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C $Header: /usr/local/gcmpack/MITgcm/pkg/exf/exf_set_uv.F,v 1.2 2004/03/15 17:15:38 dimitri Exp $ |
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C $Name: $ |
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|
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#include "PACKAGES_CONFIG.h" |
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#include "EXF_OPTIONS.h" |
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|
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#ifdef USE_EXF_INTERPOLATION |
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|
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subroutine exf_set_uv( |
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& uvecfile, uvecstartdate, uvecperiod, |
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& exf_inscal_uvec, uvec, uvec0, uvec1, uvecmask, |
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& uvec_lon0, uvec_lon_inc, uvec_lat0, uvec_lat_inc, |
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& uvec_nlon, uvec_nlat, |
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& vvecfile, vvecstartdate, vvecperiod, |
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& exf_inscal_vvec, vvec, vvec0, vvec1, vvecmask, |
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& vvec_lon0, vvec_lon_inc, vvec_lat0, vvec_lat_inc, |
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& vvec_nlon, vvec_nlat, |
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& mycurrenttime, mycurrentiter, mythid ) |
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|
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c ================================================================== |
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c SUBROUTINE exf_set_uv |
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c ================================================================== |
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c |
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c o Read-in, interpolate, and rotate wind or wind stress vectors |
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c from a spherical-polar input grid to an arbitrary output grid. |
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c |
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c menemenlis@jpl.nasa.gov, 8-Dec-2003 |
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c |
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c ================================================================== |
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c SUBROUTINE exf_set_uv |
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c ================================================================== |
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|
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implicit none |
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|
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c == global variables == |
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|
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#include "EEPARAMS.h" |
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#include "SIZE.h" |
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#include "PARAMS.h" |
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#include "DYNVARS.h" |
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#include "GRID.h" |
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|
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#include "exf_param.h" |
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#include "exf_fields.h" |
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#include "exf_constants.h" |
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|
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#ifdef ALLOW_AUTODIFF |
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# include "ctrl.h" |
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# include "ctrl_dummy.h" |
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#endif |
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|
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c == routine arguments == |
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|
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c *vec_lon_0, :: longitude and latitude of SouthWest |
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c *vec_lat_0 corner of global input grid for *vec |
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c *vec_nlon, *vec_nlat :: input x-grid and y-grid size for *vec |
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c *vec_lon_inc :: scalar x-grid increment for *vec |
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c *vec_lat_inc :: vector y-grid increments for *vec |
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|
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character*(128) uvecfile |
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_RL uvecstartdate, uvecperiod |
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_RL exf_inscal_uvec |
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_RL uvec (1-olx:snx+olx,1-oly:sny+oly,nsx,nsy) |
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_RL uvec0 (1-olx:snx+olx,1-oly:sny+oly,nsx,nsy) |
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_RL uvec1 (1-olx:snx+olx,1-oly:sny+oly,nsx,nsy) |
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character*1 uvecmask |
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_RL uvec_lon0, uvec_lon_inc |
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_RL uvec_lat0, uvec_lat_inc(MAX_LAT_INC) |
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INTEGER uvec_nlon, uvec_nlat |
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character*(128) vvecfile |
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_RL vvecstartdate, vvecperiod |
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_RL exf_inscal_vvec |
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_RL vvec (1-olx:snx+olx,1-oly:sny+oly,nsx,nsy) |
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_RL vvec0 (1-olx:snx+olx,1-oly:sny+oly,nsx,nsy) |
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_RL vvec1 (1-olx:snx+olx,1-oly:sny+oly,nsx,nsy) |
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character*1 vvecmask |
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_RL vvec_lon0, vvec_lon_inc |
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_RL vvec_lat0, vvec_lat_inc(MAX_LAT_INC) |
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INTEGER vvec_nlon, vvec_nlat |
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_RL mycurrenttime |
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integer mycurrentiter |
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integer mythid |
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|
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c == local variables == |
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|
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logical first, changed |
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_RL fac, x1, x2, x3, x4, y1, y2, y3, y4, dx, dy |
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_RL tmp_u (1-olx:snx+olx,1-oly:sny+oly,nsx,nsy) |
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_RL tmp_v (1-olx:snx+olx,1-oly:sny+oly,nsx,nsy) |
