Of course, one could read the whole article in order to understand what is being stated. But that would not fit the political agenda of the wingnutters here.
http://pubs.giss.nasa.gov/docs/notyet/submitted_Hansen_etal.pdf
Earth's Energy Imbalance and Implications
James Hansen, Makiko Sato, Pushker Kharecha
NASA Goddard Institute for Space Studies, New York, NY 10025, USA
Columbia University Earth Institute, New York, NY 10027, USA
Karina von Schuckmann
Centre National de la Recherche Scientifique, LOCEAN Paris, hosted by Ifremer, Brest, France
Abstract.
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/m2 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/m2, 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.
Humanity is potentially vulnerable to global temperature change, as discussed in the
Intergovernmental Panel on Climate Change (IPCC, 2001, 2007) reports and by innumerable
authors. Although climate change is driven by many climate forcing agents and the climate
system also exhibits unforced (chaotic) variability, it is now widely agreed that the strong global
warming trend of recent decades is caused predominantly by human-made changes of
atmospheric composition (IPCC, 2007).
The basic physics underlying this global warming, the greenhouse effect, is simple. An
increase of gases such as CO2 makes the atmosphere more opaque at infrared wavelengths. This
added opacity causes the planet's heat radiation to space to arise from higher, colder levels in the
atmosphere, thus reducing emission of heat energy to space. The temporary imbalance between
the energy absorbed from the sun and heat emission to space, causes the planet to warm until
planetary energy balance is restored.