[64] | 1 | ! establishment routine |
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| 2 | ! Suppose seed pool >> establishment rate. |
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| 3 | ! |
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| 4 | ! $Header: /home/ssipsl/CVSREP/ORCHIDEE/src_stomate/lpj_establish.f90,v 1.9 2009/01/06 15:01:25 ssipsl Exp $ |
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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 | MODULE lpj_establish |
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| 9 | |
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| 10 | ! modules used: |
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| 11 | |
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| 12 | USE ioipsl |
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| 13 | USE stomate_data |
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| 14 | USE constantes |
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| 15 | |
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| 16 | IMPLICIT NONE |
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| 17 | |
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| 18 | ! private & public routines |
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| 19 | |
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| 20 | PRIVATE |
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| 21 | PUBLIC establish,establish_clear |
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| 22 | |
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| 23 | ! first call |
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| 24 | LOGICAL, SAVE :: firstcall = .TRUE. |
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| 25 | CONTAINS |
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| 26 | |
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| 27 | |
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| 28 | SUBROUTINE establish_clear |
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| 29 | firstcall = .TRUE. |
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| 30 | END SUBROUTINE establish_clear |
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| 31 | |
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| 32 | SUBROUTINE establish (npts, dt, PFTpresent, regenerate, & |
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| 33 | neighbours, resolution, need_adjacent, herbivores, & |
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| 34 | precip_annual, gdd0, lm_lastyearmax, & |
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| 35 | cn_ind, lai, avail_tree, avail_grass, & |
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| 36 | leaf_age, leaf_frac, & |
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| 37 | ind, biomass, age, everywhere, co2_to_bm,veget_max) |
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| 38 | |
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| 39 | ! |
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| 40 | ! 0 declarations |
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| 41 | ! |
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| 42 | |
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| 43 | ! 0.1 input |
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| 44 | |
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| 45 | ! Domain size |
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| 46 | INTEGER(i_std), INTENT(in) :: npts |
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| 47 | ! Time step of vegetation dynamics (days) |
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| 48 | REAL(r_std), INTENT(in) :: dt |
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| 49 | ! Is pft there |
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| 50 | LOGICAL, DIMENSION(npts,nvm), INTENT(in) :: PFTpresent |
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| 51 | ! Winter sufficiently cold |
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| 52 | REAL(r_std), DIMENSION(npts,nvm), INTENT(in) :: regenerate |
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| 53 | ! indices of the 8 neighbours of each grid point (1=N, 2=NE, 3=E, 4=SE, 5=S, 6=SW, 7=W, 8=NW) |
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| 54 | INTEGER(i_std), DIMENSION(npts,8), INTENT(in) :: neighbours |
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| 55 | ! resolution at each grid point in m (1=E-W, 2=N-S) |
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| 56 | REAL(r_std), DIMENSION(npts,2), INTENT(in) :: resolution |
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| 57 | ! in order for this PFT to be introduced, does it have to be present in an |
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| 58 | ! adjacent grid box? |
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| 59 | LOGICAL, DIMENSION(npts,nvm), INTENT(in) :: need_adjacent |
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| 60 | ! time constant of probability of a leaf to be eaten by a herbivore (days) |
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| 61 | REAL(r_std), DIMENSION(npts,nvm), INTENT(in) :: herbivores |
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| 62 | ! annual precipitation (mm/year) |
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| 63 | REAL(r_std), DIMENSION(npts), INTENT(in) :: precip_annual |
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| 64 | ! growing degree days (C) |
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| 65 | REAL(r_std), DIMENSION(npts), INTENT(in) :: gdd0 |
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| 66 | ! last year's maximum leaf mass, for each PFT (gC/(m**2 of ground)) |
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| 67 | REAL(r_std), DIMENSION(npts,nvm), INTENT(in) :: lm_lastyearmax |
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| 68 | ! crown area of individuals (m**2) |
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| 69 | REAL(r_std), DIMENSION(npts,nvm), INTENT(in) :: cn_ind |
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| 70 | ! leaf area index OF AN INDIVIDUAL PLANT |
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| 71 | REAL(r_std), DIMENSION(npts,nvm), INTENT(in) :: lai |
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| 72 | ! space availability for trees |
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| 73 | REAL(r_std), DIMENSION(npts), INTENT(in) :: avail_tree |
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| 74 | ! space availability for grasses |
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| 75 | REAL(r_std), DIMENSION(npts), INTENT(in) :: avail_grass |
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| 76 | ! "maximal" coverage fraction of a PFT (LAI -> infinity) on ground |
