167 | |
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168 | CALL trace_end("compute_geopot") |
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169 | |
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170 | END SUBROUTINE compute_geopot_manual |
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171 | |
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172 | END MODULE compute_geopot_mod |
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