Improving observations of ocean heat content show that Earth is absorbing more energy from the sun than it is radiating to space as heat, even during the recent solar minimum. The inferred planetary energy imbalance, 0.59 ± 0.15 W m−2 during the 6-year period 2005–2010, confirms the dominant role of the human-made greenhouse effect in driving global climate change. Observed surface temperature change and ocean heat gain together constrain the net climate forcing and ocean mixing rates. We conclude that most climate models mix heat too efficiently into the deep ocean and as a result underestimate the negative forcing by human-made aerosols. Aerosol climate forcing today is inferred to be −1.6 ± 0.3 W m−2, implying substantial aerosol indirect climate forcing via cloud changes. Continued failure to quantify the specific origins of this large forcing is untenable, as knowledge of changing aerosol effects is needed to understand future climate change. We conclude that recent slowdown of ocean heat uptake was caused by a delayed rebound effect from Mount Pinatubo aerosols and a deep prolonged solar minimum. Observed sea level rise during the Argo float era is readily accounted for by ice melt and ocean thermal expansion, but the ascendency of ice melt leads us to anticipate acceleration of the rate of sea level rise this decade.
One doesn't need to go into the physics involved to see that this is bad science. It is in fact a particularly egregious example of a post hoc explanation -- being wise after the event in layman's terms. Such explanations get as little respect in science as elsewhere.
Such explanations are given when something predicted by theory fails to occur -- and when there is one clear confounding factor they can have some status. But Hansen's paper has no such status. He has to invoke a whole range of special influences, some of which seem to be entirely imaginary. Without any evidence for it he extends the influence of the Pinatubo eruption to two decades, which is wildly outside the normal expectation of a couple of years at most. The paper is a patent work of desperation.
On the amusing side, he admits an effect of solar variations, something long denied by Warmists, including himself.
Steve Goddard sinks the knife in too.