Data collected by scientists throughout the world are now telling us just how much carbon humans have put into the ocean and what that might mean for our future. Research published this week in the peer-reviewed journal Science analyzed more than 100,000 seawater samples worldwide collected from 1994 to 2007 and taken from nearly every corner and depth of ocean. The analysis found the oceans are absorbing about 31 percent of the carbon humans are spewing into the world, helping to significantly lower global temperatures. But that temperature buffering comes at a cost.