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| 77 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: veget_max |
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| 78 | |
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| 79 | ! 0.2 modified fields |
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| 80 | |
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| 81 | ! leaf age (days) |
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| 82 | REAL(r_std), DIMENSION(npts,nvm,nleafages), INTENT(inout) :: leaf_age |
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| 83 | ! fraction of leaves in leaf age class |
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| 84 | REAL(r_std), DIMENSION(npts,nvm,nleafages), INTENT(inout) :: leaf_frac |
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| 85 | ! Number of individuals / m2 |
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| 86 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: ind |
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| 87 | ! biomass (gC/(m**2 of ground)) |
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| 88 | REAL(r_std), DIMENSION(npts,nvm,nparts), INTENT(inout) :: biomass |
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| 89 | ! mean age (years) |
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| 90 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: age |
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| 91 | ! is the PFT everywhere in the grid box or very localized (after its introduction) |
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| 92 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: everywhere |
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| 93 | ! biomass uptaken (gC/(m**2 of total ground)/day) |
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| 94 | !NV passage 2D |
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| 95 | REAL(r_std), DIMENSION(npts,nvm), INTENT(inout) :: co2_to_bm |
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| 96 | |
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| 97 | ! 0.3 local |
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| 98 | |
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| 99 | ! time during which a sapling can be entirely eaten by herbivores (d) |
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| 100 | REAL(r_std) :: tau_eatup |
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| 101 | ! new fpc ( foliage protected cover: fractional coverage ) |
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| 102 | REAL(r_std), DIMENSION(npts,nvm) :: fpc_nat |
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| 103 | ! maximum tree establishment rate, based on climate only |
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| 104 | REAL(r_std), DIMENSION(npts) :: estab_rate_max_climate_tree |
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| 105 | ! maximum grass establishment rate, based on climate only |
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| 106 | REAL(r_std), DIMENSION(npts) :: estab_rate_max_climate_grass |
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| 107 | ! maximum tree establishment rate, based on climate and fpc |
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| 108 | REAL(r_std), DIMENSION(npts) :: estab_rate_max_tree |
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| 109 | ! maximum grass establishment rate, based on climate and fpc |
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| 110 | REAL(r_std), DIMENSION(npts) :: estab_rate_max_grass |
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| 111 | ! total natural fpc |
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| 112 | REAL(r_std), DIMENSION(npts) :: sumfpc |
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| 113 | ! total woody fpc |
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| 114 | REAL(r_std), DIMENSION(npts) :: sumfpc_wood |
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| 115 | ! for trees, measures the total concurrence for available space |
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| 116 | REAL(r_std), DIMENSION(npts) :: spacefight_tree |
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| 117 | ! for grasses, measures the total concurrence for available space |
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| 118 | REAL(r_std), DIMENSION(npts) :: spacefight_grass |
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| 119 | ! change in number of individuals /m2 per time step (per day in history file) |
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| 120 | REAL(r_std), DIMENSION(npts,nvm) :: d_ind |
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| 121 | ! biomass increase (gC/(m**2 of ground)) |
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| 122 | REAL(r_std), DIMENSION(npts) :: bm_new |
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| 123 | ! stem diameter (m) |
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| 124 | REAL(r_std), DIMENSION(npts) :: dia |
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| 125 | ! temporary variable |
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| 126 | REAL(r_std), DIMENSION(npts) :: b1 |
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| 127 | ! new sap mass (gC/(m**2 of ground)) |
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| 128 | REAL(r_std), DIMENSION(npts) :: sm2 |
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| 129 | ! woodmass of an individual |
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| 130 | REAL(r_std), DIMENSION(npts) :: woodmass |
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| 131 | ! ratio of hw(above) to total hw, sm(above) to total sm |
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| 132 | REAL(r_std), DIMENSION(npts) :: sm_at |
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| 133 | ! reduction factor for establishment if many trees or grasses are present |
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| 134 | REAL(r_std), DIMENSION(npts) :: factor |
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| 135 | ! from how many sides is the grid box invaded |
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| 136 | INTEGER(i_std) :: nfrontx |
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| 137 | INTEGER(i_std) :: nfronty |
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| 138 | ! daily establishment rate is large compared to present number of individuals |
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| 139 | LOGICAL, DIMENSION(npts) :: many_new |
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| 140 | ! indices |
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| 141 | INTEGER(i_std) :: i,j,k,m |
