For many, carbon isotopes and the 13C/12C ratio are the smoking gun of climate change. Fossil fuels are the only source of large amounts of 12C.
Saturday, December 4, 2010
Multiple Carbon Isotope Records
Carbon isotope records from multiple locations worldwide, dating to 1600. Natural sources of carbon increase the 13C/12C ratio. Burning of fossil fuels - organic fuels - puts 12C into the atmosphere, lowering the ratio: