New research from Stephen Schwartz of Brookhaven National Lab concludes that the Earth’s climate is only about one-third as sensitive to carbon dioxide as the IPCC assumes. Schwartz’s study is “in press” at the Journal of Geophysical Research and you can download a preprint of the study here: http://www.ecd.bnl.gov/steve/pubs/HeatCapacity.pdf
According to Schwartz’s results, which are based on the empirical relationship between trends in surface temperature and ocean heat content, doubling the CO2 concentration in the atmosphere would result in a 1.1oC increase in average temperature (0.1–2.1oC, two standard deviation uncertainty range). Schwartz’s result is 63% lower than the IPCC’s estimate of 3oC for a doubling of CO2 (2.0–4.5oC, 2SD range).
Right now we’re about 41% above the estimated pre-industrial CO2 level...[Weiterlesen…]