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| 2 | |
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| 3 | subroutine SISVAT_zSn |
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| 4 | |
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| 5 | C +------------------------------------------------------------------------+ |
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| 6 | C | MAR SISVAT_zSn 12-07-2019 MAR | |
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| 7 | C | SubRoutine SISVAT_zSn manages the Snow Pack vertical Discretization | |
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| 8 | C | | |
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| 9 | C +------------------------------------------------------------------------+ |
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| 10 | C | | |
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| 11 | C | PARAMETERS: knonv: Total Number of columns = | |
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| 12 | C | ^^^^^^^^^^ = Total Number of continental grid boxes | |
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| 13 | C | X Number of Mosaic Cell per grid box | |
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| 14 | C | | |
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| 15 | C | INPUT / NLaysv = New Snow Layer Switch | |
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| 16 | C | OUTPUT: isnoSV = total Nb of Ice/Snow Layers | |
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| 17 | C | ^^^^^^ ispiSV = 0,...,nsno: Uppermost Superimposed Ice Layer | |
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| 18 | C | iiceSV = total Nb of Ice Layers | |
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| 19 | C | istoSV = 0,...,5 : Snow History (see istdSV data) | |
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| 20 | C | | |
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| 21 | C | INPUT / TsisSV : Soil/Ice Temperatures (layers -nsol,-nsol+1,..,0)| |
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| 22 | C | OUTPUT: & Snow Temperatures (layers 1,2,...,nsno) [K] | |
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| 23 | C | ^^^^^^ ro__SV : Soil/Snow Volumic Mass [kg/m3] | |
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| 24 | C | eta_SV : Soil/Snow Water Content [m3/m3] | |
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| 25 | C | dzsnSV : Snow Layer Thickness [m] | |
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| 26 | C | G1snSV : Dendricity (<0) or Sphericity (>0) of Snow Layer | |
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| 27 | C | G2snSV : Sphericity (>0) or Size of Snow Layer | |
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| 28 | C | agsnSV : Snow Age [day] | |
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| 29 | C | | |
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| 30 | C | METHOD: 1) Agregate the thinest Snow Layer | |
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| 31 | C | ^^^^^^ if a new Snow Layer has been precipitated (NLaysv = 1) | |
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| 32 | C | 2) Divide a too thick Snow Layer except | |
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| 33 | C | if the maximum Number of Layer is reached | |
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| 34 | C | in this case forces NLay_s = 1 | |
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| 35 | C | 3) Agregate the thinest Snow Layer | |
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| 36 | C | in order to divide a too thick Snow Layer | |
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| 37 | C | at next Time Step when NLay_s = 1 | |
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| 38 | C | | |
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| 39 | C +------------------------------------------------------------------------+ |
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| 40 | |
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| 41 | |
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| 42 | |
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| 43 | |
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| 44 | C +--Global Variables |
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| 45 | C + ================ |
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| 46 | |
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| 47 | |
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| 48 | use VARphy |
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| 49 | use VAR_SV |
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| 50 | use VARdSV |
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| 51 | use VAR0SV |
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| 52 | use VARxSV |
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| 53 | use VARySV |
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| 54 | use surface_data, only: ok_zsn_ii |
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| 55 | |
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| 56 | IMPLICIT NONE |
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| 57 | |
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| 58 | |
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| 59 | C +--Internal Variables |
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| 60 | C + ================== |
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| 61 | |
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| 62 | integer ikl ,isn ,i ! |
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| 63 | |
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| 64 | |
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| 65 | |
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| 66 | |
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| 67 | |
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| 68 | |
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| 69 | integer NLay_s(knonv) ! Split Snow Layer Switch |
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| 70 | integer isagr1(knonv) ! 1st Layer History |
