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CARBON BUDGET OF UNITED STATES FORESTS
Q: What is the current carbon flux of forests
in the U.S.?
A: Our carbon flux estimates for coterminous
U.S. forests are:
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Average annual carbon flux
(million metric tons/year) for the period 1987-2000.
|
| Soils |
113 |
| Forest floor |
14 |
| Understory |
2 |
| Trees |
82 |
| Total |
211 |
Live flux includes understory and trees. Dead flux includes forest
floor and soil. A positive number indicates that the forest is sequestering
more carbon than it is emitting to the atmosphere.
SOURCE: Birdsey, R. A., and L. S. Heath. 1995.
Carbon changes in U.S. forests. IN: Joyce, L. A., ed. Productivity
of America's forests and climate change. U.S. Department of Agriculture,
Forest Service, General Technical Report RM-271, Rocky Mountain Forest
and Range Experiment Station. Ft. Collins, CO. 70 p.
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