The following files were created
for Kassiem's presentation on the assimilation of Argo float data
into the POP model. In all cases, the Quicktime version is of higher
quality (and the Quicktime player
behaves better) than the AVI version, but they are a much larger
file. Right click to download the files (lest they attempt to open
within the browser)
North Atlantic Argo Float Tracks
This movie traces the routes of the
actual North Atlantic Argo floats from January 2001 until February 2003.
The floats are colour coded based on whether their initial position was
in the sub-tropical or sub-polar gyre. The division line for these
two gyres was estimated from a winter sea-surface temperature plot from
a North Atlantic POP run.
Argo Float Simulation using the POP
Model
This movie traces the trajectories of
'floats' dropped into the velocity field from a POP run (KASSIEM_OPEN3B)
at 2000 m depth. The velocity field evolves with time. The
initial position of the floats are the same as the initial positions of
the real Argo floats in the previous movie. The trajectory calculation
is not perfect and you may see some floats 'ground' themselves by
drifting into water less than 2000 m deep. Also, the floats can't
penetrate the zero-velocity model boundaries and may get stuck on a
'wall'.
Surface Drifter Simulation using the
POP Model
This movie is the identical set-up to
the previous movie, except that the surface velocity field has been used
rather than the 2000 m field. Thus, there is a bit more action.
Model Domain GIF
This is a GIF of the North Atlantic
showing the boundaries of Kassiem's 1/6th degree POP model domain.
domain.gif (48 KB)
Flow Field GIF
This is a (large) GIF from
a POP run (KASSIEM_OPEN40) showing the behavior of the flow field over
time by tracing the trajectories of a regular grid of surface drifters.
There was an error in the time stepping when creating the plot, however
the qualitative picture remains the same. The plot is quite large,
and, should you open it with your internet browser, it may auto-resize.
You can usually view it in its full glory by clicking once on the plot.
kassiem.gif (481 KB)
Matlab Routines
These are the Matlab scripts used to
generate all of the above movies. The script argo.m
parses the Argo float data files and creates the argo move. You'll need
to have the
matlab
netcdf toolbox installed.
The script
argo_pop.m extracts the velocity fields from a POP run (using the
routine pop_plot.m) and creates the pop_argo
and pop_surface movies.
Both scripts require the
MakeQTMovie.m routine to make the Quicktime
files.
