1 | MODULE advect_tracer_mod |
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2 | USE icosa |
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3 | IMPLICIT NONE |
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4 | PRIVATE |
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5 | |
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6 | TYPE(t_field),POINTER :: f_normal(:) |
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7 | TYPE(t_field),POINTER :: f_tangent(:) |
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8 | TYPE(t_field),POINTER :: f_gradq3d(:) |
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9 | TYPE(t_field),POINTER :: f_cc(:) ! starting point of backward-trajectory (Miura approach) |
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10 | |
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11 | REAL(rstd), PARAMETER :: pente_max=2.0 ! for vlz |
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12 | |
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13 | PUBLIC init_advect_tracer, advect_tracer |
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14 | |
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15 | CONTAINS |
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16 | |
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17 | SUBROUTINE init_advect_tracer |
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18 | USE advect_mod |
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19 | REAL(rstd),POINTER :: tangent(:,:) |
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20 | REAL(rstd),POINTER :: normal(:,:) |
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21 | INTEGER :: ind |
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22 | |
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23 | CALL allocate_field(f_normal,field_u,type_real,3, name='normal') |
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24 | CALL allocate_field(f_tangent,field_u,type_real,3, name='tangent') |
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25 | CALL allocate_field(f_gradq3d,field_t,type_real,llm,3, name='gradq3d') |
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26 | CALL allocate_field(f_cc,field_u,type_real,llm,3, name='cc') |
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27 | |
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28 | DO ind=1,ndomain |
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29 | CALL swap_dimensions(ind) |
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30 | CALL swap_geometry(ind) |
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31 | normal=f_normal(ind) |
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32 | tangent=f_tangent(ind) |
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33 | CALL init_advect(normal,tangent) |
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34 | END DO |
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35 | |
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36 | END SUBROUTINE init_advect_tracer |
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37 | |
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38 | SUBROUTINE advect_tracer(f_hfluxt, f_wfluxt,f_u, f_q,f_rhodz) |
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39 | USE advect_mod |
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40 | USE mpipara |
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41 | IMPLICIT NONE |
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42 | |
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43 | TYPE(t_field),POINTER :: f_hfluxt(:) ! time-integrated horizontal mass flux |
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44 | TYPE(t_field),POINTER :: f_wfluxt(:) ! time-integrated vertical mass flux |
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45 | TYPE(t_field),POINTER :: f_u(:) ! velocity (for back-trajectories) |
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46 | TYPE(t_field),POINTER :: f_q(:) ! tracer |
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47 | TYPE(t_field),POINTER :: f_rhodz(:) ! mass field at beginning of macro time step |
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48 | |
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49 | REAL(rstd),POINTER :: q(:,:,:), normal(:,:), tangent(:,:), gradq3d(:,:,:), cc(:,:,:) |
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50 | REAL(rstd),POINTER :: hfluxt(:,:), wfluxt(:,:) |
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51 | REAL(rstd),POINTER :: rhodz(:,:), u(:,:) |
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52 | INTEGER :: ind,k |
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53 | |
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54 | CALL transfert_request(f_u,req_e1) |
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55 | ! CALL transfert_request(f_hfluxt,req_e1) ! BUG : This (unnecessary) transfer makes the computation go wrong |
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56 | CALL transfert_request(f_wfluxt,req_i1) |
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57 | CALL transfert_request(f_q,req_i1) |
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58 | CALL transfert_request(f_rhodz,req_i1) |
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59 | |
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60 | IF (is_mpi_root) PRINT *, 'Advection scheme' |
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61 | |
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62 | ! DO ind=1,ndomain |
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63 | ! CALL swap_dimensions(ind) |
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64 | ! CALL swap_geometry(ind) |
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65 | ! normal = f_normal(ind) |
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66 | ! tangent = f_tangent(ind) |
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67 | ! cc = f_cc(ind) |
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68 | ! u = f_u(ind) |
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69 | ! q = f_q(ind) |
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70 | ! rhodz = f_rhodz(ind) |
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71 | ! hfluxt = f_hfluxt(ind) |
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72 | ! wfluxt = f_wfluxt(ind) |
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73 | ! gradq3d = f_gradq3d(ind) |
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74 | ! |
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75 | ! ! 1/2 vertical transport |
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76 | ! DO k = 1, nqtot |
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77 | ! CALL vlz(k==nqtot,0.5, wfluxt,rhodz,q(:,:,k)) |
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78 | ! END DO |
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79 | ! |
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80 | ! ! horizontal transport |
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81 | ! CALL compute_backward_traj(tangent,normal,u,0.5*dt*itau_adv, cc) |
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82 | ! DO k = 1,nqtot |
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83 | ! CALL compute_gradq3d(q(:,:,k),gradq3d) |
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84 | ! CALL compute_advect_horiz(k==nqtot,hfluxt,cc,gradq3d, rhodz,q(:,:,k)) |
