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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 |
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC |
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C Flux Coupler using C |
C Flux Coupler using C |
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C Bilinear interpolation of forcing fields C |
C Bilinear interpolation of forcing fields C |
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C C |
C C |
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CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC |
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC |
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real*8 function lagran(i,x,a,sp) |
_RL FUNCTION LAGRAN(i,x,a,sp) |
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INTEGER i,k,sp |
INTEGER i |
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_RS x |
_RS x |
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real*8 a(4) |
_RL a(4) |
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real*8 numer,denom |
INTEGER sp |
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numer = 1.D0 |
C- local variables: |
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denom = 1.D0 |
INTEGER k |
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_RL numer,denom |
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numer = 1. _d 0 |
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denom = 1. _d 0 |
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do k=1,sp |
do k=1,sp |
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if ( k .ne. i) then |
if ( k .ne. i) then |
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denom = denom*(a(i) - a(k)) |
denom = denom*(a(i) - a(k)) |
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numer = numer*(x - a(k)) |
numer = numer*(x - a(k)) |
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endif |
endif |
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enddo |
enddo |
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lagran = numer/denom |
lagran = numer/denom |
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return |
RETURN |
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end |
END |
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SUBROUTINE exf_interp( |
SUBROUTINE exf_interp( |
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I infile, |
I infile, |
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I filePrec, |
I filePrec, |
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O arrayout, |
O arrayout, |
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I irecord, xG, yG, |
I irecord, xG_in, yG, |
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I lon_0, lon_inc, |
I lon_0, lon_inc, |
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I lat_0, lat_inc, |
I lat_0, lat_inc, |
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I nx_in, ny_in, method, mythid) |
I nx_in, ny_in, method, mythid) |
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implicit none |
implicit none |
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C infile = name of the input file (direct access binary) |
C infile (string) :: name of the binary input file (direct access) |
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C filePrec = file precicision (currently not used, assumes real*4) |
C filePrec (integer) :: number of bits per word in file (32 or 64) |
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C arrout = output arrays (different for each processor) |
C arrout ( _RL ) :: output array |
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C irecord = record number in global file |
C irecord (integer) :: record number to read |
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C xG,yG = coordinates for output grid |
C xG,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 |
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 |
C lon_inc :: scalar x-grid increment |
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C lat_inc = vector y-grid increments |
C lat_inc :: vector y-grid increments |
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C nx_in, ny_in = input x-grid and y-grid size |
C nx_in,ny_in (integer) :: size in x & y direction of input file to read |
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C method = 1 for bilinear 2 for bicubic |
C method :: 1,11,21 for bilinear; 2,12,22 for bicubic |
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C mythid = thread id |
C :: 1,2 for tracer; 11,12 for U; 21,22 for V |
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C myThid (integer) :: My Thread Id number |
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C |
C |
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#include "SIZE.h" |
#include "SIZE.h" |
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character*(*) infile |
character*(*) infile |
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integer filePrec, irecord, nx_in, ny_in |
integer filePrec, irecord, nx_in, ny_in |
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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_in (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) |
_RL lat_0, lat_inc(ny_in-1) |
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integer method, mythid |
integer method, mythid |
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C functions |
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external lagran |
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_RL lagran |
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C local variables |
C local variables |
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real*8 ne_fac,nw_fac,se_fac,sw_fac |
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integer e_ind(snx,sny),w_ind(snx,sny) |
integer e_ind(snx,sny),w_ind(snx,sny) |
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integer n_ind(snx,sny),s_ind(snx,sny) |