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| 71 | integer isagr2(knonv) ! 2nd Layer History |
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| 72 | integer LstLay ! 0 ====> isnoSV = 1 |
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| 73 | integer isno_n ! Snow Normal.Profile |
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| 74 | integer iice_n ! Ice Normal.Profile |
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| 75 | integer iiceOK ! Ice Switch |
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| 76 | integer icemix ! 0 ====> Agregated Snow+Ice=Snow |
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| 77 | C + ! 1 Ice |
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| 78 | integer isn1 (knonv) ! 1st layer to stagger |
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| 79 | real staggr ! stagger Switch |
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| 80 | |
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| 81 | real WEagre(knonv) ! Snow Water Equivalent Thickness |
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| 82 | real dzthin(knonv) ! Thickness of the thinest layer |
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| 83 | real OKthin ! Swich ON a new thinest layer |
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| 84 | real dz_dif ! difference from ideal discret. |
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| 85 | real thickL ! Thick Layer Indicator |
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| 86 | real OK_ICE ! Swich ON uppermost Ice Layer |
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| 87 | |
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| 88 | real Agrege(knonv) ! 1. when Agregation constrained |
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| 89 | real dzepsi ! Min Single Snw Layer Thickness |
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| 90 | real dzxmin ! Min Acceptable Layer Thickness |
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| 91 | real dz_min ! Min Layer Thickness |
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| 92 | real dz_max ! Max Layer Thickness |
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| 93 | real dzagr1(knonv) ! 1st Layer Thickness |
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| 94 | real dzagr2(knonv) ! 2nd Layer Thickness |
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| 95 | real T_agr1(knonv) ! 1st Layer Temperature |
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| 96 | real T_agr2(knonv) ! 2nd Layer Temperature |
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| 97 | real roagr1(knonv) ! 1st Layer Density |
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| 98 | real roagr2(knonv) ! 2nd Layer Density |
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| 99 | real etagr1(knonv) ! 1st Layer Water Content |
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| 100 | real etagr2(knonv) ! 2nd Layer Water Content |
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| 101 | real G1agr1(knonv) ! 1st Layer Dendricity/Spher. |
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| 102 | real G1agr2(knonv) ! 2nd Layer Dendricity/Spher. |
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| 103 | real G2agr1(knonv) ! 1st Layer Sphericity/Size |
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| 104 | real G2agr2(knonv) ! 2nd Layer Sphericity/Size |
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| 105 | real agagr1(knonv) ! 1st Layer Age |
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| 106 | real agagr2(knonv) ! 2nd Layer Age |
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| 107 | |
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| 108 | |
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| 109 | C +--DATA |
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| 110 | C + ==== |
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| 111 | |
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| 112 | data icemix / 0 / ! 0 ====> Agregated Snow+Ice=Snow |
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| 113 | data dzepsi / 0.0020/ ! Min single Layer Thickness |
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| 114 | data dzxmin / 0.0025/ ! Min accept.Layer Thickness |
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| 115 | c #EU data dz_min / 0.0050/ ! Min Local Layer Thickness < SMn |
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| 116 | data dz_min / 0.0040/ ! Min Local Layer Thickness < SMn |
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| 117 | data dz_max / 0.0300/ ! Min Gener. Layer Thickness |
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| 118 | C + CAUTION: dz_max > dz_min*2 is required ! Otherwise re-agregation is |
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| 119 | C + ! activated after splitting |
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| 120 | |
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| 121 | |
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| 122 | |
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| 123 | |
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| 124 | |
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| 125 | C +--Constrains Agregation of too thin Layers |
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| 126 | C + ================================================= |
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| 127 | |
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| 128 | C +--Search the thinest non-zero Layer |
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| 129 | C + ---------------------------------- |
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| 130 | |
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| 131 | DO ikl=1,knonv |
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| 132 | if(isnoSV(ikl)<=2) dz_min=max(0.0050,dz_min) |
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| 133 | |
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| 134 | dzepsi=0.0015 |
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| 135 | if(ro__SV(ikl,isnoSV(ikl))>920) dzepsi=0.0020 |
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| 136 | |
