1 | SUBROUTINE surfini(ngrid,piceco2,qsurf,psolaralb) |
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2 | ! to use 'getin' |
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3 | USE ioipsl_getincom |
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4 | use netcdf |
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5 | IMPLICIT NONE |
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6 | c======================================================================= |
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7 | c |
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8 | c creation des calottes pour l'etat initial |
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9 | c |
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10 | c======================================================================= |
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11 | c----------------------------------------------------------------------- |
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12 | c Declarations: |
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13 | c ------------- |
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14 | #include "dimensions.h" |
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15 | #include "dimphys.h" |
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16 | #include "surfdat.h" |
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17 | #include "callkeys.h" |
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18 | #include "tracer.h" |
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19 | #include "comgeomfi.h" |
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20 | #include "comcstfi.h" |
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21 | |
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22 | #include "datafile.h" |
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23 | |
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24 | INTEGER ngrid,ig,icap,iq,alternate |
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25 | REAL piceco2(ngrid),psolaralb(ngrid,2) |
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26 | REAL qsurf(ngrid,nqmx) !tracer on surface (kg/m2) |
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27 | REAL icedryness ! ice dryness |
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28 | |
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29 | ! longwatercaptag is watercaptag. Trick for some compilers |
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30 | LOGICAL, DIMENSION(100000) :: longwatercaptag |
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31 | |
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32 | EXTERNAL ISMIN,ISMAX |
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33 | INTEGER ISMIN,ISMAX |
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34 | |
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35 | ! There are 3 different modes for ice distribution: |
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36 | ! icelocationmode = 1 ---> based on data from surface.nc |
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37 | ! icelocationmode = 2 ---> directly predefined for GCM resolutions 32x24 or 64x48 |
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38 | ! icelocationmode = 3 ---> based on logical relations for latitude and longitude |
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39 | ! For visualisation : > /u/tnalmd/bin/watercaps gcm_txt_output_file |
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40 | INTEGER,SAVE :: icelocationmode = 2 |
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41 | |
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42 | |
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43 | !in case icelocationmode == 1 |
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44 | INTEGER i,j |
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45 | INTEGER imd,jmd |
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46 | PARAMETER (imd=360,jmd=180) |
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47 | REAL zdata(imd,jmd) |
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48 | REAL zelat,zelon |
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49 | |
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50 | INTEGER nb_ice(ngrid,2) ! number of counts | detected ice for GCM grid |
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51 | INTEGER latice(jjm,2),lonice (iim,2) ! number of counts | detected ice along lat & lon axis |
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52 | |
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53 | REAL step,count,ratiolat |
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54 | |
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55 | INTEGER ierr,nid,nvarid |
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56 | |
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57 | REAL,SAVE :: min_icevalue = 500. |
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58 | character(len=50) :: string = 'thermal' |
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59 | |
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60 | character (len=100) :: zedatafile |
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61 | c |
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62 | c======================================================================= |
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63 | |
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64 | c water ice outliers |
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65 | c ------------------------------------------ |
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66 | |
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67 | IF ((water) .and. (caps)) THEN |
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68 | |
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69 | c Perennial H20 north cap defined by watercaptag=true (allows surface to be |
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70 | c hollowed by sublimation in vdifc). |
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71 | |
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72 | c We might not want albedodat to be modified because it is used to write |
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73 | c restart files. Instead, albedo is directly modified when needed (i.e. |
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74 | c if we have watercaptag and no co2 ice), below and in albedocaps.F90 |
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75 | |
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76 | c "Dryness coefficient" controlling the evaporation and |
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77 | c sublimation from the ground water ice (close to 1) |
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78 | c HERE, the goal is to correct for the fact |
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79 | c that the simulated permanent water ice polar caps |
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80 | c is larger than the actual cap and the atmospheric |
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81 | c opacity not always realistic. |
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82 | |
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83 | alternate = 0 |
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84 | |
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85 | if (ngridmx .ne. 1) then |
