Another Large Jump in Ocean Warming

Ocean heat content data for the first 3 months of 2015 has been posted, and it again shows very large jumps upward:

Plotted as anomalies, it's clear the top half of the ocean, the 0-to-2000 meter region, is gaining heat at an accelerating rate:

with an acceleration of 1.4 ± 0.5 ZJ/yr² (2σ), or 0.08 ± 0.03 W/m² per year averaged over the globe.

(ZJ = zettajoule = 10²¹ J.) Using the quadratic fit, the present rate of change of this region's OHC is 17 ZJ/yr, which is 1.0 W/m².

A goodness-of-fit measure between the 2nd-order fit (i.e. with acceleration) and 1st-order fit (assuming no acceleration) continues to increase: