| 1 | SUBROUTINE GPPRE(KPROMA,KSTART,KPROF,KFLEV,PVAH,PVBH,PRESH,PRESF) |
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| 2 | |
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| 3 | !**** *GPPRE* - Computes half and full level pressure |
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| 4 | |
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| 5 | ! Purpose. |
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| 6 | ! -------- |
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| 7 | ! Computes pressures at half and full model levels. |
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| 8 | |
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| 9 | !** Interface. |
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| 10 | ! ---------- |
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| 11 | ! *CALL* *GPPRE(KPROMA,KSTART,KPROF,KFLEV,PVAH,PVBH,PRESH,PRESF) |
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| 12 | |
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| 13 | ! Explicit arguments : |
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| 14 | ! -------------------- |
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| 15 | ! KPROMA : dimensioning |
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| 16 | ! KSTART : start of work |
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| 17 | ! KPROF : depth of work |
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| 18 | ! KFLEV : vert. dimensioning |
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| 19 | ! PRESH(KPROMA,0:KFLEV) - HALF LEVEL PRESSURE |
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| 20 | ! PRESF(KPROMA,KFLEV) - FULL LEVEL PRESSURE |
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| 21 | ! PVAH(KFLEV),PVBH(KFLEV)- vertical coordinate |
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| 22 | ! Implicit arguments : NONE. |
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| 23 | ! -------------------- |
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| 24 | |
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| 25 | ! Method. |
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| 26 | ! ------- |
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| 27 | ! See documentation |
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| 28 | |
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| 29 | ! Externals. None. |
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| 30 | ! ---------- |
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| 31 | |
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| 32 | ! Reference. |
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| 33 | ! ---------- |
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| 34 | ! ECMWF Research Department documentation of the IFS |
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| 35 | ! Half level P: PHk = Ak + Bk * Ps |
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| 36 | |
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| 37 | ! PHk*ln(PHk) - PHk-1*ln(PHk-1) |
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| 38 | ! Full level P: ln(PFk) = [ ------------------------------- - 1. ] |
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| 39 | ! PHk - PHk-1 |
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| 40 | |
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| 41 | ! Author. |
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| 42 | ! ------- |
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| 43 | ! Mats Hamrud and Philippe Courtier *ECMWF* |
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| 44 | |
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| 45 | ! Modifications. |
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| 46 | ! -------------- |
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| 47 | ! Original : 88-02-04 |
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| 48 | ! Erik Andersson 920326: Altered computation of full level pressure |
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| 49 | ! Erik Andersson 930225: Use GPPREH/F. |
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| 50 | ! M.Hamrud 01-Oct-2003 CY28 Cleaning |
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| 51 | ! ------------------------------------------------------------------ |
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| 52 | |
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| 53 | USE PARKIND1 ,ONLY : JPIM ,JPRB |
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| 54 | USE YOMHOOK ,ONLY : LHOOK, DR_HOOK |
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| 55 | |
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| 56 | USE YOMGEM , ONLY : VC ,VDELB |
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| 57 | |
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| 58 | IMPLICIT NONE |
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| 59 | |
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| 60 | INTEGER(KIND=JPIM),INTENT(IN) :: KPROMA |
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| 61 | INTEGER(KIND=JPIM),INTENT(IN) :: KFLEV |
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| 62 | INTEGER(KIND=JPIM),INTENT(IN) :: KSTART |
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| 63 | INTEGER(KIND=JPIM),INTENT(IN) :: KPROF |
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| 64 | REAL(KIND=JPRB) ,INTENT(IN) :: PVAH(0:KFLEV) |
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| 65 | REAL(KIND=JPRB) ,INTENT(IN) :: PVBH(0:KFLEV) |
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| 66 | REAL(KIND=JPRB) ,INTENT(INOUT) :: PRESH(KPROMA,0:KFLEV) |
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| 67 | REAL(KIND=JPRB) ,INTENT(OUT) :: PRESF(KPROMA,KFLEV) |
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| 68 | REAL(KIND=JPRB) :: ZLNPR(KPROMA,KFLEV) , ZALPH (KPROMA,KFLEV) |
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| 69 | REAL(KIND=JPRB) :: ZDELP(KPROMA,KFLEV) , ZRDELP(KPROMA,KFLEV) |
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| 70 | REAL(KIND=JPRB) :: ZRTGR(KPROMA,KFLEV) , ZRPRES(KPROMA,KFLEV) |
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| 71 | REAL(KIND=JPRB) :: ZRPP (KPROMA,KFLEV) |
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| 72 | REAL(KIND=JPRB) :: ZHOOK_HANDLE |
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| 73 | |
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| 74 | #include "gppref.intfb.h" |
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| 75 | #include "gppreh.intfb.h" |
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| 76 | #include "gpxyb.intfb.h" |
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| 77 | |
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| 78 | ! ------------------------------------------------------------------ |
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| 79 | |
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| 80 | !* 1. COMPUTES HALF AND FULL LEVEL PRESSURES |
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| 81 | ! -------------------------------------- |
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| 82 | |
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| 83 | IF (LHOOK) CALL DR_HOOK('GPPRE',0,ZHOOK_HANDLE) |
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| 84 | CALL GPPREH(KPROMA,KSTART,KPROF,KFLEV,PVAH,PVBH,PRESH) |
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| 85 | CALL GPXYB(KPROMA,KSTART,KPROF,KFLEV,VDELB,VC,PRESH,ZDELP,& |
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| 86 | & ZRDELP,ZLNPR,ZALPH,ZRTGR,ZRPRES,ZRPP) |
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| 87 | CALL GPPREF(KPROMA,KSTART,KPROF,KFLEV,PVAH,PVBH,ZALPH,PRESH,PRESF) |
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| 88 | |
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| 89 | ! ------------------------------------------------------------------ |
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| 90 | |
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| 91 | IF (LHOOK) CALL DR_HOOK('GPPRE',1,ZHOOK_HANDLE) |
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| 92 | END SUBROUTINE GPPRE |
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