1 | SUBROUTINE LWB & |
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2 | & ( KIDIA, KFDIA, KLON , KLEV , KMODE,& |
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3 | & PDT0 , PTAVE, PTL,& |
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4 | & PB , PBINT, PBSUR , PBTOP , PDBSL,& |
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5 | & PGA , PGB , PGASUR, PGBSUR, PGATOP, PGBTOP & |
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6 | & ) |
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7 | |
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8 | !**** *LWB* - COMPUTES BLACK-BODY FUNCTIONS FOR LONGWAVE CALCULATIONS |
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9 | |
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10 | ! PURPOSE. |
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11 | ! -------- |
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12 | ! COMPUTES PLANCK FUNCTIONS |
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13 | |
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14 | !** INTERFACE. |
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15 | ! ---------- |
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16 | |
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17 | ! EXPLICIT ARGUMENTS : |
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18 | ! -------------------- |
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19 | ! ==== INPUTS === |
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20 | ! PDT0 : (KLON) ; SURFACE TEMPERATURE DISCONTINUITY |
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21 | ! PTAVE : (KLON,KLEV) ; TEMPERATURE |
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22 | ! PTL : (KLON,KLEV+1) ; HALF LEVEL TEMPERATURE |
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23 | ! ==== OUTPUTS === |
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24 | ! PB : (KLON,NSIL,KLEV+1); SPECTRAL HALF LEVEL PLANCK FUNCTION |
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25 | ! PBINT : (KLON,KLEV+1) ; HALF LEVEL PLANCK FUNCTION |
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26 | ! PBSUR : (KLON,NSIL) ; SURFACE SPECTRAL PLANCK FUNCTION |
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27 | ! PBTOP : (KLON,NSIL) ; TOP SPECTRAL PLANCK FUNCTION |
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28 | ! PDBSL : (KLON,NSIL,KLEV*2); SUB-LAYER PLANCK FUNCTION GRADIENT |
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29 | ! PGA : (KLON,8,2,KLEV) ; dB/dT-weighted LAYER PADE APPROXIMANTS |
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30 | ! PGB : (KLON,8,2,KLEV) ; dB/dT-weighted LAYER PADE APPROXIMANTS |
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31 | ! PGASUR, PGBSUR (KLON,8,2) ; SURFACE PADE APPROXIMANTS |
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32 | ! PGATOP, PGBTOP (KLON,8,2) ; T.O.A. PADE APPROXIMANTS |
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33 | |
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34 | ! IMPLICIT ARGUMENTS : NONE |
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35 | ! -------------------- |
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36 | |
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37 | ! METHOD. |
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38 | ! ------- |
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39 | |
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40 | ! 1. COMPUTES THE PLANCK FUNCTION ON ALL LEVELS AND HALF LEVELS |
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41 | ! FROM A POLYNOMIAL DEVELOPMENT OF PLANCK FUNCTION |
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42 | |
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43 | ! EXTERNALS. |
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44 | ! ---------- |
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45 | |
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46 | ! NONE |
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47 | |
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48 | ! REFERENCE. |
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49 | ! ---------- |
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50 | |
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51 | ! SEE RADIATION'S PART OF THE MODEL'S DOCUMENTATION AND |
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52 | ! ECMWF RESEARCH DEPARTMENT DOCUMENTATION OF THE IFS " |
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53 | |
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54 | ! AUTHOR. |
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55 | ! ------- |
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56 | ! JEAN-JACQUES MORCRETTE *ECMWF* |
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57 | |
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58 | ! MODIFICATIONS. |
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59 | ! -------------- |
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60 | ! ORIGINAL : 89-07-14 |
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61 | ! MODIFIED : 99-06-14 D.SALMOND Optimisation |
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62 | ! M.Hamrud 01-Oct-2003 CY28 Cleaning |
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63 | |
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64 | !----------------------------------------------------------------------- |
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65 | |
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66 | USE PARKIND1 ,ONLY : JPIM ,JPRB |
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67 | USE YOMHOOK ,ONLY : LHOOK, DR_HOOK |
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68 | |
