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C $Header$ |
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C $Name$ |
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#include "EXF_OPTIONS.h" |
#include "EXF_OPTIONS.h" |
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CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC |
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C Flux Coupler using C |
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C Bilinear interpolation of forcing fields C |
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C C |
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C B. Cheng (12/2002) C |
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C C |
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C added Bicubic (bnc 1/2003) C |
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C C |
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CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC |
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real*8 function lagran(i,x,a,sp) |
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INTEGER i,k,sp |
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_RS x |
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real*8 a(4) |
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real*8 numer,denom |
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numer = 1.D0 |
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denom = 1.D0 |
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do k=1,sp |
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if ( k .ne. i) then |
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denom = denom*(a(i) - a(k)) |
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numer = numer*(x - a(k)) |
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endif |
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enddo |
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lagran = numer/denom |
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return |
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end |
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SUBROUTINE exf_interp( |
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I infile, |
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I filePrec, |
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O arrayout, |
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I irecord, xG, yG, |
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I lon_0, lon_inc, |
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I lat_0, lat_inc, |
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I nx_in, ny_in, method, mythid) |
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implicit none |
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C infile = name of the input file (direct access binary) |
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C filePrec = file precicision (currently not used, assumes real*4) |
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C arrout = output arrays (different for each processor) |
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C irecord = record number in global file |
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C xG,yG = coordinates for output grid |
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C lon_0, lat_0 = lon and lat of sw corner of global input grid |
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C lon_inc = scalar x-grid increment |
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C lat_inc = vector y-grid increments |
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C nx_in, ny_in = input x-grid and y-grid size |
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C method = 1 for bilinear 2 for bicubic |
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C mythid = thread id |
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C |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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CBOP |
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C !ROUTINE: EXF_INTERP |
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C !INTERFACE: |
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SUBROUTINE EXF_INTERP( |
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I inFile, filePrec, |
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O arrayout, |
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I irecord, xG_in, yG, |
