Phase 1 999-902 and Phase 2 700-602 of US Argo provided a total of 187 CTD profiling
floats in the Pacific, Atlantic and Indian Oceans. Objectives were to demonstrate
technological capabilities for fabrication and for deployment of float arrays in remote ocean
locations Phase 1 and to demonstrate the capability for manufacture and deployment of
large float arrays Phase 2. Recent technology developments in profiling floats were also
implemented, including new generation salinity sensors, improved depth capability, and …

Argo is a global array of 3,000 free-drifting profiling floats that measure the temperature and
salinity of the upper 2,000 meters of the ocean. This allows, for the first time, continuous
monitoring of the temperature, salinity, and velocity of the upper ocean, with all data being
relayed and made publicly available within hours after collection. The Argo array provides
unprecedented views of the evolving physical state of the ocean. It reveals the physical
processes that balance the large-scale heat and freshwater budgets of the ocean and …