1 | !< $HeadURL$ |
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2 | !< $Date$ |
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3 | !< $Author$ |
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4 | !< $Revision$ |
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5 | !IPSL (2006) |
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6 | ! This software is governed by the CeCILL licence see ORCHIDEE/ORCHIDEE_CeCILL.LIC |
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7 | |
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8 | ! calculate maintenance respiration on an hourly time step (NV 14/5/2002) |
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9 | MODULE stomate_resp |
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10 | ! modules used: |
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11 | USE stomate_data |
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12 | USE pft_parameters |
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13 | USE constantes |
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14 | |
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15 | IMPLICIT NONE |
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16 | |
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17 | ! private & public routines |
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18 | |
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19 | PRIVATE |
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20 | PUBLIC maint_respiration,maint_respiration_clear |
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21 | |
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22 | ! first call |
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23 | LOGICAL, SAVE :: firstcall = .TRUE. |
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24 | |
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25 | CONTAINS |
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26 | |
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27 | SUBROUTINE maint_respiration_clear |
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28 | firstcall=.TRUE. |
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29 | END SUBROUTINE maint_respiration_clear |
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30 | |
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31 | SUBROUTINE maint_respiration ( npts,dt,lai, t2m,tlong_ref,stempdiag,height,veget_max,& |
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32 | rprof,biomass,resp_maint_part_radia) |
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33 | |
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34 | ! |
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35 | ! 0 declarations |
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36 | ! |
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37 | |
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38 | ! 0.1 input |
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39 | |
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40 | ! Domain size |
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41 | INTEGER(i_std), INTENT(in) :: npts |
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42 | ! time step (seconds) |
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43 | REAL(r_std), INTENT(in) :: dt |
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44 | ! 2 m air temperature (K) |
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45 | REAL(r_std), DIMENSION(npts), INTENT(in) :: t2m |
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46 | ! 2 m air temperature (K) |
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47 | REAL(r_std), DIMENSION(npts), INTENT(in) :: tlong_ref |
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48 | ! Soil temperature |
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49 | REAL(r_std),DIMENSION (npts,nbdl), INTENT (in) :: stempdiag |
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50 | ! height of vegetation (m) |
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51 | REAL(r_std), DIMENSION(npts,nvm), INTENT(in) :: height |
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52 | ! "maximal" coverage fraction of a PFT (LAI -> infinity) on nat/agri ground |
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53 | REAL(r_std), DIMENSION(npts,nvm), INTENT(in) :: veget_max |
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54 | ! root depth (m) |
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55 | REAL(r_std), DIMENSION(npts,nvm), INTENT(in) :: rprof |
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56 | ! biomass (gC/m**2) |
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57 | REAL(r_std),DIMENSION(npts,nvm,nparts),INTENT(in) :: biomass |
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58 | ! 0.2 modified fields |
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59 | |
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60 | |
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61 | ! 0.3 output |
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62 | |
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63 | ! maintenance respiration of different parts (gC/dt/m**2 of total ground) |
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64 | REAL(r_std), DIMENSION(npts,nvm,nparts), INTENT(out) :: resp_maint_part_radia |
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65 | ! 0.4 local |
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66 | |
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67 | ! leaf area index |
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68 | REAL(r_std), DIMENSION(npts,nvm) :: lai |
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69 | ! soil levels (m) |
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70 | REAL(r_std), SAVE, DIMENSION(0:nbdl) :: z_soil |
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71 | ! root temperature (convolution of root and soil temperature profiles) |
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72 | REAL(r_std), DIMENSION(npts,nvm) :: t_root |
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73 | ! maintenance respiration coefficients at 0 deg C (g/g d**-1) |
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74 | REAL(r_std), DIMENSION(npts,nvm,nparts) :: coeff_maint |
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75 | ! temperature which is pertinent for maintenance respiration (K) |
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76 | REAL(r_std), DIMENSION(npts,nparts) :: t_maint |
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77 | ! integration constant for root profile |
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78 | REAL(r_std), DIMENSION(npts) :: rpc |
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79 | ! temperature which is pertinent for maintenance respiration (K) |
