[3990] | 1 | SUBROUTINE OLWB & |
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| 2 | & ( KIDIA, KFDIA, KLON , KLEV & |
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| 3 | & , PDT0 , PT , PTH & |
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| 4 | & , PB , PBINT, PBSUIN, PBSUR , PBTOP , PDBSL & |
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| 5 | & , PGA , PGB , PGASUR, PGBSUR, PGATOP, PGBTOP ) |
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| 6 | ! |
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| 7 | !**** *LWB* - COMPUTES BLACK-BODY FUNCTIONS FOR LONGWAVE CALCULATIONS |
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| 8 | ! |
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| 9 | ! PURPOSE. |
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| 10 | ! -------- |
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| 11 | ! COMPUTES PLANCK FUNCTIONS |
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| 12 | ! |
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| 13 | !** INTERFACE. |
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| 14 | ! ---------- |
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| 15 | ! |
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| 16 | ! EXPLICIT ARGUMENTS : |
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| 17 | ! -------------------- |
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| 18 | ! ==== INPUTS === |
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| 19 | ! PDT0 : (KLON) ; SURFACE TEMPERATURE DISCONTINUITY |
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| 20 | ! PT : (KLON,KLEV) ; TEMPERATURE |
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| 21 | ! PTH : (KLON,KLEV+1) ; HALF LEVEL TEMPERATURE |
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| 22 | ! ==== OUTPUTS === |
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| 23 | ! PB : (KLON,NISP,KLEV+1) ; SPECTRAL HALF LEVEL PLANCK FUNCTION |
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| 24 | ! PBINT : (KLON,KLEV+1) ; HALF LEVEL PLANCK FUNCTION |
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| 25 | ! PBSUIN : (KLON) ; SURFACE PLANCK FUNCTION |
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| 26 | ! PBSUR : (KLON,NISP) ; SURFACE SPECTRAL PLANCK FUNCTION |
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| 27 | ! PBTOP : (KLON,NISP) ; TOP SPECTRAL PLANCK FUNCTION |
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| 28 | ! PDBSL : (KLON,NISP,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 | ! |
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| 62 | !----------------------------------------------------------------------- |
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| 63 | |
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| 64 | #include "tsmbkind.h" |
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| 65 | |
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| 66 | USE YOEOLW , ONLY : MXIXT ,NISP ,NIPD , GA ,& |
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| 67 | & GB ,TINTP ,TSTAND ,TSTP ,XP |
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| 68 | |
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| 69 | IMPLICIT NONE |
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| 70 | |
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| 71 | |
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| 72 | ! DUMMY INTEGER SCALARS |
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| 73 | INTEGER_M :: KFDIA |
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| 74 | INTEGER_M :: KIDIA |
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| 75 | INTEGER_M :: KLEV |
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| 76 | INTEGER_M :: KLON |
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| 77 | |
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| 78 | !----------------------------------------------------------------------- |
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| 79 | ! |
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| 80 | !* 0.1 ARGUMENTS |
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| 81 | ! --------- |
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| 82 | ! |
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| 83 | REAL_B :: PDT0(KLON), PT(KLON,KLEV), PTH(KLON,KLEV+1) |
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| 84 | ! |
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| 85 | REAL_B :: PB(KLON,NISP,KLEV+1), PBINT(KLON,KLEV+1) & |
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| 86 | & , PBSUIN(KLON) , PBSUR(KLON,NISP) & |
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| 87 | & , PBTOP(KLON,NISP) , PDBSL(KLON,NISP,KLEV*2) & |
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| 88 | & , PGA(KLON,8,2,KLEV) , PGB(KLON,8,2,KLEV) & |
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| 89 | & , PGASUR(KLON,8,2) , PGBSUR(KLON,8,2) & |
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| 90 | & , PGATOP(KLON,8,2) , PGBTOP(KLON,8,2) |
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| 91 | ! |
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| 92 | !------------------------------------------------------------------------- |
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| 93 | ! |
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| 94 | !* 0.2 LOCAL ARRAYS |
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| 95 | ! ------------ |
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| 96 | INTEGER_M :: INDB(KLON),INDS(KLON) |
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| 97 | |
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| 98 | REAL_B :: ZBLAY(KLON,KLEV),ZBLEV(KLON,KLEV+1) & |
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| 99 | & , ZRES(KLON),ZRES2(KLON),ZTI(KLON),ZTI2(KLON) |
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| 100 | |
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| 101 | REAL_B :: ZDST1, ZDSTO1, ZDSTX, ZDSTOX |
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| 102 | |
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| 103 | INTEGER_M :: ILEV2, INDSU, INDT, INDTP, INDTO, INUS, INUE, IXTOX, IXTX & |
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| 104 | & , JF, JG, JNU, JK, JK1, JK2, JL, IKL |
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| 105 | ! |
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| 106 | ! ------------------------------------------------------------------ |
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| 107 | ! |
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| 108 | ! |
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| 109 | !* 1.0 PLANCK FUNCTIONS AND GRADIENTS |
