Posted 27 August 2013
"Upon reflection on these temperature and CO2 data of the last thousand years, I conclude that the evidence presented here will cause unhappiness for both extreme alarmists and extreme skeptics. Maybe that’s a good thing. However, it still leaves open the question of climate sensitivity (CS), i.e., the actual influence of CO2 on global temperature. CS has been steadily decreasing, from 3°C (for CO2 doubling) in the initial IPCC report. I believe confidently that the real CS values may be much lower—although not quite zero....The scientific puzzle is why IPCC climate models predict large values for CS while the observations show only small ones." Dr Fred Singer, writing for the Independent Instiotute in USA.
Read it here