1 | ! |
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2 | ! $Id: iniacademic.F90 1492 2011-03-08 08:10:25Z aborella $ |
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3 | ! |
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4 | SUBROUTINE iniacademic(vcov,ucov,teta,q,masse,ps,phis,time_0) |
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5 | |
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6 | USE filtreg_mod |
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7 | USE infotrac, ONLY : nqtot |
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8 | USE control_mod, ONLY: day_step,planet_type |
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9 | #ifdef CPP_IOIPSL |
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10 | USE IOIPSL |
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11 | #else |
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12 | ! if not using IOIPSL, we still need to use (a local version of) getin |
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13 | USE ioipsl_getincom |
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14 | #endif |
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15 | USE Write_Field |
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16 | |
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17 | ! Author: Frederic Hourdin original: 15/01/93 |
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18 | ! The forcing defined here is from Held and Suarez, 1994, Bulletin |
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19 | ! of the American Meteorological Society, 75, 1825. |
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20 | |
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21 | IMPLICIT NONE |
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22 | |
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23 | ! Declararations: |
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24 | ! --------------- |
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25 | |
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26 | include "dimensions.h" |
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27 | include "paramet.h" |
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28 | include "comvert.h" |
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29 | include "comconst.h" |
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30 | include "comgeom.h" |
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31 | include "academic.h" |
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32 | include "ener.h" |
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33 | include "temps.h" |
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34 | include "iniprint.h" |
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35 | include "logic.h" |
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36 | |
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37 | ! Arguments: |
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38 | ! ---------- |
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39 | |
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40 | real time_0 |
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41 | |
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42 | ! variables dynamiques |
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43 | REAL vcov(ip1jm,llm),ucov(ip1jmp1,llm) ! vents covariants |
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44 | REAL teta(ip1jmp1,llm) ! temperature potentielle |
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45 | REAL q(ip1jmp1,llm,nqtot) ! champs advectes |
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46 | REAL ps(ip1jmp1) ! pression au sol |
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47 | REAL masse(ip1jmp1,llm) ! masse d'air |
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48 | REAL phis(ip1jmp1) ! geopotentiel au sol |
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49 | |
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50 | ! Local: |
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51 | ! ------ |
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52 | |
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53 | REAL p (ip1jmp1,llmp1 ) ! pression aux interfac.des couches |
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54 | REAL pks(ip1jmp1) ! exner au sol |
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55 | REAL pk(ip1jmp1,llm) ! exner au milieu des couches |
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56 | REAL pkf(ip1jmp1,llm) ! exner filt.au milieu des couches |
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57 | REAL phi(ip1jmp1,llm) ! geopotentiel |
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58 | REAL ddsin,zsig,tetapv,w_pv ! variables auxiliaires |
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59 | real tetastrat ! potential temperature in the stratosphere, in K |
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60 | real tetajl(jjp1,llm) |
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61 | INTEGER i,j,l,lsup,ij |
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62 | |
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63 | REAL teta0,ttp,delt_y,delt_z,eps ! Constantes pour profil de T |
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64 | REAL k_f,k_c_a,k_c_s ! Constantes de rappel |
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65 | LOGICAL ok_geost ! Initialisation vent geost. ou nul |
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66 | LOGICAL ok_pv ! Polar Vortex |
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67 | REAL phi_pv,dphi_pv,gam_pv ! Constantes pour polar vortex |
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68 | |
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69 | real zz,ran1 |
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70 | integer idum |
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71 | |
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72 | REAL alpha(ip1jmp1,llm),beta(ip1jmp1,llm),zdtvr |
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73 | |
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74 | !----------------------------------------------------------------------- |
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75 | ! 1. Initializations for Earth-like case |
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76 | ! -------------------------------------- |
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77 | ! |
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78 | ! initialize planet radius, rotation rate,... |
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79 | call conf_planete |
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80 | |
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81 | time_0=0. |
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82 | day_ref=1 |
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83 | annee_ref=0 |
