1 | ! This subroutine calculates: |
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2 | ! 1-6 : leaf senescence, climatic and as a function of leaf age. New LAI. |
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3 | ! 7 : herbivores |
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4 | ! 8 : fruit turnover for trees. |
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5 | ! 9 : sapwood conversion. |
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6 | ! |
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7 | ! $Header: /home/ssipsl/CVSREP/ORCHIDEE/src_stomate/stomate_turnover.f90,v 1.13 2010/04/06 15:44:01 ssipsl Exp $ |
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8 | ! IPSL (2006) |
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9 | ! This software is governed by the CeCILL licence see ORCHIDEE/ORCHIDEE_CeCILL.LIC |
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10 | ! |
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11 | MODULE stomate_turnover |
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12 | |
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13 | ! modules used: |
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14 | |
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15 | USE ioipsl |
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16 | USE stomate_constants |
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17 | USE constantes_veg |
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18 | |
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19 | IMPLICIT NONE |
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20 | |
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21 | ! private & public routines |
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22 | |
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23 | PRIVATE |
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24 | PUBLIC turn, turn_clear |
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25 | |
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26 | ! first call |
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27 | LOGICAL, SAVE :: firstcall = .TRUE. |
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28 | |
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29 | CONTAINS |
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30 | |
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31 | SUBROUTINE turn_clear |
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32 | firstcall=.TRUE. |
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33 | END SUBROUTINE turn_clear |
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34 | |
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35 | SUBROUTINE turn (npts, dt, PFTpresent, & |
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36 | herbivores, & |
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37 | maxmoiavail_lastyear, minmoiavail_lastyear, & |
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38 | moiavail_week, moiavail_month, tlong_ref, t2m_month, t2m_week, veget_max, & |
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39 | leaf_age, leaf_frac, age, lai, biomass, & |
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40 | turnover, senescence,turnover_time) |
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41 | |
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42 | ! |
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43 | ! 0 declarations |
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44 | ! |
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45 | |
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46 | ! 0.1 input |
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47 | |
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48 | ! Domain size |
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49 | INTEGER(i_std), INTENT(in) :: npts |
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50 | ! time step in days |
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51 | REAL(r_std), INTENT(in) :: dt |
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52 | ! PFT exists |
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53 | LOGICAL, DIMENSION(npts,nvm), INTENT(in) :: PFTpresent |
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54 | ! time constant of probability of a leaf to be eaten by a herbivore (days) |
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55 | REAL(r_std), DIMENSION(npts,nvm), INTENT(in) :: herbivores |
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56 | ! last year's maximum moisture availability |
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57 | REAL(r_std), DIMENSION(npts,nvm), INTENT(in) :: maxmoiavail_lastyear |
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58 | ! last year's minimum moisture availability |
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59 | REAL(r_std), DIMENSION(npts,nvm), INTENT(in) :: minmoiavail_lastyear |
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60 | ! "weekly" moisture availability |
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61 | REAL(r_std), DIMENSION(npts,nvm), INTENT(in) :: moiavail_week |
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62 | ! "monthly" moisture availability |
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63 | REAL(r_std), DIMENSION(npts,nvm), INTENT(in) :: moiavail_month |
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64 | ! "long term" 2 meter reference temperatures (K) |
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65 | REAL(r_std), DIMENSION(npts), INTENT(in) :: tlong_ref |
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66 | ! "monthly" 2-meter temperatures (K) |
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67 | REAL(r_std), DIMENSION(npts), INTENT(in) :: t2m_month |
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68 | ! "weekly" 2 meter temperatures (K) |
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69 | REAL(r_std), DIMENSION(npts), INTENT(in) :: t2m_week |
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70 | ! "maximal" coverage fraction of a PFT (LAI -> infinity) on ground |
