HAS the greenhouse effect increased with man-made greenhouse gas emissions? Canadian Ken Gregory asks and answers this question concluding…
The greenhouse effect as characterized by the normalized greenhouse factor has increased by only 0.19% from 1960 to 2008. The temperature change from 1960 attributable to AGW is less than 0.1 C. The extrapolated temperature change attributable to AGW at doubled CO2 concentration is 0.26 C. The data shows that the IPCC estimate of climate sensitivity at doubled CO2 concentration of 3.0 C is unrealistic.
Read more here: http://www.friendsofscience.org/assets/documents/OLR&NGF_June2011.pdf
Jennifer Marohasy BSc PhD has worked in industry and government. She is currently researching a novel technique for long-range weather forecasting funded by the B. Macfie Family Foundation.