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| 2 | |
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| 3 | subroutine SISVAT_zCr |
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| 4 | ! + |
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| 5 | ! +------------------------------------------------------------------------+ |
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| 6 | ! | MAR SISVAT_zCr 12-12-2002 MAR | |
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| 7 | ! | SubRoutine SISVAT_zCr determines criteria for Layers Agregation | |
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| 8 | ! | | |
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| 9 | ! +------------------------------------------------------------------------+ |
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| 10 | ! | | |
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| 11 | ! | PARAMETERS: klonv: Total Number of columns = | |
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| 12 | ! | ^^^^^^^^^^ = Total Number of continental grid boxes | |
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| 13 | ! | X Number of Mosaic Cell per grid box | |
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| 14 | ! | | |
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| 15 | ! | INPUT / isnoSV = total Nb of Ice/Snow Layers | |
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| 16 | ! | OUTPUT: iiceSV = total Nb of Ice Layers | |
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| 17 | ! | ^^^^^^ ispiSV = 0,...,nsno: Uppermost Superimposed Ice Layer | |
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| 18 | ! | istoSV = 0,...,5 : Snow History (see istdSV data) | |
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| 19 | ! | | |
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| 20 | ! | INPUT / ro__SV : Soil/Snow Volumic Mass [kg/m3] | |
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| 21 | ! | OUTPUT: & Snow Temperatures (layers 1,2,...,nsno) [K] | |
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| 22 | ! | ^^^^^^ G1snSV : Dendricity (<0) or Sphericity (>0) of Snow Layer | |
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| 23 | ! | G2snSV : Sphericity (>0) or Size of Snow Layer | |
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| 24 | ! | agsnSV : Snow Age [day] | |
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| 25 | ! | | |
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| 26 | ! | OUTPUT: LIndsv : Relative Index of a contiguous Layer to agregate | |
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| 27 | ! | ^^^^^^ | |
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| 28 | ! +------------------------------------------------------------------------+ |
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| 29 | ! + |
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| 30 | ! + |
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| 31 | ! + |
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| 32 | ! + |
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| 33 | ! +--Global Variables |
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| 34 | ! + ================ |
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| 35 | ! |
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| 36 | use VARphy |
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| 37 | use VAR_SV |
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| 38 | use VARdSV |
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| 39 | use VAR0SV |
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| 40 | use VARxSV |
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| 41 | use VARySV |
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| 42 | use VARtSV |
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| 43 | |
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| 44 | IMPLICIT NONE |
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| 45 | |
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| 46 | ! + |
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| 47 | ! + |
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| 48 | ! +--Internal Variables |
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| 49 | ! + ================== |
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| 50 | ! + |
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| 51 | integer :: ikl ,isn ,is0 ,is1 |
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| 52 | integer :: isno_1 ! Switch: ! Snow Layer over Ice |
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| 53 | real :: Dtyp_0,Dtyp_1 ! Snow Grains Difference Measure |
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| 54 | real :: DenSph ! 1. when contiguous spheric |
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| 55 | ! + ! and dendritic Grains |
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| 56 | real :: DendOK ! 1. when dendritic Grains |
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| 57 | real :: dTypMx ! Grain Type Differ. |
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| 58 | real :: dTypSp ! Sphericity Weight |
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| 59 | real :: dTypRo ! Density Weight |
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| 60 | real :: dTypDi ! Grain Diam.Weight |
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| 61 | real :: dTypHi ! History Weight |
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| 62 | |
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| 63 | |
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| 64 | ! +--DATA |
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| 65 | ! + ==== |
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| 66 | |
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| 67 | data dTypMx / 200.0 / ! Grain Type Weight |
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| 68 | data dTypSp / 0.5 / ! Sphericity Weight |
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| 69 | data dTypRo / 0.5 / ! Density Weight |
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| 70 | data dTypDi / 10.0 / ! Grain Diam.Weight |
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| 71 | data dTypHi / 100.0 / ! History Weight |
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| 72 | |
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| 73 | |
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| 74 | ! +--Agregation Criteria |
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| 75 | ! + =================== |
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| 76 | ! + |
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| 77 | DO ikl=1,knonv |
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| 78 | i_thin(ikl) = min(i_thin(ikl),isnoSV(ikl)) |
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| 79 | isn = max(1 ,i_thin(ikl)) |
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| 80 | ! + |
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| 81 | ! + |
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| 82 | ! +--Comparison with the downward Layer |
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| 83 | ! + ---------------------------------- |
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| 84 | ! + |
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| 85 | |
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| 86 | is0 = max(1, i_thin(ikl)-1 ) ! Downward Layer Index |
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| 87 | DenSph = max(zero, & ! isn/is1 |
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| 88 | sign(unun, & ! Dendricity/Sphericity |
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| 89 | epsi-G1snSV(ikl,isn) & ! Switch |
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| 90 | *G1snSV(ikl,is0))) ! |
