Even so, different carbon pools have different ratios of 13C and 12C - called isotopic fingerprints.

Black carbon is important because it has a much longer residence time in soils-1,300 to 2,600 years-compared to more labile carbon pools, which range from 10-100 years.

This represents a considerable carbon investment in mycorrhizal network by the host plant and contribution to the below-ground organic carbon pool.

These estimates show that permafrost soils are an important carbon pool.

These estimates more than doubled the previously known carbon pools in permafrost soils.

The likelihood of the entire carbon pool mobilizing and entering the atmosphere is low despite the large volumes stored in the soil.

Although temperatures are projected to rise, it does not imply complete loss of permafrost and mobilization of the entire carbon pool.

This enzyme participates in one carbon pool by folate.

This enzyme participates in purine metabolism and one carbon pool by folate.

This large carbon pool represents more carbon than currently exists in all living things and twice as much carbon as exists in the atmosphere.