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Sunday, January 20, 2013

Koch-Funded Study Finds 2.5 °F Warming Of Land Since 1750 Is Manmade, ‘Solar Forcing Does Not Appear To Contribute’

by Joe Romm , Climate ProgressJanuary 20, 2013

The Berkeley Earth Surface Temperature Study (BEST) has finally published its findings on the cause of recent global warming. This Koch-funded reanalysis of millions of temperature observations from around the world, “A New Estimate of the Average Earth Surface Land Temperature Spanning 1753 to 2011,” concludes:
… solar forcing does not appear to contribute to the observed global warming of the past 250 years; the entire change can be modeled by a sum of volcanism and a single anthropogenic [human-made] proxy.
The decadal land surface temperature from BEST average (black line), “compared to a linear combination of volcanic sulfate emissions (responsible for the short dips) and the natural logarithm of CO2 (responsible for the gradual rise) shown in red. Inclusion of a proxy for solar activity did not significantly improve the fit. The grey area is the 95% confidence interval.”
You may recall that back in July, Richard Muller, BEST’s Founder and Scientific Director, published a NY Times op-ed, “The Conversion of a Climate-Change Skeptic,” which concluded
Three years ago I identified problems in previous climate studies that, in my mind, threw doubt on the very existence of global warming. Last year, following an intensive research effort involving a dozen scientists, I concluded that global warming was real and that the prior estimates of the rate of warming were correct. I’m now going a step further: Humans are almost entirely the cause.
What makes this “man bites dog” is that Muller has been a skeptic of climate science, and the single biggest funder of this study is the “Charles G. Koch Charitable Foundation ($150,000).” The Kochs are the leading funder of climate disinformation in the world!
Muller further explained:
Our results show that the average temperature of the earth’s land has risen by two and a half degrees Fahrenheit over the past 250 years, including an increase of one and a half degrees over the most recent 50 years. Moreover, it appears likely that essentially all of this increase results from the human emission of greenhouse gases.
These findings are stronger than those of the Intergovernmental Panel on Climate Change, the United Nations group that defines the scientific and diplomatic consensus on global warming.
In short, a Koch-funded study has found that the IPCC “consensus” underestimated both the rate of surface warming and how much could be attributed to human emissions!
The Koch-finded study also finds, “the rate of warming we observe is broadly consistent with the IPCC estimates of 2-4.5 °C warming (for land plus oceans) at doubled CO2.” A summary of BEST’s findings are on their website.

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