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| 137 | dzthin(ikl) = 0. ! Arbitrary unrealistic |
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| 138 | END DO ! Layer Thickness |
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| 139 | cXF |
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| 140 | DO ikl=1,knonv |
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| 141 | DO isn=1,isnoSV(ikl)-3 ! no agregation of 3 first snowlayers |
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| 142 | ! XF 04/07/2019 |
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| 143 | |
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| 144 | isno_n = isnoSV(ikl)-isn+1 ! Snow Normal.Profile |
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| 145 | iice_n = iiceSV(ikl)-isn ! Ice Normal.Profile |
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| 146 | iiceOK = min(1,max(0,iice_n +1)) ! Ice Switch |
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| 147 | ! #vz dz_ref(isn) = ! |
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| 148 | ! #vz. dz_min *((1-iiceOK)*isno_n*isno_n ! Theoretical Profile |
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| 149 | ! #vz. + iiceOK * 2**iice_n) ! |
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| 150 | ! #vz. /max(1,isnoSV(ikl)) ! |
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| 151 | dz_dif = max(zero, ! Actual Profile |
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| 152 | . dz_min ! |
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| 153 | . *((1-iiceOK)*isno_n*isno_n ! Theoretical Profile |
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| 154 | . + iiceOK *2. **iice_n) ! |
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| 155 | . - dzsnSV(ikl, isn) ) ! Actual Profile |
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| 156 | ! #vz dzwdif(isn) = dz_dif ! |
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| 157 | OKthin = max(zero, ! |
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| 158 | . sign(unun, ! |
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| 159 | . dz_dif-dzthin(ikl))) ! 1.=> New thinest Lay. |
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| 160 | . * max(0, ! 1 => .le. isnoSV |
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| 161 | . min(1, ! 1 => isn is in the |
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| 162 | . isnoSV(ikl)-isn +1 )) ! Snow Pack |
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| 163 | . * min(unun, ! |
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| 164 | ! |
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| 165 | ! 1st additional Condition to accept OKthin |
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| 166 | . max(zero, ! combination |
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| 167 | . sign(unun,G1snSV(ikl, isn ) ! G1 with same |
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| 168 | . *G1snSV(ikl,max(1,isn-1)))) ! sign => OK |
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| 169 | ! |
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| 170 | ! 2nd additional Condition to accept OKthin |
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| 171 | . + max(zero, ! G1>0 |
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| 172 | . sign(unun,G1snSV(ikl, isn ))) ! =>OK |
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| 173 | ! |
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| 174 | ! 3rd additional Condition to accept OKthin |
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| 175 | . + max(zero, ! dz too small |
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| 176 | . sign(unun,dzxmin ! =>OK |
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| 177 | . -dzsnSV(ikl, isn ))))! |
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| 178 | |
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| 179 | i_thin(ikl) = (1. - OKthin) * i_thin(ikl) ! Update thinest Lay. |
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| 180 | . + OKthin * isn ! Index |
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| 181 | dzthin(ikl) = (1. - OKthin) * dzthin(ikl) ! |
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| 182 | . + OKthin * dz_dif ! |
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| 183 | END DO |
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| 184 | END DO |
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| 185 | |
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| 186 | |
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| 187 | |
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| 188 | DO ikl=1,knonv |
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| 189 | DO isn=1,isnoSV(ikl) |
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| 190 | OKthin = max(zero, ! |
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| 191 | . sign(unun, ! |
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| 192 | . dz_min ! |
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| 193 | . -dzsnSV(ikl,isn))) ! |
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| 194 | . * max(zero, ! ON if dz > 0 |
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| 195 | . sign(unun, ! |
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| 196 | . dzsnSV(ikl,isn)-epsi)) ! |
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| 197 | . *min(1,max(0, ! Multiple Snow Lay. |
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| 198 | . min (1, ! Switch = 1 |
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| 199 | . isnoSV(ikl) ! if isno > iice + 1 |
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| 200 | . -iiceSV(ikl)-1)) ! |
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| 201 | C + ! |
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| 202 | . +int(max(zero, ! |
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| 203 | . sign(unun, ! |
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| 204 | . dzepsi ! Minimum accepted for |
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| 205 | . -dzsnSV(ikl,isn)))) ! 1 Snow Layer over Ice |
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| 206 | . *int(max(zero, ! ON if dz > 0 |