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80 | REAL(r_std), DIMENSION(npts,nparts) :: t_maint_radia |
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81 | ! long term annual mean temperature, C |
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82 | REAL(r_std), DIMENSION(npts) :: tl |
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83 | ! slope of maintenance respiration coefficient (1/K) |
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84 | REAL(r_std), DIMENSION(npts) :: slope |
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85 | ! Index |
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86 | INTEGER(i_std) :: i,j,k,l,m |
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87 | |
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88 | ! |
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89 | ! |
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90 | ! 2 define maintenance respiration coefficients |
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91 | ! |
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92 | IF (bavard.GE.3) WRITE(numout,*) 'Entering respiration' |
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93 | ! |
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94 | ! 1 Initializations |
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95 | ! |
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96 | IF ( firstcall ) THEN |
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97 | |
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98 | ! 1.1.1 soil levels |
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99 | |
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100 | z_soil(0) = zero |
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101 | z_soil(1:nbdl) = diaglev(1:nbdl) |
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102 | |
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103 | ! 1.1.2 messages |
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104 | |
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105 | WRITE(numout,*) 'respiration:' |
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106 | |
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107 | firstcall = .FALSE. |
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108 | |
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109 | ENDIF |
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110 | |
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111 | ! |
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112 | |
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113 | ! |
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114 | ! 1 do initialisation |
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115 | ! |
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116 | |
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117 | |
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118 | DO j = 2,nvm |
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119 | |
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120 | ! 1.3.1 rpc is an integration constant such that the integral of the root profile is 1. |
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121 | |
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122 | rpc(:) = un / ( un - EXP( -z_soil(nbdl) / rprof(:,j) ) ) |
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123 | |
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124 | ! 1.3.2 integrate over the nbdl levels |
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125 | |
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126 | t_root(:,j) = zero |
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127 | |
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128 | DO l = 1, nbdl |
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129 | |
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130 | t_root(:,j) = & |
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131 | t_root(:,j) + stempdiag(:,l) * rpc(:) * & |
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132 | ( EXP( -z_soil(l-1)/rprof(:,j) ) - EXP( -z_soil(l)/rprof(:,j) ) ) |
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133 | |
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134 | ENDDO |
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135 | |
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136 | ENDDO |
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137 | |
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138 | DO j = 2,nvm |
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139 | |
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140 | ! |
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141 | ! 2.1 temperature which is taken for the plant part we are talking about |
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142 | ! |
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143 | |
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144 | ! 2.1.1 parts above the ground |
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145 | |
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146 | t_maint_radia(:,ileaf) = t2m(:) |
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147 | t_maint_radia(:,isapabove) = t2m(:) |
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148 | t_maint_radia(:,ifruit) = t2m(:) |
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149 | |
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150 | ! 2.1.2 parts below the ground |
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151 | |
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152 | t_maint_radia(:,isapbelow) = t_root(:,j) |
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153 | t_maint_radia(:,iroot) = t_root(:,j) |
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154 | |
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155 | ! 2.1.3 heartwood: does not respire. Any temperature |
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156 | |
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157 | t_maint_radia(:,iheartbelow) = t_root(:,j) |
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158 | t_maint_radia(:,iheartabove) = t2m(:) |
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159 | |
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160 | ! 2.1.4 reserve: above the ground for trees, below for grasses |
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161 | |
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162 | IF ( tree(j) ) THEN |
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163 | t_maint_radia(:,icarbres) = t2m(:) |
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164 | ELSE |
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165 | t_maint_radia(:,icarbres) = t_root(:,j) |
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166 | ENDIF |
