Under-Reported “Old” Carbon is Not the Source of Increases in Atmospheric CO2

A recent paper published in the Journal Nature by Dean et al. provides an interesting and compelling argument that a significant source of atmospheric CO2 has been underestimated by carbon…

The Carbon Isotope Fingerprint Just Got Smudged – and I Owe Some of You an Apology

Carbon isotope ratios remain valuable tools, but they are no longer unimpeachable witnesses. They are part of a broader, far more uncertain picture of how carbon moves through the Earth…