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71 | REAL(r_std), DIMENSION(npts,nvm), INTENT(in) :: veget_max |
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72 | |
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73 | ! 0.2 modified fields |
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74 | |
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75 | ! age of the leaves (days) |
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76 | REAL(r_std), DIMENSION(npts,nvm,nleafages), INTENT(inout) :: leaf_age |
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77 | ! fraction of leaves in leaf age class |
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78 | REAL(r_std), DIMENSION(npts,nvm,nleafages), INTENT(inout) :: leaf_frac |
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79 | ! age (years) |
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80 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: age |
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81 | ! leaf area index |
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82 | REAL(r_std), DIMENSION(npts,nvm), INTENT(in) :: lai |
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83 | ! biomass (gC/(m**2 of ground)) |
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84 | REAL(r_std), DIMENSION(npts,nvm,nparts), INTENT(inout) :: biomass |
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85 | ! turnover_time of grasse |
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86 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: turnover_time |
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87 | |
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88 | ! 0.3 output |
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89 | |
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90 | ! Turnover rates (gC/day/(m**2 of ground)) |
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91 | REAL(r_std), DIMENSION(npts,nvm,nparts), INTENT(out) :: turnover |
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92 | ! is the plant senescent? |
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93 | ! (interesting only for deciduous trees: carbohydrate reserve) |
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94 | LOGICAL, DIMENSION(npts,nvm), INTENT(out) :: senescence |
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95 | |
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96 | ! 0.4 local |
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97 | |
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98 | !!$ ! minimum leaf age for senescence (d) |
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99 | !!$ REAL(r_std), PARAMETER :: min_leaf_age = 30. |
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100 | ! mean age of the leaves (days) |
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101 | REAL(r_std), DIMENSION(npts,nvm) :: leaf_meanage |
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102 | ! Intermediate variable for turnover |
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103 | REAL(r_std), DIMENSION(npts) :: dturnover |
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104 | ! critical moisture availability, function of last year's moisture availability |
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105 | REAL(r_std), DIMENSION(npts) :: moiavail_crit |
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106 | ! long term annual mean temperature, C |
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107 | REAL(r_std), DIMENSION(npts) :: tl |
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108 | ! critical senescence temperature, function of long term annual temperature (K) |
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109 | REAL(r_std), DIMENSION(npts) :: t_crit |
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110 | ! shed the remaining leaves? |
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111 | LOGICAL, DIMENSION(npts) :: shed_rest |
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112 | ! Sapwood conversion (gC/day(m**2 of ground)) |
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113 | REAL(r_std), DIMENSION(npts) :: sapconv |
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114 | ! old heartwood mass (gC/(m**2 of ground)) |
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115 | REAL(r_std), DIMENSION(npts) :: hw_old |
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116 | ! new heartwood mass (gC/(m**2 of ground)) |
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117 | REAL(r_std), DIMENSION(npts) :: hw_new |
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118 | ! old leaf mass (gC/(m**2 of ground)) |
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119 | REAL(r_std), DIMENSION(npts) :: lm_old |
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120 | ! leaf mass change for each age class |
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121 | REAL(r_std), DIMENSION(npts,nleafages) :: delta_lm |
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122 | ! turnover rate |
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123 | REAL(r_std), DIMENSION(npts) :: turnover_rate |
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124 | ! critical leaf age (d) |
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125 | REAL(r_std), DIMENSION(npts,nvm) :: leaf_age_crit |
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126 | ! instantaneous turnover time |
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127 | REAL(r_std), DIMENSION(npts,nvm) :: new_turnover_time |
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128 | ! Index |
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129 | INTEGER(i_std) :: j,m |
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130 | |
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131 | ! ========================================================================= |
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132 | |