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I lon_0, lon_inc, lat_0, lat_inc, |
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I nxIn, nyIn, method, myIter, myThid ) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | SUBROUTINE EXF_INTERP |
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C | o Load from file a regular lat-lon input field |
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C | and interpolate on to the model grid location |
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C *==========================================================* |
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C \ev |
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C !USES: |
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IMPLICIT NONE |
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C === Global variables === |
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#include "SIZE.h" |
#include "SIZE.h" |
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#include "EEPARAMS.h" |
#include "EEPARAMS.h" |
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#include "PARAMS.h" |
#include "PARAMS.h" |
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#ifdef ALLOW_DEBUG |
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# include "EXF_PARAM.h" |
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#endif |
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C subroutine variables |
C !INPUT/OUTPUT PARAMETERS: |
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character*(*) infile |
C inFile (string) :: name of the binary input file (direct access) |
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integer filePrec, irecord, nx_in, ny_in |
C filePrec (integer) :: number of bits per word in file (32 or 64) |
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C arrayout ( _RL ) :: output array |
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C irecord (integer) :: record number to read |
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C xG_in,yG :: coordinates for output grid to interpolate to |
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C lon_0, lat_0 :: lon and lat of sw corner of global input grid |
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C lon_inc :: scalar x-grid increment |
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C lat_inc :: vector y-grid increments |
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C nxIn,nyIn (integer) :: size in x & y direction of input file to read |
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C method :: 1,11,21 for bilinear; 2,12,22 for bicubic |
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C :: 1,2 for tracer; 11,12 for U; 21,22 for V |
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C myIter (integer) :: current iteration number |
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C myThid (integer) :: My Thread Id number |
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CHARACTER*(*) inFile |
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INTEGER filePrec, irecord, nxIn, nyIn |
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_RL arrayout(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
_RL arrayout(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RS xG (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
_RS xG_in (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RS yG (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
_RS yG (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL lon_0, lon_inc |
_RL lon_0, lon_inc |
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_RL lat_0, lat_inc(ny_in-1) |
c _RL lat_0, lat_inc(nyIn-1) |
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integer method, mythid |
_RL lat_0, lat_inc(*) |
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INTEGER method, myIter, myThid |
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C !FUNCTIONS: |
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#ifdef ALLOW_DEBUG |
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INTEGER ILNBLNK |
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EXTERNAL ILNBLNK |
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#endif |
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C !LOCAL VARIABLES: |
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C arrayin :: input field array (loaded from file) |
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C x_in :: longitude vector defining input field grid |