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86 | watercaptag(:) = .false. |
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87 | longwatercaptag(:) = .false. |
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88 | endif |
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89 | |
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90 | write(*,*) "Ice dryness ?" |
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91 | icedryness=1. ! default value |
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92 | call getin("icedryness",icedryness) |
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93 | write(*,*) " icedryness = ",icedryness |
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94 | dryness (:) = icedryness |
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95 | |
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96 | |
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97 | #ifdef MESOSCALE |
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98 | |
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99 | do ig=1,ngridmx |
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100 | |
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101 | !write(*,*) "all qsurf to zero. dirty." |
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102 | do iq=1,nqmx |
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103 | qsurf(ig,iq)=0. !! on jette les inputs GCM |
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104 | !! on regle juste watercaptag |
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105 | !! il faudrait garder les inputs GCM |
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106 | !! si elles sont consequentes |
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107 | enddo |
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108 | if ( ( lati(ig)*180./pi .gt. 70. ) .and. |
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109 | . ( albedodat(ig) .ge. 0.26 ) ) then |
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110 | write(*,*)"outlier ",ig |
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111 | watercaptag(ig) = .true. |
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112 | dryness(ig) = 1. |
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113 | albedodat(ig) = albedo_h2o_ice !! pour output |
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114 | else |
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115 | watercaptag(ig) = .false. |
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116 | dryness(ig) = 1. |
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117 | endif |
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118 | |
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119 | enddo |
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120 | #else |
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121 | |
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122 | |
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123 | |
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124 | IF (ngridmx .eq. 1) THEN ! special case for 1d --> do nothing |
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125 | |
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126 | print*, 'ngridmx = 1, do no put ice caps in surfini.F' |
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127 | |
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128 | ELSE IF (icelocationmode .eq. 1) THEN |
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129 | |
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130 | print*,'Surfini: ice caps defined from surface.nc' |
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131 | |
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132 | ! This method detects ice as gridded value above min_icevalue in the field "string" from surface.nc |
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133 | ! Typically, it is for thermal inertia above 500 tiu. |
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134 | ! Two conditions are verified: |
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135 | ! 1. GCM ice caps are defined such as area is conserved for a given latitude |
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136 | ! (the approximation is that all points within the GCM latitude resolution have the same area). |
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137 | ! 2. caps are placed to fill the GCM points with the most detected ice first. |
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138 | |
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139 | |
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140 | |
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141 | zedatafile = trim(datafile) |
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142 | |
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143 | |
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144 | ierr=nf90_open(trim(zedatafile)//'/surface.nc', |
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145 | & NF90_NOWRITE,nid) |
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146 | |
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147 | IF (ierr.NE.nf90_noerr) THEN |
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148 | write(*,*)'Error : cannot open file surface.nc ' |
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149 | write(*,*)'(in phymars/surfini.F)' |
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150 | write(*,*)'It should be in :',trim(zedatafile),'/' |
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151 | write(*,*)'1) You can set this path in the callphys.def file:' |
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152 | write(*,*)' datadir=/path/to/the/datafiles' |
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153 | write(*,*)'2) If necessary, surface.nc (and other datafiles)' |
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154 | write(*,*)' can be obtained online on:' |
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155 | write(*,*)' http://www.lmd.jussieu.fr/~forget/datagcm/datafile' |
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156 | CALL ABORT |
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157 | ENDIF |
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158 | |
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159 | |
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160 | ierr=nf90_inq_varid(nid, string, nvarid) |
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161 | if (ierr.ne.nf90_noerr) then |
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162 | write(*,*) 'surfini error, cannot find ',trim(string) |
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163 | write(*,*) ' in file ',trim(zedatafile),'/surface.nc' |
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164 | write(*,*)trim(nf90_strerror(ierr)) |
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165 | stop |
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166 | endif |
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167 | |
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168 | ierr=nf90_get_var(nid, nvarid, zdata) |
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169 | |
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170 | if (ierr.ne.nf90_noerr) then |
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171 | write(*,*) 'surfini: error failed loading ',trim(string) |
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172 | write(*,*)trim(nf90_strerror(ierr)) |
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173 | stop |