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133 | IF (bavard.GE.3) WRITE(numout,*) 'Entering turnover' |
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134 | |
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135 | ! |
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136 | ! 1 messages |
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137 | ! |
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138 | |
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139 | IF ( firstcall ) THEN |
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140 | |
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141 | WRITE(numout,*) 'turnover:' |
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142 | |
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143 | WRITE(numout,*) ' > minimum mean leaf age for senescence (d): ',pheno_crit%min_leaf_age_for_senescence |
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144 | |
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145 | firstcall = .FALSE. |
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146 | |
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147 | |
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148 | ENDIF |
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149 | |
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150 | ! |
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151 | ! 2 Initializations |
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152 | ! |
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153 | |
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154 | ! |
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155 | ! 2.1 set output to zero |
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156 | ! |
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157 | |
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158 | turnover(:,:,:) = zero |
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159 | new_turnover_time=zero |
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160 | senescence(:,:) = .FALSE. |
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161 | |
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162 | ! |
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163 | ! 2.2 mean leaf age. Should actually be recalculated at the end of this routine, |
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164 | ! but it does not change too fast. |
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165 | ! |
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166 | |
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167 | leaf_meanage(:,:) = 0.0 |
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168 | |
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169 | DO m = 1, nleafages |
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170 | leaf_meanage(:,:) = leaf_meanage(:,:) + leaf_age(:,:,m) * leaf_frac(:,:,m) |
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171 | ENDDO |
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172 | |
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173 | ! |
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174 | ! 3 different types of "climatic" leaf senescence |
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175 | ! does not change age structure. |
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176 | ! |
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177 | |
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178 | DO j = 2,nvm |
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179 | |
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180 | ! |
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181 | ! 3.1 determine if there is climatic senescence |
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182 | ! |
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183 | |
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184 | SELECT CASE ( pheno_crit%senescence_type(j) ) |
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185 | |
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186 | CASE ( 'cold' ) |
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187 | |
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188 | ! 3.1.1 summergreen species: |
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189 | ! monthly temperature low and temperature tendency negative ? |
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190 | |
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191 | ! critical temperature for senescence may depend on long term annual mean temperature |
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192 | tl(:) = tlong_ref(:) - ZeroCelsius |
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193 | t_crit(:) = ZeroCelsius + pheno_crit%senescence_temp(j,1) + & |
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194 | tl(:) * pheno_crit%senescence_temp(j,2) + & |
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195 | tl(:)*tl(:) * pheno_crit%senescence_temp(j,3) |
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196 | |
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197 | WHERE ( ( biomass(:,j,ileaf) .GT. zero ) .AND. & |
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198 | ( leaf_meanage(:,j) .GT. pheno_crit%min_leaf_age_for_senescence(j) ) .AND. & |
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199 | ( t2m_month(:) .LT. t_crit(:) ) .AND. ( t2m_week(:) .LT. t2m_month(:) ) ) |
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200 | |
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201 | senescence(:,j) = .TRUE. |
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202 | |
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203 | ENDWHERE |
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204 | |
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205 | CASE ( 'dry' ) |
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206 | |
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207 | ! 3.1.2 raingreen species: |
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208 | ! does moisture availability drop below critical level? |
