SUBROUTINE MEMSLP_NMM(TPRES,QPRES,FIPRES)
!
!$$$ SUBPROGRAM DOCUMENTATION BLOCK
! . . .
! SUBROUTINE: MEMSLP MEMBRANE SLP REDUCTION
!
! ABSTRACT: THIS ROUTINE COMPUTES THE SEA LEVEL PRESSURE
! REDUCTION USING THE MESINGER RELAXATION
! METHOD FOR SIGMA COORDINATES.
! A BY-PRODUCT IS THE
! SET OF VALUES FOR THE UNDERGROUND TEMPERATURES
! ON THE SPECIFIED PRESSURE LEVELS
!
! PROGRAM HISTORY LOG:
! 99-09-23 T BLACK - REWRITTEN FROM ROUTINE SLP (ETA
! COORDINATES)
! 02-07-26 H CHUANG - PARALLIZE AND MODIFIED FOR WRF A/C GRIDS
! ALSO REDUCE S.O.R. COEFF FROM 1.75 to 1.25
! BECAUSE THERE WAS NUMERICAL INSTABILITY
! 02-08-21 H CHUANG - MODIFIED TO ALWAYS USE OLD TTV FOR RELAXATION
! SO THAT THERE WAS BIT REPRODUCIBILITY BETWEEN
! USING ONE AND MULTIPLE TASKS
! 13-12-06 H CHUANG - REMOVE EXTRA SMOOTHING OF SLP AT THE END
!
! USAGE: CALL SLPSIG FROM SUBROUITNE ETA2P
!
! INPUT ARGUMENT LIST:
! PD - SFC PRESSURE MINUS PTOP
! FIS - SURFACE GEOPOTENTIAL
! T - TEMPERATURE
! Q - SPECIFIC HUMIDITY
! FI - GEOPOTENTIAL
! PT - TOP PRESSURE OF DOMAIN
!
! OUTPUT ARGUMENT LIST:
! PSLP - THE FINAL REDUCED SEA LEVEL PRESSURE ARRAY
!
! SUBPROGRAMS CALLED:
! UNIQUE:
! NONE
!
!-----------------------------------------------------------------------
use vrbls3d, only: pint, zint, t, q
use vrbls2d, only: pslp, fis
use masks, only: lmh
use params_mod, only: overrc, ad05, cft0, g, rd, d608, h1, kslpd
use ctlblk_mod, only: jsta, jend, spl, num_procs, mpi_comm_comp, lsmp1, jsta_m2, jend_m2,&
lm, jsta_m, jend_m, im, jsta_2l, jend_2u, im_jm, lsm, jm
!- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
implicit none
!
INCLUDE "mpif.h"
!-----------------------------------------------------------------------
integer, PARAMETER :: NFILL=0,NRLX1=500,NRLX2=100
!-----------------------------------------------------------------------
real,dimension(IM,JSTA_2L:JEND_2U,LSM),intent(in) :: QPRES
real,dimension(IM,JSTA_2L:JEND_2U,LSM),intent(inout) :: TPRES,FIPRES
REAL :: TTV(IM,JSTA_2L:JEND_2U),TNEW(IM,JSTA_2L:JEND_2U) &
,SLPX(IM,JSTA_2L:JEND_2U) &
,P1(IM,JSTA_2L:JEND_2U),HTM2D(IM,JSTA_2L:JEND_2U)
REAL :: HTMO(IM,JSTA_2L:JEND_2U,LSM)
real P2,GZ1,GZ2,TLYR,SPLL,PCHK,PSFC,SLOPE,TVRT,DIS,TINIT
!-----------------------------------------------------------------------
!-----------------------------------------------------------------------
INTEGER :: KMNTM(LSM),IMNT(IM_JM,LSM),JMNT(IM_JM,LSM) &
,LMHO(IM,JSTA_2L:JEND_2U)
INTEGER :: IHE(JM),IHW(JM),IVE(JM),IVW(JM),IHS(JM),IHN(JM)
integer ii,jj,I,J,L,N,KM,KS,KP,KMN,KMM,KOUNT,LP,LLMH,LHMNT &
,LMHIJ,LMAP1,LXXX,IERR,NRLX,IHH2
!-----------------------------------------------------------------------
LOGICAL :: STDRD,DONE(IM,JSTA_2L:JEND_2U)
!-----------------------------------------------------------------------
STDRD=.FALSE.