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174 | endif |
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175 | |
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176 | |
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177 | ierr=nf90_close(nid) |
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178 | |
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179 | |
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180 | nb_ice(:,1) = 1 ! default: there is no ice |
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181 | latice(:,1) = 1 |
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182 | lonice(:,1) = 1 |
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183 | nb_ice(:,2) = 0 |
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184 | latice(:,2) = 0 |
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185 | lonice(:,2) = 0 |
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186 | !print*,'jjm,iim',jjm,iim ! jjm = nb lati , iim = nb longi |
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187 | |
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188 | ! loop over the GCM grid - except for poles (ig=1 and ngridmx) |
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189 | do ig=2,ngridmx-1 |
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190 | |
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191 | ! loop over the surface file grid |
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192 | do i=1,imd |
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193 | do j=1,jmd |
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194 | zelon = i - 180. |
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195 | zelat = 90. - j |
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196 | if ((abs(lati(ig)*180./pi-zelat) .le. 90./real(jjm)) .and. |
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197 | & (abs(long(ig)*180./pi-zelon) .le. 180./real(iim))) then |
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198 | ! count all points in that GCM grid point |
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199 | nb_ice(ig,1) = nb_ice(ig,1) + 1 |
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200 | if (zdata(i,j) > min_icevalue) |
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201 | ! count all detected points in that GCM grid point |
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202 | & nb_ice(ig,2) = nb_ice(ig,2) + 1 |
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203 | endif |
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204 | enddo |
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205 | enddo |
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206 | |
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207 | ! projection of nb_ice on GCM lat and lon axes |
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208 | latice(1+(ig-2)/iim,:) = |
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209 | & latice(1+(ig-2)/iim,:) + nb_ice(ig,:) |
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210 | lonice(1+mod(ig-2,iim),:) = |
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211 | & lonice(1+mod(ig-2,iim),:) + nb_ice(ig,:) ! lonice is USELESS ... |
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212 | |
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213 | enddo ! of do ig=2,ngridmx-1 |
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214 | |
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215 | |
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216 | |
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217 | ! special case for poles |
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218 | nb_ice(1,2) = 1 ! ice prescribed on north pole |
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219 | latice(1,:) = nb_ice(1,:) |
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220 | lonice(1,:) = nb_ice(1,:) |
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221 | latice(jjm,:) = nb_ice(ngridmx,:) |
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222 | lonice(iim,:) = nb_ice(ngridmx,:) |
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223 | |
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224 | |
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225 | ! print*, 'latice TOT', latice(:,1) |
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226 | ! print*, 'latice FOUND', latice(:,2) |
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227 | ! print*, 'lonice TOT', lonice(:,1) |
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228 | ! print*, 'lonice FOUND', lonice(:,2) |
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229 | |
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230 | ! print*, 'lat ratio', int(real(latice(:,2))/real(latice(:,1))*iim) |
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231 | ! print*, 'lon ratio', int(real(lonice(:,2))/real(lonice(:,1))*jjm) |
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232 | |
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233 | ! print*,'' |
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234 | ! print*,'sum lat', sum(latice(:,1)), sum(lonice(:,1)) |
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235 | ! print*,'sum lon', sum(latice(:,2)), sum(lonice(:,2)) |
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236 | |
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237 | |
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238 | ! loop over GCM latitudes. CONSIDER ONLY NORTHERN HEMISPHERE |
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239 | do i=1,jjm/2 |
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240 | step = 1. ! threshold to add ice cap |
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241 | count = 0. ! number of ice GCM caps at this latitude |
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242 | ! ratiolat is the ratio of area covered by ice within this GCM latitude range |
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243 | ratiolat = real(latice(i,2))/real(latice(i,1)) |
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244 | !print*,'i',i,(i-1)*iim+2,i*iim+1 |
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245 | |
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246 | ! put ice caps while there is not enough ice, |
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247 | ! as long as the threshold is above 20% |
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248 | do while ( (count .le. ratiolat*iim ) .and. (step .ge. 0.2)) |
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249 | count = 0. |
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250 | ! loop over GCM longitudes |
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251 | do j=1,iim |
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252 | ! if the detected ice ratio in the GCM grid point |
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253 | ! is more than 'step', then add ice |
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254 | if (real(nb_ice((i-1)*iim+1+j,2)) |
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255 | & / real(nb_ice((i-1)*iim+1+j,1)) .ge. step) then |
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256 | watercaptag((i-1)*iim+1+j) = .true. |
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257 | count = count + 1 |
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258 | endif |
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259 | enddo ! of do j=1,iim |