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C y_in :: latitude vector defining input field grid |
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C w_ind :: input field longitudinal index, on western side of model grid pt |
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C s_ind :: input field latitudinal index, on southern side of model grid pt |
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C bi, bj :: tile indices |
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C i, j, k, l :: loop indices |
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C msgBuf :: Informational/error message buffer |
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_RL arrayin( -1:nxIn+2, -1:nyIn+2 ) |
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_RL x_in(-1:nxIn+2), y_in(-1:nyIn+2) |
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INTEGER w_ind(sNx,sNy), s_ind(sNx,sNy) |
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INTEGER bi, bj |
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INTEGER i, j, k, l |
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INTEGER nLoop |
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_RL tmpVar |
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_RS xG(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RS threeSixtyRS |
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_RL yPole, symSign, poleValue |
| 86 |
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PARAMETER ( threeSixtyRS = 360. ) |
| 87 |
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PARAMETER ( yPole = 90. ) |
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INTEGER nxd2 |
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LOGICAL xIsPeriodic, poleSymmetry |
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#ifdef ALLOW_DEBUG |
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LOGICAL debugFlag |
| 92 |
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CHARACTER*(MAX_LEN_MBUF) msgBuf |
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_RS prtPole(-1:4) |
| 94 |
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#endif |
| 95 |
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CEOP |
| 96 |
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| 97 |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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C--- Load inut field |
| 99 |
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| 100 |
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CALL EXF_INTERP_READ( |
| 101 |
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I inFile, filePrec, |
| 102 |
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O arrayin, |
| 103 |
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I irecord, nxIn, nyIn, myThid ) |
| 104 |
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| 105 |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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C--- Prepare input grid and input field |
| 107 |
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C-- setup input longitude grid |
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DO i=-1,nxIn+2 |
| 110 |
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x_in(i) = lon_0 + (i-1)*lon_inc |
| 111 |
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ENDDO |
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xIsPeriodic = nxIn.EQ.NINT( threeSixtyRS / lon_inc ) |
| 113 |
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nxd2 = NINT( nxIn*0.5 ) |
| 114 |
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poleSymmetry = xIsPeriodic .AND. ( nxIn.EQ.2*nxd2 ) |
| 115 |
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#ifdef EXF_USE_OLD_INTERP_POLE |
| 116 |
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poleSymmetry = .FALSE. |
| 117 |
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#endif |
| 118 |
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| 119 |
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C-- setup input latitude grid |
| 120 |
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y_in(1) = lat_0 |
| 121 |
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DO j=1,nyIn+1 |
| 122 |
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i = MIN(j,nyIn-1) |
| 123 |
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y_in(j+1) = y_in(j) + lat_inc(i) |
| 124 |
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ENDDO |
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y_in(0) = y_in(1) - lat_inc(1) |
| 126 |
