New Paper Finds CO2 Spiked To Levels Higher Than The Present During Termination Of Last Ice Age
The Hockey Schtick
A new paper published in Quaternary Science Reviews reconstructs CO2 levels during the termination of the last ice age and finds CO2 spiked to levels near or even exceeding those of the present, obviously without any human influence. According to the authors, “The record clearly demonstrates that [CO2 levels were] significantly higher than usually reported for the Last [Glacial] Termination,” with levels of up to ~425 ppm about 12,750 years ago, which exceeds the present CO2 concentration of 395 ppm.
Left graph shows CO2 concentrations varied dynamically between ~220-425 ppm from 14,000-11,500 years ago. Ice core comparison is shown at right.
Related: From the paper by EG Beck showing chemical measurements of CO2 levels of up to ~480 ppm during the 1800′s