1 | |
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2 | |
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3 | SUBROUTINE SISVAT_zSn |
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4 | |
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5 | ! +------------------------------------------------------------------------+ |
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6 | ! | MAR SISVAT_zSn 12-07-2019 MAR | |
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7 | ! | SubRoutine SISVAT_zSn manages the Snow Pack vertical Discretization | |
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8 | ! | | |
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9 | ! +------------------------------------------------------------------------+ |
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10 | ! | | |
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11 | ! | PARAMETERS: knonv: 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 / NLaysv = New Snow Layer Switch | |
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16 | ! | OUTPUT: isnoSV = total Nb of Ice/Snow Layers | |
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17 | ! | ^^^^^^ ispiSV = 0,...,nsno: Uppermost Superimposed Ice Layer | |
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18 | ! | iiceSV = total Nb of Ice Layers | |
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19 | ! | istoSV = 0,...,5 : Snow History (see istdSV data) | |
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20 | ! | | |
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21 | ! | INPUT / TsisSV : Soil/Ice Temperatures (layers -nsol,-nsol+1,..,0)| |
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22 | ! | OUTPUT: & Snow Temperatures (layers 1,2,...,nsno) [K] | |
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23 | ! | ^^^^^^ ro__SV : Soil/Snow Volumic Mass [kg/m3] | |
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24 | ! | eta_SV : Soil/Snow Water Content [m3/m3] | |
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25 | ! | dzsnSV : Snow Layer Thickness [m] | |
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26 | ! | G1snSV : Dendricity (<0) or Sphericity (>0) of Snow Layer | |
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27 | ! | G2snSV : Sphericity (>0) or Size of Snow Layer | |
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28 | ! | agsnSV : Snow Age [day] | |
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29 | ! | | |
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30 | ! | METHOD: 1) Agregate the thinest Snow Layer | |
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31 | ! | ^^^^^^ if a new Snow Layer has been precipitated (NLaysv = 1) | |
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32 | ! | 2) Divide a too thick Snow Layer except | |
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33 | ! | if the maximum Number of Layer is reached | |
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34 | ! | in this case forces NLay_s = 1 | |
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35 | ! | 3) Agregate the thinest Snow Layer | |
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36 | ! | in order to divide a too thick Snow Layer | |
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37 | ! | at next Time Step when NLay_s = 1 | |
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38 | ! | | |
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39 | ! +------------------------------------------------------------------------+ |
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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 | ! +--Global Variables |
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45 | ! + ================ |
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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 | ! +--Internal Variables |
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60 | ! + ================== |
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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 | ! + ! 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 | ! +--DATA |
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110 | ! + ==== |
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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 | ! #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 | ! + CAUTION: dz_max > dz_min*2 is required ! Otherwise re-agregation is |
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119 | ! + ! 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 | ! +--Constrains Agregation of too thin Layers |
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126 | ! + ================================================= |
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127 | |
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128 | ! +--Search the thinest non-zero Layer |
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129 | ! + ---------------------------------- |
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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 | !XF |
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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 | ! + ! |
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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 | ! + ! |
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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 | ! + *************** |
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233 | CALL SISVAT_zCr |
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234 | ! + *************** |
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235 | |
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236 | |
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237 | ! +--Assign the 2 Layers to agregate |
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238 | ! + ------------------------------- |
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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 | ! +--Agregates |
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286 | ! + --------- |
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287 | |
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288 | ! + *************** |
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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 | ! + *************** |
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297 | |
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298 | |
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299 | ! +--Rearranges the Layers |
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300 | ! + --------------------- |
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301 | |
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302 | ! +--New (agregated) Snow layer |
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303 | ! + ^^^^^^^^^^^^^^^^^^^^^^^^^^ |
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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 | ! +--Above |
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331 | ! + ^^^^^ |
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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) |
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368 | dzsnSV(ikl,isn) = (1.-Agrege(ikl))*dzsnSV(ikl,isn) |
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369 | TsisSV(ikl,isn) = (1.-Agrege(ikl))*TsisSV(ikl,isn) |
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370 | ro__SV(ikl,isn) = (1.-Agrege(ikl))*ro__SV(ikl,isn) |
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371 | eta_SV(ikl,isn) = (1.-Agrege(ikl))*eta_SV(ikl,isn) |
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372 | G1snSV(ikl,isn) = (1.-Agrege(ikl))*G1snSV(ikl,isn) |
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373 | G2snSV(ikl,isn) = (1.-Agrege(ikl))*G2snSV(ikl,isn) |
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374 | agsnSV(ikl,isn) = (1.-Agrege(ikl))*agsnSV(ikl,isn) |
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375 | END DO |
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376 | |
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377 | |
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378 | |
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379 | |
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380 | ! +--Constrains Splitting of too thick Layers |
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381 | ! + ================================================= |
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382 | |
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383 | |
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384 | ! +--Search the thickest non-zero Layer |
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385 | ! + ---------------------------------- |
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386 | |
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387 | DO ikl=1,knonv |
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388 | dzthin(ikl) = 0. ! Arbitrary unrealistic |
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389 | END DO |
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390 | DO ikl=1,knonv |
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391 | DO isn=1,isnoSV(ikl) |
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392 | isno_n = isnoSV(ikl)-isn+1 ! Snow Normal.Profile |
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393 | iice_n = iiceSV(ikl)-isn ! Ice Normal.Profile |
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394 | iiceOK = min(1,max(0,iice_n +1)) ! Ice Switch |
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395 | dz_dif =( dzsnSV(ikl,isn) & ! Actual Profile |
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396 | - dz_max *((1-iiceOK)*isno_n*isno_n & ! Theoretical Profile |
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397 | + iiceOK *2. **iice_n) ) & ! |
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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 | ! +--Rearranges the Layers |
---|
457 | ! + --------------------- |
---|
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 | ! +--Constrains Agregation in case of too much Layers |
---|
516 | ! + ================================================= |
---|
517 | |
---|
518 | ! +--Search the thinest non-zero Layer |
---|
519 | ! + ----------------------------------- |
---|
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 | ! +--Index of the contiguous Layer to agregate |
---|
562 | ! + ----------------------------------------- |
---|
563 | |
---|
564 | ! + *************** |
---|
565 | CALL SISVAT_zCr |
---|
566 | ! + *************** |
---|
567 | |
---|
568 | |
---|
569 | ! +--Assign the 2 Layers to agregate |
---|
570 | ! + ------------------------------- |
---|
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 | ! + minimum uppermost layer thickness to guarantee a correct reproduction of the snow |
---|
599 | ! + 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 | ! +--Agregates |
---|
628 | ! + --------- |
---|
629 | |
---|
630 | ! + *************** |
---|
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 | ! + *************** |
---|
639 | |
---|
640 | |
---|
641 | ! +--Rearranges the Layers |
---|
642 | ! + --------------------- |
---|
643 | |
---|
644 | ! +--New (agregated) Snow layer |
---|
645 | ! + ^^^^^^^^^^^^^^^^^^^^^^^^^^ |
---|
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 | ! +--Above |
---|
673 | ! + ^^^^^ |
---|
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 |
---|
705 | END DO |
---|
706 | |
---|
707 | DO ikl=1,knonv |
---|
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 | ! +--Search new Ice/Snow Interface (option II in MAR) |
---|
721 | ! + =============================================== |
---|
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 | |
---|
741 | END SUBROUTINE sisvat_zsn |
---|