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209 | |
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210 | moiavail_crit(:) = & |
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211 | MIN( MAX( minmoiavail_lastyear(:,j) + pheno_crit%hum_frac(j) * & |
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212 | ( maxmoiavail_lastyear(:,j) - minmoiavail_lastyear(:,j) ), & |
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213 | pheno_crit%senescence_hum(j) ), & |
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214 | pheno_crit%nosenescence_hum(j) ) |
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215 | |
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216 | WHERE ( ( biomass(:,j,ileaf) .GT. zero ) .AND. & |
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217 | ( leaf_meanage(:,j) .GT. pheno_crit%min_leaf_age_for_senescence(j) ) .AND. & |
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218 | ( moiavail_week(:,j) .LT. moiavail_crit(:) ) ) |
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219 | |
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220 | senescence(:,j) = .TRUE. |
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221 | |
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222 | ENDWHERE |
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223 | |
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224 | CASE ( 'mixed' ) |
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225 | |
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226 | ! 3.1.3 mixed criterion: |
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227 | ! moisture availability drops below critical level, or |
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228 | ! monthly temperature low and temperature tendency negative |
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229 | moiavail_crit(:) = & |
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230 | MIN( MAX( minmoiavail_lastyear(:,j) + pheno_crit%hum_frac(j) * & |
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231 | ( maxmoiavail_lastyear(:,j) - minmoiavail_lastyear(:,j) ), & |
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232 | pheno_crit%senescence_hum(j) ), & |
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233 | pheno_crit%nosenescence_hum(j) ) |
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234 | tl(:) = tlong_ref(:) - ZeroCelsius |
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235 | t_crit(:) = ZeroCelsius + pheno_crit%senescence_temp(j,1) + & |
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236 | tl(:) * pheno_crit%senescence_temp(j,2) + & |
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237 | tl(:)*tl(:) * pheno_crit%senescence_temp(j,3) |
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238 | IF ( tree(j) ) THEN |
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239 | |
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240 | ! critical temperature for senescence may depend on long term annual mean temperature |
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241 | WHERE ( ( biomass(:,j,ileaf) .GT. zero ) .AND. & |
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242 | ( leaf_meanage(:,j) .GT. pheno_crit%min_leaf_age_for_senescence(j) ) .AND. & |
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243 | ( ( moiavail_week(:,j) .LT. moiavail_crit(:) ) .OR. & |
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244 | ( ( t2m_month(:) .LT. t_crit(:) ) .AND. ( t2m_week(:) .LT. t2m_month(:) ) ) ) ) |
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245 | senescence(:,j) = .TRUE. |
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246 | ENDWHERE |
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247 | ELSE |
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248 | new_turnover_time(:,j)=pheno_crit%max_turnover_time(j)+20 |
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249 | WHERE ((moiavail_week(:,j) .LT. moiavail_month(:,j))& |
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250 | .AND. (moiavail_week(:,j) .LT. pheno_crit%nosenescence_hum(j))) |
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251 | new_turnover_time(:,j)=pheno_crit%max_turnover_time(j) * & |
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252 | (1.-pheno_crit%nosenescence_hum(j)+moiavail_week(:,j)) * & |
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253 | (1.-pheno_crit%nosenescence_hum(j)+moiavail_week(:,j)) + & |
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254 | pheno_crit%min_turnover_time(j) |
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255 | ! new_turnover_time(:,j)=pheno_crit%max_turnover_time(j) * & |
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256 | ! moiavail_week(:,j)/ pheno_crit%nosenescence_hum(j) + & |
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257 | ! pheno_crit%min_turnover_time(j) |
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258 | ENDWHERE |
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259 | ! WHERE ((t2m_month(:) .LT. t_crit(:)+5) .AND. ( t2m_week(:) .LT. t2m_month(:) )) |
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260 | ! new_turnover_time(:,j)=new_turnover_time(:,j)*((t2m_month(:)-t_crit(:))/5*0.4+0.6) |
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261 | ! ENDWHERE |
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262 | ! WHERE (new_turnover_time(:,j) .LT. pheno_crit%min_turnover_time(j)) |
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263 | ! new_turnover_time(:,j)=pheno_crit%min_turnover_time(j) |
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264 | ! ENDWHERE |
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265 | |
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266 | WHERE (new_turnover_time(:,j) .GT. turnover_time(:,j)*1.1) |
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267 | new_turnover_time(:,j)=pheno_crit%max_turnover_time(j)+20 |
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268 | ENDWHERE |
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269 | !!$ WHERE ( ( t2m_month(:) .LT. t_crit(:) ) .AND. ( t2m_week(:) .LT. t2m_month(:) ) & |
