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Forest Carbon Management in the United States

1600–2100

^a USDA Forest Service, 11 Campus Boulevard, Suite 200, Newtown Square, PA 19073
^b School of Forest Resources and Environmental Science, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931-1295
^c National Council for Air and Stream Improvement, PO Box 13318, Research Triangle Park, NC 27709

View larger version (16K): [in a new window]   Fig. 1. Estimated net carbon emissions and sequestration calculated from changes in the sawtimber resource, 1650–1930 (Table 1). Estimated carbon changes in the forest ecosystem are based on changes in carbon stocks. Estimated carbon changes in wood products are based on quantity of sawed lumber. Net change is the sum of estimated carbon changes in the forest ecosystem and wood products. Estimation methods are described in the text.

View larger version (23K): [in a new window]   Fig. 2. Selected forest type changes in the southeastern United States, 1906–1997. Data from periodic compilations of forest inventory statistics as described in Birdsey and Lewis (2003).

View larger version (18K): [in a new window]   Fig. 3. Forest structure changes in an area of the Northern Rockies, 1850–2000 (adapted from Gallant et al., 2003).

View larger version (14K): [in a new window]   Fig. 4. Carbon sequestration on United States timberland and in wood products, 1953–2001. Excludes soil carbon, carbon on reserved forest land, and carbon on low productivity forest land. Estimates from Heath and Smith (2004), Heath and Skog (2004), and USDA (2004).

View larger version (12K): [in a new window]   Fig. 5. Carbon emissions in the United States from drain on the sawtimber stand, and sequestration from regrowth, 1630–2000. Projections from 2000–2100 show a continuation of current trends (solid line) and a possible alternate trend (dashed line) that reflects implementation of policies to increase carbon sequestration by the forest sector.

View larger version (11K): [in a new window]   Fig. 6. Disturbances affecting U.S. forests, 1990s. Estimates from Birdsey and Lewis (2003).

View larger version (25K): [in a new window]   Fig. 7. How carbon stocks change after disturbance (adapted from Pregitzer and Euskirchen, 2004).