!-----------------------------------------------------------------------
!***
!*** CALCULATE THE I-INDEX EAST-WEST INCREMENTS
!***
!
ii=279
jj=314
DO J=1,JM
IHE(J)=MOD(J+1,2)
IHW(J)=IHE(J)-1
ENDDO
! print*,'relaxation coeff= ',OVERRC
!-----------------------------------------------------------------------
!***
!*** INITIALIZE ARRAYS. LOAD SLP ARRAY WITH SURFACE PRESSURE.
!***
!$omp parallel do
DO J=JSTA,JEND
DO I=1,IM
LLMH=NINT(LMH(I,J))
PSLP(I,J)=PINT(I,J,LLMH+1)
if(i.eq.ii.and.j.eq.jj)print*,'Debug: FIS,IC for PSLP=' &
,FIS(i,j),PSLP(I,J)
TTV(I,J)=0.
LMHO(I,J)=0
DONE(I,J)=.FALSE.
ENDDO
ENDDO
!
!*** CALCULATE SEA LEVEL PRESSURE FOR PROFILES (AND POSSIBLY
!*** FOR POSTING BY POST PROCESSOR).
!
!*** "STDRD" REFERS TO THE "STANDARD" SLP REDUCTION SCHEME.
!
IF(STDRD)GO TO 400
!--------------------------------------------------------------------
!***
!*** CREATE A 3-D "HEIGHT MASK" FOR THE SPECIFIED PRESSURE LEVELS
!*** (1 => ABOVE GROUND) AND A 2-D INDICATOR ARRAY THAT SAYS
!*** WHICH PRESSURE LEVEL IS THE LOWEST ONE ABOVE THE GROUND
!***
DO 100 L=1,LSM
SPLL=SPL(L)
!
DO J=JSTA,JEND
DO I=1,IM
PSFC=PSLP(I,J)
PCHK=PSFC
IF(NFILL.GT.0)THEN
PCHK=PINT(I,J,NINT(LMH(I,J))+1-NFILL)
ENDIF
! IF(SM(I,J).GT.0.5.AND.FIS(I,J).LT.1.)PCHK=PSLP(I,J)
IF(FIS(I,J).LT.1.)PCHK=PSLP(I,J)
!
! IF(SPLL.LT.PSFC)THEN
IF(SPLL.LT.PCHK)THEN
HTMO(I,J,L)=1.
ELSE
HTMO(I,J,L)=0.
IF(L.GT.1.AND.HTMO(I,J,L-1).GT.0.5)LMHO(I,J)=L-1
ENDIF
!
IF(L.EQ.LSM.AND.HTMO(I,J,L).GT.0.5)LMHO(I,J)=LSM
if(i.eq.ii.and.j.eq.jj)print*,'Debug: HTMO= ',HTMO(I,J,L)
ENDDO
ENDDO
!
100 CONTINUE
! if(jj.ge.jsta.and.jj.le.jend)
! +print*,'Debug: LMHO=',LMHO(ii,jj)
!--------------------------------------------------------------------
!***
!*** WE REACH THIS LINE IF WE WANT THE MESINGER ETA SLP REDUCTION
!*** BASED ON RELAXATION TEMPERATURES. THE FIRST STEP IS TO
!*** FIND THE HIGHEST LAYER CONTAINING MOUNTAINS.
!***
DO 210 L=LSM,1,-1
!
DO J=JSTA,JEND
DO I=1,IM
IF(HTMO(I,J,L).LT.0.5)GO TO 210
ENDDO
ENDDO
!
LHMNT=L+1
GO TO 220
210 CONTINUE
!
220 CONTINUE
print*,'Debug in SLP: LHMNT=',LHMNT
if ( num_procs .gt. 1 ) then
CALL MPI_ALLREDUCE &
(LHMNT,LXXX,1,MPI_INTEGER,MPI_MIN,MPI_COMM_COMP,IERR)
LHMNT = LXXX
end if
IF(LHMNT.EQ.LSMP1)THEN
GO TO 325
ENDIF
print*,'Debug in SLP: LHMNT A ALLREDUCE=',LHMNT
!***
!*** NOW GATHER THE ADDRESSES OF ALL THE UNDERGROUND POINTS.