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270 | !!$ & .AND. ( leaf_meanage(:,j) .GT. pheno_crit%min_leaf_age_for_senescence(j) )) |
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271 | !!$ new_turnover_time(:,j)=pheno_crit%min_turnover_time(j) |
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272 | !!$ ENDWHERE |
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273 | ! print *,'t_crit=',t_crit |
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274 | |
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275 | |
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276 | turnover_time(:,j)=(turnover_time(:,j)*10./dt+new_turnover_time(:,j))/(10./dt+1.) |
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277 | |
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278 | ENDIF |
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279 | |
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280 | CASE ( 'none' ) |
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281 | |
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282 | ! evergreen species: no climatic senescence |
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283 | |
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284 | CASE default |
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285 | |
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286 | WRITE(numout,*) 'turnover: don''t know how to treat this PFT.' |
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287 | WRITE(numout,*) ' number: ',j |
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288 | WRITE(numout,*) ' senescence type: ',pheno_crit%senescence_type(j) |
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289 | STOP |
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290 | |
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291 | END SELECT |
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292 | |
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293 | ! |
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294 | ! 3.2 drop leaves and roots, plus stems and fruits for grasses |
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295 | ! |
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296 | |
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297 | IF ( tree(j) ) THEN |
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298 | |
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299 | ! 3.2.1 trees |
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300 | |
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301 | WHERE ( senescence(:,j) ) |
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302 | |
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303 | turnover(:,j,ileaf) = biomass(:,j,ileaf) * dt / pheno_crit%leaffall(j) |
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304 | turnover(:,j,iroot) = biomass(:,j,iroot) * dt / pheno_crit%leaffall(j) |
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305 | |
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306 | biomass(:,j,ileaf) = biomass(:,j,ileaf) - turnover(:,j,ileaf) |
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307 | biomass(:,j,iroot) = biomass(:,j,iroot) - turnover(:,j,iroot) |
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308 | |
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309 | ENDWHERE |
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310 | |
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311 | ELSE |
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312 | |
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313 | ! 3.2.2 grasses |
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314 | WHERE (turnover_time(:,j) .LT. pheno_crit%max_turnover_time(j)) |
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315 | turnover(:,j,ileaf) = biomass(:,j,ileaf) * dt / turnover_time(:,j) |
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316 | turnover(:,j,isapabove) = biomass(:,j,isapabove) * dt / turnover_time(:,j) |
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317 | turnover(:,j,iroot) = biomass(:,j,iroot) * dt / turnover_time(:,j) |
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318 | turnover(:,j,ifruit) = biomass(:,j,ifruit) * dt / turnover_time(:,j) |
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319 | ELSEWHERE |
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320 | turnover(:,j,ileaf)=zero |
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321 | turnover(:,j,isapabove) =zero |
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322 | turnover(:,j,iroot) = zero |
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323 | turnover(:,j,ifruit) =zero |
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324 | ENDWHERE |
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325 | biomass(:,j,ileaf) = biomass(:,j,ileaf) - turnover(:,j,ileaf) |
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326 | biomass(:,j,isapabove) = biomass(:,j,isapabove) - turnover(:,j,isapabove) |
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327 | biomass(:,j,iroot) = biomass(:,j,iroot) - turnover(:,j,iroot) |
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328 | biomass(:,j,ifruit) = biomass(:,j,ifruit) - turnover(:,j,ifruit) |
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329 | |
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330 | ENDIF ! tree/grass |
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331 | |
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332 | ENDDO ! loop over PFTs |
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333 | |
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334 | ! |
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335 | ! 4 At a certain age, leaves fall off, even if the climate would allow a green plant |
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336 | ! all year round. |
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337 | ! Decay rate varies with leaf age. |
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338 | ! Roots, fruits (and stems) follow leaves. |
