New Study Proves Climate Change Happens At Low CO2 Levels
Posted by greg2213 on July 28, 2010
From C3 headlines, via Climate Depot:
Read here. One of the major stuck-on-stupid positions that global warming alarmists claim is that only human CO2 increases cause climate change. This idiotic stance eventually resulted in the bogus hockey-stick study that the world’s preeminent statisticians found to be so….well….really bogus. The hockey-stick of course purported to show that no climate changes had occurred over the last 1,000 years until the late 20th century. This idiocy became so apparent that even the IPCC retired the hockey-stick to barely a footnote in its last report.
In spite of the bogus hockey-stick, researchers across the world kept working to better understand past climate change. Another study just released has found that the arid central Asia (ACA) region has had significant climate change over the last 1,000 years during periods of low, unchanging CO2 levels.
I think the assumption that CO2 levels has remained unchanged over the last 1,000 years is likely incorrect, but measuring it over those longer periods is tough. Chemical measurements of CO2 levels have shown large variations in more recent times (since 1800) so it seems reasonable to assume such variations over longer periods.
Still, it’s another nail in the CAGW coffin.