While there still is quite a bit
of uncertainty surrounding the effects
of the PDO on Earth's climate, the U.K. Met Office says that «decadal variability in the Pacific
Ocean may have played a
substantial role in the recent pause in global surface temperature rise.»
Dr. Judith Curry: The uncertainties in
ocean heat content below 700 m are very
substantial, see http://judithcurry.com/2014/01/21/
ocean-heat-content-uncertainties/... The
role of internal
ocean behavior in climate change was almost completely neglected up the AR4; the AR5 takes it a bit more seriously.