1 | subroutine lwb (kdlon,kflev,tlev,tlay,dt0 |
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2 | . ,bsurf,btop,blay,blev,dblay,dbsublay) |
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3 | |
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4 | c---------------------------------------------------------------------- |
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5 | c LWB computes the planck function and gradient |
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6 | c from a polynomial development of planck function |
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7 | c---------------------------------------------------------------------- |
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8 | |
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9 | use dimradmars_mod, only: ndlon, ndlo2, nir |
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10 | use yomlw_h, only: nlaylte, xi , tstand, xp |
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11 | implicit none |
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12 | |
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13 | c---------------------------------------------------------------------- |
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14 | c 0.1 arguments |
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15 | c --------- |
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16 | c inputs: |
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17 | c ------- |
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18 | integer kdlon ! part of ngrid |
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19 | integer kflev ! part of nalyer |
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20 | |
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21 | real dt0 (ndlo2) ! surface temperature discontinuity |
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22 | real tlay (ndlo2,kflev) ! layer temperature |
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23 | real tlev (ndlo2,kflev+1) ! level temperature |
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24 | |
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25 | c outputs: |
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26 | c -------- |
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27 | real bsurf (ndlo2,nir) ! surface spectral planck function |
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28 | real btop (ndlo2,nir) ! top spectral planck function |
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29 | real blev (ndlo2,nir,kflev+1) ! level spectral planck function |
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30 | real blay (ndlo2,nir,kflev) ! layer spectral planck function |
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31 | real dblay (ndlo2,nir,kflev) ! layer gradient spectral planck function |
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32 | real dbsublay (ndlo2,nir,2*kflev) ! layer gradient spectral planck |
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33 | ! function in sub layers |
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34 | |
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35 | c---------------------------------------------------------------------- |
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36 | c 0.2 local arrays |
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37 | c ------------ |
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38 | |
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39 | integer jk, jl, jnu, jk1, jk2 |
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40 | |
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41 | real ztlay (ndlon) |
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42 | real ztlev (ndlon) |
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43 | |
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44 | c---------------------------------------------------------------------- |
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45 | do jnu=1,nir |
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46 | c---------------------------------------------------------------------- |
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47 | c 1.1 levels and layers from surface to nlaylte |
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48 | c --------------------------------------- |
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49 | |
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50 | do jk = 1 , nlaylte |
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51 | do jl = 1 , kdlon |
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52 | |
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53 | c level planck function |
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54 | c --------------------- |
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55 | ztlev(jl)=(tlev(jl,jk)-tstand)/tstand ! tstand = 200k |
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56 | |
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57 | blev(jl,jnu,jk) = xp(1,jnu) |
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58 | . +ztlev(jl)*(xp(2,jnu) |
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59 | . +ztlev(jl)*(xp(3,jnu) |
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60 | . +ztlev(jl)*(xp(4,jnu) |
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61 | . +ztlev(jl)*(xp(5,jnu) |
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62 | . +ztlev(jl)*(xp(6,jnu) ))))) |
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63 | |
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64 | c layer planck function |
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65 | c --------------------- |
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66 | ztlay(jl)=(tlay(jl,jk)-tstand)/tstand |
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67 | |
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68 | blay(jl,jnu,jk) = xp(1,jnu) |
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69 | . +ztlay(jl)*(xp(2,jnu) |
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70 | . +ztlay(jl)*(xp(3,jnu) |
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71 | . +ztlay(jl)*(xp(4,jnu) |
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72 | . +ztlay(jl)*(xp(5,jnu) |
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73 | . +ztlay(jl)*(xp(6,jnu) ))))) |
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74 | |
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75 | c planck function gradient |
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76 | c ------------------------ |
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77 | dblay(jl,jnu,jk) = xp(2,jnu) |
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78 | . +ztlay(jl)*(2*xp(3,jnu) |
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79 | . +ztlay(jl)*(3*xp(4,jnu) |
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80 | . +ztlay(jl)*(4*xp(5,jnu) |
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81 | . +ztlay(jl)*(5*xp(6,jnu) )))) |
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82 | dblay(jl,jnu,jk) = dblay(jl,jnu,jk)/tstand |
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83 | |
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84 | enddo |
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85 | enddo |
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86 | |
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87 | c---------------------------------------------------------------------- |
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88 | c 1.2 top of the atmosphere and surface |
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89 | c -------------------------------- |
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90 | |
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91 | do jl = 1 , kdlon |
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92 | c top of the atmosphere |
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93 | c --------------------- |
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94 | ztlev(jl) = (tlev(jl,nlaylte+1)-tstand)/tstand |
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95 | |
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96 | blev(jl,jnu,nlaylte+1) = xp(1,jnu) |
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97 | . +ztlev(jl)*(xp(2,jnu) |
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98 | . +ztlev(jl)*(xp(3,jnu) |
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99 | . +ztlev(jl)*(xp(4,jnu) |
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100 | . +ztlev(jl)*(xp(5,jnu) |
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101 | . +ztlev(jl)*(xp(6,jnu) ))))) |
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102 | btop(jl,jnu) = blev(jl,jnu,nlaylte+1) |
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103 | |
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104 | c surface |
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105 | c ------- |
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106 | ztlay(jl) = (tlev(jl,1)+dt0(jl)-tstand)/tstand |
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107 | |
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108 | bsurf(jl,jnu) = xp(1,jnu) |
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109 | . +ztlay(jl)*(xp(2,jnu) |
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110 | . +ztlay(jl)*(xp(3,jnu) |
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111 | . +ztlay(jl)*(xp(4,jnu) |
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112 | . +ztlay(jl)*(xp(5,jnu) |
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113 | . +ztlay(jl)*(xp(6,jnu) ))))) |
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114 | |
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115 | enddo |
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116 | |
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117 | c---------------------------------------------------------------------- |
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118 | c 1.3 Gradients in sub-layers |
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119 | c ----------------------- |
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120 | |
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121 | do jk=1,nlaylte |
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122 | jk2 = 2 * jk |
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123 | jk1 = jk2 - 1 |
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124 | do jl=1,kdlon |
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125 | dbsublay(jl,jnu,jk1)=blay(jl,jnu,jk)-blev(jl,jnu,jk) |
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126 | dbsublay(jl,jnu,jk2)=blev(jl,jnu,jk+1)-blay(jl,jnu,jk) |
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127 | enddo |
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128 | enddo |
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129 | |
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130 | c---------------------------------------------------------------------- |
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131 | enddo ! (do jnu=1,nir) |
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132 | c---------------------------------------------------------------------- |
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133 | |
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134 | return |
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135 | end |
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