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167 | |
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168 | ! |
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169 | ! 2.2 calculate coefficient |
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170 | ! |
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171 | |
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172 | tl(:) = tlong_ref(:) - ZeroCelsius |
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173 | slope(:) = maint_resp_slope(j,1) + tl(:) * maint_resp_slope(j,2) + & |
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174 | tl(:)*tl(:) * maint_resp_slope(j,3) |
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175 | |
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176 | DO k = 1, nparts |
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177 | |
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178 | coeff_maint(:,j,k) = & |
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179 | MAX( (coeff_maint_zero(j,k)*dt/one_day) * & |
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180 | ( un + slope(:) * (t_maint_radia(:,k)-ZeroCelsius) ), zero ) |
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181 | |
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182 | ENDDO |
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183 | |
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184 | ENDDO |
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185 | |
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186 | ! |
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187 | ! 3 calculate maintenance respiration. |
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188 | ! |
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189 | |
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190 | |
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191 | lai(:,ibare_sechiba) = zero |
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192 | resp_maint_part_radia(:,ibare_sechiba,:) = zero |
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193 | ! |
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194 | DO j = 2,nvm |
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195 | ! |
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196 | ! 3.1 maintenance respiration of the different plant parts |
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197 | ! |
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198 | lai(:,j) = biomass(:,j,ileaf) * sla(j) |
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199 | |
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200 | DO k = 1, nparts |
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201 | |
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202 | IF ( k .EQ. ileaf ) THEN |
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203 | |
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204 | ! Leaves: respiration depends on leaf mass AND LAI. |
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205 | !!$ WHERE ( (biomass(:,j,ileaf) > min_stomate) .AND. (lai(:,j) > 0.0) .AND. (lai(:,j) < val_exp) ) |
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206 | !!$ resp_maint_part_radia(:,j,k) = coeff_maint(:,j,k) * biomass(:,j,k) * & |
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207 | !!$ ( .3*lai(:,j) + 1.4*(1.-exp(-.5*lai(:,j))) ) / lai(:,j) |
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208 | !!$ ELSEWHERE |
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209 | !!$ resp_maint_part_radia(:,j,k) = 0.0 |
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210 | !!$ ENDWHERE |
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211 | DO i = 1, npts |
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212 | IF ( (biomass(i,j,ileaf) > min_stomate) .AND. (lai(i,j) > min_stomate) ) THEN |
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213 | !!$ IF (lai(i,j) < 100._r_std) THEN |
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214 | !!$ resp_maint_part_radia(i,j,k) = coeff_maint(i,j,k) * biomass(i,j,k) * & |
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215 | !!$ ( .3*lai(i,j) + 1.4*(1.-exp(-.5*lai(i,j))) ) / lai(i,j) |
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216 | !!$ ELSE |
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217 | !!$ resp_maint_part_radia(i,j,k) = coeff_maint(i,j,k) * biomass(i,j,k) * & |
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218 | !!$ ( .3*lai(i,j) + 1.4 ) / lai(i,j) |
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219 | !!$ ENDIF |
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220 | resp_maint_part_radia(i,j,k) = coeff_maint(i,j,k) * biomass(i,j,k) * & |
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221 | ( maint_resp_min_vmax*lai(i,j) + maint_resp_coeff*(un - exp(-ext_coeff(j)*lai(i,j))) ) / lai(i,j) |
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222 | ELSE |
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223 | resp_maint_part_radia(i,j,k) = zero |
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224 | ENDIF |
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225 | ENDDO |
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226 | ELSE |
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227 | |
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228 | resp_maint_part_radia(:,j,k) = coeff_maint(:,j,k) * biomass(:,j,k) |
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229 | |
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230 | ENDIF |
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231 | |
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232 | ENDDO |
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233 | |
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234 | ! |
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235 | ! 3.2 Total maintenance respiration of the plant |
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236 | ! VPP killer: |
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237 | ! resp_maint(:,j) = SUM( resp_maint_part(:,:), DIM=2 ) |
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238 | ! |
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239 | |
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240 | ENDDO |
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241 | |
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242 | |
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243 | IF (bavard.GE.4) WRITE(numout,*) 'Leaving respiration' |
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244 | |
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245 | END SUBROUTINE maint_respiration |
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246 | |
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247 | END MODULE stomate_resp |
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