The gain in ocean heat content has been remarkably consistent over this period, closely paralleling the rise in global greenhouse gases (we must not forget the rapid rise in both Methane and N2O as well).
Not exact matches
If a significant fraction of this
heat lost from the
ocean went into the atmosphere one might have expected the surface air temperature to have increased faster during this period than during the subsequent period of the 1990s when the
ocean heat content gained > 5 X 10 ^ 22 J, but this is not what was observed (see reference Figure 2.7 c
in the IPCC TAR Working group I).
Given that it is all eventually going to come back to the issue of the gradual
gain we've been seeing
in ocean heat content over many decades, the most accurate thing we can say is that 2014's warmth is very consistent with the general accumulation of energy
in Earth's climate system caused by increasing GH gases and is well accounted for dynamically
in global climate models.
As for the variation
in heat content gain in each basin; this is no great surprise, as there is an exchange of water masses between the
ocean basins.
Several factors play a role when a hurricane
gains more power rapidly, including the temperature of the surface of the
ocean, humidity, characteristics of the clouds, the
heat content in the
ocean, and the direction of the wind at the surface compared to miles above.
To be fair, Rahmstorf is arguing against using
ocean heat content in the context of a «climate policy target», R Gates has suggested it
in the context of «
gains in Earth's climate system energy levels».
He agrees that the Increase
in ocean heat content shows that the earth has continued to
gain energy during the so called «pause» or «hiatus».
This argument would make sense only if variations
in ocean heat content alone rather than the sum of both the variation
in OHC and of latent
heat from ice melt were indicative of AGW (i.e. indicative of
heat gained from an externally forced TOA imbalance).
You later corrected: ``... energy
gained during a La Nina does not have time to escape during and after an El Nino before the next La Nina kicks
in and starts to recharge the
ocean heat content?»
Should be: ``... energy
gained during a La Nina does not have time to escape during and after an El Nino before the next La Nina kicks
in and starts to recharge the
ocean heat content?