Ocean Warming Underestimated

Studies published in Nature Climate Change indicate that the upper layer of oceans in the Southern Hemisphere have been warming faster than previously suggested.

Update (October 13):  Joe Romm argues that the 2 degree Celsius limit on atmospheric warming is now even more urgent.  "It's worse than we thought."

Update (October 20):  Dahl Jamail has an overview of stories about how climate change has been underestimated.

Update (June 1, 2015):  Big changes are coming to the oceans.