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| 207 | . sign(unun, ! |
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| 208 | . dzsnSV(ikl,isn)-epsi)))! |
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| 209 | . *(1 -min (abs(isnoSV(ikl) ! Switch = 1 |
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| 210 | . -iiceSV(ikl)-1),1)) ! if isno = iice + 1 |
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| 211 | C + ! |
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| 212 | . +max(0, ! Ice |
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| 213 | . min (1, ! Switch |
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| 214 | . iiceSV(ikl)+1-isn))) ! |
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| 215 | . *min(unun, ! |
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| 216 | . max(zero, ! combination |
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| 217 | . sign(unun,G1snSV(ikl, isn ) ! G1>0 + G1<0 |
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| 218 | . *G1snSV(ikl,max(1,isn-1)))) ! NO |
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| 219 | . + max(zero, ! |
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| 220 | . sign(unun,G1snSV(ikl, isn ))) ! |
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| 221 | . + max(zero, ! |
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| 222 | . sign(unun,dzxmin ! |
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| 223 | . -dzsnSV(ikl, isn ))))! |
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| 224 | i_thin(ikl) = (1. - OKthin) * i_thin(ikl) ! Update thinest Lay. |
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| 225 | . + OKthin * isn ! Index |
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| 226 | END DO |
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| 227 | END DO |
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| 228 | |
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| 229 | |
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| 230 | |
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| 231 | |
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| 232 | C + *************** |
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| 233 | call SISVAT_zCr |
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| 234 | C + *************** |
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| 235 | |
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| 236 | |
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| 237 | C +--Assign the 2 Layers to agregate |
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| 238 | C + ------------------------------- |
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| 239 | |
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| 240 | DO ikl=1,knonv |
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| 241 | isn = i_thin(ikl) |
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| 242 | if(LIndsv(ikl)>0) isn=min(nsno-1,isn) ! cXF |
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| 243 | isagr1(ikl) = istoSV(ikl,isn) |
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| 244 | isagr2(ikl) = istoSV(ikl,isn+LIndsv(ikl)) |
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| 245 | dzagr1(ikl) = dzsnSV(ikl,isn) |
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| 246 | dzagr2(ikl) = dzsnSV(ikl,isn+LIndsv(ikl)) |
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| 247 | T_agr1(ikl) = TsisSV(ikl,isn) |
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| 248 | T_agr2(ikl) = TsisSV(ikl,isn+LIndsv(ikl)) |
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| 249 | roagr1(ikl) = ro__SV(ikl,isn) |
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| 250 | roagr2(ikl) = ro__SV(ikl,isn+LIndsv(ikl)) |
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| 251 | etagr1(ikl) = eta_SV(ikl,isn) |
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| 252 | etagr2(ikl) = eta_SV(ikl,isn+LIndsv(ikl)) |
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| 253 | G1agr1(ikl) = G1snSV(ikl,isn) |
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| 254 | G1agr2(ikl) = G1snSV(ikl,isn+LIndsv(ikl)) |
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| 255 | G2agr1(ikl) = G2snSV(ikl,isn) |
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| 256 | G2agr2(ikl) = G2snSV(ikl,isn+LIndsv(ikl)) |
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| 257 | agagr1(ikl) = agsnSV(ikl,isn) |
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| 258 | agagr2(ikl) = agsnSV(ikl,isn+LIndsv(ikl)) |
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| 259 | LstLay = min(1,max( 0,isnoSV(ikl) -1)) ! 0 if single Layer |
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| 260 | isnoSV(ikl) = isnoSV(ikl) ! decrement isnoSV |
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| 261 | . -(1-LstLay)* max(zero, ! if downmost Layer |
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| 262 | . sign(unun,eps_21 ! < 1.e-21 m |
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| 263 | . -dzsnSV(ikl,1))) ! |
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| 264 | isnoSV(ikl) = max( 0, isnoSV(ikl) ) ! |
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| 265 | Agrege(ikl) = max(zero, ! |
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| 266 | . sign(unun,dz_min ! No Agregation |
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| 267 | . -dzagr1(ikl) )) ! if too thick Layer |
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| 268 | . *LstLay ! if a single Layer |
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| 269 | . * min( max(0 ,isnoSV(ikl)+1 ! if Agregation |
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| 270 | . -i_thin(ikl) ! with a Layer |
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| 271 | . -LIndsv(ikl) ),1) ! above the Pack |
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| 272 | |
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| 273 | WEagre(ikl) = 0. |
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| 274 | END DO |
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| 275 | |
