4       SUBROUTINE gr_fi_dyn(nfield,ngrid,im,jm,pfi,pdyn)
 
   14       INTEGER im,jm,ngrid,nfield
 
   15       REAL pdyn(im,jm,nfield)
 
   16       REAL pfi(ngrid,nfield)
 
   27             pdyn(i,1,ifield)=pfi(1,ifield)
 
   28             pdyn(i,jm,ifield)=pfi(ngrid,ifield)
 
   34             CALL scopy(im-1,pfi(ig,ifield),1,pdyn(1,j,ifield),1)
 
   35                     pdyn(im,j,ifield)=pdyn(1,j,ifield)
 
subroutine scopy(n, sx, incx, sy, incy)
 
subroutine gr_fi_dyn(nfield, ngrid, im, jm, pfi, pdyn)