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| 142 | |
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| 143 | ! ========================================================================= |
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| 144 | |
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| 145 | IF (bavard.GE.3) WRITE(numout,*) 'Entering establish' |
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| 146 | |
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| 147 | ! |
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| 148 | ! 1 messages and initialization |
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| 149 | ! |
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| 150 | tau_eatup = one_year/2. |
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| 151 | |
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| 152 | IF ( firstcall ) THEN |
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| 153 | |
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| 154 | WRITE(numout,*) 'establish:' |
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| 155 | |
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| 156 | WRITE(numout,*) ' > time during which a sapling can be entirely eaten by herbivores (d): ', & |
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| 157 | tau_eatup |
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| 158 | |
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| 159 | firstcall = .FALSE. |
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| 160 | |
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| 161 | ENDIF |
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| 162 | |
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| 163 | ! |
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| 164 | ! 2 recalculate fpc |
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| 165 | ! |
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| 166 | |
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| 167 | ! |
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| 168 | ! 2.1 Only natural part of the grid cell |
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| 169 | ! |
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| 170 | |
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| 171 | DO j = 2,nvm |
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| 172 | |
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| 173 | IF ( natural(j) ) THEN |
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| 174 | DO i = 1, npts |
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| 175 | IF (lai(i,j) == val_exp) THEN |
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| 176 | fpc_nat(i,j) = cn_ind(i,j) * ind(i,j) |
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| 177 | ELSE |
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| 178 | fpc_nat(i,j) = cn_ind(i,j) * ind(i,j) * ( 1. - exp( -lai(i,j) * ext_coeff(j) ) ) |
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| 179 | ENDIF |
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| 180 | ENDDO |
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| 181 | ELSE |
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| 182 | |
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| 183 | fpc_nat(:,j) = 0.0 |
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| 184 | |
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| 185 | ENDIF |
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| 186 | |
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| 187 | ENDDO |
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| 188 | |
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| 189 | ! |
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| 190 | ! 2.2 total natural fpc on grid |
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| 191 | ! |
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| 192 | |
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| 193 | sumfpc(:) = SUM( fpc_nat(:,:), DIM=2 ) |
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| 194 | |
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| 195 | ! |
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| 196 | ! 2.3 total woody fpc on grid and number of regenerative tree pfts |
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| 197 | ! |
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| 198 | |
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| 199 | sumfpc_wood(:) = 0.0 |
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| 200 | spacefight_tree(:) = 0.0 |
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| 201 | |
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| 202 | DO j = 2,nvm |
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| 203 | |
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| 204 | IF ( tree(j) .AND. natural(j) ) THEN |
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| 205 | |
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| 206 | ! total woody fpc |
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| 207 | |
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| 208 | WHERE ( PFTpresent(:,j) ) |
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| 209 | sumfpc_wood(:) = sumfpc_wood(:) + fpc_nat(:,j) |
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| 210 | ENDWHERE |
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| 211 | |
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| 212 | ! how many trees are competing? Count a PFT fully only if it is present |
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| 213 | ! on the whole grid box. |
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| 214 | |
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| 215 | WHERE ( PFTpresent(:,j) .AND. ( regenerate(:,j) .GT. regenerate_crit ) ) |
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| 216 | spacefight_tree(:) = spacefight_tree(:) + everywhere(:,j) |
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| 217 | ENDWHERE |
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| 218 | |
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| 219 | ENDIF |
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| 220 | |
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| 221 | ENDDO |
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| 222 | |
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| 223 | ! |
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| 224 | ! 2.4 number of natural grasses |
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| 225 | ! |
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| 226 | |
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| 227 | spacefight_grass(:) = 0.0 |