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69 | USE YOELW , ONLY : MXIXT ,NSIL ,NIPD ,PDGA ,& |
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70 | & PDGB ,TINTP ,TSTAND ,TSTP ,XP |
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71 | |
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72 | IMPLICIT NONE |
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73 | |
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74 | INTEGER(KIND=JPIM),INTENT(IN) :: KLON |
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75 | INTEGER(KIND=JPIM),INTENT(IN) :: KLEV |
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76 | INTEGER(KIND=JPIM),INTENT(IN) :: KIDIA |
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77 | INTEGER(KIND=JPIM),INTENT(IN) :: KFDIA |
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78 | INTEGER(KIND=JPIM),INTENT(IN) :: KMODE |
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79 | REAL(KIND=JPRB) ,INTENT(IN) :: PDT0(KLON) |
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80 | REAL(KIND=JPRB) ,INTENT(IN) :: PTAVE(KLON,KLEV) |
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81 | REAL(KIND=JPRB) ,INTENT(IN) :: PTL(KLON,KLEV+1) |
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82 | REAL(KIND=JPRB) ,INTENT(OUT) :: PB(KLON,NSIL,KLEV+1) |
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83 | REAL(KIND=JPRB) ,INTENT(OUT) :: PBINT(KLON,KLEV+1) |
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84 | REAL(KIND=JPRB) ,INTENT(OUT) :: PBSUR(KLON,NSIL) |
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85 | REAL(KIND=JPRB) ,INTENT(OUT) :: PBTOP(KLON,NSIL) |
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86 | REAL(KIND=JPRB) ,INTENT(OUT) :: PDBSL(KLON,NSIL,KLEV*2) |
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87 | REAL(KIND=JPRB) ,INTENT(OUT) :: PGA(KLON,NIPD,2,KLEV) |
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88 | REAL(KIND=JPRB) ,INTENT(OUT) :: PGB(KLON,NIPD,2,KLEV) |
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89 | REAL(KIND=JPRB) ,INTENT(OUT) :: PGASUR(KLON,NIPD,2) |
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90 | REAL(KIND=JPRB) ,INTENT(OUT) :: PGBSUR(KLON,NIPD,2) |
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91 | REAL(KIND=JPRB) ,INTENT(OUT) :: PGATOP(KLON,NIPD,2) |
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92 | REAL(KIND=JPRB) ,INTENT(OUT) :: PGBTOP(KLON,NIPD,2) |
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93 | !----------------------------------------------------------------------- |
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94 | |
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95 | !* 0.1 ARGUMENTS |
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96 | ! --------- |
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97 | |
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98 | !------------------------------------------------------------------------- |
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99 | |
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100 | ! ------------ |
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101 | INTEGER(KIND=JPIM) :: INDB(KLON) , INDS(KLON) |
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102 | REAL(KIND=JPRB) :: ZBLAY(KLON,KLEV), ZBLEV(KLON,KLEV+1)& |
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103 | & , ZRES(KLON) , ZRES2(KLON)& |
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104 | & , ZTI(KLON) , ZTI2(KLON) |
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105 | |
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106 | INTEGER(KIND=JPIM) :: ILEV2, INDSU, INDT, INDTO, INDTP, INUE, INUS,& |
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107 | & IXTOX, IXTX, JF, JG, JK, JK1, JK2, JL, JNU |
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108 | |
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109 | REAL(KIND=JPRB) :: ZDST1, ZDSTO1, ZDSTOX, ZDSTX |
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110 | REAL(KIND=JPRB) :: ZHOOK_HANDLE |
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111 | |
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112 | ! ------------------------------------------------------------------ |
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113 | |
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114 | !* 1.0 PLANCK FUNCTIONS AND GRADIENTS |
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115 | ! ------------------------------ |
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116 | |
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117 | PRINT *,'dans LWB' |
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118 | IF (LHOOK) CALL DR_HOOK('LWB',0,ZHOOK_HANDLE) |
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119 | ILEV2=2*KLEV |
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120 | INUS=1 |
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121 | INUE=NSIL |
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122 | IF (KMODE == 2) THEN |
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123 | INUS=3 |
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124 | INUE=4 |
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125 | ENDIF |
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126 | |
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127 | DO JK = 1 , KLEV+1 |
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128 | DO JL = KIDIA,KFDIA |
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129 | PBINT(JL,JK) = 0.0_JPRB |
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130 | ENDDO |
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131 | ENDDO |
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132 | |