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integer count0, count1 |
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integer i, j, bi, bj |
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integer interp_method |
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parameter(interp_method=2) |
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|
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c == end of interface == |
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|
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IF ( useCubedSphereExchange ) THEN |
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|
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if ( uvecfile .NE. ' ' .and. vvecfile .NE. ' ' ) then |
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|
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c some restrictions that can be relaxed later on |
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if ( uvecstartdate .ne. vvecstartdate .or. |
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& uvecperiod .ne. vvecperiod ) then |
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print*,'For useCubedSphereExchange, S/R exf_set_uv.F' |
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print*,'assumes that the u and v wind or wind stress' |
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print*,'files have the same startdate and period.' |
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stop |
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endif |
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|
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c get record numbers and interpolation factor |
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call exf_GetFFieldRec( |
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I uvecstartdate, uvecperiod |
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O , fac, first, changed |
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O , count0, count1 |
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I , mycurrenttime, mycurrentiter, mythid |
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& ) |
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|
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if ( first ) then |
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c scalar interpolation to (xC,yC) locations |
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call exf_interp( uvecfile, exf_iprec |
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& , tmp_u, count0, xC, yC |
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& , uvec_lon0,uvec_lon_inc |
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& , uvec_lat0,uvec_lat_inc |
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& , uvec_nlon,uvec_nlat,interp_method,mythid |
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& ) |
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call exf_interp( vvecfile, exf_iprec |
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& , tmp_v, count0, xC, yC |
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& , vvec_lon0,vvec_lon_inc |
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& , vvec_lat0,vvec_lat_inc |
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& , vvec_nlon,vvec_nlat,interp_method,mythid |
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& ) |
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c vector rotation |
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do bj = mybylo(mythid),mybyhi(mythid) |
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do bi = mybxlo(mythid),mybxhi(mythid) |
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do j = 1,sny |
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do i = 1,snx |
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x1=xG(i,j,bi,bj) |
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x2=xG(i+1,j,bi,bj) |
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x3=xG(i,j+1,bi,bj) |
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x4=xG(i+1,j+1,bi,bj) |
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if ((x2-x1).gt.180) x2=x2-360 |
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if ((x1-x2).gt.180) x2=x2+360 |
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if ((x3-x1).gt.180) x3=x3-360 |
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if ((x1-x3).gt.180) x3=x3+360 |
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if ((x4-x1).gt.180) x4=x4-360 |
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if ((x1-x4).gt.180) x4=x4+360 |
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y1=yG(i,j,bi,bj) |
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y2=yG(i+1,j,bi,bj) |
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y3=yG(i,j+1,bi,bj) |
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y4=yG(i+1,j+1,bi,bj) |
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dx=0.5*(x3+x4-x1-x2) |
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dx=dx*cos(deg2rad*yC(i,j,bi,bj)) |
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dy=0.5*(y3+y4-y1-y2) |
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vvec1(i,j,bi,bj)=(tmp_u(i,j,bi,bj)*dx+ |
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& tmp_v(i,j,bi,bj)*dy)/sqrt(dx*dx+dy*dy) |
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dx=0.5*(x2+x4-x1-x3) |
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dx=dx*cos(deg2rad*yC(i,j,bi,bj)) |
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dy=0.5*(y2+y4-y1-y3) |
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uvec1(i,j,bi,bj)=(tmp_u(i,j,bi,bj)*dx+ |
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& tmp_v(i,j,bi,bj)*dy)/sqrt(dx*dx+dy*dy) |
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enddo |
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enddo |
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enddo |
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enddo |
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c apply mask |
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if (exf_yftype .eq. 'RL') then |
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call exf_filter_rl( uvec1, uvecmask, mythid ) |
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call exf_filter_rl( vvec1, vvecmask, mythid ) |
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else |
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call exf_filter_rs( uvec1, uvecmask, mythid ) |
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call exf_filter_rs( vvec1, vvecmask, mythid ) |
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end if |
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endif |
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|
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if (( first ) .or. ( changed )) then |
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call exf_SwapFFields( uvec0, uvec1, mythid ) |
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call exf_SwapFFields( vvec0, vvec1, mythid ) |
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c scalar interpolation to (xC,yC) locations |
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call exf_interp( uvecfile, exf_iprec |
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& , tmp_u, count1, xC, yC |
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& , uvec_lon0,uvec_lon_inc |