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260 | !print*, 'step',step,count,ratiolat*iim |
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261 | step = step - 0.01 |
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262 | enddo ! of do while |
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263 | !print*, 'step',step,count,ratiolat*iim |
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264 | |
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265 | enddo ! of do i=1,jjm/2 |
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266 | |
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267 | |
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268 | ELSE IF (icelocationmode .eq. 2) THEN |
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269 | |
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270 | print*,'Surfini: predefined ice caps' |
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271 | |
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272 | if ((iim .eq. 32) .and. (jjm .eq. 24)) then ! 32x24 |
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273 | |
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274 | print*,'water ice caps distribution for 32x24 resolution' |
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275 | longwatercaptag(1:9) = .true. ! central cap - core |
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276 | longwatercaptag(26:33) = .true. ! central cap |
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277 | longwatercaptag(1:33) = .true. ! central cap |
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278 | longwatercaptag(56) = .true. ! central cap |
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279 | longwatercaptag(58) = .true. ! central cap |
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280 | longwatercaptag(60) = .true. ! central cap |
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281 | longwatercaptag(62) = .true. ! central cap |
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282 | longwatercaptag(64) = .true. ! central cap |
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283 | !--------------------- OUTLIERS ---------------------------- |
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284 | |
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285 | else if ((iim .eq. 64) .and. (jjm .eq. 48)) then ! 64x48 |
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286 | |
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287 | print*,'water ice caps distribution for 64x48 resolution' |
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288 | longwatercaptag(1:65) = .true. ! central cap - core |
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289 | longwatercaptag(75:85) = .true. ! central cap |
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290 | longwatercaptag(93:114) = .true. ! central cap |
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291 | !--------------------- OUTLIERS ---------------------------- |
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292 | if (.true.) then |
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293 | longwatercaptag(136) = .true. ! outlier, lat = 78.75 |
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294 | longwatercaptag(138) = .true. ! outlier, lat = 78.75 |
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295 | longwatercaptag(140) = .true. ! outlier, lat = 78.75 |
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296 | longwatercaptag(142) = .true. ! outlier, lat = 78.75 |
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297 | longwatercaptag(161) = .true. ! outlier, lat = 78.75 |
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298 | longwatercaptag(163) = .true. ! outlier, lat = 78.75 |
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299 | longwatercaptag(165) = .true. ! outlier, lat = 78.75 |
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300 | longwatercaptag(183) = .true. ! outlier, lat = 78.75 |
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301 | longwatercaptag(185) = .true. ! outlier, lat = 78.75 |
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302 | longwatercaptag(187) = .true. ! outlier, lat = 78.75 |
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303 | longwatercaptag(189) = .true. ! outlier, lat = 78.75 |
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304 | longwatercaptag(191) = .true. ! outlier, lat = 78.75 |
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305 | longwatercaptag(193) = .true. ! outlier, lat = 78.75 |
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306 | longwatercaptag(194) = .true. ! outlier, lat = 75 |
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307 | longwatercaptag(203) = .true. ! outlier, lat = 75 |
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308 | longwatercaptag(207) = .true. ! outlier, lat = 75 |
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309 | longwatercaptag(244) = .true. ! outlier, lat = 75 |
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310 | longwatercaptag(246) = .true. ! outlier, lat = 75 |
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311 | longwatercaptag(250) = .true. ! outlier, lat = 75 |
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312 | longwatercaptag(252) = .true. ! outlier, lat = 75 |
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313 | longwatercaptag(254) = .true. ! outlier, lat = 75 |
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314 | longwatercaptag(256) = .true. ! outlier, lat = 75 |
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315 | endif |
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316 | !-------------------------------------------------------------- |
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317 | |
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318 | |
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319 | |
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320 | else if (ngridmx .ne. 1) then |
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321 | |
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322 | print*,'No predefined ice location for this resolution :',iim,jjm |
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323 | print*,'Please change icelocationmode in surfini.F' |
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324 | print*,'Or add some new definitions ...' |
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325 | call abort |
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326 | |
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327 | endif |
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328 | |
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329 | do ig=1,ngridmx |
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330 | if (longwatercaptag(ig)) watercaptag(ig) = .true. |
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331 | enddo |
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332 | |
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333 | |
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334 | ELSE IF (icelocationmode .eq. 3) THEN |
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335 | |
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336 | print*,'Surfini: ice caps defined by lat and lon values' |
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337 | |
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338 | do ig=1,ngridmx |
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339 | |
