[1989] | 1 | SUBROUTINE GPPREF(KPROMA,KSTART,KPROF,KFLEV,PVAH,PVBH,PALPH,PRESH,PRESF) |
---|
| 2 | |
---|
| 3 | !**** *GPPREF* - Computes full level pressure |
---|
| 4 | |
---|
| 5 | ! Purpose. |
---|
| 6 | ! -------- |
---|
| 7 | ! Computes pressures at half and full model levels. |
---|
| 8 | |
---|
| 9 | !** Interface. |
---|
| 10 | ! ---------- |
---|
| 11 | ! *CALL* *GPPREF(...) |
---|
| 12 | |
---|
| 13 | ! Explicit arguments : |
---|
| 14 | ! -------------------- |
---|
| 15 | ! KPROMA : dimensioning |
---|
| 16 | ! KSTART : start of work |
---|
| 17 | ! KPROF : depth of work |
---|
| 18 | ! KFLEV : vert. dimensioning |
---|
| 19 | ! PVAH(KFLEV),PVBH(KFLEV)- vertical coordinate |
---|
| 20 | ! PALPH (KPROMA,KFLEV) - COEFF OF THE HYDROST |
---|
| 21 | ! PRESH(KPROMA,0:KFLEV) - HALF LEVEL PRESSURE |
---|
| 22 | ! PRESF(KPROMA,KFLEV) - FULL LEVEL PRESSURE |
---|
[5159] | 23 | |
---|
[1989] | 24 | ! Implicit arguments : NONE. |
---|
| 25 | ! -------------------- |
---|
| 26 | |
---|
| 27 | ! Method. |
---|
| 28 | ! ------- |
---|
| 29 | ! See documentation |
---|
| 30 | |
---|
| 31 | ! Externals. None. |
---|
| 32 | ! ---------- |
---|
| 33 | |
---|
| 34 | ! Reference. |
---|
| 35 | ! ---------- |
---|
| 36 | ! ECMWF Research Department documentation of the IFS |
---|
| 37 | |
---|
| 38 | ! PHk*ln(PHk) - PHk-1*ln(PHk-1) |
---|
| 39 | ! Full level P: ln(PFk) = [ ------------------------------- - 1. ] |
---|
| 40 | ! PHk - PHk-1 |
---|
| 41 | |
---|
| 42 | ! which simplifies to: PFk = Pk+1/2 * exp(-ALPHA) |
---|
| 43 | |
---|
| 44 | ! In case of NDLNPR=1 it becomes even simpler (no need of LAPRXP any |
---|
| 45 | ! more in principle !) : |
---|
| 46 | ! PFk = Pk+1/2 * (1.-ALPHA) except at the top |
---|
| 47 | ! level : |
---|
| 48 | ! PF1 = P1.5 / (2+Cv/R) |
---|
| 49 | |
---|
| 50 | ! Author. |
---|
| 51 | ! ------- |
---|
| 52 | ! Erik Andersson, Mats Hamrud and Philippe Courtier *ECMWF* |
---|
| 53 | |
---|
| 54 | ! Modifications. |
---|
| 55 | ! -------------- |
---|
| 56 | ! Original : 92-11-23 |
---|
| 57 | ! Modified : 95-01-31 by Radmila Bubnova: correction in the case |
---|
| 58 | ! of the other approximation of d (ln p). |
---|
| 59 | ! Modified : 00-11-22 by Agathe Untch: modifications for vertical |
---|
| 60 | ! finite elements |
---|
| 61 | ! M.Hamrud 01-Oct-2003 CY28 Cleaning |
---|
| 62 | ! Modified : 04-11-15 by K. YESSAD: improve the hierarchy of tests |
---|
| 63 | ! Modified : 15-Feb-2005 by K. YESSAD: ZTOPPRES becomes TOPPRES |
---|
| 64 | ! ------------------------------------------------------------------ |
---|
| 65 | |
---|
| 66 | USE PARKIND1 ,ONLY : JPIM ,JPRB |
---|
| 67 | USE YOMHOOK ,ONLY : LHOOK, DR_HOOK |
---|
| 68 | |
---|
| 69 | USE YOMCT0 , ONLY : LAPRXPK |
---|
| 70 | USE YOMDYN , ONLY : NDLNPR |
---|
| 71 | USE YOMCST , ONLY : RD ,RCVD |
---|
| 72 | USE YOMCVER , ONLY : LVERTFE |
---|
| 73 | USE YOMGEM , ONLY : VAF ,VBF ,TOPPRES |
---|
| 74 | |
---|
| 75 | ! ------------------------------------------------------------------ |
---|
| 76 | |
---|
| 77 | IMPLICIT NONE |
---|
| 78 | |
---|
| 79 | INTEGER(KIND=JPIM),INTENT(IN) :: KPROMA |
---|
| 80 | INTEGER(KIND=JPIM),INTENT(IN) :: KFLEV |
---|
| 81 | INTEGER(KIND=JPIM),INTENT(IN) :: KSTART |
---|
| 82 | INTEGER(KIND=JPIM),INTENT(IN) :: KPROF |
---|
| 83 | REAL(KIND=JPRB) :: PVAH(0:KFLEV) ! Argument NOT used |
---|
| 84 | REAL(KIND=JPRB) :: PVBH(0:KFLEV) ! Argument NOT used |
---|
| 85 | REAL(KIND=JPRB) ,INTENT(IN) :: PALPH(KPROMA,KFLEV) |
---|
| 86 | REAL(KIND=JPRB) ,INTENT(IN) :: PRESH(KPROMA,0:KFLEV) |
---|