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& , uvec_lat0,uvec_lat_inc |
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& , uvec_nlon,uvec_nlat,interp_method,mythid |
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& ) |
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call exf_interp( vvecfile, exf_iprec |
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& , tmp_v, count1, xC, yC |
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& , vvec_lon0,vvec_lon_inc |
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& , vvec_lat0,vvec_lat_inc |
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& , vvec_nlon,vvec_nlat,interp_method,mythid |
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& ) |
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c vector rotation |
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do bj = mybylo(mythid),mybyhi(mythid) |
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do bi = mybxlo(mythid),mybxhi(mythid) |
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do j = 1,sny |
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do i = 1,snx |
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x1=xG(i,j,bi,bj) |
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x2=xG(i+1,j,bi,bj) |
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x3=xG(i,j+1,bi,bj) |
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x4=xG(i+1,j+1,bi,bj) |
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if ((x2-x1).gt.180) x2=x2-360 |
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if ((x1-x2).gt.180) x2=x2+360 |
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if ((x3-x1).gt.180) x3=x3-360 |
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if ((x1-x3).gt.180) x3=x3+360 |
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if ((x4-x1).gt.180) x4=x4-360 |
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if ((x1-x4).gt.180) x4=x4+360 |
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y1=yG(i,j,bi,bj) |
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y2=yG(i+1,j,bi,bj) |
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y3=yG(i,j+1,bi,bj) |
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y4=yG(i+1,j+1,bi,bj) |
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dx=0.5*(x3+x4-x1-x2) |
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dx=dx*cos(deg2rad*yC(i,j,bi,bj)) |
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dy=0.5*(y3+y4-y1-y2) |
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vvec1(i,j,bi,bj)=(tmp_u(i,j,bi,bj)*dx+ |
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& tmp_v(i,j,bi,bj)*dy)/sqrt(dx*dx+dy*dy) |
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dx=0.5*(x2+x4-x1-x3) |
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dx=dx*cos(deg2rad*yC(i,j,bi,bj)) |
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dy=0.5*(y2+y4-y1-y3) |
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uvec1(i,j,bi,bj)=(tmp_u(i,j,bi,bj)*dx+ |
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& tmp_v(i,j,bi,bj)*dy)/sqrt(dx*dx+dy*dy) |
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enddo |
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enddo |
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enddo |
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enddo |
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c apply mask |
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if (exf_yftype .eq. 'RL') then |
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call exf_filter_rl( uvec1, uvecmask, mythid ) |
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call exf_filter_rl( vvec1, vvecmask, mythid ) |
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else |
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call exf_filter_rs( uvec1, uvecmask, mythid ) |
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call exf_filter_rs( vvec1, vvecmask, mythid ) |
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end if |
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endif |
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|
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c Interpolate linearly onto the current time. |
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do bj = mybylo(mythid),mybyhi(mythid) |
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do bi = mybxlo(mythid),mybxhi(mythid) |
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do j = 1,sny |
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do i = 1,snx |
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uvec(i,j,bi,bj) = exf_inscal_uvec * ( |
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& fac * uvec0(i,j,bi,bj) + |
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& (exf_one - fac) * uvec1(i,j,bi,bj) ) |
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vvec(i,j,bi,bj) = exf_inscal_vvec * ( |
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& fac * vvec0(i,j,bi,bj) + |
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& (exf_one - fac) * vvec1(i,j,bi,bj) ) |
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enddo |
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enddo |
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enddo |
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enddo |
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|
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endif |
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|
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ELSE |
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c IF ( .NOT. useCubedSphereExchange ) |
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|
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call exf_set_gen( |
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& uvecfile, uvecstartdate, uvecperiod, |
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& exf_inscal_uvec, |
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& uvec, uvec0, uvec1, uvecmask, |
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& uvec_lon0, uvec_lon_inc, uvec_lat0, uvec_lat_inc, |
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& uvec_nlon, uvec_nlat, xC, yC, |
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& mycurrenttime, mycurrentiter, mythid ) |
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call exf_set_gen( |
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& vvecfile, vvecstartdate, vvecperiod, |
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& exf_inscal_vvec, |
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& vvec, vvec0, vvec1, vvecmask, |
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& vvec_lon0, vvec_lon_inc, vvec_lat0, vvec_lat_inc, |
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& vvec_nlon, vvec_nlat, xC, yC, |
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& mycurrenttime, mycurrentiter, mythid ) |
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|
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ENDIF |
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|
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return |
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end |
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|
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#endif /* USE_EXF_INTERPOLATION */ |
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