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y_in(-1)= y_in(0) - lat_inc(1) |
| 127 |
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#ifdef ALLOW_DEBUG |
| 128 |
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DO l=-1,4 |
| 129 |
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prtPole(l) = 0. |
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ENDDO |
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#endif |
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C-- For tracer (method=1,2) add 1 row @ the pole (if last row is not) |
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C and will fill it with the polarmost-row zonally averaged value. |
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C For vector component, cannot do much without the other component; |
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C averaging properly done if uvInterp=T in S/R EXF_INTERP_UV |
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#ifdef EXF_USE_OLD_INTERP_POLE |
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IF ( .TRUE. ) THEN |
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#else |
| 139 |
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IF ( method.LT.10 ) THEN |
| 140 |
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C- Add 2 row @ southern end; if one is beyond S.pole, put one @ S.pole |
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j = 0 |
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IF ( ABS(y_in(j+1)).LT.yPole .AND. ABS(y_in(j)).GT.yPole ) THEN |
| 143 |
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y_in(j) = -yPole |
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y_in(j-1) = -2.*yPole - y_in(1) |
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#ifdef ALLOW_DEBUG |
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prtPole(j) = 1. |
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prtPole(j-1) = 2. |
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#endif |
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ENDIF |
| 150 |
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j = -1 |
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IF ( ABS(y_in(j+1)).GT.yPole .AND. ABS(y_in(j)).GT.yPole ) THEN |
| 152 |
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y_in(j) = -yPole |
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#ifdef ALLOW_DEBUG |
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prtPole(j) = 1. |
| 155 |
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#endif |
| 156 |
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ENDIF |
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#endif /* EXF_USE_OLD_INTERP_POLE */ |
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C- Add 2 row @ northern end; if one is beyond N.pole, put one @ N.pole |
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j = nyIn+1 |
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IF ( ABS(y_in(j-1)).LT.yPole .AND. ABS(y_in(j)).GT.yPole ) THEN |
| 161 |
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y_in(j) = yPole |
| 162 |
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y_in(j+1) = 2.*yPole - y_in(j-1) |
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#ifdef ALLOW_DEBUG |
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prtPole(3) = 1. |
| 165 |
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prtPole(3+1) = 2. |
| 166 |
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#endif |
| 167 |
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ENDIF |
| 168 |
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j = nyIn+2 |
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IF ( ABS(y_in(j-1)).LT.yPole .AND. ABS(y_in(j)).GT.yPole ) THEN |
| 170 |
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y_in(j) = yPole |
| 171 |
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#ifdef ALLOW_DEBUG |
| 172 |
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prtPole(4) = 1. |
| 173 |
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#endif |
| 174 |
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ENDIF |
| 175 |
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ENDIF |
| 176 |
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| 177 |
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C-- Enlarge boundary |
| 178 |
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IF ( xIsPeriodic ) THEN |
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C- fill-in added column assuming periodicity |