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133 | DO JNU=1,NSIL |
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134 | DO JL=KIDIA,KFDIA |
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135 | PBSUR(JL,JNU)=0.0_JPRB |
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136 | PBTOP(JL,JNU)=0.0_JPRB |
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137 | ENDDO |
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138 | DO JK=1,KLEV |
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139 | DO JL=KIDIA,KFDIA |
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140 | PB(JL,JNU,JK)=0.0_JPRB |
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141 | ENDDO |
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142 | ENDDO |
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143 | DO JK=1,ILEV2 |
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144 | DO JL=KIDIA,KFDIA |
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145 | PDBSL(JL,JNU,JK)=0.0_JPRB |
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146 | ENDDO |
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147 | ENDDO |
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148 | ENDDO |
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149 | |
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150 | DO JNU=INUS,INUE |
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151 | |
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152 | !* 1.1 LEVELS FROM SURFACE TO KLEV |
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153 | ! ---------------------------- |
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154 | |
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155 | DO JK = 1 , KLEV |
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156 | DO JL = KIDIA,KFDIA |
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157 | ZTI(JL)=(PTL(JL,JK)-TSTAND)/TSTAND |
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158 | ZRES(JL) = XP(1,JNU)+ZTI(JL)*(XP(2,JNU)+ZTI(JL)*(XP(3,JNU)& |
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159 | & +ZTI(JL)*(XP(4,JNU)+ZTI(JL)*(XP(5,JNU)+ZTI(JL)*(XP(6,JNU)& |
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160 | & ))))) |
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161 | PBINT(JL,JK)=PBINT(JL,JK)+ZRES(JL) |
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162 | PB(JL,JNU,JK)= ZRES(JL) |
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163 | ZBLEV(JL,JK) = ZRES(JL) |
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164 | |
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165 | ZTI2(JL)=(PTAVE(JL,JK)-TSTAND)/TSTAND |
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166 | ZRES2(JL)=XP(1,JNU)+ZTI2(JL)*(XP(2,JNU)+ZTI2(JL)*(XP(3,JNU)& |
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167 | & +ZTI2(JL)*(XP(4,JNU)+ZTI2(JL)*(XP(5,JNU)+ZTI2(JL)*(XP(6,& |
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168 | & JNU)& |
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169 | & ))))) |
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170 | ZBLAY(JL,JK) = ZRES2(JL) |
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171 | ENDDO |
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172 | ENDDO |
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173 | |
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174 | !* 1.2 TOP OF THE ATMOSPHERE AND SURFACE |
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175 | ! --------------------------------- |
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176 | |
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177 | DO JL = KIDIA,KFDIA |
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178 | ZTI(JL)=(PTL(JL,KLEV+1)-TSTAND)/TSTAND |
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179 | ZTI2(JL) = (PTL(JL,1) + PDT0(JL) - TSTAND) / TSTAND |
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180 | ZRES(JL) = XP(1,JNU)+ZTI(JL)*(XP(2,JNU)+ZTI(JL)*(XP(3,JNU)& |
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181 | & +ZTI(JL)*(XP(4,JNU)+ZTI(JL)*(XP(5,JNU)+ZTI(JL)*(XP(6,JNU)& |
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182 | & ))))) |
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183 | ZRES2(JL) = XP(1,JNU)+ZTI2(JL)*(XP(2,JNU)+ZTI2(JL)*(XP(3,JNU)& |
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184 | & +ZTI2(JL)*(XP(4,JNU)+ZTI2(JL)*(XP(5,JNU)+ZTI2(JL)*(XP(6,JNU)& |
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185 | & ))))) |
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186 | PBINT(JL,KLEV+1) = PBINT(JL,KLEV+1)+ZRES(JL) |
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187 | PB(JL,JNU,KLEV+1)= ZRES(JL) |
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188 | ZBLEV(JL,KLEV+1) = ZRES(JL) |
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189 | PBTOP(JL,JNU) = ZRES(JL) |
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190 | PBSUR(JL,JNU) = ZRES2(JL) |
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191 | ENDDO |
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192 | |
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193 | !* 1.3 GRADIENTS IN SUB-LAYERS |
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194 | ! ----------------------- |
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195 | |
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196 | DO JK = 1 , KLEV |
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197 | JK2 = 2 * JK |
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198 | JK1 = JK2 - 1 |
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199 | DO JL = KIDIA,KFDIA |
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200 | PDBSL(JL,JNU,JK1) = ZBLAY(JL,JK ) - ZBLEV(JL,JK) |
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201 | PDBSL(JL,JNU,JK2) = ZBLEV(JL,JK+1) - ZBLAY(JL,JK) |
