"A report in the December 3, 2010, issue of Science has reinforced what many scientists have suspected all along: variation in the Sun's output causes significant change in Earth's climate.....This new work indicates that even small variations in the Sun's output can have significant affect here on Earth. This is unsurprising, since the energy that drives Earth's climate comes from the Sun. Monsoon floods and decades long droughts are both part of the natural variation driven by our neighborhood star, but every climate fluctuation that causes human discomfort is blamed on anthropogenic global warming.....Their [Marchitto et al.] work is in agreement with the theoretical “ocean dynamical thermostat” response of ENSO to radiative forcing. Here is their description of the work: The influence of solar variability on Earth’s climate over centennial to millennial time scales is the subject of considerable debate. The change in total solar irradiance over recent 11-year sunspot cycles amounts to <0.1%, but greater changes at ultraviolet wavelengths may have substantial impacts on stratospheric ozone concentrations, thereby altering both stratospheric and tropospheric circulation patterns.....This model prediction is supported by paleoclimatic proxy reconstructions over the past millennium. In contrast, fully coupled general circulation models (GCMs) [IPCC climate models] lack a robust thermostat response because of an opposing tendency for the atmospheric circulation itself to strengthen under reduced radiative forcing." [Thomas M. Marchitto, Raimund Muscheler, Joseph D. Ortiz, Jose D. Carriquiry, Alexander van Geen 2010; Science 3 December 2010: Vol. 330 no. 6009 pp. 1378-1381]
Sun goes up, sun goes down... sun does this or that- NOT the issue.
The issue IS: when the heat/radiation arrives... it can not escape as fast as it has for millennia. There is LITTLE DOUBT that the "greenhouse effect" is largely caused by human activity... plus other cascading effects (permafrost, methane, deforestation, etc.).
The human specie WILL loose the kiddie-komik-book world-view it has held for a thousand years or more... the pyramid hierarchy... the "money" fantasy... the "majick book" delusion(s)... or it will simply join the fossil layers of other extinct species. To sift gnats about the "certainty" of science (which is never "certain") is a deadly trap.
The choice is fairly direct for most of us, and the data do not lie: a steady-state economy... or our children die.
On February 23rd the Washington Post issued a story by Darryl Fear that asserts that black carbon and methane are the causes of the Greenhouse gases?