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339 | ! Note that plant is not declared senescent in this case (important for allocation: |
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340 | ! if the plant loses leaves because of their age, it can renew them). |
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341 | ! |
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342 | |
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343 | DO j = 2,nvm |
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344 | |
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345 | ! save old leaf mass |
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346 | lm_old(:) = biomass(:,j,ileaf) |
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347 | |
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348 | ! initialize leaf mass change in age class |
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349 | delta_lm(:,:) = 0.0 |
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350 | |
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351 | IF ( tree(j) ) THEN |
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352 | |
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353 | ! |
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354 | ! 4.1 trees: leaves, roots, fruits |
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355 | ! roots and fruits follow leaves. |
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356 | ! |
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357 | |
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358 | ! 4.1.1 critical age: prescribed for trees |
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359 | |
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360 | leaf_age_crit(:,j) = pheno_crit%leafagecrit(j) |
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361 | |
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362 | ! 4.1.2 loop over leaf age classes |
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363 | |
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364 | DO m = 1, nleafages |
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365 | turnover_rate(:) = zero |
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366 | WHERE ( leaf_age(:,j,m) .GT. leaf_age_crit(:,j)/2. ) |
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367 | |
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368 | turnover_rate(:) = & |
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369 | MIN( 0.99_r_std, dt / ( leaf_age_crit(:,j) * & |
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370 | ( leaf_age_crit(:,j) / leaf_age(:,j,m) )**4._r_std ) ) |
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371 | |
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372 | dturnover(:) = biomass(:,j,ileaf) * leaf_frac(:,j,m) * turnover_rate(:) |
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373 | turnover(:,j,ileaf) = turnover(:,j,ileaf) + dturnover(:) |
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374 | biomass(:,j,ileaf) = biomass(:,j,ileaf) - dturnover(:) |
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375 | |
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376 | ! save leaf mass change |
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377 | delta_lm(:,m) = - dturnover(:) |
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378 | |
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379 | dturnover(:) = biomass(:,j,iroot) * leaf_frac(:,j,m) * turnover_rate(:) |
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380 | turnover(:,j,iroot) = turnover(:,j,iroot) + dturnover(:) |
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381 | biomass(:,j,iroot) = biomass(:,j,iroot) - dturnover(:) |
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382 | |
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383 | dturnover(:) = biomass(:,j,ifruit) * leaf_frac(:,j,m) * turnover_rate(:) |
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384 | turnover(:,j,ifruit) = turnover(:,j,ifruit) + dturnover(:) |
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385 | biomass(:,j,ifruit) = biomass(:,j,ifruit) - dturnover(:) |
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386 | |
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387 | ENDWHERE |
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388 | |
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389 | ENDDO |
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390 | |
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391 | ELSE |
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392 | |
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393 | ! |
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394 | ! 4.2 grasses: leaves, roots, fruits, sap. |
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395 | ! roots, fruits, and sap follow leaves. |
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396 | ! |
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397 | |
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398 | ! 4.2.1 critical leaf age depends on long-term temperature: |
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399 | ! generally, lower turnover in cooler climates. |
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400 | |
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401 | leaf_age_crit(:,j) = & |
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402 | MIN( pheno_crit%leafagecrit(j) * 1.5_r_std , & |
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403 | MAX( pheno_crit%leafagecrit(j) * 0.75_r_std, & |
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404 | pheno_crit%leafagecrit(j) - 10._r_std * & |
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405 | ( tlong_ref(:)-ZeroCelsius-20._r_std ) ) ) |
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406 | |
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407 | ! 4.2.2 loop over leaf age classes |
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408 | |
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409 | DO m = 1, nleafages |