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340 | c-------- Towards olympia planitia water caps ----------- |
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341 | c-------------------------------------------------------- |
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342 | |
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343 | if ( ( ( lati(ig)*180./pi .ge. 77. ) .and. ! cap #2 |
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344 | . ( lati(ig)*180./pi .le. 80. ) .and. |
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345 | . ( long(ig)*180./pi .ge. 110. ) .and. |
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346 | . ( long(ig)*180./pi .le. 181. ) ) |
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347 | . .or. |
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348 | |
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349 | . ( ( lati(ig)*180./pi .ge. 75. ) .and. ! cap #4 (Korolev crater) |
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350 | . ( lati(ig)*180./pi .le. 76. ) .and. |
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351 | . ( long(ig)*180./pi .ge. 150. ) .and. |
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352 | . ( long(ig)*180./pi .le. 168. ) ) |
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353 | . .or. |
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354 | . ( ( lati(ig)*180./pi .ge. 77 ) .and. ! cap #5 |
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355 | . ( lati(ig)*180./pi .le. 80. ) .and. |
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356 | . ( long(ig)*180./pi .ge. -150.) .and. |
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357 | . ( long(ig)*180./pi .le. -110.) ) ) |
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358 | . then |
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359 | |
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360 | if ((alternate .eq. 0)) then ! 1/2 en 64x48 sinon trop large en lat |
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361 | ! watercaptag(ig)=.true. |
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362 | alternate = 1 |
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363 | else |
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364 | alternate = 0 |
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365 | endif !end if alternate = 0 |
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366 | |
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367 | endif |
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368 | |
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369 | c----------- Opposite olympia planitia water cap -------- |
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370 | c-------------------------------------------------------- |
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371 | |
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372 | if ( ( ( lati(ig)*180./pi .ge. 80 ) .and. |
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373 | . ( lati(ig)*180./pi .le. 84 ) ) |
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374 | . .and. |
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375 | . ( ( long(ig)*180./pi .lt. -95. ) .or. !!! 32x24 |
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376 | . ( long(ig)*180./pi .gt. 85. ) ) ) then !!! 32x24 |
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377 | ! . ( ( ( long(ig)*180./pi .ge. -29. ) .and. !!! 64x48 |
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378 | ! . ( long(ig)*180./pi .le. 90. ) ) .or. !!! 64x48 |
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379 | ! . ( ( long(ig)*180./pi .ge. -77. ) .and. !!! 64x48 |
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380 | ! . ( long(ig)*180./pi .le. -70. ) ) ) ) then !!! 64x48 |
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381 | ! watercaptag(ig)=.true. |
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382 | endif |
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383 | |
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384 | |
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385 | c -------------------- Central cap ---------------------- |
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386 | c-------------------------------------------------------- |
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387 | |
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388 | if (abs(lati(ig)*180./pi).gt.80) |
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389 | . watercaptag(ig)=.true. |
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390 | |
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391 | c-------------------------------------------------------- |
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392 | c-------------------------------------------------------- |
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393 | end do ! of (ngridmx) |
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394 | |
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395 | |
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396 | ELSE |
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397 | |
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398 | print*, 'In surfini.F, icelocationmode is ', icelocationmode |
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399 | print*, 'It should be 1, 2 or 3.' |
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400 | call abort |
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401 | |
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402 | ENDIF ! of if (icelocation) |
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403 | |
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404 | |
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405 | ! print caps locations - useful for plots too |
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406 | print*,'latitude | longitude | ig' |
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407 | do ig=1,ngridmx |
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408 | dryness (ig) = icedryness |
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409 | |
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410 | if (watercaptag(ig)) then |
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411 | print*,'ice water cap', lati(ig)*180./pi, |
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412 | . long(ig)*180./pi, ig |
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413 | endif |
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414 | enddo |
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415 | |
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416 | #endif |
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417 | |
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418 | ENDIF ! (caps & water) |
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419 | |
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420 | |
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421 | c =============================================================== |
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422 | c INITIAL ALBEDO |
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423 | c =============================================================== |
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424 | |
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425 | write(*,*)"surfini: water frost thickness", |
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426 | s frost_albedo_threshold |
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427 | write(*,*)"surfini: water ice albedo:", albedo_h2o_ice |
