Berkeley Earth Project Says Carbon Dioxide is Cause of Global
Warming I promised to link to Richard Muller's latest climate
change paper from the Berkeley BEST group when it was posted on
Monday, and it's now Monday. So here it is. Previous BEST papers
have confirmed dramatic global warming over the past century,
and the new paper is mostly an attempt to figure out what caused
the warming. The answer, unsurprisngly to most of us, is human
activity: Many of the changes in land-surface temperature follow
a simple linear combination of volcanic forcing (based on
estimates of stratospheric sulfate injection) and an
anthropogenic term represented here by the logarithm of the CO2
concentration....When we included solar forcing we found that
the solar variability record assumed by the IPCC did not
contribute significantly to the fit of historic temperature.
....After accounting for volcanic and anthropogenic effects, the
residual variability in land-surface temperature is observed to
closely mirror and for slower ch