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410 | |
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411 | WHERE ( leaf_age(:,j,m) .GT. leaf_age_crit(:,j)/2. ) |
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412 | |
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413 | turnover_rate(:) = & |
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414 | MIN( 0.99_r_std, dt / ( leaf_age_crit(:,j) * & |
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415 | ( leaf_age_crit(:,j) / leaf_age(:,j,m) )**4._r_std ) ) |
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416 | |
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417 | dturnover(:) = biomass(:,j,ileaf) * leaf_frac(:,j,m) * turnover_rate(:) |
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418 | turnover(:,j,ileaf) = turnover(:,j,ileaf) + dturnover(:) |
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419 | biomass(:,j,ileaf) = biomass(:,j,ileaf) - dturnover(:) |
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420 | |
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421 | ! save leaf mass change |
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422 | delta_lm(:,m) = - dturnover(:) |
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423 | |
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424 | dturnover(:) = biomass(:,j,isapabove) * leaf_frac(:,j,m) * turnover_rate(:) |
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425 | turnover(:,j,isapabove) = turnover(:,j,isapabove) + dturnover(:) |
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426 | biomass(:,j,isapabove) = biomass(:,j,isapabove) - dturnover(:) |
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427 | |
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428 | dturnover(:) = biomass(:,j,iroot) * leaf_frac(:,j,m) * turnover_rate(:) |
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429 | turnover(:,j,iroot) = turnover(:,j,iroot) + dturnover(:) |
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430 | biomass(:,j,iroot) = biomass(:,j,iroot) - dturnover(:) |
---|
431 | |
---|
432 | dturnover(:) = biomass(:,j,ifruit) * leaf_frac(:,j,m) * turnover_rate(:) |
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433 | turnover(:,j,ifruit) = turnover(:,j,ifruit) + dturnover(:) |
---|
434 | biomass(:,j,ifruit) = biomass(:,j,ifruit) - dturnover(:) |
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435 | |
---|
436 | ENDWHERE |
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437 | |
---|
438 | |
---|
439 | ENDDO |
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440 | |
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441 | ENDIF ! tree/grass ? |
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442 | |
---|
443 | ! |
---|
444 | ! 4.3 recalculate fraction in each leaf age class |
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445 | ! new fraction = new leaf mass of that fraction / new total leaf mass |
---|
446 | ! = ( old fraction*old total leaf mass + biomass change of that fraction ) / |
---|
447 | ! new total leaf mass |
---|
448 | ! |
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449 | |
---|
450 | DO m = 1, nleafages |
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451 | |
---|
452 | WHERE ( biomass(:,j,ileaf) .GT. 0.0 ) |
---|
453 | leaf_frac(:,j,m) = ( leaf_frac(:,j,m)*lm_old(:) + delta_lm(:,m) ) / biomass(:,j,ileaf) |
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454 | ELSEWHERE |
---|
455 | leaf_frac(:,j,m) = zero |
---|
456 | ENDWHERE |
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457 | |
---|
458 | ENDDO |
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459 | |
---|
460 | ENDDO ! loop over PFTs |
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461 | |
---|
462 | ! |
---|
463 | ! 5 new (provisional) lai |
---|
464 | ! |
---|
465 | |
---|
466 | ! lai(:,ibare_sechiba) = zero |
---|
467 | ! DO j = 2, nvm |
---|
468 | ! lai(:,j) = biomass(:,j,ileaf) * sla(j) |
---|
469 | ! ENDDO |
---|
470 | |
---|
471 | ! |
---|
472 | ! 6 definitely drop leaves if very low leaf mass during senescence. |
---|
473 | ! Also drop fruits and loose fine roots. |
---|
474 | ! Set lai to zero if necessary |
---|
475 | ! Check whether leaf regrowth is immediately allowed. |
---|
476 | ! |
---|
477 | |
---|
478 | DO j = 2,nvm |
---|
479 | |
---|
480 | shed_rest(:) = .FALSE. |
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481 | |
---|
482 | ! |
---|
483 | ! 6.1 deciduous trees |
---|
484 | ! |
---|
485 | |
---|
486 | IF ( tree(j) .AND. ( pheno_crit%senescence_type(j) .NE. 'none' ) ) THEN |
---|
487 | |
---|
488 | ! check whether we shed the remaining leaves |
---|
489 | |
---|
490 | WHERE ( ( biomass(:,j,ileaf) .GT. zero ) .AND. senescence(:,j) .AND. & |
---|
491 | ( biomass(:,j,ileaf) .LT. (pheno_crit%lai_initmin(j) / 2.)/sla(j) ) ) |
---|
492 | |
---|
493 | shed_rest(:) = .TRUE. |
---|
494 | |
---|
495 | turnover(:,j,ileaf) = turnover(:,j,ileaf) + biomass(:,j,ileaf) |
---|
496 | turnover(:,j,iroot) = turnover(:,j,iroot) + biomass(:,j,iroot) |
---|
497 | turnover(:,j,ifruit) = turnover(:,j,ifruit) + biomass(:,j,ifruit) |
---|
498 | |
---|
499 | biomass(:,j,ileaf) = zero |
---|
500 | biomass(:,j,iroot) = zero |
---|
501 | biomass(:,j,ifruit) = zero |
---|
502 | |
---|
503 | |
---|
504 | |
---|
505 | ! reset leaf age |
---|
506 | leaf_meanage(:,j) = zero |
---|
507 | |
---|
508 | ENDWHERE |
---|
509 | |
---|
510 | ENDIF |
---|
511 | |
---|
512 | ! |
---|
513 | ! 6.2 grasses: also convert stems |
---|
514 | ! |
---|
515 | |
---|
516 | IF ( .NOT. tree(j) ) THEN |
---|
517 | |
---|
518 | ! Shed the remaining leaves if LAI very low. |
---|
519 | |
---|
520 | WHERE ( ( biomass(:,j,ileaf) .GT. zero ) .AND. senescence(:,j) .AND. & |
---|
521 | ( biomass(:,j,ileaf) .LT. (pheno_crit%lai_initmin(j) / 2.)/sla(j) )) |
---|
522 | |
---|
523 | shed_rest(:) = .TRUE. |
---|
524 | |
---|
525 | turnover(:,j,ileaf) = turnover(:,j,ileaf) + biomass(:,j,ileaf) |
---|
526 | turnover(:,j,isapabove) = turnover(:,j,isapabove) + biomass(:,j,isapabove) |
---|
