[3331] | 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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