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| 228 | |
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| 229 | DO j = 2,nvm |
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| 230 | |
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| 231 | IF ( .NOT. tree(j) .AND. natural(j) ) THEN |
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| 232 | |
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| 233 | ! how many grasses are competing? Count a PFT fully only if it is present |
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| 234 | ! on the whole grid box. |
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| 235 | |
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| 236 | WHERE ( PFTpresent(:,j) ) |
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| 237 | spacefight_grass(:) = spacefight_grass(:) + everywhere(:,j) |
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| 238 | ENDWHERE |
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| 239 | |
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| 240 | ENDIF |
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| 241 | |
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| 242 | ENDDO |
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| 243 | |
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| 244 | ! |
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| 245 | ! 3 establishment rate |
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| 246 | ! |
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| 247 | |
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| 248 | ! |
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| 249 | ! 3.1 maximum establishment rate, based on climate only |
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| 250 | ! |
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| 251 | |
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| 252 | WHERE ( ( precip_annual(:) .GE. precip_crit ) .AND. ( gdd0(:) .GE. gdd_crit_estab ) ) |
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| 253 | |
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| 254 | estab_rate_max_climate_tree(:) = estab_max_tree |
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| 255 | estab_rate_max_climate_grass(:) = estab_max_grass |
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| 256 | |
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| 257 | ELSEWHERE |
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| 258 | |
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| 259 | estab_rate_max_climate_tree(:) = 0.0 |
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| 260 | estab_rate_max_climate_grass(:) = 0.0 |
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| 261 | |
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| 262 | ENDWHERE |
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| 263 | |
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| 264 | ! |
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| 265 | ! 3.2 reduce maximum tree establishment rate if many trees present. |
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| 266 | ! In the original DGVM, this is done using a step function which yields a |
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| 267 | ! reduction by factor 4 if sumfpc_wood(i) .GT. fpc_crit - 0.05. |
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| 268 | ! This can lead to small oscillations (without consequences however). |
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| 269 | ! Here, a steady linear transition is used between fpc_crit-0.075 and |
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| 270 | ! fpc_crit-0.025. |
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| 271 | ! |
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| 272 | |
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| 273 | factor(:) = 1. - establish_scal_fact * ( sumfpc_wood(:) - (fpc_crit - fpc_crit_max) ) |
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| 274 | factor(:) = MAX( 0.25_r_std, MIN( un, factor(:) ) ) |
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| 275 | |
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| 276 | estab_rate_max_tree(:) = estab_rate_max_climate_tree(:) * factor(:) |
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| 277 | |
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| 278 | ! |
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| 279 | ! 3.3 Modulate grass establishment rate. |
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| 280 | ! If canopy is not closed (fpc < fpc_crit-0.05), normal establishment. |
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| 281 | ! If canopy is closed, establishment is reduced by a factor 4. |
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| 282 | ! Factor is linear between these two bounds. |
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| 283 | ! This is different from the original DGVM where a step function is |
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| 284 | ! used at fpc_crit-0.05 (This can lead to small oscillations, |
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| 285 | ! without consequences however). |
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| 286 | ! |
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| 287 | |
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| 288 | factor(:) = 1. - establish_scal_fact * ( sumfpc(:) - (fpc_crit - fpc_crit_min) ) |
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| 289 | factor(:) = MAX( 0.25_r_std, MIN( un, factor(:) ) ) |
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| 290 | |
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| 291 | estab_rate_max_grass(:) = estab_rate_max_climate_grass(:) * factor(:) |
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| 292 | |
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| 293 | ! |
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| 294 | ! 4 do establishment for natural PFTs |
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| 295 | ! |
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| 296 | |
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| 297 | d_ind(:,:) = 0.0 |
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| 298 | |
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| 299 | DO j = 2,nvm |
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| 300 | |
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| 301 | ! only for natural PFTs |
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| 302 | |
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| 303 | IF ( natural(j) ) THEN |
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| 304 | |
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| 305 | ! |
