Nature: Over the past decade, the North Atlantic Ocean has been absorbing less and less atmospheric carbon dioxide. Now scientists report that blame may lie with changes in the region’s dominant climate pattern, known as the North Atlantic Oscillation, rather than anthropogenic warming. The time series of carbon dioxide observations in the North Atlantic extends back only as far as 1995. To reconstruct the patterns of carbon dioxide uptake back through 1979, Helmuth Thomas at Dalhousie …