From Drifting Buoy Data
We will analyze the drifter buoy data to
construct the map of the annual mean velocity of the surface currents
in the global ocean, one basin at a time, first in the Pacific Ocean.
The arrows on the map below represent annual
mean (average) velocities of the surface currents over several years
and do not include the important variations and complications shown
in the buoy trajectories (variance in statistics) due to ocean eddy
currents, which are irregular circular currents many 10's to 100's
kilometers in diameter.
On the map below, notice the
heads on the vectors (arrows) showing direction of flow.
The length of the vector is proportional to
the speed of the current
(see 25 cm/sec scale on arrow in North America - upper right side of
Annual Mean Velocity Estimates of Drifter Buoys
in Pacific Ocean from Drifter Data Buoy Center
Draw a representative number
of the vectors, from the map above,
on the map of the global ocean in your expedition worksheet
to show the motion of the surface waters in the Pacific Ocean
(maybe 7-8 in the
North Pacific, a similar number in the South Pacific and a few along the equator).
Compare this Diagram to Your Map in Section
3 of this expedition