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ptraj.h
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ptraj.h
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c====================== include file "ptraj.h" =========================
c
c inputs:
c
c nptraj = number of particle trajectories. particles are
c assumed to be of zero mass, neutrally buoyant and move
c with the local three dimensional flow during each time
c step.
c
c initially, particles are randomly distributed within
c the volume given by:
c
c ptslon = starting longitude for initial particle distribution
c ptelon = ending longitude for initial particle distribution
c ptslat = starting latitude for initial particle distribution
c ptelat = ending latitude for initial particle distribution
c ptsdpt = starting depth for initial particle distribution
c ptedpt = ending depth for initial particle distribution
c
c outputs:
c
c pxyz = particle coordinates. index (1,2,3) is for particle
c (longitude, latitude, depth).
c
c pijk = the particle is bounded by the volume with verticies
c given by the eight nearest surrounding model grid points
c on the "xu","yu", and "z" grids. index (1,2,3) locates
c the (longitude, latitude, depth) index of the deepest
c northeast corner of this bounding volume.
c
c em = matrix of deformation rates for calculation of
c lyapunov exponents
c
c ptdone = boolean for limiting multiple passes on trajectories
c within one time step
c
c initpt = boolean for initiailizing particle positions
c (t,f) = (initialize, do not initialize)
c
c author: r. c. pacanowski e-mail=> rcp@gfdl.gov
c
c
parameter (nptraj = 200)
integer pijk
logical ptdone, initpt
c
common /cptrji/ pijk(3,nptraj)
common /cptraj/ pxyz(3,nptraj)
common /cptraj/ ptslon, ptelon, ptslat, ptelat, ptsdpt, ptedpt
#ifdef lyapunov
common /cptraj/ em(2,2,nptraj)
#endif
common /cptra2/ ptdone(nptraj), initpt