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Published online 23 June 2008
Published in J Environ Qual 37:1376-1382 (2008)
DOI: 10.2134/jeq2007.0290
© 2008 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Indicators of Carbon Storage in U.S. Ecosystems: Baseline for Terrestrial Carbon Accounting

Christine Negra*, Caroline Cremer Sweedo, Kent Cavender-Bares and Robin O'Malley

The H. John Heinz III Center for Science, Economics and the Environment, 900 17th Street NW, Suite 700, Washington, DC 20006


Figure 1
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  		Fig. 1. Carbon gained or lost, by ecosystem type, over time. Estimates for forests provided by USFS for above- and below-ground biomass (excluding soil). Estimates for croplands, grasslands, and shrublands provided by NREL for soil carbon (top eight inches) on private lands only. Coverage: lower 48 states.

 

Figure 2
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  		Fig. 2. Change in carbon density, by ecosystem type, over time. Estimates are based on data shown in Fig. 1 and areal extent of forests, croplands, and grasslands and shrublands. Note unit conversion: 1 metric ton = 1.10 U.S. short tons; 1 acre = 0.40 hectare.

 




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