527 | turnover(:,j,iroot) = turnover(:,j,iroot) + biomass(:,j,iroot) |
---|
528 | turnover(:,j,ifruit) = turnover(:,j,ifruit) + biomass(:,j,ifruit) |
---|
529 | |
---|
530 | biomass(:,j,ileaf) = zero |
---|
531 | biomass(:,j,isapabove) = zero |
---|
532 | biomass(:,j,iroot) = zero |
---|
533 | biomass(:,j,ifruit) = zero |
---|
534 | |
---|
535 | |
---|
536 | |
---|
537 | ! reset leaf age |
---|
538 | leaf_meanage(:,j) = zero |
---|
539 | |
---|
540 | ENDWHERE |
---|
541 | |
---|
542 | ENDIF |
---|
543 | |
---|
544 | ! |
---|
545 | ! 6.3 reset leaf age structure |
---|
546 | ! |
---|
547 | |
---|
548 | DO m = 1, nleafages |
---|
549 | |
---|
550 | WHERE ( shed_rest(:) ) |
---|
551 | |
---|
552 | leaf_age(:,j,m) = zero |
---|
553 | leaf_frac(:,j,m) = zero |
---|
554 | |
---|
555 | ENDWHERE |
---|
556 | |
---|
557 | ENDDO |
---|
558 | |
---|
559 | ENDDO |
---|
560 | |
---|
561 | ! |
---|
562 | ! 7 Elephants, cows, gazelles. No lions. |
---|
563 | ! Does not modify leaf age structure. |
---|
564 | ! |
---|
565 | |
---|
566 | IF ( ok_herbivores ) THEN |
---|
567 | |
---|
568 | ! herbivore activity allowed. Eat when there are leaves. Otherwise, |
---|
569 | ! there won't be many fruits anyway. |
---|
570 | |
---|
571 | DO j = 2,nvm |
---|
572 | |
---|
573 | IF ( tree(j) ) THEN |
---|
574 | |
---|
575 | ! trees: only leaves and fruits are affected |
---|
576 | |
---|
577 | WHERE ( biomass(:,j,ileaf) .GT. zero ) |
---|
578 | ! added by shilong |
---|
579 | WHERE (herbivores(:,j).GT. zero) |
---|
580 | dturnover(:) = biomass(:,j,ileaf) * dt / herbivores(:,j) |
---|
581 | turnover(:,j,ileaf) = turnover(:,j,ileaf) + dturnover(:) |
---|
582 | biomass(:,j,ileaf) = biomass(:,j,ileaf) - dturnover(:) |
---|
583 | |
---|
584 | dturnover(:) = biomass(:,j,ifruit) * dt / herbivores(:,j) |
---|
585 | turnover(:,j,ifruit) = turnover(:,j,ifruit) + dturnover(:) |
---|
586 | biomass(:,j,ifruit) = biomass(:,j,ifruit) - dturnover(:) |
---|
587 | ENDWHERE |
---|
588 | ENDWHERE |
---|
589 | |
---|
590 | ELSE |
---|
591 | |
---|
592 | ! grasses: the whole biomass above the ground: leaves, fruits, stems |
---|
593 | |
---|
594 | WHERE ( biomass(:,j,ileaf) .GT. zero ) |
---|
595 | ! added by shilong |
---|
596 | WHERE (herbivores(:,j) .GT. zero) |
---|
597 | dturnover(:) = biomass(:,j,ileaf) * dt / herbivores(:,j) |
---|
598 | turnover(:,j,ileaf) = turnover(:,j,ileaf) + dturnover(:) |
---|
599 | biomass(:,j,ileaf) = biomass(:,j,ileaf) - dturnover(:) |
---|
600 | |
---|
601 | dturnover(:) = biomass(:,j,isapabove) * dt / herbivores(:,j) |
---|
602 | turnover(:,j,isapabove) = turnover(:,j,isapabove) + dturnover(:) |
---|
603 | biomass(:,j,isapabove) = biomass(:,j,isapabove) - dturnover(:) |
---|
604 | |
---|
605 | dturnover(:) = biomass(:,j,ifruit) * dt / herbivores(:,j) |
---|
606 | turnover(:,j,ifruit) = turnover(:,j,ifruit) + dturnover(:) |
---|
607 | biomass(:,j,ifruit) = biomass(:,j,ifruit) - dturnover(:) |
---|
608 | ENDWHERE |
---|
609 | |
---|
610 | ENDWHERE |
---|
611 | |
---|
612 | ENDIF ! tree/grass? |
---|
613 | |
---|
614 | ENDDO ! loop over PFTs |
---|
615 | |
---|
616 | ENDIF |
---|
617 | |
---|
618 | ! |
---|
619 | ! 8 fruit turnover for trees |
---|
620 | ! |
---|
621 | |
---|
622 | DO j = 2,nvm |
---|
623 | |
---|
624 | IF ( tree(j) ) THEN |
---|
625 | |
---|
626 | !SZ correction of a mass destroying bug |
---|
627 | dturnover(:) = biomass(:,j,ifruit) * dt / tau_fruit(j) |
---|
628 | turnover(:,j,ifruit) = turnover(:,j,ifruit) + dturnover(:) |
---|
629 | biomass(:,j,ifruit) = biomass(:,j,ifruit) - dturnover(:) |
---|
630 | !!$ turnover(:,j,ifruit) = biomass(:,j,ifruit) * dt / tau_fruit(j) |
---|
631 | !!$ biomass(:,j,ifruit) = biomass(:,j,ifruit) - turnover(:,j,ifruit) |
---|
632 | |
---|
633 | ENDIF |
---|
634 | |
---|
635 | ENDDO |
---|
636 | |
---|
637 | ! |
---|
638 | ! 9 Conversion of sapwood to heartwood |
---|
639 | ! This is not added to "turnover" as the biomass is not lost! |
---|
640 | ! |
---|
641 | |
---|
642 | DO j = 2,nvm |
---|
643 | |
---|
644 | IF ( tree(j) ) THEN |
---|
645 | |
---|
646 | ! for age calculations |
---|
647 | |
---|
648 | IF ( .NOT. control%ok_dgvm ) THEN |
---|
649 | hw_old(:) = biomass(:,j,iheartabove) + biomass(:,j,iheartbelow) |
---|
650 | ENDIF |
---|
651 | |
---|
652 | ! |
---|
653 | ! 9.1 Calculate the rate of conversion and update masses |
---|
654 | ! |
---|
655 | |
---|
656 | ! above the ground |
---|
657 | |
---|
658 | sapconv(:) = biomass(:,j,isapabove) * dt / tau_sap(j) |
---|
659 | biomass(:,j,isapabove) = biomass(:,j,isapabove) - sapconv(:) |
---|
660 | biomass(:,j,iheartabove) = biomass(:,j,iheartabove) + sapconv(:) |
---|
661 | |
---|
662 | ! below the ground |
---|
663 | |
---|
664 | sapconv(:) = biomass(:,j,isapbelow) * dt / tau_sap(j) |
---|
665 | biomass(:,j,isapbelow) = biomass(:,j,isapbelow) - sapconv(:) |
---|
666 | biomass(:,j,iheartbelow) = biomass(:,j,iheartbelow) + sapconv(:) |
---|
667 | |
---|
668 | |
---|
669 | ! |
---|
670 | ! 9.2 If vegetation is not dynamic, identify the age of the heartwood |
---|
671 | ! to the age of the whole tree (otherwise, the age of the tree is |
---|
672 | ! treated in the establishment routine). |
---|
673 | ! Creation of new heartwood decreases the age of the plant. |
---|
674 | ! |
---|
675 | |
---|
676 | IF ( .NOT. control%ok_dgvm ) THEN |
---|
677 | |
---|
678 | hw_new(:) = biomass(:,j,iheartabove) + biomass(:,j,iheartbelow) |
---|
679 | |
---|
680 | WHERE ( hw_new(:) .GT. zero ) |
---|
681 | |
---|
682 | age(:,j) = age(:,j) * hw_old(:)/hw_new(:) |
---|
683 | |
---|
684 | ENDWHERE |
---|
685 | |
---|
686 | ENDIF |
---|
687 | |
---|
688 | ENDIF |
---|
689 | |
---|
690 | ENDDO |
---|
691 | |
---|
692 | ! |
---|
693 | ! history |
---|
694 | ! |
---|
695 | |
---|
696 | CALL histwrite (hist_id_stomate, 'LEAF_AGE', itime, & |
---|
697 | leaf_meanage, npts*nvm, horipft_index) |
---|
698 | CALL histwrite (hist_id_stomate, 'HERBIVORES', itime, & |
---|
699 | herbivores, npts*nvm, horipft_index) |
---|
700 | |
---|
701 | IF (bavard.GE.4) WRITE(numout,*) 'Leaving turnover' |
---|
702 | |
---|
703 | END SUBROUTINE turn |
---|
704 | |
---|
705 | END MODULE stomate_turnover |
---|