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| 91 | DendOK = max(zero, & ! Dendricity Switch |
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| 92 | sign(unun, & ! |
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| 93 | epsi-G1snSV(ikl,isn))) ! |
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| 94 | ! + |
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| 95 | Dtyp_0 = & |
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| 96 | DenSph * dTypMx & |
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| 97 | +(1.-DenSph) & |
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| 98 | * DendOK *((abs(G1snSV(ikl,isn) & ! Dendricity |
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| 99 | -G1snSV(ikl,is0)) & ! Contribution |
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| 100 | +abs(G2snSV(ikl,isn) & ! Sphericity |
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| 101 | -G2snSV(ikl,is0))) *dTypSp & ! Contribution |
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| 102 | +abs(ro__SV(ikl,isn) & ! Density |
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| 103 | -ro__SV(ikl,is0)) *dTypRo) & ! Contribution |
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| 104 | +(1.-DenSph) & ! |
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| 105 | *(1.-DendOK)*((abs(G1snSV(ikl,isn) & ! Sphericity |
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| 106 | -G1snSV(ikl,is0)) & ! Contribution |
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| 107 | +abs(G2snSV(ikl,isn) & ! Size |
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| 108 | -G2snSV(ikl,is0))) *dTypDi & ! Contribution |
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| 109 | +abs(ro__SV(ikl,isn) & ! Density |
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| 110 | -ro__SV(ikl,is0)) *dTypRo) ! Contribution |
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| 111 | Dtyp_0 = & ! |
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| 112 | min(dTypMx, & ! |
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| 113 | Dtyp_0 & ! |
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| 114 | +abs(istoSV(ikl,isn) & ! History |
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| 115 | -istoSV(ikl,is0)) *dTypHi) & ! Contribution |
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| 116 | + (1 -abs(isn-is0)) * 1.e+6 & !"Same Layer"Score |
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| 117 | + max(0,1-abs(iiceSV(ikl) & !"Ice /Snow |
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| 118 | -is0)) * 1.e+6 ! Interface" Score |
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| 119 | ! + |
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| 120 | ! + |
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| 121 | ! +--Comparison with the upward Layer |
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| 122 | ! + ---------------------------------- |
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| 123 | ! + |
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| 124 | is1 = min( i_thin(ikl)+1, & ! Upward Layer Index |
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| 125 | max(1, isnoSV(ikl) )) ! |
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| 126 | DenSph = max(zero, & ! isn/is1 |
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| 127 | sign(unun, & ! Dendricity/Sphericity |
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| 128 | epsi-G1snSV(ikl,isn) & ! Switch |
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| 129 | *G1snSV(ikl,is1))) ! |
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| 130 | DendOK = max(zero, & ! Dendricity Switch |
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| 131 | sign(unun, & ! |
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| 132 | epsi-G1snSV(ikl,isn))) ! |
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| 133 | ! + |
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| 134 | Dtyp_1 = & |
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| 135 | DenSph * dTypMx & |
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| 136 | +(1.-DenSph) & |
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| 137 | * DendOK *((abs(G1snSV(ikl,isn) & ! Dendricity |
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| 138 | -G1snSV(ikl,is1)) & ! Contribution |
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| 139 | +abs(G2snSV(ikl,isn) & ! Sphericity |
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| 140 | -G2snSV(ikl,is1))) *dTypSp & ! Contribution |
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| 141 | +abs(ro__SV(ikl,isn) & ! Density |
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| 142 | -ro__SV(ikl,is1)) *dTypRo) & ! Contribution |
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| 143 | +(1.-DenSph) & ! |
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| 144 | *(1.-DendOK)*((abs(G1snSV(ikl,isn) & ! Sphericity |
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| 145 | -G1snSV(ikl,is1)) & ! Contribution |
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| 146 | +abs(G2snSV(ikl,isn) & ! Size |
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| 147 | -G2snSV(ikl,is1))) *dTypDi & ! Contribution |
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| 148 | +abs(ro__SV(ikl,isn) & ! Density |
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| 149 | -ro__SV(ikl,is1)) *dTypRo) ! Contribution |
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| 150 | Dtyp_1 = & ! |
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| 151 | min(dTypMx, & ! |
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| 152 | Dtyp_1 & ! |
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| 153 | +abs(istoSV(ikl,isn) & ! History |
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| 154 | -istoSV(ikl,is1)) *dTypHi) & ! Contribution |
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| 155 | + (1 -abs(isn-is1)) * 1.e+6 & !"Same Layer"Score |
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| 156 | + max(0,1-abs(iiceSV(ikl) & !"Ice /Snow |
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| 157 | -isn)) * 1.e+6 ! Interface" Score |
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| 158 | ! + |
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| 159 | ! + |
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| 160 | ! +--Index of the Layer to agregate |
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| 161 | ! + ============================== |
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| 162 | ! + |
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| 163 | LIndsv(ikl) = sign(unun,Dtyp_0 & |
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| 164 | -Dtyp_1) |
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| 165 | isno_1 = (1 -min (abs(isnoSV(ikl) & ! Switch = 1 |
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| 166 | -iiceSV(ikl)-1),1)) & ! if isno = iice +1 |
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| 167 | * (1 -min (abs(isnoSV(ikl) & ! Switch = 1 |
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| 168 | -i_thin(ikl) ),1)) ! if isno = i_ithin |
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| 169 | LIndsv(ikl) = (1 -isno_1) *LIndsv(ikl) & ! Contiguous Layer is |
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| 170 | -isno_1 ! downward for top L. |
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| 171 | i_thin(ikl) = max(1, i_thin(ikl) ) |
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| 172 | END DO |
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| 173 | ! + |
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| 174 | return |
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| 175 | end subroutine sisvat_zcr |
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