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| 306 | ! 4.1 PFT expansion across the grid box. Not to be confused with areal |
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| 307 | ! coverage. |
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| 308 | ! |
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| 309 | |
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| 310 | IF ( treat_expansion ) THEN |
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| 311 | |
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| 312 | ! only treat plants that are regenerative and present and still can expand |
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| 313 | |
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| 314 | DO i = 1, npts |
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| 315 | |
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| 316 | IF ( PFTpresent(i,j) .AND. & |
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| 317 | ( everywhere(i,j) .LT. 1. ) .AND. & |
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| 318 | ( regenerate(i,j) .GT. regenerate_crit ) ) THEN |
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| 319 | |
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| 320 | ! from how many sides is the grid box invaded (separate x and y directions |
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| 321 | ! because resolution may be strongly anisotropic) |
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| 322 | ! |
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| 323 | ! For the moment we only look into 4 direction but that can be extanded (JP) |
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| 324 | ! |
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| 325 | nfrontx = 0 |
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| 326 | IF ( neighbours(i,3) .GT. 0 ) THEN |
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| 327 | IF ( everywhere(neighbours(i,3),j) .GT. 1.-min_stomate ) nfrontx = nfrontx+1 |
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| 328 | ENDIF |
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| 329 | IF ( neighbours(i,7) .GT. 0 ) THEN |
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| 330 | IF ( everywhere(neighbours(i,7),j) .GT. 1.-min_stomate ) nfrontx = nfrontx+1 |
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| 331 | ENDIF |
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| 332 | |
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| 333 | nfronty = 0 |
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| 334 | IF ( neighbours(i,1) .GT. 0 ) THEN |
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| 335 | IF ( everywhere(neighbours(i,1),j) .GT. 1.-min_stomate ) nfronty = nfronty+1 |
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| 336 | ENDIF |
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| 337 | IF ( neighbours(i,5) .GT. 0 ) THEN |
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| 338 | IF ( everywhere(neighbours(i,5),j) .GT. 1.-min_stomate ) nfronty = nfronty+1 |
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| 339 | ENDIF |
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| 340 | |
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| 341 | everywhere(i,j) = & |
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| 342 | everywhere(i,j) + migrate(j) * dt/one_year * & |
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| 343 | ( nfrontx / resolution(i,1) + nfronty / resolution(i,2) ) |
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| 344 | |
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| 345 | IF ( .NOT. need_adjacent(i,j) ) THEN |
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| 346 | |
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| 347 | ! in that case, we also assume that the PFT expands from places within |
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| 348 | ! the grid box (e.g., oasis). |
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| 349 | |
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| 350 | everywhere(i,j) = & |
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| 351 | everywhere(i,j) + migrate(j) * dt/one_year * & |
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| 352 | 2. * SQRT( pi*everywhere(i,j)/(resolution(i,1)*resolution(i,2)) ) |
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| 353 | |
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| 354 | ENDIF |
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| 355 | |
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| 356 | everywhere(i,j) = MIN( everywhere(i,j), un ) |
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| 357 | |
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| 358 | ENDIF |
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| 359 | |
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| 360 | ENDDO |
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| 361 | |
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| 362 | ENDIF ! treat expansion? |
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| 363 | |
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| 364 | ! |
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| 365 | ! 4.2 establishment rate |
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| 366 | ! - Is lower if the PFT is only present in a small part of the grid box |
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| 367 | ! (after its introduction), therefore multiplied by "everywhere". |
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| 368 | ! - Is divided by the number of PFTs that compete ("spacefight"). |
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| 369 | ! - Is modulated by space availability (avail_tree, avail_grass). |
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| 370 | ! |
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| 371 | |
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| 372 | IF ( tree(j) ) THEN |
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| 373 | |
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| 374 | ! 4.2.1 present and regenerative trees |
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| 375 | |
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| 376 | WHERE ( PFTpresent(:,j) .AND. ( regenerate(:,j) .GT. regenerate_crit ) ) |
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| 377 | |
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| 378 | |
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| 379 | d_ind(:,j) = estab_rate_max_tree(:)*everywhere(:,j)/spacefight_tree(:) * & |
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| 380 | avail_tree(:) * dt/one_year |
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| 381 | |
