Theory 12/Refinement
Residence Is Shorter
The claim
Soil carbon residence times are shorter than radiocarbon models imply because old carbon is a small recalcitrant fraction rather than a slow bulk pool.
01Mechanism
Bulk age reflects a mixture; the mean overstates the typical.
02Prediction
Turnover should be faster when measured per fraction.
03Refutation
Uniform turnover would remove the mixture.