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| 276 | |
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| 277 | DO ikl=1,knonv |
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| 278 | DO isn=1,isnoSV(ikl) |
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| 279 | WEagre(ikl) = WEagre(ikl) + ro__SV(ikl,isn)*dzsnSV(ikl,isn) |
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| 280 | . *min(1,max(0,i_thin(ikl)+1-isn)) |
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| 281 | ENDDO |
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| 282 | ENDDO |
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| 283 | |
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| 284 | |
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| 285 | C +--Agregates |
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| 286 | C + --------- |
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| 287 | |
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| 288 | C + *************** |
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| 289 | call SISVAT_zAg |
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| 290 | . (isagr1,isagr2,WEagre |
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| 291 | . ,dzagr1,dzagr2,T_agr1,T_agr2 |
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| 292 | . ,roagr1,roagr2,etagr1,etagr2 |
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| 293 | . ,G1agr1,G1agr2,G2agr1,G2agr2 |
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| 294 | . ,agagr1,agagr2,Agrege |
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| 295 | . ) |
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| 296 | C + *************** |
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| 297 | |
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| 298 | |
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| 299 | C +--Rearranges the Layers |
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| 300 | C + --------------------- |
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| 301 | |
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| 302 | C +--New (agregated) Snow layer |
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| 303 | C + ^^^^^^^^^^^^^^^^^^^^^^^^^^ |
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| 304 | DO ikl=1,knonv |
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| 305 | isn = i_thin(ikl) |
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| 306 | isn = min(isn,isn+LIndsv(ikl)) |
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| 307 | isnoSV(ikl) = max(0.,isnoSV(ikl) -Agrege(ikl)) |
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| 308 | iiceSV(ikl) = iiceSV(ikl) |
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| 309 | . -max(0,sign(1,iiceSV(ikl) -isn +icemix)) |
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| 310 | . *Agrege(ikl) |
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| 311 | . *max(0,sign(1,iiceSV(ikl) -1 )) |
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| 312 | istoSV(ikl,isn) = (1.-Agrege(ikl))*istoSV(ikl,isn) |
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| 313 | . + Agrege(ikl) *isagr1(ikl) |
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| 314 | dzsnSV(ikl,isn) = (1.-Agrege(ikl))*dzsnSV(ikl,isn) |
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| 315 | . + Agrege(ikl) *dzagr1(ikl) |
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| 316 | TsisSV(ikl,isn) = (1.-Agrege(ikl))*TsisSV(ikl,isn) |
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| 317 | . + Agrege(ikl) *T_agr1(ikl) |
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| 318 | ro__SV(ikl,isn) = (1.-Agrege(ikl))*ro__SV(ikl,isn) |
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| 319 | . + Agrege(ikl) *roagr1(ikl) |
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| 320 | eta_SV(ikl,isn) = (1.-Agrege(ikl))*eta_SV(ikl,isn) |
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| 321 | . + Agrege(ikl) *etagr1(ikl) |
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| 322 | G1snSV(ikl,isn) = (1.-Agrege(ikl))*G1snSV(ikl,isn) |
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| 323 | . + Agrege(ikl) *G1agr1(ikl) |
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| 324 | G2snSV(ikl,isn) = (1.-Agrege(ikl))*G2snSV(ikl,isn) |
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| 325 | . + Agrege(ikl) *G2agr1(ikl) |
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| 326 | agsnSV(ikl,isn) = (1.-Agrege(ikl))*agsnSV(ikl,isn) |
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| 327 | . + Agrege(ikl) *agagr1(ikl) |
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| 328 | END DO |
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| 329 | |
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| 330 | C +--Above |
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| 331 | C + ^^^^^ |
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| 332 | DO ikl=1,knonv |
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| 333 | isn1(ikl)=max(i_thin(ikl),i_thin(ikl)+LIndsv(ikl)) |
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| 334 | END DO |
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| 335 | DO i= 1,nsno-1 |
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| 336 | DO ikl=1,knonv |
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| 337 | staggr = min(1,max(0,i +1 -isn1(ikl) )) |
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| 338 | istoSV(ikl,i) = (1.-staggr )*istoSV(ikl,i ) |
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| 339 | . + staggr*((1.-Agrege(ikl))*istoSV(ikl,i ) |
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| 340 | . + Agrege(ikl) *istoSV(ikl,i+1)) |
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| 341 | dzsnSV(ikl,i) = (1.-staggr )*dzsnSV(ikl,i ) |
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| 342 | . + staggr*((1.-Agrege(ikl))*dzsnSV(ikl,i ) |
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| 343 | . + Agrege(ikl) *dzsnSV(ikl,i+1)) |
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| 344 | TsisSV(ikl,i) = (1.-staggr )*TsisSV(ikl,i ) |
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| 345 | . + staggr*((1.-Agrege(ikl))*TsisSV(ikl,i ) |