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| 382 | ENDWHERE |
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| 383 | |
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| 384 | ELSE |
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| 385 | |
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| 386 | ! 4.2.2 present and regenerative grasses |
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| 387 | |
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| 388 | WHERE ( PFTpresent(:,j) .AND. ( regenerate(:,j) .GT. regenerate_crit ) ) |
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| 389 | |
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| 390 | d_ind(:,j) = estab_rate_max_grass(:)*everywhere(:,j)/spacefight_grass(:) * & |
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| 391 | avail_grass(:) * dt/one_year |
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| 392 | |
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| 393 | ENDWHERE |
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| 394 | |
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| 395 | ENDIF ! tree/grass |
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| 396 | |
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| 397 | ! |
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| 398 | ! 4.3 herbivores reduce establishment rate |
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| 399 | ! We suppose that saplings are vulnerable during a given time after establishment. |
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| 400 | ! This is taken into account by preventively reducing the establishment rate. |
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| 401 | ! |
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| 402 | |
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| 403 | IF ( ok_herbivores ) THEN |
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| 404 | |
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| 405 | d_ind(:,j) = d_ind(:,j) * EXP( - tau_eatup/herbivores(:,j) ) |
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| 406 | |
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| 407 | ENDIF |
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| 408 | |
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| 409 | ! |
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| 410 | ! 4.4 be sure that ind*cn_ind does not exceed 1 |
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| 411 | ! |
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| 412 | |
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| 413 | WHERE ( ( d_ind(:,j) .GT. 0.0 ) .AND. & |
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| 414 | ( (ind(:,j)+d_ind(:,j))*cn_ind(:,j) .GT. 1. ) ) |
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| 415 | |
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| 416 | d_ind(:,j) = MAX( un / cn_ind(:,j) - ind(:,j), zero) |
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| 417 | |
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| 418 | ENDWHERE |
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| 419 | |
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| 420 | ! |
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| 421 | ! 4.5 new properties where there is establishment ( d_ind > 0 ) |
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| 422 | ! |
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| 423 | |
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| 424 | ! 4.5.1 biomass. |
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| 425 | ! Add biomass only if d_ind, over one year, is of the order of ind. |
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| 426 | ! (If we don't do this, the biomass density can become very low). |
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| 427 | ! In that case, take biomass from the atmosphere. |
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| 428 | |
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| 429 | ! compare establishment rate and present number of inidivuals |
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| 430 | many_new(:) = ( d_ind(:,j) .GT. 0.1 * ind(:,j) ) |
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| 431 | |
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| 432 | ! gives a better vectorization of the VPP |
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| 433 | |
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| 434 | IF ( ANY( many_new(:) ) ) THEN |
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| 435 | |
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| 436 | DO k = 1, nparts |
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| 437 | |
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| 438 | WHERE ( many_new(:) ) |
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| 439 | |
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| 440 | bm_new(:) = d_ind(:,j) * bm_sapl(j,k) / veget_max (:,j) |
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| 441 | |
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| 442 | biomass(:,j,k) = biomass(:,j,k) + bm_new(:) |
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| 443 | |
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| 444 | !NV passage 2D |
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| 445 | co2_to_bm(:,j) = co2_to_bm(:,j) + bm_new(:) / dt |
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| 446 | |
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| 447 | ENDWHERE |
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| 448 | |
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| 449 | ENDDO |
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| 450 | |
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| 451 | ! reset leaf ages. Should do a real calculation like in the npp routine, |
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| 452 | ! but this case is rare and not worth messing around. |
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| 453 | |
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| 454 | WHERE ( many_new(:) ) |
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| 455 | leaf_age(:,j,1) = 0.0 |
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| 456 | leaf_frac(:,j,1) = 1.0 |
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| 457 | ENDWHERE |
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| 458 | |
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| 459 | DO m = 2, nleafages |
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| 460 | |
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| 461 | WHERE ( many_new(:) ) |
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| 462 | leaf_age(:,j,m) = 0.0 |
