Appendix B. Model calibration data for boreal needleleaf deciduous forests/wetlands.

Model calibration data for boreal needleleaf deciduous forests/wetlands

Appendix D. Detailed description of regional variations in simulated terrestrial DOC loading, water yield, river discharge, and deepening of the active layer.

Detailed description of regional variations in simulated terrestrial DOC loading, water yield, river discharge, and deepening of the active layer

Appendix A. Modifications of the Terrestrial Ecosystem Model to better represent decomposition and soil moisture dynamics in Arctic ecosystems.

Modifications of the Terrestrial Ecosystem Model to better represent decomposition and soil moisture dynamics in Arctic ecosystems

Appendix C. Detailed evaluation of simulated terrestrial DOC loading and river discharge.

Detailed evaluation of simulated terrestrial DOC loading and river discharge

Appendix A. Estimates from the literature of net primary productivity in tropical forests.

Estimates from the literature of net primary productivity in tropical forests

Appendix A. Creating historical land use reconstructions for Mato Grosso, Brazil (1901–2006).

Creating historical land use reconstructions for Mato Grosso, Brazil (1901–2006)

Appendix B. Literature cited.

Literature cited

A Contemporary Carbon Balance for the Northeast Region of the United States

Development of regional policies to reduce net emissions of carbon dioxide (CO₂) would benefit from the quantification of the major components of the region’s carbon balancefossil fuel CO₂ emissions and net fluxes between land ecosystems and the atmosphere. Through spatially detailed inventories of fossil fuel CO₂ emissions and a terrestrial biogeochemistry model, we produce the first estimate of regional carbon balance for the Northeast United States between 2001 and 2005. Our analysis reveals that the region was a net carbon source of 259 Tg C/yr over this period. Carbon sequestration by land ecosystems across the region, mainly forests, compensated for about 6% of the region’s fossil fuel emissions. Actions that reduce fossil fuel CO₂ emissions are key to improving the region’s carbon balance. Careful management of forested lands will be required to protect their role as a net carbon sink and a provider of important ecosystem services such as water purification, erosion control, wildlife habitat and diversity, and scenic landscapes

Appendix A. A description of the terrestrial ecosystem model.

A description of the terrestrial ecosystem model