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| 110 | ! ------------------------------ |
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| 111 | ! |
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| 112 | ILEV2=2*KLEV |
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| 113 | INUS=1 |
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| 114 | INUE=NISP |
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| 115 | |
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| 116 | DO JK = 1 , KLEV+1 |
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| 117 | DO JL = KIDIA,KFDIA |
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| 118 | PBINT(JL,JK) = 0. |
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| 119 | END DO |
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| 120 | END DO |
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| 121 | DO JNU=1,NISP |
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| 122 | DO JL=KIDIA,KFDIA |
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| 123 | PBSUR(JL,JNU)=0. |
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| 124 | PBTOP(JL,JNU)=0. |
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| 125 | END DO |
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| 126 | DO JK=1,KLEV |
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| 127 | DO JL=KIDIA,KFDIA |
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| 128 | PB(JL,JNU,JK)=0. |
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| 129 | END DO |
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| 130 | END DO |
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| 131 | DO JK=1,ILEV2 |
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| 132 | DO JL=KIDIA,KFDIA |
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| 133 | PDBSL(JL,JNU,JK)=0. |
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| 134 | END DO |
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| 135 | END DO |
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| 136 | END DO |
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| 137 | DO JL = KIDIA,KFDIA |
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| 138 | PBSUIN(JL) = 0. |
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| 139 | END DO |
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| 140 | ! |
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| 141 | DO JNU=INUS,INUE |
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| 142 | ! |
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| 143 | ! |
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| 144 | !* 1.1 LEVELS FROM SURFACE TO KLEV |
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| 145 | ! ---------------------------- |
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| 146 | ! TEMPERATURE ENTERED FROM TOP TO BOTTOM |
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| 147 | ! |
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| 148 | DO JK = 1 , KLEV |
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| 149 | IKL=KLEV+1-JK |
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| 150 | DO JL = KIDIA,KFDIA |
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| 151 | ZTI(JL)=(PTH(JL,IKL+1)-TSTAND)/TSTAND |
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| 152 | ZRES(JL) = XP(1,JNU)+ZTI(JL)*(XP(2,JNU)+ZTI(JL)*(XP(3,JNU) & |
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| 153 | & +ZTI(JL)*(XP(4,JNU)+ZTI(JL)*(XP(5,JNU)+ZTI(JL)*(XP(6,JNU) & |
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| 154 | & ))))) |
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| 155 | PBINT(JL,JK)=PBINT(JL,JK)+ZRES(JL) |
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| 156 | PB(JL,JNU,JK)= ZRES(JL) |
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| 157 | ZBLEV(JL,JK) = ZRES(JL) |
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| 158 | |
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| 159 | ZTI2(JL)=(PT(JL,IKL)-TSTAND)/TSTAND |
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| 160 | ZRES2(JL)=XP(1,JNU)+ZTI2(JL)*(XP(2,JNU)+ZTI2(JL)*(XP(3,JNU) & |
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| 161 | & +ZTI2(JL)*(XP(4,JNU)+ZTI2(JL)*(XP(5,JNU)+ZTI2(JL)*(XP(6,JNU) & |
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| 162 | & ))))) |
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| 163 | ZBLAY(JL,JK) = ZRES2(JL) |
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| 164 | END DO |
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| 165 | END DO |
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| 166 | ! |
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| 167 | ! |
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| 168 | !* 1.2 TOP OF THE ATMOSPHERE AND SURFACE |
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| 169 | ! --------------------------------- |
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| 170 | ! TEMPERATURE ENTERED FROM TOP TO BOTTOM |
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| 171 | ! |
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| 172 | DO JL = KIDIA,KFDIA |
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| 173 | ZTI(JL)=(PTH(JL,1)-TSTAND)/TSTAND |
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| 174 | ZTI2(JL) = (PTH(JL,KLEV+1) + PDT0(JL) - TSTAND) / TSTAND |
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| 175 | ZRES(JL) = XP(1,JNU)+ZTI(JL)*(XP(2,JNU)+ZTI(JL)*(XP(3,JNU) & |
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| 176 | & +ZTI(JL)*(XP(4,JNU)+ZTI(JL)*(XP(5,JNU)+ZTI(JL)*(XP(6,JNU) & |
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| 177 | & ))))) |
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| 178 | ZRES2(JL) = XP(1,JNU)+ZTI2(JL)*(XP(2,JNU)+ZTI2(JL)*(XP(3,JNU) & |
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| 179 | & +ZTI2(JL)*(XP(4,JNU)+ZTI2(JL)*(XP(5,JNU)+ZTI2(JL)*(XP(6,JNU) & |
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| 180 | & ))))) |
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| 181 | PBINT(JL,KLEV+1) = PBINT(JL,KLEV+1)+ZRES(JL) |
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| 182 | PB(JL,JNU,KLEV+1)= ZRES(JL) |
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| 183 | ZBLEV(JL,KLEV+1) = ZRES(JL) |
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| 184 | PBTOP(JL,JNU) = ZRES(JL) |
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| 185 | PBSUR(JL,JNU) = ZRES2(JL) |
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| 186 | PBSUIN(JL) = PBSUIN(JL) + ZRES2(JL) |
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| 187 | END DO |
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| 188 | ! |
