thumbnail

The impact of agricultural soil erosion on the global carbon cycle

Science

By:
, , , , , , , , , , , , and
DOI: 10.1126/science.1145724

Links

Abstract

Agricultural soil erosion is thought to perturb the global carbon cycle, but estimates of its effect range from a source of 1 petagram per year -1 to a sink of the same magnitude. By using caesium-137 and carbon inventory measurements from a large-scale survey, we found consistent evidence for an erosion-induced sink of atmospheric carbon equivalent to approximately 26% of the carbon transported by erosion. Based on this relationship, we estimated a global carbon sink of 0.12 (range 0.06 to 0.27) petagrams of carbon per year-1 resulting from erosion in the world's agricultural landscapes. Our analysis directly challenges the view that agricultural erosion represents an important source or sink for atmospheric CO2.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
The impact of agricultural soil erosion on the global carbon cycle
Series title:
Science
DOI:
10.1126/science.1145724
Volume
318
Issue:
5850
Year Published:
2007
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
626
Last page:
629
Number of Pages:
4