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85 | ! END DO |
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86 | ! |
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87 | ! ! 1/2 vertical transport |
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88 | ! DO k = 1,nqtot |
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89 | ! CALL vlz(k==nqtot, 0.5,wfluxt,rhodz, q(:,:,k)) |
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90 | ! END DO |
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91 | ! END DO |
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92 | |
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93 | ! 1/2 vertical transport + back-trajectories |
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94 | DO ind=1,ndomain |
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95 | CALL swap_dimensions(ind) |
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96 | CALL swap_geometry(ind) |
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97 | normal = f_normal(ind) |
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98 | tangent = f_tangent(ind) |
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99 | cc = f_cc(ind) |
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100 | u = f_u(ind) |
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101 | q = f_q(ind) |
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102 | rhodz = f_rhodz(ind) |
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103 | wfluxt = f_wfluxt(ind) |
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104 | DO k = 1, nqtot |
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105 | CALL vlz(k==nqtot,0.5, wfluxt,rhodz,q(:,:,k)) |
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106 | END DO |
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107 | CALL compute_backward_traj(tangent,normal,u,0.5*dt*itau_adv, cc) |
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108 | END DO |
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109 | |
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110 | CALL transfert_request(f_q,req_i1) ! necessary ? |
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111 | CALL transfert_request(f_rhodz,req_i1) ! necessary ? |
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112 | |
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113 | ! horizontal transport - split in two to place transfer of gradq3d |
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114 | |
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115 | DO k = 1, nqtot |
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116 | DO ind=1,ndomain |
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117 | CALL swap_dimensions(ind) |
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118 | CALL swap_geometry(ind) |
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119 | q = f_q(ind) |
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120 | gradq3d = f_gradq3d(ind) |
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121 | CALL compute_gradq3d(q(:,:,k),gradq3d) |
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122 | END DO |
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123 | |
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124 | CALL transfert_request(f_gradq3d,req_i1) |
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125 | |
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126 | DO ind=1,ndomain |
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127 | CALL swap_dimensions(ind) |
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128 | CALL swap_geometry(ind) |
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129 | cc = f_cc(ind) |
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130 | q = f_q(ind) |
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131 | rhodz = f_rhodz(ind) |
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132 | hfluxt = f_hfluxt(ind) |
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133 | gradq3d = f_gradq3d(ind) |
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134 | CALL compute_advect_horiz(k==nqtot,hfluxt,cc,gradq3d, rhodz,q(:,:,k)) |
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135 | END DO |
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136 | END DO |
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137 | |
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138 | CALL transfert_request(f_q,req_i1) ! necessary ? |
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139 | CALL transfert_request(f_rhodz,req_i1) ! necessary ? |
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140 | |
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141 | ! 1/2 vertical transport |
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142 | DO ind=1,ndomain |
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143 | CALL swap_dimensions(ind) |
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144 | CALL swap_geometry(ind) |
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145 | q = f_q(ind) |
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146 | rhodz = f_rhodz(ind) |
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147 | wfluxt = f_wfluxt(ind) |
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148 | DO k = 1,nqtot |
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149 | CALL vlz(k==nqtot, 0.5,wfluxt,rhodz, q(:,:,k)) |
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150 | END DO |
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151 | END DO |
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152 | |
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153 | END SUBROUTINE advect_tracer |
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154 | |
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155 | SUBROUTINE vlz(update_mass, fac,wfluxt,mass, q) |
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156 | ! |
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157 | ! Auteurs: P.Le Van, F.Hourdin, F.Forget, T. Dubos |
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158 | ! |
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159 | ! ******************************************************************** |
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160 | ! Update tracers using vertical mass flux only |
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161 | ! Van Leer scheme with minmod limiter |
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162 | ! wfluxt >0 for upward transport |
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163 | ! ******************************************************************** |
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164 | IMPLICIT NONE |
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165 | LOGICAL, INTENT(IN) :: update_mass |
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166 | REAL(rstd), INTENT(IN) :: fac, wfluxt(iim*jjm,llm+1) ! vertical mass flux |
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167 | REAL(rstd), INTENT(INOUT) :: mass(iim*jjm,llm) |
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168 | REAL(rstd), INTENT(INOUT) :: q(iim*jjm,llm) |
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169 | |
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170 | REAL(rstd) :: dq(iim*jjm,llm), & ! increase of q |