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| 346 | . + Agrege(ikl) *TsisSV(ikl,i+1)) |
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| 347 | ro__SV(ikl,i) = (1.-staggr )*ro__SV(ikl,i ) |
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| 348 | . + staggr*((1.-Agrege(ikl))*ro__SV(ikl,i ) |
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| 349 | . + Agrege(ikl) *ro__SV(ikl,i+1)) |
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| 350 | eta_SV(ikl,i) = (1.-staggr )*eta_SV(ikl,i ) |
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| 351 | . + staggr*((1.-Agrege(ikl))*eta_SV(ikl,i ) |
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| 352 | . + Agrege(ikl) *eta_SV(ikl,i+1)) |
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| 353 | G1snSV(ikl,i) = (1.-staggr )*G1snSV(ikl,i ) |
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| 354 | . + staggr*((1.-Agrege(ikl))*G1snSV(ikl,i ) |
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| 355 | . + Agrege(ikl) *G1snSV(ikl,i+1)) |
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| 356 | G2snSV(ikl,i) = (1.-staggr )*G2snSV(ikl,i ) |
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| 357 | . + staggr*((1.-Agrege(ikl))*G2snSV(ikl,i ) |
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| 358 | . + Agrege(ikl) *G2snSV(ikl,i+1)) |
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| 359 | agsnSV(ikl,i) = (1.-staggr )*agsnSV(ikl,i ) |
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| 360 | . + staggr*((1.-Agrege(ikl))*agsnSV(ikl,i ) |
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| 361 | . + Agrege(ikl) *agsnSV(ikl,i+1)) |
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| 362 | END DO |
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| 363 | END DO |
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| 364 | |
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| 365 | DO ikl=1,knonv |
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| 366 | isn = min(isnoSV(ikl) +1,nsno) |
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| 367 | istoSV(ikl,isn) = (1.-Agrege(ikl))*istoSV(ikl,isn) |
|---|
| 368 | dzsnSV(ikl,isn) = (1.-Agrege(ikl))*dzsnSV(ikl,isn) |
|---|
| 369 | TsisSV(ikl,isn) = (1.-Agrege(ikl))*TsisSV(ikl,isn) |
|---|
| 370 | ro__SV(ikl,isn) = (1.-Agrege(ikl))*ro__SV(ikl,isn) |
|---|
| 371 | eta_SV(ikl,isn) = (1.-Agrege(ikl))*eta_SV(ikl,isn) |
|---|
| 372 | G1snSV(ikl,isn) = (1.-Agrege(ikl))*G1snSV(ikl,isn) |
|---|
| 373 | G2snSV(ikl,isn) = (1.-Agrege(ikl))*G2snSV(ikl,isn) |
|---|
| 374 | agsnSV(ikl,isn) = (1.-Agrege(ikl))*agsnSV(ikl,isn) |
|---|
| 375 | END DO |
|---|
| 376 | |
|---|
| 377 | |
|---|
| 378 | |
|---|
| 379 | |
|---|
| 380 | C +--Constrains Splitting of too thick Layers |
|---|
| 381 | C + ================================================= |
|---|
| 382 | |
|---|
| 383 | |
|---|
| 384 | C +--Search the thickest non-zero Layer |
|---|
| 385 | C + ---------------------------------- |
|---|
| 386 | |
|---|
| 387 | DO ikl=1,knonv |
|---|
| 388 | dzthin(ikl) = 0. ! Arbitrary unrealistic |
|---|
| 389 | END DO |
|---|
| 390 | DO ikl=1,knonv |
|---|
| 391 | DO isn=1,isnoSV(ikl) |
|---|
| 392 | isno_n = isnoSV(ikl)-isn+1 ! Snow Normal.Profile |
|---|
| 393 | iice_n = iiceSV(ikl)-isn ! Ice Normal.Profile |
|---|
| 394 | iiceOK = min(1,max(0,iice_n +1)) ! Ice Switch |
|---|
| 395 | dz_dif =( dzsnSV(ikl,isn) ! Actual Profile |
|---|
| 396 | . - dz_max *((1-iiceOK)*isno_n*isno_n ! Theoretical Profile |
|---|
| 397 | . + iiceOK *2. **iice_n) ) ! |
|---|
| 398 | . /max(dzsnSV(ikl,isn),epsi) ! |
|---|
| 399 | OKthin = max(zero, ! |
|---|
| 400 | . sign(unun, ! |
|---|
| 401 | . dz_dif-dzthin(ikl))) ! 1.=>New thickest Lay. |
|---|
| 402 | . * max(0, ! 1 =>.le. isnoSV |
|---|
| 403 | . min(1, ! |
|---|
| 404 | . isnoSV(ikl)-isn +1 )) ! |
|---|
| 405 | i_thin(ikl) = (1. - OKthin) * i_thin(ikl) ! Update thickest Lay. |
|---|
| 406 | . + OKthin * isn ! Index |
|---|
| 407 | dzthin(ikl) = (1. - OKthin) * dzthin(ikl) ! |
|---|
| 408 | . + OKthin * dz_dif ! |
|---|
| 409 | END DO |
|---|
| 410 | |
|---|
| 411 | isn=max(1,isnoSV(ikl)-3) |
|---|
| 412 | if(dzsnSV(ikl,isn)>0.30) then ! surface layer > 30cm |
|---|
| 413 | i_thin(ikl) = isn ! XF 04/07/2019 |
|---|
| 414 | dzthin(ikl) = dzsnSV(ikl,isn) |
|---|
| 415 | endif |
|---|
| 416 | |
|---|
| 417 | isn=max(1,isnoSV(ikl)-2) |
|---|
| 418 | if(dzsnSV(ikl,isn)>0.10) then ! surface layer > 10cm |
|---|
| 419 | i_thin(ikl) = isn ! XF 04/07/2019 |
|---|
| 420 | dzthin(ikl) = dzsnSV(ikl,isn) |
|---|
| 421 | endif |
|---|
| 422 | |
|---|
| 423 | isn=max(1,isnoSV(ikl)-1) |
|---|
| 424 | if(dzsnSV(ikl,isn)>0.05) then ! surface layer > 5cm |
|---|
| 425 | i_thin(ikl) = isn ! XF 04/07/2019 |
|---|
| 426 | dzthin(ikl) = dzsnSV(ikl,isn) |
|---|
| 427 | endif |
|---|
| 428 | |
|---|
| 429 | isn=max(1,isnoSV(ikl)) |
|---|
| 430 | if(dzsnSV(ikl,isn)>0.02) then ! surface layer > 2cm |
|---|
| 431 | i_thin(ikl) = isn ! XF 04/07/2019 |
|---|
| 432 | dzthin(ikl) = dzsnSV(ikl,isn) |
|---|
| 433 | endif |
|---|
| 434 | |
|---|
| 435 | END DO |
|---|
| 436 | |
|---|
| 437 | DO ikl=1,knonv |
|---|
| 438 | ThickL = max(zero, ! 1. => a too thick |
|---|
| 439 | . sign(unun,dzthin(ikl) ! Layer exists |
|---|
| 440 | . -epsi )) ! |
|---|
| 441 | . * max(0,1-max(0 , isnoSV(ikl) ! No spliting allowed |
|---|
| 442 | . -nsno+1 )) ! if isno > nsno - 1 |
|---|
| 443 | Agrege(ikl) = ThickL ! 1. => effective split |
|---|
| 444 | . * max(0,1-max(0 , NLaysv(ikl) ! |
|---|
| 445 | . +isnoSV(ikl) ! |
|---|
| 446 | . -nsno+1 )) ! |
|---|
| 447 | NLay_s(ikl) = ThickL ! Agregation |
|---|
| 448 | . * max(0,1-max(0 , NLaysv(ikl) ! to allow Splitting |
|---|
| 449 | . +isnoSV(ikl) ! at next Time Step |
|---|
| 450 | . -nsno )) ! |
|---|
| 451 | . -Agrege(ikl) ! |
|---|
| 452 | NLay_s(ikl) = max(0 , NLay_s(ikl)) ! Agregation effective |
|---|
| 453 | END DO |
|---|
| 454 | |
|---|
| 455 | |
|---|
| 456 | C +--Rearranges the Layers |
|---|
| 457 | C + --------------------- |
|---|
| 458 | |
|---|
| 459 | DO isn=nsno,2,-1 |
|---|
| 460 | DO ikl=1,knonv |
|---|
| 461 | IF (Agrege(ikl)>0..AND.i_thin(ikl)<isnoSV(ikl)) THEN |
|---|
| 462 | staggr = min(1,max(0,isn-i_thin(ikl) -1)) |
