How variable are ocean temperatures?

How variable are ocean temperatures?
Potsdam, Germany (SPX) Nov 11, 2014 - The earth's climate appears to have been more variable over the past 7,000 years than often thought. This is the conclusion of a new study forthcoming online this week in the U.S. scientific journal "Proceedings of the National Academy of Sciences" (PNAS). In the study, scientists from the Potsdam-based Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, and Harvard U ... morehttp://www.terradaily.com/reports/How_variable_are_ocean_temperatures_999.html