!***
!$omp parallel do private(kmn,kount)
DO 250 L=LHMNT,LSM
KMN=0
KMNTM(L)=0
KOUNT=0
DO 240 J=JSTA_M2,JEND_M2
! DO 240 J=JSTA_M,JEND_M
DO 240 I=2,IM-1
KOUNT=KOUNT+1
IMNT(KOUNT,L)=0
JMNT(KOUNT,L)=0
IF(HTMO(I,J,L).GT.0.5)GO TO 240
KMN=KMN+1
IMNT(KMN,L)=I
JMNT(KMN,L)=J
240 CONTINUE
KMNTM(L)=KMN
250 CONTINUE
!
!
!*** CREATE A TEMPORARY TV ARRAY, AND FOLLOW BY SEQUENTIAL
!*** OVERRELAXATION, DOING NRLX PASSES.
!
! IF(NTSD.EQ.1)THEN
NRLX=NRLX1
! ELSE
! NRLX=NRLX2
! ENDIF
!
!$omp parallel do private(i,j,tinit,ttv)
DO 300 L=LHMNT,LSM
!
DO 270 J=JSTA,JEND
DO 270 I=1,IM
TTV(I,J)=TPRES(I,J,L)
IF(TTV(I,J).lt.150. .and. TTV(I,J).gt.325.0)print* &
,'abnormal IC for T relaxation',i,j,TTV(I,J)
HTM2D(I,J)=HTMO(I,J,L)
270 CONTINUE
!
!*** FOR GRID BOXES NEXT TO MOUNTAINS, COMPUTE TV TO USE AS
!*** BOUNDARY CONDITIONS FOR THE RELAXATION UNDERGROUND
!
CALL EXCH2(HTM2D(1,JSTA_2L)) !NEED TO EXCHANGE TWO ROW FOR E GRID
DO J=JSTA_M2,JEND_M2
DO I=2,IM-1
IF(HTM2D(I,J).GT.0.5.AND.HTM2D(I+IHW(J),J-1)*HTM2D(I+IHE(J),J-1) &
*HTM2D(I+IHW(J),J+1)*HTM2D(I+IHE(J),J+1) &
*HTM2D(I-1 ,J )*HTM2D(I+1 ,J ) &
*HTM2D(I ,J-2)*HTM2D(I ,J+2).LT.0.5)THEN
!HC MODIFICATION FOR C AND A GRIDS
!HC IF(HTM2D(I,J).GT.0.5.AND.
!HC 1 HTM2D(I-1,J)*HTM2D(I+1,J)
!HC 2 *HTM2D(I,J-1)*HTM2D(I,J+1)
!HC 3 *HTM2D(I-1,J-1)*HTM2D(I+1,J-1)
!HC 4 *HTM2D(I-1,J+1)*HTM2D(I+1,J+1).LT.0.5)THEN
!
TTV(I,J)=TPRES(I,J,L)*(1.+0.608*QPRES(I,J,L))
ENDIF
! if(i.eq.ii.and.j.eq.jj)print*,'Debug:L,TTV B SMOO= ',l,TTV(I,J)
ENDDO
ENDDO
!
KMM=KMNTM(L)
!
DO 285 N=1,NRLX
CALL EXCH2(TTV(1,JSTA_2L))
! print*,'Debug:L,KMM=',L,KMM
DO 280 KM=1,KMM
I=IMNT(KM,L)
J=JMNT(KM,L)
TINIT=TTV(I,J)
TNEW(I,J)=AD05*(4.*(TTV(I+IHW(J),J-1)+TTV(I+IHE(J),J-1) &
+TTV(I+IHW(J),J+1)+TTV(I+IHE(J),J+1)) &
+TTV(I-1,J) +TTV(I+1,J) &
+TTV(I,J-2) +TTV(I,J+2)) &
-CFT0*TTV(I,J)
!HC MODIFICATION FOR C AND A GRIDS
! eight point relaxation using old TTV
!HC TNEW(I,J)=AD05*(4.*(TTV(I-1,J)+TTV(I+1,J)
!HC 1 +TTV(I,J-1)+TTV(I,J+1))
!HC 2 +TTV(I-1,J-1)+TTV(I+1,J-1)
!HC 3 +TTV(I-1,J+1)+TTV(I+1,J+1))
!HC 4 -CFT0*TTV(I,J)
!
! if(i.eq.ii.and.j.eq.jj)print*,'Debug: L,TTV A S'
! 1,l,TTV(I,J),N
! 1,l,TNEW(I,J),N
280 CONTINUE
!
