The Drifting Buoy Data
Assembly Center has generated the data for you by tracking drifters
with satellites -- you will analyze these data to generate a map of the
The diagram below shows the movements of drifting buoys in the tropical Pacific Ocean during
March-April 2009. The linear segments of each trajectory represent a one week displacement.
Red paths show buoys with trailing drogues to 15-m depth; blue paths show undrogued buoys.
Notice the heads on the arrows showing
direction of movement.
You will need to examine the maps of the web pages in this expedition and generalize your observations
by drawing a few arrows on the maps in your handout, in order to show the direction of surface flow of the ocean in each region.
The heads of the arrows are a
little subtle in this figure, but improve on the subsequent pages.
Also note that the length of
the arrows signifies the distance traveled of the period of time in
question (November 2010) -- this represent the speed of the current carrying