Warming by methane?


  • Michael Carlowicz


While Wallace Broecker is focusing on cooling events and tropical temperatures, James Kennett, an oceanographer from the University of California, Santa Barbara, is examining rapid warming events in sediments from the Santa Barbara basin. Studying methane levels in fossilized plankton and benthos gathered on a recent leg of the Ocean Drilling Program, Kennett has found evidence that Pacific Ocean temperatures rose as much as 4–7°C in just a few decades during the last Ice Age.