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DO j=1,nyIn |
| 181 |
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arrayin( 0,j) = arrayin(nxIn ,j) |
| 182 |
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arrayin(-1,j) = arrayin(nxIn-1,j) |
| 183 |
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arrayin(nxIn+1,j) = arrayin(1,j) |
| 184 |
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arrayin(nxIn+2,j) = arrayin(2,j) |
| 185 |
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ENDDO |
| 186 |
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ELSE |
| 187 |
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C- fill-in added column from nearest column |
| 188 |
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DO j=1,nyIn |
| 189 |
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arrayin( 0,j) = arrayin(1,j) |
| 190 |
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arrayin(-1,j) = arrayin(1,j) |
| 191 |
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arrayin(nxIn+1,j) = arrayin(nxIn,j) |
| 192 |
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arrayin(nxIn+2,j) = arrayin(nxIn,j) |
| 193 |
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ENDDO |
| 194 |
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ENDIF |
| 195 |
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symSign = 1. _d 0 |
| 196 |
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IF ( method.GE.10 ) symSign = -1. _d 0 |
| 197 |
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DO l=-1,2 |
| 198 |
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j = l |
| 199 |
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IF ( l.GE.1 ) j = nyIn+l |
| 200 |
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k = MAX(1,MIN(j,nyIn)) |
| 201 |
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IF ( poleSymmetry .AND. ABS(y_in(j)).GT.yPole ) THEN |
| 202 |
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C- fill-in added row assuming pole-symmetry |
| 203 |
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DO i=-1,nxd2 |
| 204 |
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arrayin(i,j) = symSign*arrayin(i+nxd2,k) |
| 205 |
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ENDDO |
| 206 |
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DO i=1,nxd2+2 |
| 207 |
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arrayin(i+nxd2,j) = symSign*arrayin(i,k) |
| 208 |
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ENDDO |
| 209 |
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#ifdef ALLOW_DEBUG |
| 210 |
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i = l + 2*( (l+1)/2 ) |
| 211 |
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prtPole(i) = prtPole(i) + 0.2 |
| 212 |
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#endif |
| 213 |
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ELSE |
| 214 |
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C- fill-in added row from nearest column values |
| 215 |
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DO i=-1,nxIn+2 |
| 216 |
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arrayin(i,j) = arrayin(i,k) |
| 217 |
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ENDDO |
| 218 |
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ENDIF |
| 219 |
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ENDDO |
| 220 |
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| 221 |
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C-- For tracer (method=1,2) set to northernmost zonal-mean value |
| 222 |
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C at 90N to avoid sharp zonal gradients near the Pole. |
| 223 |
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C For vector component, cannot do much without the other component; |
| 224 |
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C averaging properly done if uvInterp=T in S/R EXF_INTERP_UV |
| 225 |
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#ifdef EXF_USE_OLD_INTERP_POLE |
| 226 |
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IF ( .TRUE. ) THEN |
| 227 |
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DO l= 3,4 |
| 228 |
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#else |
| 229 |
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IF ( method.LT.10 ) THEN |
| 230 |
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DO l=-1,4 |
| 231 |
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#endif |