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428 | write(*,*)"surfini: water ice TI:", inert_h2o_ice |
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429 | |
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430 | c To start with : Initial albedo = observed dataset |
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431 | c ------------------------------------------------- |
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432 | DO ig=1,ngrid |
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433 | psolaralb(ig,1)=albedodat(ig) |
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434 | psolaralb(ig,2)=albedodat(ig) |
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435 | END DO |
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436 | PRINT*,'minimum albedo sans water caps', |
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437 | s albedodat(ISMIN(ngrid,albedodat,1)) |
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438 | PRINT*,'maximum albedo sans water caps', |
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439 | s albedodat(ISMAX(ngrid,albedodat,1)) |
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440 | |
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441 | c initial albedo if permanent H2O ice is present |
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442 | c ------------------------------------------------ |
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443 | IF ((water) .and. (caps)) THEN |
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444 | DO ig=1,ngrid |
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445 | IF (watercaptag(ig)) THEN |
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446 | psolaralb(ig,1) = albedo_h2o_ice |
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447 | psolaralb(ig,2) = albedo_h2o_ice |
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448 | ENDIF |
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449 | END DO |
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450 | PRINT*,'minimum albedo avec water caps', |
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451 | s psolaralb(ISMIN(ngrid,psolaralb,1),1) |
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452 | PRINT*,'maximum albedo avec water caps', |
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453 | s psolaralb(ISMAX(ngrid,psolaralb,1),1) |
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454 | |
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455 | ENDIF |
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456 | |
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457 | c changing initial albedo if CO2 ice is present |
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458 | c ------------------------------------------- |
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459 | |
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460 | DO ig=1,ngrid |
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461 | IF (piceco2(ig) .GT. 0.) THEN |
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462 | IF(ig.GT.ngrid/2+1) THEN |
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463 | icap=2 |
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464 | ELSE |
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465 | icap=1 |
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466 | ENDIF |
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467 | psolaralb(ig,1) = albedice(icap) |
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468 | psolaralb(ig,2) = albedice(icap) |
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469 | END IF |
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470 | END DO |
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471 | |
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472 | c changing initial albedo if water ice frost is present |
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473 | c ------------------------------------------- |
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474 | IF (water) THEN |
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475 | do iq=1,nqmx |
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476 | c if there is frost and surface albedo is set to albedo_h2o_ice |
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477 | if(noms(iq).eq."h2o_ice") then |
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478 | do ig=1,ngrid |
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479 | |
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480 | if ((watercaptag(ig).eqv..false.) |
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481 | & .and. (qsurf(ig,iq).lt.-frost_albedo_threshold)) then |
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482 | print*, '' |
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483 | print*, '!!! PROBLEM in SURFINI !!!!' |
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484 | print*, 'FOUND NEGATIVE SURFACE ICE VALUE WHERE |
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485 | & WATERCAPTAG IS FALSE' |
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486 | print*, '' |
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487 | print*, 'ig,qsurf,threshold' , |
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488 | & ig, qsurf(ig,iq), -frost_albedo_threshold |
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489 | print*, '' |
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490 | print*, '1) Check h2o_ice in startfi and ice |
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491 | & distribution in surfini' |
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492 | print*, '2) Use ini_h2osurf option in newstart' |
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493 | print*, '' |
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494 | CALL ABORT |
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495 | endif |
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496 | |
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497 | if ((piceco2(ig) .eq. 0.).and. |
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498 | & (qsurf(ig,iq).gt.frost_albedo_threshold)) then |
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499 | psolaralb(ig,1) = albedo_h2o_ice |
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500 | psolaralb(ig,2) = albedo_h2o_ice |
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501 | c PRINT*,'surfini.F frost', |
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502 | c & lati(ig)*180./pi, long(ig)*180./pi |
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503 | endif |
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504 | enddo |
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505 | endif |
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506 | end do |
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507 | PRINT*,'minimum albedo avec givre et co2', |
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508 | s psolaralb(ISMIN(ngrid,psolaralb,1),1) |
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509 | PRINT*,'maximum albedo avec givre et co2', |
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510 | s psolaralb(ISMAX(ngrid,psolaralb,1),1) |
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511 | END IF |
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512 | |
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513 | RETURN |
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514 | END |
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