! (C) Copyright 2001- ECMWF. ! (C) Copyright 2001- Meteo-France. ! ! This software is licensed under the terms of the Apache Licence Version 2.0 ! which can be obtained at http://www.apache.org/licenses/LICENSE-2.0. ! In applying this licence, ECMWF does not waive the privileges and immunities ! granted to it by virtue of its status as an intergovernmental organisation ! nor does it submit to any jurisdiction. ! MODULE EUVTVD_MOD CONTAINS SUBROUTINE EUVTVD(KM,KMLOC,KFIELD,PU,PV,PVOR,PDIV) !**** *EUVTVD* - Compute vor/div from u and v in spectral space ! Purpose. ! -------- ! To compute vorticity and divergence from u and v in spectral ! space. Input u and v from KM to NTMAX+1, output vorticity and ! divergence from KM to NTMAX - calculation part. !** Interface. ! ---------- ! CALL EUVTVD(KM,KFIELD,PEPSNM,PU,PV,PVOR,PDIV) ! Explicit arguments : KM - zonal wave-number ! -------------------- KFIELD - number of fields (levels) ! PEPSNM - REPSNM for wavenumber KM ! PU - u wind component for zonal ! wavenumber KM ! PV - v wind component for zonal ! wavenumber KM ! PVOR - vorticity for zonal ! wavenumber KM ! PDIV - divergence for zonal ! wavenumber KM ! Method. See ref. ! ------- ! Externals. None. ! ---------- ! Reference. ! ---------- ! ECMWF Research Department documentation of the IFS ! Author. ! ------- ! Mats Hamrud and Philippe Courtier *ECMWF* ! Modifications. ! -------------- ! Original : 91-07-01 ! D. Giard : NTMAX instead of NSMAX ! 01-08-27 : R. El Khatib Fix for NPROMATR /= 0 ! 03-03-03 : G. Radnoti: b-level conform mean-wind distribution ! M.Hamrud 01-Oct-2003 CY28 Cleaning ! F. Vana + NEC 28-Apr-2009 MPI-OpenMP fix ! D. Degrauwe (Feb 2012): Alternative extension zone (E') ! N. Lopes & R. El Khatib 15-Jun-2012 Scalability enhancement ! R. El Khatib 02-Jun-2022 Optimization/Cleaning ! ------------------------------------------------------------------ USE PARKIND1 ,ONLY : JPIM ,JPRB USE YOMHOOK ,ONLY : LHOOK, DR_HOOK, JPHOOK USE TPM_DIM ,ONLY : R USE TPMALD_GEO ,ONLY : GALD USE TPMALD_DISTR ,ONLY : DALD IMPLICIT NONE INTEGER(KIND=JPIM), INTENT(IN) :: KM INTEGER(KIND=JPIM), INTENT(IN) :: KMLOC INTEGER(KIND=JPIM), INTENT(IN) :: KFIELD REAL(KIND=JPRB), INTENT(IN) :: PU(:,:) REAL(KIND=JPRB), INTENT(IN) :: PV(:,:) REAL(KIND=JPRB), INTENT(OUT):: PVOR(:,:) REAL(KIND=JPRB), INTENT(OUT):: PDIV(:,:) INTEGER(KIND=JPIM) :: II, IN, IR, J, JN REAL(KIND=JPRB) :: ZKM, ZIN REAL(KIND=JPHOOK) :: ZHOOK_HANDLE ! ------------------------------------------------------------------ IF (LHOOK) CALL DR_HOOK('EUVTVD_MOD:EUVTVD',0,ZHOOK_HANDLE) !* 1. COMPUTE U V FROM VORTICITY AND DIVERGENCE. ! ------------------------------------------ ZKM=REAL(KM,JPRB)*GALD%EXWN ! Initialize to zero what would not get assigned in Loop 1, ! but is accessed in Loop 2! PDIV(R%NDGL+R%NNOEXTZG:,:)=0 PVOR(R%NDGL+R%NNOEXTZG:,:)=0 ! Loop 1 DO J=1,KFIELD IR=2*J-1 II=IR+1 ! Warning, this loop does not initialize the entire array! DO JN=1,R%NDGL+R%NNOEXTZG PDIV(JN,IR)=-ZKM*PU(JN,II) PDIV(JN,II)= ZKM*PU(JN,IR) PVOR(JN,IR)=-ZKM*PV(JN,II) PVOR(JN,II)= ZKM*PV(JN,IR) ENDDO ENDDO ! Loop 2 DO J=1,2*KFIELD DO JN=1,DALD%NCPL2M(KM),2 IN=(JN-1)/2 ZIN=REAL(IN,JPRB)*GALD%EYWN PVOR(JN,J )=PVOR(JN ,J)+ZIN*PU(JN+1,J) PVOR(JN+1,J)=PVOR(JN+1,J)-ZIN*PU(JN ,J) PDIV(JN,J )=PDIV(JN ,J)-ZIN*PV(JN+1,J) PDIV(JN+1,J)=PDIV(JN+1,J)+ZIN*PV(JN ,J) ENDDO ENDDO IF (LHOOK) CALL DR_HOOK('EUVTVD_MOD:EUVTVD',1,ZHOOK_HANDLE) END SUBROUTINE EUVTVD END MODULE EUVTVD_MOD