| 232 |
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j = l |
| 233 |
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IF ( l.GE.2 ) j = nyIn+l-2 |
| 234 |
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IF ( ABS(y_in(j)).EQ.yPole ) THEN |
| 235 |
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IF (method.EQ.1 .OR. method.EQ.2) THEN |
| 236 |
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poleValue = 0. |
| 237 |
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DO i=1,nxIn |
| 238 |
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poleValue = poleValue + arrayin(i,j) |
| 239 |
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ENDDO |
| 240 |
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poleValue = poleValue / nxIn |
| 241 |
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DO i=-1,nxIn+2 |
| 242 |
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arrayin(i,j) = poleValue |
| 243 |
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ENDDO |
| 244 |
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#ifdef ALLOW_DEBUG |
| 245 |
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prtPole(l) = prtPole(l) + 0.1 |
| 246 |
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#endif |
| 247 |
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#ifdef EXF_USE_OLD_INTERP_POLE |
| 248 |
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ELSEIF (method.EQ.11 .OR. method.EQ.12) THEN |
| 249 |
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DO i=-1,nxIn+2 |
| 250 |
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arrayin(i,j) = 0. |
| 251 |
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ENDDO |
| 252 |
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#ifdef ALLOW_DEBUG |
| 253 |
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prtPole(l) = prtPole(l) + 0.9 |
| 254 |
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#endif |
| 255 |
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#endif /* EXF_USE_OLD_INTERP_POLE */ |
| 256 |
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ENDIF |
| 257 |
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ENDIF |
| 258 |
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ENDDO |
| 259 |
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ENDIF |
| 260 |
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| 261 |
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#ifdef ALLOW_DEBUG |
| 262 |
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debugFlag = ( exf_debugLev.GE.debLevC ) |
| 263 |
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& .OR. ( exf_debugLev.GE.debLevB .AND. myIter.LE.nIter0 ) |
| 264 |
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C prtPole(l)=0 : extended, =1 : changed to pole, =2 : changed to symetric |
| 265 |
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IF ( debugFlag ) THEN |
| 266 |
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l = ILNBLNK(inFile) |
| 267 |
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_BEGIN_MASTER(myThid) |
| 268 |
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WRITE(msgBuf,'(3A,I6,A,2L5)') |
| 269 |
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& 'EXF_INTERP: file="',inFile(1:l),'", rec=', irecord, |
| 270 |
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& ' , x-Per,P.Sym=', xIsPeriodic, poleSymmetry |
| 271 |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
| 272 |
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& SQUEEZE_RIGHT, myThid ) |
| 273 |
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WRITE(msgBuf,'(2A,3F4.1,A,3F12.6)') 'S.edge (j=-1,0,1) :', |
| 274 |
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& ' proc=', (prtPole(j),j=-1,1), ', yIn=', (y_in(j),j=-1,1) |
| 275 |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
| 276 |
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& SQUEEZE_RIGHT, myThid ) |
| 277 |
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WRITE(msgBuf,'(2A,3F4.1,A,3F12.6)') 'N.edge (j=+0,+1,+2)', |
| 278 |
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& ' proc=', (prtPole(j),j=2,4), ', yIn=',(y_in(j),j=nyIn,nyIn+2) |
| 279 |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
| 280 |
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& SQUEEZE_RIGHT, myThid ) |
| 281 |
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_END_MASTER(myThid) |
| 282 |
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ENDIF |
| 283 |