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171 | dzqw(iim*jjm,llm), & ! vertical finite difference of q |
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172 | adzqw(iim*jjm,llm), & ! abs(dzqw) |
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173 | dzq(iim*jjm,llm), & ! limited slope of q |
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174 | wq(iim*jjm,llm+1) ! time-integrated flux of q |
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175 | REAL(rstd) :: dzqmax, newmass, sigw, qq, w |
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176 | INTEGER :: i,ij,l,j |
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177 | |
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178 | ! finite difference of q |
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179 | DO l=2,llm |
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180 | DO j=jj_begin-1,jj_end+1 |
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181 | DO i=ii_begin-1,ii_end+1 |
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182 | ij=(j-1)*iim+i |
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183 | dzqw(ij,l)=q(ij,l)-q(ij,l-1) |
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184 | adzqw(ij,l)=abs(dzqw(ij,l)) |
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185 | ENDDO |
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186 | ENDDO |
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187 | ENDDO |
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188 | |
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189 | ! minmod-limited slope of q |
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190 | ! dzq = slope*dz, i.e. the reconstructed q varies by dzq inside level l |
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191 | DO l=2,llm-1 |
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192 | DO j=jj_begin-1,jj_end+1 |
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193 | DO i=ii_begin-1,ii_end+1 |
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194 | ij=(j-1)*iim+i |
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195 | IF(dzqw(ij,l)*dzqw(ij,l+1).gt.0.) THEN |
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196 | dzq(ij,l) = 0.5*( dzqw(ij,l)+dzqw(ij,l+1) ) |
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197 | dzqmax = pente_max * min( adzqw(ij,l),adzqw(ij,l+1) ) |
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198 | dzq(ij,l) = sign( min(abs(dzq(ij,l)),dzqmax) , dzq(ij,l) ) ! NB : sign(a,b)=a*sign(b) |
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199 | ELSE |
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200 | dzq(ij,l)=0. |
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201 | ENDIF |
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202 | ENDDO |
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203 | ENDDO |
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204 | ENDDO |
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205 | |
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206 | ! 0 slope in top and bottom layers |
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207 | DO j=jj_begin-1,jj_end+1 |
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208 | DO i=ii_begin-1,ii_end+1 |
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209 | ij=(j-1)*iim+i |
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210 | dzq(ij,1)=0. |
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211 | dzq(ij,llm)=0. |
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212 | ENDDO |
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213 | ENDDO |
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214 | |
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215 | ! sigw = fraction of mass that leaves level l/l+1 |
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216 | ! then amount of q leaving level l/l+1 = wq = w * qq |
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217 | DO l = 1,llm-1 |
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218 | DO j=jj_begin-1,jj_end+1 |
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219 | DO i=ii_begin-1,ii_end+1 |
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220 | ij=(j-1)*iim+i |
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221 | w = fac*wfluxt(ij,l+1) |
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222 | IF(w>0.) THEN ! upward transport, upwind side is at level l |
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223 | sigw = w/mass(ij,l) |
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224 | qq = q(ij,l)+0.5*(1.-sigw)*dzq(ij,l) ! qq = q if sigw=1 , qq = q+dzq/2 if sigw=0 |
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225 | ELSE ! downward transport, upwind side is at level l+1 |
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226 | sigw = w/mass(ij,l+1) |
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227 | qq = q(ij,l+1)-0.5*(1.+sigw)*dzq(ij,l+1) ! qq = q if sigw=-1 , qq = q-dzq/2 if sigw=0 |
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228 | ENDIF |
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229 | wq(ij,l+1) = w*qq |
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230 | ENDDO |
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231 | ENDDO |
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232 | END DO |
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233 | ! wq = 0 at top and bottom |
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234 | DO j=jj_begin-1,jj_end+1 |
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235 | DO i=ii_begin-1,ii_end+1 |
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236 | ij=(j-1)*iim+i |
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237 | wq(ij,llm+1)=0. |
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238 | wq(ij,1)=0. |
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239 | ENDDO |
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240 | END DO |
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241 | |
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242 | ! update q, mass is updated only after all q's have been updated |
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243 | DO l=1,llm |
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244 | DO j=jj_begin-1,jj_end+1 |
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245 | DO i=ii_begin-1,ii_end+1 |
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246 | ij=(j-1)*iim+i |
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247 | newmass = mass(ij,l) + fac*(wfluxt(ij,l)-wfluxt(ij,l+1)) |
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248 | q(ij,l) = ( q(ij,l)*mass(ij,l) + wq(ij,l)-wq(ij,l+1) ) / newmass |
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249 | IF(update_mass) mass(ij,l)=newmass |
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250 | ENDDO |
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251 | ENDDO |
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252 | END DO |
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253 | |
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254 | END SUBROUTINE vlz |
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255 | |
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256 | END MODULE advect_tracer_mod |
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