By Jennifer Marohasy – Re-Blogged From http://jennifermarohasy.com
AFTER deconstructing 2,000-year old proxy-temperature series back to their most basic components, and then rebuilding them using the latest big data techniques, John Abbot and I show what global temperatures might have done in the absence of an industrial revolution. The results from this novel technique, just published in GeoResJ , accord with climate sensitivity estimates from experimental spectroscopy but are at odds with output from General Circulation Models.
According to mainstream climate science, most of the recent global warming is our fault – caused by human emissions of carbon dioxide. The rational for this is a speculative theory about the absorption and emission of infrared radiation by carbon dioxide that dates back to 1896. It’s not disputed that carbon dioxide absorbs infrared radiation, what is uncertain is the sensitivity of the climate to increasing atmospheric concentrations.