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#endif /* ALLOW_DEBUG */ |
| 284 |
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| 285 |
C local variables |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 286 |
real*8 ne_fac,nw_fac,se_fac,sw_fac |
C--- Prepare output grid and interpolate for each tile |
| 287 |
integer e_ind(snx,sny),w_ind(snx,sny) |
|
| 288 |
integer n_ind(snx,sny),s_ind(snx,sny) |
C-- put xG in interval [ lon_0 , lon_0+360 [ |
| 289 |
real*8 px_ind(4), py_ind(4), ew_val(4) |
DO bj=myByLo(myThid),myByHi(myThid) |
| 290 |
external lagran |
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 291 |
real*8 lagran |
DO j=1-OLy,sNy+OLy |
| 292 |
real*4 arrayin(-1:nx_in+2 , -1:ny_in+2) |
DO i=1-OLx,sNx+OLx |
| 293 |
real*8 x_in (-1:nx_in+2), y_in(-1:ny_in+2) |
xG(i,j,bi,bj) = xG_in(i,j,bi,bj)-lon_0 |
| 294 |
integer i, j, k, l, js, bi, bj, sp, interp_unit |
& + threeSixtyRS*2. |
| 295 |
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xG(i,j,bi,bj) = lon_0+MOD(xG(i,j,bi,bj),threeSixtyRS) |
| 296 |
call exf_interp_read( |
ENDDO |
| 297 |
I infile, |
ENDDO |
| 298 |
I filePrec, |
#ifdef ALLOW_DEBUG |
| 299 |
O arrayin, |
C-- Check validity of input/output coordinates |
| 300 |
I irecord, xG, yG, |
IF ( debugFlag ) THEN |
| 301 |
I lon_0, lon_inc, |
DO j=1,sNy |
| 302 |
I lat_0, lat_inc, |
DO i=1,sNx |
| 303 |
I nx_in, ny_in, method, mythid) |
IF ( xG(i,j,bi,bj) .LT. x_in(0) .OR. |
| 304 |
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& xG(i,j,bi,bj) .GE. x_in(nxIn+1) .OR. |
| 305 |
_BEGIN_MASTER( myThid ) |
& yG(i,j,bi,bj) .LT. y_in(0) .OR. |
| 306 |
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& yG(i,j,bi,bj) .GE. y_in(nyIn+1) ) THEN |
| 307 |
C setup input grid |
l = ILNBLNK(inFile) |
| 308 |
do i=-1,nx_in+2 |
WRITE(msgBuf,'(3A,I6)') |
| 309 |
x_in(i) = lon_0 + (i-1.)*lon_inc |
& 'EXF_INTERP: file="', inFile(1:l), '", rec=', irecord |
| 310 |
enddo |
CALL PRINT_ERROR( msgBuf, myThid ) |
| 311 |
y_in(0) = lat_0 - lat_inc(1) |
WRITE(msgBuf,'(A)') |
| 312 |
y_in(-1)= lat_0 - 2.*lat_inc(1) |
& 'EXF_INTERP: input grid must encompass output grid.' |
| 313 |
y_in(1) = lat_0 |
CALL PRINT_ERROR( msgBuf, myThid ) |
| 314 |
do j=2,ny_in |
WRITE(msgBuf,'(A,2I8,2I6,A,1P2E14.6)') 'i,j,bi,bj=', |
| 315 |
y_in(j) = y_in(j-1) + lat_inc(j-1) |
& i,j,bi,bj, ' , xG,yG=', xG(i,j,bi,bj), yG(i,j,bi,bj) |
| 316 |
enddo |
CALL PRINT_ERROR( msgBuf, myThid ) |
| 317 |
y_in(ny_in+1) = y_in(ny_in) + lat_inc(ny_in-1) |
WRITE(msgBuf,'(A,I9,A,1P2E14.6)') 'nxIn=', nxIn, |
| 318 |
y_in(ny_in+2) = y_in(ny_in) + 2.*lat_inc(ny_in-1) |
& ' , x_in(0,nxIn+1)=', x_in(0) ,x_in(nxIn+1) |
| 319 |
|
CALL PRINT_ERROR( msgBuf, myThid ) |
| 320 |
C enlarge boundary |
WRITE(msgBuf,'(A,I9,A,1P2E14.6)') 'nyIn=', nyIn, |
| 321 |
do j=1,ny_in |
& ' , y_in(0,nyIn+1)=', y_in(0) ,y_in(nyIn+1) |
| 322 |
arrayin(0,j) = arrayin(nx_in,j) |
CALL PRINT_ERROR( msgBuf, myThid ) |
| 323 |
arrayin(-1,j) = arrayin(nx_in-1,j) |
STOP 'ABNORMAL END: S/R EXF_INTERP' |
| 324 |
arrayin(nx_in+1,j) = arrayin(1,j) |
ENDIF |
| 325 |
arrayin(nx_in+2,j) = arrayin(2,j) |
ENDDO |
| 326 |
enddo |
ENDDO |
| 327 |
do i=-1,nx_in+2 |
ENDIF |
| 328 |
arrayin(i,0) = arrayin(i,1) |
#endif /* ALLOW_DEBUG */ |
| 329 |
arrayin(i,-1) = arrayin(i,1) |
ENDDO |
| 330 |
arrayin(i,ny_in+1) = arrayin(i,ny_in) |
ENDDO |
| 331 |
arrayin(i,ny_in+2) = arrayin(i,ny_in) |
|
| 332 |
enddo |
DO bj = myByLo(myThid), myByHi(myThid) |
| 333 |
|
DO bi = myBxLo(myThid), myBxHi(myThid) |
| 334 |
_END_MASTER( myThid ) |
|
| 335 |
|
C-- Compute interpolation lon & lat index mapping |
| 336 |
do bj = mybylo(mythid), mybyhi(mythid) |
C-- latitude index |
| 337 |
do bi = mybxlo(mythid), mybxhi(mythid) |
DO j=1,sNy |
| 338 |
|
DO i=1,sNx |
| 339 |
C check validity of input/output coordinates |
s_ind(i,j) = 0 |
| 340 |
#ifdef ALLOW_DEBUG |
w_ind(i,j) = nyIn+1 |
| 341 |
if ( debugLevel .ge. debLevB ) then |
ENDDO |
| 342 |
do i=1,snx |
ENDDO |
| 343 |
do j=1,sny |
C # of pts = nyIn+2 ; # of interval = nyIn+1 ; evaluate nLoop as |
| 344 |
if ( xG(i,j,bi,bj) .lt. x_in(0) .or. |
C 1 + truncated log2(# interval -1); add epsil=1.e-3 for safey |
| 345 |
& xG(i,j,bi,bj) .ge. x_in(nx_in+1) .or. |
tmpVar = nyIn + 1. _d -3 |
| 346 |
& yG(i,j,bi,bj) .lt. y_in(0) .or. |
nLoop = 1 + INT( LOG(tmpVar)/LOG(2. _d 0) ) |
| 347 |
& yG(i,j,bi,bj) .ge. y_in(ny_in+1) ) then |
DO l=1,nLoop |
| 348 |
print*,'ERROR in S/R EXF_INTERP:' |
DO j=1,sNy |
| 349 |
print*,' input grid must encompass output grid.' |
DO i=1,sNx |
