![Map of the Argo float positions on 4 May 2010 in worlds oceans.](http://static.sciencelearn.org.nz/images/images/000/000/758/full/OCE_NZR_ART_01_argo_float_map.jpg?1674164865)
The 3,255 Argo floats are well spread around the globe, collecting temperature and salinity data from the upper 2,000 m of the ocean.
These data were collected and made freely available by the International Argo Project and the national programmes that contribute to it.
www.argo.ucsd.edu, www.ocean-ops.org
Argo is a pilot programme of the Global Ocean Observing System.