integer n_ind(snx,sny),s_ind(snx,sny) |
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real*8 px_ind(4), py_ind(4), ew_val(4) |
_RL px_ind(4), py_ind(4), ew_val(4) |
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external lagran |
_RL arrayin(-1:nx_in+2 , -1:ny_in+2) |
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real*8 lagran |
_RL NorthValue |
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real*4 arrayin(-1:nx_in+2 , -1:ny_in+2) |
_RL x_in (-1:nx_in+2), y_in(-1:ny_in+2) |
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real*8 x_in (-1:nx_in+2), y_in(-1:ny_in+2) |
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integer i, j, k, l, js, bi, bj, sp, interp_unit |
integer i, j, k, l, js, bi, bj, sp, interp_unit |
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_RS xg(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
_RS xG(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL ninety |
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PARAMETER ( ninety = 90. ) |
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_RS threeSixtyRS |
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PARAMETER ( threeSixtyRS = 360. ) |
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! nomalize xg |
C put xG in interval [ lon_0 , lon_0+360 [ |
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do bj=myByLo(myThid),myByHi(myThid) |
do bj=myByLo(myThid),myByHi(myThid) |
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do bi=myBxLo(myThid),myBxHi(myThid) |
do bi=myBxLo(myThid),myBxHi(myThid) |
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do j=1-OLy,sNy+OLy |
do j=1-OLy,sNy+OLy |
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do i=1-OLx,sNx+OLx |
do i=1-OLx,sNx+OLx |
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xg(i,j,bi,bj) = xg_in(i,j,bi,bj) |
xG(i,j,bi,bj) = xG_in(i,j,bi,bj)-lon_0 |
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xg(i,j,bi,bj) = mod(xg(i,j,bi,bj),360.) |
& + threeSixtyRS*2. |
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if ( xg(i,j,bi,bj) .lt. 0. ) |
xG(i,j,bi,bj) = lon_0+mod(xG(i,j,bi,bj),threeSixtyRS) |
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& xg(i,j,bi,bj) = 360.+xg(i,j,bi,bj) |
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enddo |
enddo |
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enddo |
enddo |
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enddo |
enddo |
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enddo |
enddo |
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call exf_interp_read( |
call exf_interp_read( |
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I infile, |
I infile, filePrec, |
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I filePrec, |
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O arrayin, |
O arrayin, |
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I irecord, xG, yG, |
I irecord, nx_in, ny_in, mythid) |
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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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_BARRIER |
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C _BEGIN_MASTER( myThid ) |
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C setup input grid |
C setup input longitude grid |
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do i=-1,nx_in+2 |
do i=-1,nx_in+2 |
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x_in(i) = lon_0 + (i-1.)*lon_inc |
x_in(i) = lon_0 + (i-1)*lon_inc |
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x_in(i) = mod(x_in(i),360.) |
enddo |
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if ( x_in(i) .lt. 0. ) |
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& x_in(i) = 360.+x_in(i) |
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enddo |
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y_in(0) = lat_0 - lat_inc(1) |
C setup input latitude grid |
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y_in(-1)= lat_0 - 2.*lat_inc(1) |
y_in(0) = lat_0 - lat_inc(1) |
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y_in(1) = lat_0 |
y_in(-1)= lat_0 - 2.*lat_inc(1) |
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do j=2,ny_in |
y_in(1) = lat_0 |
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y_in(j) = y_in(j-1) + lat_inc(j-1) |
do j=2,ny_in |
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enddo |
y_in(j) = y_in(j-1) + lat_inc(j-1) |
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y_in(ny_in+1) = y_in(ny_in) + lat_inc(ny_in-1) |
enddo |
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y_in(ny_in+2) = y_in(ny_in) + 2.*lat_inc(ny_in-1) |
do j=ny_in+1,ny_in+2 |
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if (y_in(j-1).eq.ninety) then |
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y_in(j) = 2 * ninety - y_in(j-2) |
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else |
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y_in(j) = min( y_in(j-1)+lat_inc(ny_in-1), ninety ) |
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endif |
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enddo |
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C enlarge boundary |
C enlarge boundary |
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do j=1,ny_in |
do j=1,ny_in |
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arrayin(0,j) = arrayin(nx_in,j) |
arrayin(0,j) = arrayin(nx_in,j) |
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arrayin(-1,j) = arrayin(nx_in-1,j) |
arrayin(-1,j) = arrayin(nx_in-1,j) |
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arrayin(nx_in+1,j) = arrayin(1,j) |
arrayin(nx_in+1,j) = arrayin(1,j) |
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arrayin(nx_in+2,j) = arrayin(2,j) |
arrayin(nx_in+2,j) = arrayin(2,j) |
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enddo |
enddo |
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do i=-1,nx_in+2 |