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84 | |
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85 | im = iim |
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86 | jm = jjm |
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87 | day_ini = 1 |
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88 | dtvr = daysec/REAL(day_step) |
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89 | zdtvr=dtvr |
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90 | etot0 = 0. |
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91 | ptot0 = 0. |
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92 | ztot0 = 0. |
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93 | stot0 = 0. |
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94 | ang0 = 0. |
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95 | |
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96 | if (llm == 1) then |
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97 | ! specific initializations for the shallow water case |
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98 | kappa=1 |
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99 | endif |
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100 | |
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101 | CALL iniconst |
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102 | CALL inigeom |
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103 | CALL inifilr |
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104 | |
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105 | if (llm == 1) then |
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106 | ! initialize fields for the shallow water case, if required |
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107 | if (.not.read_start) then |
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108 | phis(:)=0. |
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109 | q(:,:,:)=0 |
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110 | CALL sw_case_williamson91_6(vcov,ucov,teta,masse,ps) |
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111 | endif |
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112 | endif |
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113 | |
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114 | academic_case: if (iflag_phys == 2) then |
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115 | ! initializations |
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116 | |
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117 | ! 1. local parameters |
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118 | ! by convention, winter is in the southern hemisphere |
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119 | ! Geostrophic wind or no wind? |
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120 | ok_geost=.TRUE. |
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121 | CALL getin('ok_geost',ok_geost) |
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122 | ! Constants for Newtonian relaxation and friction |
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123 | k_f=1. !friction |
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124 | CALL getin('k_j',k_f) |
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125 | k_f=1./(daysec*k_f) |
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126 | k_c_s=4. !cooling surface |
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127 | CALL getin('k_c_s',k_c_s) |
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128 | k_c_s=1./(daysec*k_c_s) |
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129 | k_c_a=40. !cooling free atm |
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130 | CALL getin('k_c_a',k_c_a) |
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131 | k_c_a=1./(daysec*k_c_a) |
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132 | ! Constants for Teta equilibrium profile |
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133 | teta0=315. ! mean Teta (S.H. 315K) |
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134 | CALL getin('teta0',teta0) |
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135 | ttp=200. ! Tropopause temperature (S.H. 200K) |
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136 | CALL getin('ttp',ttp) |
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137 | eps=0. ! Deviation to N-S symmetry(~0-20K) |
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138 | CALL getin('eps',eps) |
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139 | delt_y=60. ! Merid Temp. Gradient (S.H. 60K) |
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140 | CALL getin('delt_y',delt_y) |
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141 | delt_z=10. ! Vertical Gradient (S.H. 10K) |
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142 | CALL getin('delt_z',delt_z) |
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143 | ! Polar vortex |
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144 | ok_pv=.false. |
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145 | CALL getin('ok_pv',ok_pv) |
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146 | phi_pv=-50. ! Latitude of edge of vortex |
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147 | CALL getin('phi_pv',phi_pv) |
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148 | phi_pv=phi_pv*pi/180. |
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149 | dphi_pv=5. ! Width of the edge |
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150 | CALL getin('dphi_pv',dphi_pv) |
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151 | dphi_pv=dphi_pv*pi/180. |
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152 | gam_pv=4. ! -dT/dz vortex (in K/km) |
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153 | CALL getin('gam_pv',gam_pv) |
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154 | |
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155 | ! 2. Initialize fields towards which to relax |
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156 | ! Friction |
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157 | knewt_g=k_c_a |
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158 | DO l=1,llm |
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159 | zsig=presnivs(l)/preff |
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160 | knewt_t(l)=(k_c_s-k_c_a)*MAX(0.,(zsig-0.7)/0.3) |
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161 | kfrict(l)=k_f*MAX(0.,(zsig-0.7)/0.3) |
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162 | ENDDO |
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163 | DO j=1,jjp1 |
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164 | clat4((j-1)*iip1+1:j*iip1)=cos(rlatu(j))**4 |
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165 | ENDDO |
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166 | |
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167 | ! Potential temperature |
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168 | DO l=1,llm |