|---|
| 463 | . * min(1,max(0, isnoSV(ikl)-isn+2)) |
|---|
| 464 | istoSV(ikl,isn) = staggr * istoSV(ikl ,isn-1) |
|---|
| 465 | . + (1. - staggr) * istoSV(ikl ,isn ) |
|---|
| 466 | dzsnSV(ikl,isn) = staggr * dzsnSV(ikl ,isn-1) |
|---|
| 467 | . + (1. - staggr) * dzsnSV(ikl ,isn ) |
|---|
| 468 | TsisSV(ikl,isn) = staggr * TsisSV(ikl ,isn-1) |
|---|
| 469 | . + (1. - staggr) * TsisSV(ikl ,isn ) |
|---|
| 470 | ro__SV(ikl,isn) = staggr * ro__SV(ikl ,isn-1) |
|---|
| 471 | . + (1. - staggr) * ro__SV(ikl ,isn ) |
|---|
| 472 | eta_SV(ikl,isn) = staggr * eta_SV(ikl ,isn-1) |
|---|
| 473 | . + (1. - staggr) * eta_SV(ikl ,isn ) |
|---|
| 474 | G1snSV(ikl,isn) = staggr * G1snSV(ikl ,isn-1) |
|---|
| 475 | . + (1. - staggr) * G1snSV(ikl ,isn ) |
|---|
| 476 | G2snSV(ikl,isn) = staggr * G2snSV(ikl ,isn-1) |
|---|
| 477 | . + (1. - staggr) * G2snSV(ikl ,isn ) |
|---|
| 478 | agsnSV(ikl,isn) = staggr * agsnSV(ikl ,isn-1) |
|---|
| 479 | . + (1. - staggr) * agsnSV(ikl ,isn ) |
|---|
| 480 | END IF |
|---|
| 481 | END DO |
|---|
| 482 | END DO |
|---|
| 483 | |
|---|
| 484 | DO ikl=1,knonv |
|---|
| 485 | isn = i_thin(ikl) |
|---|
| 486 | dzsnSV(ikl,isn) = 0.5*Agrege(ikl) *dzsnSV(ikl,isn) |
|---|
| 487 | . + (1.-Agrege(ikl))*dzsnSV(ikl,isn) |
|---|
| 488 | |
|---|
| 489 | isn = min(i_thin(ikl) +1,nsno) |
|---|
| 490 | istoSV(ikl,isn) = Agrege(ikl) *istoSV(ikl,isn-1) |
|---|
| 491 | . + (1.-Agrege(ikl))*istoSV(ikl,isn) |
|---|
| 492 | dzsnSV(ikl,isn) = Agrege(ikl) *dzsnSV(ikl,isn-1) |
|---|
| 493 | . + (1.-Agrege(ikl))*dzsnSV(ikl,isn) |
|---|
| 494 | TsisSV(ikl,isn) = Agrege(ikl) *TsisSV(ikl,isn-1) |
|---|
| 495 | . + (1.-Agrege(ikl))*TsisSV(ikl,isn) |
|---|
| 496 | ro__SV(ikl,isn) = Agrege(ikl) *ro__SV(ikl,isn-1) |
|---|
| 497 | . + (1.-Agrege(ikl))*ro__SV(ikl,isn) |
|---|
| 498 | eta_SV(ikl,isn) = Agrege(ikl) *eta_SV(ikl,isn-1) |
|---|
| 499 | . + (1.-Agrege(ikl))*eta_SV(ikl,isn) |
|---|
| 500 | G1snSV(ikl,isn) = Agrege(ikl) *G1snSV(ikl,isn-1) |
|---|
| 501 | . + (1.-Agrege(ikl))*G1snSV(ikl,isn) |
|---|
| 502 | G2snSV(ikl,isn) = Agrege(ikl) *G2snSV(ikl,isn-1) |
|---|
| 503 | . + (1.-Agrege(ikl))*G2snSV(ikl,isn) |
|---|
| 504 | agsnSV(ikl,isn) = Agrege(ikl) *agsnSV(ikl,isn-1) |
|---|
| 505 | . + (1.-Agrege(ikl))*agsnSV(ikl,isn) |
|---|
| 506 | isnoSV(ikl) = min(Agrege(ikl) +isnoSV(ikl),real(nsno)) |
|---|
| 507 | iiceSV(ikl) = iiceSV(ikl) |
|---|
| 508 | . + Agrege(ikl) *max(0,sign(1,iiceSV(ikl) |
|---|
| 509 | . -isn +icemix)) |
|---|
| 510 | . *max(0,sign(1,iiceSV(ikl) |
|---|
| 511 | . -1 )) |
|---|
| 512 | END DO |
|---|
| 513 | |
|---|
| 514 | |
|---|
| 515 | C +--Constrains Agregation in case of too much Layers |
|---|
| 516 | C + ================================================= |
|---|
| 517 | |
|---|
| 518 | C +--Search the thinest non-zero Layer |
|---|
| 519 | C + ----------------------------------- |
|---|
| 520 | |
|---|
| 521 | |
|---|
| 522 | |
|---|
| 523 | DO ikl=1,knonv |
|---|
| 524 | dzthin(ikl) = 0. ! Arbitrary unrealistic |
|---|
| 525 | END DO ! Layer Thickness |
|---|
| 526 | DO ikl=1,knonv |
|---|
| 527 | DO isn=1,isnoSV(ikl)-3 ! no agregation of 3 first snowlayers |
|---|
| 528 | ! XF 04/07/2019 |
|---|
| 529 | |
|---|
| 530 | isno_n = isnoSV(ikl)-isn+1 ! Snow Normal.Profile |
|---|
| 531 | iice_n = iiceSV(ikl)-isn ! Ice Normal.Profile |
|---|
| 532 | iiceOK = min(1,max(0,iice_n +1)) ! Ice Switch |
|---|
| 533 | ! #vz dz_ref(isn) = ! |
|---|
| 534 | ! #vz. dz_min *((1-iiceOK)*isno_n*isno_n ! Theoretical Profile |
|---|
| 535 | ! #vz. + iiceOK * 2**iice_n) ! |
|---|
| 536 | ! #vz. /max(1,isnoSV(ikl)) ! |
|---|
| 537 | dz_dif = dz_min ! Actual Profile |
|---|
| 538 | . - dzsnSV(ikl ,isn) ! |
|---|
| 539 | . /max(epsi,((1-iiceOK)*isno_n*isno_n ! Theoretical Profile |
|---|
| 540 | . + iiceOK *2. **iice_n)) ! |
|---|
| 541 | ! #vz dzwdif(isn) = dz_dif ! |
|---|
| 542 | OKthin = max(zero, ! |
|---|
| 543 | . sign(unun, ! |
|---|
| 544 | . dz_dif - dzthin(ikl)))! 1.=> New thinest Lay. |
|---|
| 545 | . * max(0, ! 1 => .le. isnoSV |
|---|
| 546 | . min(1, ! |
|---|
| 547 | . isnoSV(ikl)-isn +1 )) ! |
|---|
| 548 | i_thin(ikl) = (1. - OKthin) * i_thin(ikl) ! Update thinest Lay. |
|---|
| 549 | . + OKthin * isn ! Index |
|---|
| 550 | dzthin(ikl) = (1. - OKthin) * dzthin(ikl) ! |
|---|
| 551 | . + OKthin * dz_dif ! |
|---|
| 552 | |
|---|
| 553 | |
|---|
| 554 | END DO |
|---|
| 555 | END DO |
|---|
| 556 | |
|---|
| 557 | |
|---|
| 558 | |
|---|
| 559 | |
|---|
| 560 | |
|---|
| 561 | C +--Index of the contiguous Layer to agregate |
|---|
| 562 | C + ----------------------------------------- |
|---|
| 563 | |
|---|
| 564 | C + *************** |
|---|
| 565 | call SISVAT_zCr |
|---|
| 566 | C + *************** |
|---|
| 567 | |
|---|
| 568 | |
|---|
| 569 | C +--Assign the 2 Layers to agregate |
|---|
| 570 | C + ------------------------------- |
|---|
| 571 | |
|---|
| 572 | DO ikl=1,knonv |
|---|
| 573 | isn = i_thin(ikl) |
|---|
| 574 | if(LIndsv(ikl)>0) isn=min(isn, nsno-1) !cXF |
|---|
| 575 | isagr1(ikl) = istoSV(ikl,isn) |
|---|
| 576 | isagr2(ikl) = istoSV(ikl,isn+LIndsv(ikl)) |
|---|
| 577 | dzagr1(ikl) = dzsnSV(ikl,isn) |
|---|
| 578 | dzagr2(ikl) = dzsnSV(ikl,isn+LIndsv(ikl)) |
|---|
| 579 | T_agr1(ikl) = TsisSV(ikl,isn) |
|---|
| 580 | T_agr2(ikl) = TsisSV(ikl,isn+LIndsv(ikl)) |
|---|
| 581 | roagr1(ikl) = ro__SV(ikl,isn) |
|---|
| 582 | roagr2(ikl) = ro__SV(ikl,isn+LIndsv(ikl)) |
|---|
| 583 | etagr1(ikl) = eta_SV(ikl,isn) |
|---|
| 584 | etagr2(ikl) = eta_SV(ikl,isn+LIndsv(ikl)) |
|---|
| 585 | G1agr1(ikl) = G1snSV(ikl,isn) |
|---|
| 586 | G1agr2(ikl) = G1snSV(ikl,isn+LIndsv(ikl)) |
|---|
| 587 | G2agr1(ikl) = G2snSV(ikl,isn) |
|---|
| 588 | G2agr2(ikl) = G2snSV(ikl,isn+LIndsv(ikl)) |
|---|
| 589 | agagr1(ikl) = agsnSV(ikl,isn) |
|---|
| 590 | agagr2(ikl) = agsnSV(ikl,isn+LIndsv(ikl)) |
|---|
| 591 | LstLay = min(1,max( 0, isnoSV(ikl)-1 )) |
|---|
| 592 | Agrege(ikl) = min(1, |
|---|
| 593 | . max(0, |
|---|
| 594 | . NLaysv(ikl) +isnoSV(ikl)-nsno |
|---|
| 595 | . +NLay_s(ikl) ) |
|---|
| 596 | . *LstLay ) |
|---|
| 597 | |
|---|
| 598 | C + minimum uppermost layer thickness to guarantee a correct reproduction of the snow |
|---|
| 599 | C + atmosphere coupling |