| 350 |
print*,'i,j,bi,bj' ,i,j,bi,bj |
IF ( w_ind(i,j).GT.s_ind(i,j)+1 ) THEN |
| 351 |
print*,'xG,yG' ,xG(i,j,bi,bj),yG(i,j,bi,bj) |
k = NINT( (s_ind(i,j)+w_ind(i,j))*0.5 ) |
| 352 |
print*,'nx_in,ny_in' ,nx_in ,ny_in |
IF ( yG(i,j,bi,bj) .LT. y_in(k) ) THEN |
| 353 |
print*,'x_in(0,nx_in+1)',x_in(0) ,x_in(nx_in+1) |
w_ind(i,j) = k |
| 354 |
print*,'y_in(0,ny_in+1)',y_in(0) ,y_in(ny_in+1) |
ELSE |
| 355 |
STOP ' ABNORMAL END: S/R EXF_INTERP' |
s_ind(i,j) = k |
| 356 |
endif |
ENDIF |
| 357 |
enddo |
ENDIF |
| 358 |
enddo |
ENDDO |
| 359 |
endif |
ENDDO |
| 360 |
|
ENDDO |
| 361 |
|
#ifdef ALLOW_DEBUG |
| 362 |
|
IF ( debugFlag ) THEN |
| 363 |
|
C- Check that we found the right lat. index |
| 364 |
|
DO j=1,sNy |
| 365 |
|
DO i=1,sNx |
| 366 |
|
IF ( w_ind(i,j).NE.s_ind(i,j)+1 ) THEN |
| 367 |
|
l = ILNBLNK(inFile) |
| 368 |
|
WRITE(msgBuf,'(3A,I4,A,I4)') |
| 369 |
|
& 'EXF_INTERP: file="', inFile(1:l), '", rec=', irecord, |
| 370 |
|
& ', nLoop=', nLoop |
| 371 |
|
CALL PRINT_ERROR( msgBuf, myThid ) |
| 372 |
|
WRITE(msgBuf,'(A)') |
| 373 |
|
& 'EXF_INTERP: did not found Latitude index for grid-pt:' |
| 374 |
|
CALL PRINT_ERROR( msgBuf, myThid ) |
| 375 |
|
WRITE(msgBuf,'(A,2I8,2I6,A,1PE16.8)') |
| 376 |
|
& 'EXF_INTERP: i,j,bi,bj=',i,j,bi,bj,' , yG=',yG(i,j,bi,bj) |
| 377 |
|
CALL PRINT_ERROR( msgBuf, myThid ) |
| 378 |
|
WRITE(msgBuf,'(A,I8,A,1PE16.8)') |
| 379 |
|
& 'EXF_INTERP: s_ind=',s_ind(i,j),', lat=',y_in(s_ind(i,j)) |
| 380 |
|
CALL PRINT_ERROR( msgBuf, myThid ) |
| 381 |
|
WRITE(msgBuf,'(A,I8,A,1PE16.8)') |
| 382 |
|
& 'EXF_INTERP: n_ind=',w_ind(i,j),', lat=',y_in(w_ind(i,j)) |
| 383 |
|
CALL PRINT_ERROR( msgBuf, myThid ) |
| 384 |
|
STOP 'ABNORMAL END: S/R EXF_INTERP' |
| 385 |
|
ENDIF |
| 386 |
|
ENDDO |
| 387 |
|
ENDDO |
| 388 |
|
ENDIF |
| 389 |
#endif /* ALLOW_DEBUG */ |
#endif /* ALLOW_DEBUG */ |
| 390 |
|
C-- longitude index |
| 391 |
|
DO j=1,sNy |
| 392 |
|
DO i=1,sNx |
| 393 |
|
w_ind(i,j) = INT((xG(i,j,bi,bj)-x_in(-1))/lon_inc) - 1 |
| 394 |
|
ENDDO |
| 395 |
|
ENDDO |
| 396 |
|
|
| 397 |
|
C-- Do interpolation using lon & lat index mapping |
| 398 |
|
CALL EXF_INTERPOLATE( |
| 399 |
|
I inFile, irecord, method, |
| 400 |
|
I nxIn, nyIn, x_in, y_in, |
| 401 |
|
O arrayin, |
| 402 |
|
O arrayout, |
| 403 |
|
I xG, yG, |
| 404 |
|
I w_ind, s_ind, |
| 405 |
|
I bi, bj, myThid ) |
| 406 |
|
|
| 407 |
C compute interpolation indices |
ENDDO |
| 408 |
do i=1,snx |
ENDDO |
|
do j=1,sny |
|
|
if (xG(i,j,bi,bj)-x_in(1) .ge. 0.) then |
|
|
w_ind(i,j) = int((xG(i,j,bi,bj)-x_in(1))/lon_inc) + 1 |
|
|
else |
|
|
w_ind(i,j) = int((xG(i,j,bi,bj)-x_in(1))/lon_inc) |
|
|
endif |
|
|
e_ind(i,j) = w_ind(i,j) + 1 |
|
|
js = ny_in*.5 |
|
|
do while (yG(i,j,bi,bj) .lt. y_in(js)) |
|
|
js = (js - 1)*.5 |
|
|
enddo |
|
|
do while (yG(i,j,bi,bj) .ge. y_in(js+1)) |
|
|
js = js + 1 |
|
|
enddo |
|
|
s_ind(i,j) = js |
|
|
n_ind(i,j) = js + 1 |
|
|
enddo |
|
|
enddo |
|
|
|
|
|
if (method .eq. 1) then |
|
|
|
|
|
C bilinear interpolation |
|
|
sp = 2 |
|
|
do j=1,sny |
|
|
do i=1,snx |
|
|
arrayout(i,j,bi,bj) = 0. |
|
|
do l=0,1 |
|
|
px_ind(l+1) = x_in(w_ind(i,j)+l) |
|
|
py_ind(l+1) = y_in(s_ind(i,j)+l) |
|
|
enddo |
|
|
do k=1,2 |
|
|
ew_val(k) = arrayin(w_ind(i,j),s_ind(i,j)+k-1) |
|
|
& *lagran(1,xG(i,j,bi,bj),px_ind,sp) |
|
|
& +arrayin(e_ind(i,j),s_ind(i,j)+k-1) |
|
|
& *lagran(2,xG(i,j,bi,bj),px_ind,sp) |
|
|
arrayout(i,j,bi,bj)=arrayout(i,j,bi,bj) |
|
|
& +ew_val(k)*lagran(k,yG(i,j,bi,bj),py_ind,sp) |
|
|
enddo |
|
|
enddo |
|
|
enddo |
|
|
elseif (method .eq. 2) then |
|
|
|
|
|
C bicubic interpolation |
|
|
sp = 4 |
|
|
do j=1,sny |
|
|
do i=1,snx |
|
|
arrayout(i,j,bi,bj) = 0. |
|
|
do l=-1,2 |
|
|
px_ind(l+2) = x_in(w_ind(i,j)+l) |
|
|
py_ind(l+2) = y_in(s_ind(i,j)+l) |
|
|
enddo |
|
|
do k=1,4 |
|
|
ew_val(k) = |
|
|
& arrayin(w_ind(i,j)-1,s_ind(i,j)+k-2) |
|
|
& *lagran(1,xG(i,j,bi,bj),px_ind,sp) |
|
|
& +arrayin(w_ind(i,j) ,s_ind(i,j)+k-2) |
|
|
& *lagran(2,xG(i,j,bi,bj),px_ind,sp) |
|
|
& +arrayin(e_ind(i,j) ,s_ind(i,j)+k-2) |
|
|
& *lagran(3,xG(i,j,bi,bj),px_ind,sp) |
|
|
& +arrayin(e_ind(i,j)+1,s_ind(i,j)+k-2) |
|
|
& *lagran(4,xG(i,j,bi,bj),px_ind,sp) |
|
|
arrayout(i,j,bi,bj)=arrayout(i,j,bi,bj) |
|
|
& +ew_val(k)*lagran(k,yG(i,j,bi,bj),py_ind,sp) |
|
|
enddo |
|
|
enddo |
|
|
enddo |
|
|
else |
|
|
stop 'stop in exf_interp.F: interpolation method not supported' |
|
|
endif |
|
|
enddo |
|
|
enddo |
|
| 409 |
|
|
| 410 |
|
RETURN |
| 411 |
END |
END |
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