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169 | zsig=presnivs(l)/preff |
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170 | tetastrat=ttp*zsig**(-kappa) |
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171 | tetapv=tetastrat |
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172 | IF ((ok_pv).AND.(zsig.LT.0.1)) THEN |
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173 | tetapv=tetastrat*(zsig*10.)**(kappa*cpp*gam_pv/1000./g) |
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174 | ENDIF |
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175 | DO j=1,jjp1 |
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176 | ! Troposphere |
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177 | ddsin=sin(rlatu(j)) |
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178 | tetajl(j,l)=teta0-delt_y*ddsin*ddsin+eps*ddsin & |
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179 | -delt_z*(1.-ddsin*ddsin)*log(zsig) |
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180 | ! Profil stratospherique isotherme (+vortex) |
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181 | w_pv=(1.-tanh((rlatu(j)-phi_pv)/dphi_pv))/2. |
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182 | tetastrat=tetastrat*(1.-w_pv)+tetapv*w_pv |
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183 | tetajl(j,l)=MAX(tetajl(j,l),tetastrat) |
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184 | ENDDO |
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185 | ENDDO |
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186 | |
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187 | ! CALL writefield('theta_eq',tetajl) |
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188 | |
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189 | do l=1,llm |
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190 | do j=1,jjp1 |
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191 | do i=1,iip1 |
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192 | ij=(j-1)*iip1+i |
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193 | tetarappel(ij,l)=tetajl(j,l) |
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194 | enddo |
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195 | enddo |
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196 | enddo |
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197 | |
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198 | ! 3. Initialize fields (if necessary) |
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199 | IF (.NOT. read_start) THEN |
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200 | ! surface pressure |
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201 | ps(:)=preff |
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202 | ! ground geopotential |
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203 | phis(:)=0. |
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204 | |
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205 | CALL pression ( ip1jmp1, ap, bp, ps, p ) |
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206 | CALL exner_hyb( ip1jmp1, ps, p,alpha,beta, pks, pk, pkf ) |
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207 | CALL massdair(p,masse) |
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208 | |
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209 | ! bulk initialization of temperature |
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210 | teta(:,:)=tetarappel(:,:) |
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211 | |
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212 | ! geopotential |
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213 | CALL geopot(ip1jmp1,teta,pk,pks,phis,phi) |
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214 | |
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215 | ! winds |
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216 | if (ok_geost) then |
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217 | call ugeostr(phi,ucov) |
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218 | else |
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219 | ucov(:,:)=0. |
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220 | endif |
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221 | vcov(:,:)=0. |
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222 | |
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223 | ! bulk initialization of tracers |
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224 | if (planet_type=="earth") then |
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225 | ! Earth: first two tracers will be water |
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226 | do i=1,nqtot |
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227 | if (i == 1) q(:,:,i)=1.e-10 |
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228 | if (i == 2) q(:,:,i)=1.e-15 |
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229 | if (i.gt.2) q(:,:,i)=0. |
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230 | enddo |
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231 | else |
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232 | q(:,:,:)=0 |
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233 | endif ! of if (planet_type=="earth") |
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234 | |
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235 | ! add random perturbation to temperature |
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236 | idum = -1 |
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237 | zz = ran1(idum) |
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238 | idum = 0 |
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239 | do l=1,llm |
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240 | do ij=iip2,ip1jm |
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241 | teta(ij,l)=teta(ij,l)*(1.+0.005*ran1(idum)) |
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242 | enddo |
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243 | enddo |
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244 | |
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245 | ! maintain periodicity in longitude |
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246 | do l=1,llm |
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247 | do ij=1,ip1jmp1,iip1 |
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248 | teta(ij+iim,l)=teta(ij,l) |
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249 | enddo |
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250 | enddo |
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251 | |
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252 | ENDIF ! of IF (.NOT. read_start) |
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253 | endif academic_case |
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254 | |
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255 | END SUBROUTINE iniacademic |
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