DO KM=1,KMM
I=IMNT(KM,L)
J=JMNT(KM,L)
TTV(I,J)=TNEW(I,J)
END DO
285 CONTINUE
!
DO 290 KM=1,KMM
I=IMNT(KM,L)
J=JMNT(KM,L)
TPRES(I,J,L)=TTV(I,J)
290 CONTINUE
300 CONTINUE
!----------------------------------------------------------------
!***
!*** CALCULATE THE SEA LEVEL PRESSURE AS PER THE NEW SCHEME.
!*** INTEGRATE THE HYDROSTATIC EQUATION DOWNWARD FROM THE
!*** GROUND THROUGH EACH OUTPUT PRESSURE LEVEL (WHERE TV
!*** IS NOW KNOWN) TO FIND GZ AT THE NEXT MIDPOINT BETWEEN
!*** PRESSURE LEVELS. WHEN GZ=0 IS REACHED, SOLVE FOR THE
!*** PRESSURE.
!***
!
!*** COUNT THE POINTS WHERE SLP IS DONE BELOW EACH OUTPUT LEVEL
!
KOUNT=0
DO J=JSTA,JEND
DO I=1,IM
! P1(I,J)=SPL(NINT(LMH(I,J)))
! DONE(I,J)=.FALSE.
IF(abs(FIS(I,J)).LT.1.)THEN
PSLP(I,J)=PINT(I,J,NINT(LMH(I,J))+1)
DONE(I,J)=.TRUE.
KOUNT=KOUNT+1
if(i.eq.ii.and.j.eq.jj)print*,'Debug:DONE,PSLP A S1=' &
,done(i,j),PSLP(I,J)
ELSE IF(FIS(I,J).LT.-1.0) THEN
DO L=LM,1,-1
IF(ZINT(I,J,L).GT.0.)THEN
PSLP(I,J)=PINT(I,J,L)/EXP(-ZINT(I,J,L)*G &
/(RD*T(I,J,L)*(Q(I,J,L)*D608+1.0)))
DONE(I,J)=.TRUE.
if(i.eq.ii.and.j.eq.jj)print* &
,'Debug:DONE,PINT,PSLP A S1=' &
,done(i,j),PINT(I,J,L),PSLP(I,J)
GO TO 302
END IF
END DO
302 CONTINUE
ENDIF
ENDDO
ENDDO
!
KMM=KMNTM(LSM)
!$omp parallel do private(gz1,gz2,i,j,lmap1,p1,p2),shared(pslp)
DO 320 KM=1,KMM
I=IMNT(KM,LSM)
J=JMNT(KM,LSM)
IF(DONE(I,J))GO TO 320
LMHIJ=LMHO(I,J)
GZ1=FIPRES(I,J,LMHIJ)
P1(I,J)=SPL(LMHIJ)
!
LMAP1=LMHIJ+1
DO L=LMAP1,LSM
P2=SPL(L)
TLYR=0.5*(TPRES(I,J,L)+TPRES(I,J,L-1))
GZ2=GZ1+RD*TLYR*ALOG(P1(I,J)/P2)
FIPRES(I,J,L)=GZ2
! if(i.eq.ii.and.j.eq.jj)print*,'Debug:L,FI A S2=',L,GZ2
IF(GZ2.LE.0.)THEN
PSLP(I,J)=P1(I,J)/EXP(-GZ1/(RD*TPRES(I,J,L-1)))
! if(i.eq.ii.and.j.eq.jj)print*,'Debug:PSLP A S2=',PSLP(I,J)
DONE(I,J)=.TRUE.
KOUNT=KOUNT+1
GO TO 320
ENDIF
P1(I,J)=P2
GZ1=GZ2
ENDDO
!HC EXPERIMENT
LP=LSM
SLOPE=-6.6E-4
TLYR=TPRES(I,J,LP)-0.5*FIPRES(I,J,LP)*SLOPE
PSLP(I,J)=spl(lp)/EXP(-FIPRES(I,J,LP)/(RD*TLYR))
DONE(I,J)=.TRUE.
! if(i.eq.ii.and.j.eq.jj)print*,'Debug:spl,FI,TLYR,PSLPA3=' &
! ,spl(lp),FIPRES(I,J,LP),TLYR,PSLP(I,J)
!HC EXPERIMENT
320 CONTINUE
!