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| 463 | leaf_frac(:,j,m) = 0.0 |
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| 464 | ENDWHERE |
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| 465 | |
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| 466 | ENDDO |
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| 467 | |
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| 468 | ENDIF ! establishment rate is large |
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| 469 | |
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| 470 | WHERE ( d_ind(:,j) .GT. 0.0 ) |
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| 471 | |
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| 472 | ! 4.5.2 age decreases |
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| 473 | |
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| 474 | age(:,j) = age(:,j) * ind(:,j) / ( ind(:,j) + d_ind(:,j) ) |
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| 475 | |
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| 476 | ! 4.5.3 new number of individuals |
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| 477 | |
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| 478 | ind(:,j) = ind(:,j) + d_ind(:,j) |
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| 479 | |
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| 480 | ENDWHERE |
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| 481 | |
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| 482 | ! |
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| 483 | ! 4.6 eventually convert excess sapwood to heartwood |
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| 484 | ! |
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| 485 | |
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| 486 | IF ( tree(j) ) THEN |
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| 487 | |
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| 488 | sm2(:) = 0.0 |
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| 489 | |
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| 490 | WHERE ( d_ind(:,j) .GT. 0.0 ) |
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| 491 | |
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| 492 | ! ratio of above / total sap parts |
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| 493 | sm_at(:) = biomass(:,j,isapabove) / & |
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| 494 | ( biomass(:,j,isapabove) + biomass(:,j,isapbelow) ) |
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| 495 | |
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| 496 | ! woodmass of an individual |
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| 497 | |
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| 498 | woodmass(:) = & |
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| 499 | ( biomass(:,j,isapabove) + biomass(:,j,isapbelow) + & |
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| 500 | biomass(:,j,iheartabove) + biomass(:,j,iheartbelow) ) / ind(:,j) |
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| 501 | |
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| 502 | ! crown area (m**2) depends on stem diameter (pipe model) |
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| 503 | dia(:) = ( woodmass(:) / ( pipe_density * pi/4. * pipe_tune2 ) ) & |
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| 504 | ** ( 1. / ( 2. + pipe_tune3 ) ) |
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| 505 | |
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| 506 | b1(:) = pipe_k1 / ( sla(j) * pipe_density*pipe_tune2 * dia(:)**pipe_tune3 ) * & |
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| 507 | ind(:,j) |
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| 508 | sm2(:) = lm_lastyearmax(:,j) / b1(:) |
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| 509 | |
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| 510 | ENDWHERE |
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| 511 | |
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| 512 | WHERE ( ( d_ind(:,j) .GT. 0.0 ) .AND. & |
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| 513 | ( biomass(:,j,isapabove) + biomass(:,j,isapbelow) ) .GT. sm2(:) ) |
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| 514 | |
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| 515 | biomass(:,j,iheartabove) = biomass(:,j,iheartabove) + & |
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| 516 | ( biomass(:,j,isapabove) - sm2(:) * sm_at(:) ) |
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| 517 | biomass(:,j,isapabove) = sm2(:) * sm_at(:) |
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| 518 | |
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| 519 | biomass(:,j,iheartbelow) = biomass(:,j,iheartbelow) + & |
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| 520 | ( biomass(:,j,isapbelow) - sm2(:) * (1. - sm_at) ) |
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| 521 | biomass(:,j,isapbelow) = sm2(:) * (1. - sm_at(:)) |
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| 522 | |
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| 523 | ENDWHERE |
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| 524 | |
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| 525 | ENDIF ! tree |
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| 526 | |
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| 527 | ENDIF ! natural |
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| 528 | |
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| 529 | ENDDO ! loop over pfts |
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| 530 | |
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| 531 | ! |
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| 532 | ! 5 history |
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| 533 | ! |
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| 534 | |
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| 535 | d_ind = d_ind / dt |
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| 536 | |
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| 537 | CALL histwrite (hist_id_stomate, 'IND_ESTAB', itime, d_ind, npts*nvm, horipft_index) |
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| 538 | |
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| 539 | IF (bavard.GE.4) WRITE(numout,*) 'Leaving establish' |
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| 540 | |
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| 541 | END SUBROUTINE establish |
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| 542 | |
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| 543 | END MODULE lpj_establish |
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