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202 | ENDDO |
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203 | ENDDO |
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204 | |
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205 | ENDDO |
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206 | |
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207 | !* 2.0 CHOOSE THE RELEVANT SETS OF PADE APPROXIMANTS |
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208 | ! --------------------------------------------- |
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209 | |
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210 | DO JL=KIDIA,KFDIA |
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211 | ZDSTO1 = (PTL(JL,KLEV+1)-TINTP(1)) / TSTP |
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212 | IXTOX = MAX( 1, MIN( MXIXT, INT( ZDSTO1 + 1.0_JPRB ) ) ) |
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213 | ZDSTOX = (PTL(JL,KLEV+1)-TINTP(IXTOX))/TSTP |
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214 | IF (ZDSTOX < 0.5_JPRB) THEN |
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215 | INDTO=IXTOX |
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216 | ELSE |
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217 | INDTO=IXTOX+1 |
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218 | ENDIF |
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219 | INDB(JL)=INDTO |
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220 | ZDST1 = (PTL(JL,1)-TINTP(1)) / TSTP |
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221 | IXTX = MAX( 1, MIN( MXIXT, INT( ZDST1 + 1.0_JPRB ) ) ) |
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222 | ZDSTX = (PTL(JL,1)-TINTP(IXTX))/TSTP |
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223 | IF (ZDSTX < 0.5_JPRB) THEN |
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224 | INDT=IXTX |
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225 | ELSE |
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226 | INDT=IXTX+1 |
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227 | ENDIF |
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228 | INDS(JL)=INDT |
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229 | ENDDO |
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230 | |
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231 | DO JF=1,2 |
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232 | DO JG=1,NIPD |
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233 | DO JL=KIDIA,KFDIA |
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234 | INDSU=INDS(JL) |
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235 | PGASUR(JL,JG,JF)=PDGA(INDSU,2*JG-1,JF) |
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236 | PGBSUR(JL,JG,JF)=PDGB(INDSU,2*JG-1,JF) |
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237 | INDTP=INDB(JL) |
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238 | PGATOP(JL,JG,JF)=PDGA(INDTP,2*JG-1,JF) |
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239 | PGBTOP(JL,JG,JF)=PDGB(INDTP,2*JG-1,JF) |
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240 | ENDDO |
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241 | ENDDO |
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242 | ENDDO |
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243 | |
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244 | DO JK=1,KLEV |
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245 | DO JL=KIDIA,KFDIA |
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246 | ZDST1 = (PTAVE(JL,JK)-TINTP(1)) / TSTP |
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247 | IXTX = MAX( 1, MIN( MXIXT, INT( ZDST1 + 1.0_JPRB ) ) ) |
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248 | ZDSTX = (PTAVE(JL,JK)-TINTP(IXTX))/TSTP |
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249 | IF (ZDSTX < 0.5_JPRB) THEN |
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250 | INDT=IXTX |
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251 | ELSE |
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252 | INDT=IXTX+1 |
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253 | ENDIF |
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254 | INDB(JL)=INDT |
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255 | ENDDO |
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256 | |
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257 | DO JF=1,2 |
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258 | DO JL=KIDIA,KFDIA |
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259 | INDT=INDB(JL) |
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260 | DO JG=1,NIPD |
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261 | PGA(JL,JG,JF,JK)=PDGA(INDT,2*JG,JF) |
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262 | PGB(JL,JG,JF,JK)=PDGB(INDT,2*JG,JF) |
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263 | ENDDO |
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264 | ENDDO |
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265 | ENDDO |
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266 | |
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267 | ENDDO |
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268 | |
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269 | ! ------------------------------------------------------------------ |
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270 | |
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271 | IF (LHOOK) CALL DR_HOOK('LWB',1,ZHOOK_HANDLE) |
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272 | END SUBROUTINE LWB |
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