!*** WHEN SEA LEVEL IS BELOW THE LOWEST OUTPUT PRESSURE LEVEL,
!*** SOLVE THE HYDROSTATIC EQUATION BY CHOOSING A TEMPERATURE
!*** AT THE MIDPOINT OF THE LAYER BETWEEN THAT LOWEST PRESSURE
!*** LEVEL AND THE GROUND BY EXTRAPOLATING DOWNWARD FROM T ON
!*** THE LOWEST PRESSURE LEVEL USING THE DT/DFI BETWEEN THE
!*** LOWEST PRESSURE LEVEL AND THE ONE ABOVE IT.
!
! TOTAL=(IM-2)*(JM-4)
!
!HC DO 340 LP=LSM,1,-1
! IF(KOUNT.EQ.TOTAL)GO TO 350
!HC MODIFICATION FOR SMALL HILL HIGH PRESSURE SITUATION
!HC IF SURFACE PRESSURE IS CLOSER TO SEA LEVEL THAN LWOEST
!HC OUTPUT PRESSURE LEVEL, USE SURFACE PRESSURE TO DO EXTRAPOLATION
325 CONTINUE
LP=LSM
DO 330 J=JSTA,JEND
DO 330 I=1,IM
if(i.eq.ii.and.j.eq.jj)print*,'Debug: with 330 loop'
IF(DONE(I,J))GO TO 330
if(i.eq.ii.and.j.eq.jj)print*,'Debug: still within 330 loop'
!HC Comment out the following line for situation with terrain
!HC at boundary (ie FIPRES<0)
!HC because they were not counted as undergound point for 8 pt
!HC relaxation
!HC IF(FIPRES(I,J,LP).LT.0.)GO TO 330
! IF(FIPRES(I,J,LP).LT.0.)THEN
! DO LP=LSM,1,-1
! IF (FIPRES(I,J) .LE. 0)
! IF(FIPRES(I,J,LP).LT.0..OR.DONE(I,J))GO TO 330
! SLOPE=(TPRES(I,J,LP)-TPRES(I,J,LP-1))
! & /(FIPRES(I,J,LP)-FIPRES(I,J,LP-1))
SLOPE=-6.6E-4
IF(PINT(I,J,NINT(LMH(I,J))+1).GT.SPL(LP))THEN
LLMH=NINT(LMH(I,J))
TVRT=T(I,J,LLMH)*(H1+D608*Q(I,J,LLMH))
DIS=ZINT(I,J,LLMH+1)-ZINT(I,J,LLMH)+0.5*ZINT(I,J,LLMH+1)
TLYR=TVRT-DIS*G*SLOPE
PSLP(I,J)=PINT(I,J,LLMH+1)*EXP(ZINT(I,J,LLMH+1)*G/(RD*TLYR))
! if(i.eq.ii.and.j.eq.jj)print*,'Debug:PSFC,zsfc,TLYR,PSLPA3='
! 1,PINT(I,J,LLMH+1),ZINT(I,J,LLMH+1),TLYR,PSLP(I,J)
ELSE
TLYR=TPRES(I,J,LP)-0.5*FIPRES(I,J,LP)*SLOPE
PSLP(I,J)=spl(lp)/EXP(-FIPRES(I,J,LP)/(RD*TLYR))
if(i.eq.ii.and.j.eq.jj)print*,'Debug:spl,FI,TLYR,PSLPA3=' &
,spl(lp),FIPRES(I,J,LP),TLYR,PSLP(I,J)
END IF
DONE(I,J)=.TRUE.
KOUNT=KOUNT+1
330 CONTINUE
!HC 340 CONTINUE
!
350 CONTINUE
!--------------------------------------------------------------------
! SKIP THE STANDARD SCHEME.
!--------------------------------------------------------------------
GO TO 430
!--------------------------------------------------------------------
!***
!*** IF YOU WANT THE "STANDARD" ETA/SIGMA REDUCTION
!*** THIS IS WHERE IT IS DONE.
!***
400 CONTINUE
!
!****************************************************************
! AT THIS POINT WE HAVE A SEA LEVEL PRESSURE FIELD BY
! EITHER METHOD. 5-POINT AVERAGE THE FIELD ON THE E-GRID.
!****************************************************************
!
430 CONTINUE
!----------------------------------------------------------------
RETURN
END