|---|
| 600 | if(dzsnSV(ikl,max(1,isnoSV(ikl)-0))>0.02 .or. ! surface layers> 2-5-10 |
|---|
| 601 | . dzsnSV(ikl,max(1,isnoSV(ikl)-1))>0.05 .or. ! XF 04/07/2019 |
|---|
| 602 | . dzsnSV(ikl,max(1,isnoSV(ikl)-2))>0.10 .or. |
|---|
| 603 | . dzsnSV(ikl,max(1,isnoSV(ikl)-3))>0.30 )then |
|---|
| 604 | Agrege(ikl) = min(1, |
|---|
| 605 | . max(0, |
|---|
| 606 | . NLaysv(ikl) +isnoSV(ikl)+1-nsno ! nsno-1 layers ma |
|---|
| 607 | . +NLay_s(ikl) ) |
|---|
| 608 | . *LstLay ) |
|---|
| 609 | endif |
|---|
| 610 | |
|---|
| 611 | isnoSV(ikl) = isnoSV(ikl) |
|---|
| 612 | . -(1-LstLay)*max(zero, |
|---|
| 613 | . sign(unun, eps_21 |
|---|
| 614 | . -dzsnSV(ikl,1) )) |
|---|
| 615 | isnoSV(ikl) =max( 0, isnoSV(ikl) ) |
|---|
| 616 | |
|---|
| 617 | WEagre(ikl) = 0. |
|---|
| 618 | END DO |
|---|
| 619 | |
|---|
| 620 | DO isn=1,nsno |
|---|
| 621 | DO ikl=1,knonv |
|---|
| 622 | WEagre(ikl) = WEagre(ikl) + ro__SV(ikl,isn)*dzsnSV(ikl,isn) |
|---|
| 623 | . *min(1,max(0,i_thin(ikl)+1-isn)) |
|---|
| 624 | ENDDO |
|---|
| 625 | ENDDO |
|---|
| 626 | |
|---|
| 627 | C +--Agregates |
|---|
| 628 | C + --------- |
|---|
| 629 | |
|---|
| 630 | C + *************** |
|---|
| 631 | call SISVAT_zAg |
|---|
| 632 | . (isagr1,isagr2,WEagre |
|---|
| 633 | . ,dzagr1,dzagr2,T_agr1,T_agr2 |
|---|
| 634 | . ,roagr1,roagr2,etagr1,etagr2 |
|---|
| 635 | . ,G1agr1,G1agr2,G2agr1,G2agr2 |
|---|
| 636 | . ,agagr1,agagr2,Agrege |
|---|
| 637 | . ) |
|---|
| 638 | C + *************** |
|---|
| 639 | |
|---|
| 640 | |
|---|
| 641 | C +--Rearranges the Layers |
|---|
| 642 | C + --------------------- |
|---|
| 643 | |
|---|
| 644 | C +--New (agregated) Snow layer |
|---|
| 645 | C + ^^^^^^^^^^^^^^^^^^^^^^^^^^ |
|---|
| 646 | DO ikl=1,knonv |
|---|
| 647 | isn = i_thin(ikl) |
|---|
| 648 | isn = min(isn,isn+LIndsv(ikl)) |
|---|
| 649 | isnoSV(ikl) = max(0.,isnoSV(ikl) -Agrege(ikl)) |
|---|
| 650 | iiceSV(ikl) = iiceSV(ikl) |
|---|
| 651 | . -max(0,sign(1,iiceSV(ikl) -isn +icemix)) |
|---|
| 652 | . *Agrege(ikl) |
|---|
| 653 | . *max(0,sign(1,iiceSV(ikl) -1 )) |
|---|
| 654 | istoSV(ikl,isn) = (1.-Agrege(ikl))*istoSV(ikl,isn) |
|---|
| 655 | . + Agrege(ikl) *isagr1(ikl) |
|---|
| 656 | dzsnSV(ikl,isn) = (1.-Agrege(ikl))*dzsnSV(ikl,isn) |
|---|
| 657 | . + Agrege(ikl) *dzagr1(ikl) |
|---|
| 658 | TsisSV(ikl,isn) = (1.-Agrege(ikl))*TsisSV(ikl,isn) |
|---|
| 659 | . + Agrege(ikl) *T_agr1(ikl) |
|---|
| 660 | ro__SV(ikl,isn) = (1.-Agrege(ikl))*ro__SV(ikl,isn) |
|---|
| 661 | . + Agrege(ikl) *roagr1(ikl) |
|---|
| 662 | eta_SV(ikl,isn) = (1.-Agrege(ikl))*eta_SV(ikl,isn) |
|---|
| 663 | . + Agrege(ikl) *etagr1(ikl) |
|---|
| 664 | G1snSV(ikl,isn) = (1.-Agrege(ikl))*G1snSV(ikl,isn) |
|---|
| 665 | . + Agrege(ikl) *G1agr1(ikl) |
|---|
| 666 | G2snSV(ikl,isn) = (1.-Agrege(ikl))*G2snSV(ikl,isn) |
|---|
| 667 | . + Agrege(ikl) *G2agr1(ikl) |
|---|
| 668 | agsnSV(ikl,isn) = (1.-Agrege(ikl))*agsnSV(ikl,isn) |
|---|
| 669 | . + Agrege(ikl) *agagr1(ikl) |
|---|
| 670 | END DO |
|---|
| 671 | |
|---|
| 672 | C +--Above |
|---|
| 673 | C + ^^^^^ |
|---|
| 674 | DO ikl=1,knonv |
|---|
| 675 | isn1(ikl)=max(i_thin(ikl),i_thin(ikl)+LIndsv(ikl)) |
|---|
| 676 | END DO |
|---|
| 677 | DO i= 1,nsno-1 |
|---|
| 678 | DO ikl=1,knonv |
|---|
| 679 | staggr = min(1,max(0,i +1 -isn1(ikl) )) |
|---|
| 680 | istoSV(ikl,i) = (1.-staggr )*istoSV(ikl,i ) |
|---|
| 681 | . + staggr*((1.-Agrege(ikl))*istoSV(ikl,i ) |
|---|
| 682 | . + Agrege(ikl) *istoSV(ikl,i+1)) |
|---|
| 683 | dzsnSV(ikl,i) = (1.-staggr )*dzsnSV(ikl,i ) |
|---|
| 684 | . + staggr*((1.-Agrege(ikl))*dzsnSV(ikl,i ) |
|---|
| 685 | . + Agrege(ikl) *dzsnSV(ikl,i+1)) |
|---|
| 686 | TsisSV(ikl,i) = (1.-staggr )*TsisSV(ikl,i ) |
|---|
| 687 | . + staggr*((1.-Agrege(ikl))*TsisSV(ikl,i ) |
|---|
| 688 | . + Agrege(ikl) *TsisSV(ikl,i+1)) |
|---|
| 689 | ro__SV(ikl,i) = (1.-staggr )*ro__SV(ikl,i ) |
|---|
| 690 | . + staggr*((1.-Agrege(ikl))*ro__SV(ikl,i ) |
|---|
| 691 | . + Agrege(ikl) *ro__SV(ikl,i+1)) |
|---|
| 692 | eta_SV(ikl,i) = (1.-staggr )*eta_SV(ikl,i ) |
|---|
| 693 | . + staggr*((1.-Agrege(ikl))*eta_SV(ikl,i ) |
|---|
| 694 | . + Agrege(ikl) *eta_SV(ikl,i+1)) |
|---|
| 695 | G1snSV(ikl,i) = (1.-staggr )*G1snSV(ikl,i ) |
|---|
| 696 | . + staggr*((1.-Agrege(ikl))*G1snSV(ikl,i ) |
|---|
| 697 | . + Agrege(ikl) *G1snSV(ikl,i+1)) |
|---|
| 698 | G2snSV(ikl,i) = (1.-staggr )*G2snSV(ikl,i ) |
|---|
| 699 | . + staggr*((1.-Agrege(ikl))*G2snSV(ikl,i ) |
|---|
| 700 | . + Agrege(ikl) *G2snSV(ikl,i+1)) |
|---|
| 701 | agsnSV(ikl,i) = (1.-staggr )*agsnSV(ikl,i ) |
|---|
| 702 | . + staggr*((1.-Agrege(ikl))*agsnSV(ikl,i ) |
|---|
| 703 | . + Agrege(ikl) *agsnSV(ikl,i+1)) |
|---|
| 704 | END DO |
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| 705 | END DO |
|---|
| 706 | |
|---|
| 707 | DO ikl=1,knonv |
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| 708 | isn = min(isnoSV(ikl) +1,nsno) |
|---|
| 709 | istoSV(ikl,isn) = (1.-Agrege(ikl))*istoSV(ikl,isn) |
|---|
| 710 | dzsnSV(ikl,isn) = (1.-Agrege(ikl))*dzsnSV(ikl,isn) |
|---|
| 711 | TsisSV(ikl,isn) = (1.-Agrege(ikl))*TsisSV(ikl,isn) |
|---|
| 712 | ro__SV(ikl,isn) = (1.-Agrege(ikl))*ro__SV(ikl,isn) |
|---|
| 713 | eta_SV(ikl,isn) = (1.-Agrege(ikl))*eta_SV(ikl,isn) |
|---|
| 714 | G1snSV(ikl,isn) = (1.-Agrege(ikl))*G1snSV(ikl,isn) |
|---|
| 715 | G2snSV(ikl,isn) = (1.-Agrege(ikl))*G2snSV(ikl,isn) |
|---|
| 716 | agsnSV(ikl,isn) = (1.-Agrege(ikl))*agsnSV(ikl,isn) |
|---|
| 717 | END DO |
|---|
| 718 | |
|---|
| 719 | |
|---|
| 720 | C +--Search new Ice/Snow Interface (option II in MAR) |
|---|
| 721 | C + =============================================== |
|---|
| 722 | |
|---|
| 723 | IF (ok_zsn_ii) THEN |
|---|
| 724 | |
|---|
| 725 | DO ikl=1,knonv |
|---|
| 726 | iiceSV(ikl) = 0 |
|---|
| 727 | END DO |
|---|
| 728 | |
|---|
| 729 | DO ikl=1,knonv |
|---|
| 730 | DO isn=1,isnoSV(ikl) |
|---|
| 731 | OK_ICE = max(zero,sign(unun,ro__SV(ikl,isn)-ro_ice+20.)) |
|---|
| 732 | . * max(zero,sign(unun,dzsnSV(ikl,isn)-epsi)) |
|---|
| 733 | iiceSV(ikl) = (1.-OK_ICE) *iiceSV(ikl) |
|---|
| 734 | . + OK_ICE *isn |
|---|
| 735 | END DO |
|---|
| 736 | END DO |
|---|
| 737 | |
|---|
| 738 | END IF |
|---|
| 739 | |
|---|
| 740 | return |
|---|
| 741 | end |
|---|
