[13-Oct-2009] Salinity plays a major role in how ocean waters circulate around the globe. Salinity changes can create ocean circulation changes that, in turn, may impact regional and global climates. The extent to which salinity impacts our global ocean circulation is still relatively unknown, but NASA's Aquarius mission is helping to advance that understanding by painting a global picture of our planet's salty waters. (00:04:45) Credit: NASA/Goddard Space Flight Center.Watch Movie »