- Monday, 20 October 2014 00:00
By John Upton – Climate Central – October 5, 2014
The RV Kaharoa motored out of Wellington, New Zealand on Saturday, loaded with more than 100 scientific instruments, each eventually destined for a watery grave. Crewmembers will spend the next two months dropping the 50-pound devices, called Argo floats, into the seas between New Zealand and Mauritius, off the coast of Madagascar. There, the instruments will sink and drift, then measure temperature, salinity and pressure as they resurface to beam the data to a satellite. The battery-powered floats will repeat that process every 10 days — until they conk out, after four years or more, and become ocean junk. Under an international program begun in 2000, and that started producing useful global data in 2005, the world’s warming and acidifying seas have been invisibly filled with thousands of these bobbing instruments. They are gathering and transmitting data that’s providing scientists with the clearest-ever pictures of the hitherto-unfathomed extent of ocean warming. About 90 percent of global warming is ending up not on land, but in the oceans. For full story, click here.