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| 189 | ! |
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| 190 | !* 1.3 GRADIENTS IN SUB-LAYERS |
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| 191 | ! ----------------------- |
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| 192 | ! |
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| 193 | DO JK = 1 , KLEV |
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| 194 | JK2 = 2 * JK |
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| 195 | JK1 = JK2 - 1 |
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| 196 | DO JL = KIDIA,KFDIA |
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| 197 | PDBSL(JL,JNU,JK1) = ZBLAY(JL,JK ) - ZBLEV(JL,JK) |
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| 198 | PDBSL(JL,JNU,JK2) = ZBLEV(JL,JK+1) - ZBLAY(JL,JK) |
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| 199 | END DO |
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| 200 | END DO |
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| 201 | ! |
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| 202 | END DO |
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| 203 | ! |
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| 204 | !* 2.0 CHOOSE THE RELEVANT SETS OF PADE APPROXIMANTS |
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| 205 | ! --------------------------------------------- |
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| 206 | ! |
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| 207 | DO JL=KIDIA,KFDIA |
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| 208 | ZDSTO1 = (PTH(JL,1)-TINTP(1)) / TSTP |
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| 209 | IXTOX = MAX( 1, MIN( INT(MXIXT), INT( ZDSTO1 + 1. ) ) ) |
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| 210 | ZDSTOX = (PTH(JL,1)-TINTP(IXTOX))/TSTP |
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| 211 | IF (ZDSTOX.LT.0.5) THEN |
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| 212 | INDTO=IXTOX |
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| 213 | ELSE |
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| 214 | INDTO=IXTOX+1 |
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| 215 | END IF |
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| 216 | INDB(JL)=INDTO |
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| 217 | |
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| 218 | ZDST1 = (PTH(JL,KLEV+1)-TINTP(1)) / TSTP |
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| 219 | IXTX = MAX( 1, MIN( INT(MXIXT), INT( ZDST1 + 1. ) ) ) |
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| 220 | ZDSTX = (PTH(JL,KLEV+1)-TINTP(IXTX))/TSTP |
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| 221 | IF (ZDSTX.LT.0.5) THEN |
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| 222 | INDT=IXTX |
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| 223 | ELSE |
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| 224 | INDT=IXTX+1 |
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| 225 | END IF |
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| 226 | INDS(JL)=INDT |
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| 227 | END DO |
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| 228 | ! |
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| 229 | DO JF=1,2 |
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| 230 | DO JG=1, 8 |
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| 231 | DO JL=KIDIA,KFDIA |
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| 232 | INDSU=INDS(JL) |
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| 233 | PGASUR(JL,JG,JF)=GA(INDSU,2*JG-1,JF) |
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| 234 | PGBSUR(JL,JG,JF)=GB(INDSU,2*JG-1,JF) |
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| 235 | INDTP=INDB(JL) |
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| 236 | PGATOP(JL,JG,JF)=GA(INDTP,2*JG-1,JF) |
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| 237 | PGBTOP(JL,JG,JF)=GB(INDTP,2*JG-1,JF) |
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| 238 | END DO |
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| 239 | END DO |
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| 240 | END DO |
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| 241 | ! |
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| 242 | DO JK=1,KLEV |
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| 243 | IKL=KLEV+1-JK |
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| 244 | DO JL=KIDIA,KFDIA |
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| 245 | ZDST1 = (PT(JL,IKL)-TINTP(1)) / TSTP |
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| 246 | IXTX = MAX( 1, MIN( INT(MXIXT), INT( ZDST1 + 1. ) ) ) |
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| 247 | ZDSTX = (PT(JL,IKL)-TINTP(IXTX))/TSTP |
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| 248 | IF (ZDSTX.LT.0.5) THEN |
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| 249 | INDT=IXTX |
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| 250 | ELSE |
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| 251 | INDT=IXTX+1 |
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| 252 | END IF |
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| 253 | INDB(JL)=INDT |
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| 254 | END DO |
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| 255 | ! |
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| 256 | DO JF=1,2 |
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| 257 | DO JG=1, 8 |
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| 258 | DO JL=KIDIA,KFDIA |
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| 259 | INDT=INDB(JL) |
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| 260 | PGA(JL,JG,JF,JK)=GA(INDT,2*JG,JF) |
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| 261 | PGB(JL,JG,JF,JK)=GB(INDT,2*JG,JF) |
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| 262 | END DO |
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| 263 | END DO |
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| 264 | END DO |
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| 265 | END DO |
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| 266 | ! |
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| 267 | ! ------------------------------------------------------------------ |
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| 268 | ! |
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| 269 | RETURN |
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| 270 | END SUBROUTINE OLWB |
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