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Argo is a global array of 3,000 free-drifting profiling floats that measures the temperature and salinity of the upper 2000 m 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.NPR has the money quote from Josh Willis at NASA: (emphasis added)
Argo deployments began in 2000 and by November 2007 the array is 100% complete. Today's tally of floats is shown in the figure above.While the Argo array is currently complete at 3000 floats, to be maintained at that level, national commitments need to provide about 800 floats per year (which has occurred for the past three years).
Josh Willis at NASA's Jet Propulsion Laboratory says the oceans are what really matter when it comes to global warming.It might just be worth 20 million if it helps to calm down global warming hysteria. One good feature of the Argo system is that it is virtually tamper proof, unlike the land based system where temperature readings can be artificially inflated due to the urban heat island effect and bad placement of the monitoring stations. (ie: next to AC units) as has been reported.
In fact, 80 percent to 90 percent of global warming involves heating up ocean waters. They hold much more heat than the atmosphere can. So Willis has been studying the ocean with a fleet of robotic instruments called the Argo system. The buoys can dive 3,000 feet down and measure ocean temperature. Since the system was fully deployed in 2003, it has recorded no warming of the global oceans. "There has been a very slight cooling..."