| 87 | REAL(KIND=JPRB) ,INTENT(OUT) :: PRESF(KPROMA,KFLEV) |
---|
| 88 | |
---|
| 89 | ! ------------------------------------------------------------------ |
---|
| 90 | |
---|
| 91 | INTEGER(KIND=JPIM) :: IFIRST, JLEV, JLON |
---|
| 92 | REAL(KIND=JPRB) :: ZMUL |
---|
| 93 | REAL(KIND=JPRB) :: ZHOOK_HANDLE |
---|
| 94 | |
---|
| 95 | ! ------------------------------------------------------------------ |
---|
| 96 | |
---|
| 97 | IF (LHOOK) CALL DR_HOOK('GPPREF',0,ZHOOK_HANDLE) |
---|
| 98 | |
---|
| 99 | ! ------------------------------------------------------------------ |
---|
| 100 | |
---|
| 101 | !* 1. Level to begin normal computations |
---|
| 102 | ! ---------------------------------- |
---|
| 103 | |
---|
| 104 | ! This is introduced to allow the use of GPPREF without the implicit |
---|
| 105 | ! assumption that the top level input for pressure is 0 hPa. |
---|
| 106 | ! This restriction is only necessary in the case of use of NDLNPR=1. |
---|
[5159] | 107 | |
---|
[1989] | 108 | ! LVERTFE : .T./.F. Finite element/conventional vertical discretisation. |
---|
| 109 | ! NDLNPR : NDLNPR=0: conventional formulation of delta, i.e. ln(P(l)/P(l-1)). |
---|
| 110 | ! NDLNPR=1: formulation of delta used in non hydrostatic model, |
---|
| 111 | ! LAPRXPK : way of computing full-levels pressures in primitive equation |
---|
[5159] | 112 | |
---|
[1989] | 113 | LVERTFE=.TRUE. !!!!! A REVOIR (MPL) comment faut-il vraiment calculer PRESF ? |
---|
| 114 | |
---|
| 115 | IF ((.NOT.LVERTFE).AND.(NDLNPR == 1)) THEN |
---|
| 116 | IF(PRESH(KSTART,0) <= TOPPRES)THEN |
---|
| 117 | IFIRST=2 |
---|
| 118 | ELSE |
---|
| 119 | IFIRST=1 |
---|
| 120 | DO JLON=KSTART,KPROF |
---|
| 121 | IF(PRESH(JLON,0) <= TOPPRES)THEN |
---|
| 122 | IFIRST=2 |
---|
| 123 | EXIT |
---|
| 124 | ENDIF |
---|
| 125 | ENDDO |
---|
| 126 | ENDIF |
---|
| 127 | ENDIF |
---|
| 128 | |
---|
| 129 | ! ------------------------------------------------------------------ |
---|
| 130 | |
---|
| 131 | !* 2. COMPUTES FULL LEVEL PRESSURES. |
---|
| 132 | ! ------------------------------ |
---|
| 133 | |
---|
| 134 | IF (LVERTFE) THEN |
---|
| 135 | DO JLEV=1,KFLEV |
---|
[5160] | 136 | ! PRINT *,'GPPREF: LVERTFE KFLEV KSTART KPROF JLEV',LVERTFE,KFLEV,KSTART,KPROF,JLEV |
---|
[1989] | 137 | PRESF(KSTART:KPROF,JLEV)=VAF(JLEV)+VBF(JLEV)*PRESH(KSTART:KPROF,KFLEV) |
---|
| 138 | ENDDO |
---|
| 139 | ELSE |
---|
| 140 | IF (NDLNPR == 0) THEN |
---|
| 141 | IF (LAPRXPK) THEN |
---|
| 142 | DO JLEV=1,KFLEV |
---|
| 143 | DO JLON=KSTART,KPROF |
---|
| 144 | PRESF(JLON,JLEV)=(PRESH(JLON,JLEV-1)+PRESH(JLON,JLEV))*0.5_JPRB |
---|
| 145 | ENDDO |
---|
| 146 | ENDDO |
---|
| 147 | ELSE |
---|
| 148 | DO JLEV=1,KFLEV |
---|
| 149 | DO JLON=KSTART,KPROF |
---|
| 150 | PRESF(JLON,JLEV)=EXP(-PALPH(JLON,JLEV))*PRESH(JLON,JLEV) |
---|
| 151 | ENDDO |
---|
| 152 | ENDDO |
---|
| 153 | ENDIF |
---|
| 154 | ELSEIF (NDLNPR == 1) THEN |
---|
| 155 | DO JLEV=IFIRST,KFLEV |
---|
| 156 | DO JLON=KSTART,KPROF |
---|
| 157 | PRESF(JLON,JLEV)=(1.0_JPRB-PALPH(JLON,JLEV))*PRESH(JLON,JLEV) |
---|
| 158 | ENDDO |
---|
| 159 | ENDDO |
---|
| 160 | ZMUL=1.0_JPRB/(2.0_JPRB+RCVD/RD) |
---|
| 161 | DO JLEV=1,IFIRST-1 |
---|
| 162 | DO JLON=KSTART,KPROF |
---|
| 163 | PRESF(JLON,JLEV)=PRESH(JLON,JLEV)*ZMUL |
---|
| 164 | ENDDO |
---|
| 165 | ENDDO |
---|
| 166 | ENDIF |
---|
| 167 | ENDIF |
---|
| 168 | |
---|
| 169 | ! ------------------------------------------------------------------ |
---|
| 170 | |
---|
| 171 | IF (LHOOK) CALL DR_HOOK('GPPREF',1,ZHOOK_HANDLE) |
---|
| 172 | END SUBROUTINE GPPREF |
---|