do i=-1,nx_in+2 |
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arrayin(i,0) = arrayin(i,1) |
arrayin(i,0) = arrayin(i,1) |
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arrayin(i,-1) = arrayin(i,1) |
arrayin(i,-1) = arrayin(i,1) |
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arrayin(i,ny_in+1) = arrayin(i,ny_in) |
arrayin(i,ny_in+1) = arrayin(i,ny_in) |
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arrayin(i,ny_in+2) = arrayin(i,ny_in) |
arrayin(i,ny_in+2) = arrayin(i,ny_in) |
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enddo |
enddo |
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C _END_MASTER( myThid ) |
C For tracer (method=1,2) set to northernmost zonal-mean value |
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C at 90N to avoid sharp zonal gradients near the Pole. |
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C For U (method=11,12) set to zero at 90N to minimize velocity |
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C gradient at North Pole |
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C For V (method=11,12) set to northernmost zonal value at 90N, |
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C as is already done above in order to allow cross-PoleArctic flow |
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do j=ny_in,ny_in+2 |
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if (y_in(j).eq.ninety) then |
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if (method.eq.1 .or. method.eq.2) then |
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NorthValue = 0. |
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do i=1,nx_in |
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NorthValue = NorthValue + arrayin(i,j) |
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enddo |
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NorthValue = NorthValue / nx_in |
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do i=-1,nx_in+2 |
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arrayin(i,j) = NorthValue |
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enddo |
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elseif (method.eq.11 .or. method.eq.12) then |
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do i=-1,nx_in+2 |
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arrayin(i,j) = 0. |
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enddo |
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endif |
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endif |
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enddo |
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do bj = mybylo(mythid), mybyhi(mythid) |
do bj = mybylo(mythid), mybyhi(mythid) |
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do bi = mybxlo(mythid), mybxhi(mythid) |
do bi = mybxlo(mythid), mybxhi(mythid) |
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endif |
endif |
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#endif /* ALLOW_DEBUG */ |
#endif /* ALLOW_DEBUG */ |
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C compute interpolation indices |
C compute interpolation indices |
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do i=1,snx |
do i=1,snx |
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do j=1,sny |
do j=1,sny |
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if (xG(i,j,bi,bj)-x_in(1) .ge. 0.) then |
if (xG(i,j,bi,bj)-x_in(1) .ge. 0.) then |
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enddo |
enddo |
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enddo |
enddo |
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if (method .eq. 1) then |
if (method.eq.1 .or. method.eq.11 .or. method.eq.21) then |
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C bilinear interpolation |
C bilinear interpolation |
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sp = 2 |
sp = 2 |
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enddo |
enddo |
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enddo |
enddo |
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enddo |
enddo |
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elseif (method .eq. 2) then |
elseif (method .eq. 2 .or. method.eq.12 .or. method.eq.22) then |
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C bicubic interpolation |
C bicubic interpolation |
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sp = 4 |
sp = 4 |
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& +arrayin(w_ind(i,j) ,s_ind(i,j)+k-2) |
& +arrayin(w_ind(i,j) ,s_ind(i,j)+k-2) |
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& *lagran(2,xG(i,j,bi,bj),px_ind,sp) |
& *lagran(2,xG(i,j,bi,bj),px_ind,sp) |
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& +arrayin(e_ind(i,j) ,s_ind(i,j)+k-2) |
& +arrayin(e_ind(i,j) ,s_ind(i,j)+k-2) |
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& *lagran(3,xG(i,j,bi,bj),px_ind,sp) |
& *lagran(3,xG(i,j,bi,bj),px_ind,sp) |
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& +arrayin(e_ind(i,j)+1,s_ind(i,j)+k-2) |
& +arrayin(e_ind(i,j)+1,s_ind(i,j)+k-2) |
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& *lagran(4,xG(i,j,bi,bj),px_ind,sp) |
& *lagran(4,xG(i,j,bi,bj),px_ind,sp) |
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arrayout(i,j,bi,bj)=arrayout(i,j,bi,bj) |
arrayout(i,j,bi,bj)=arrayout(i,j,bi,bj) |
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& +ew_val(k)*lagran(k,yG(i,j,bi,bj),py_ind,sp) |
& +ew_val(k)*lagran(k,yG(i,j,bi,bj),py_ind,sp) |
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enddo |
enddo |
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enddo |
enddo |
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enddo |
enddo |
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enddo |
enddo |
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RETURN |
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END |
END |