Chad M Hellwinckel Contact 865.341.1918 | hellwinckecm@ornl.gov All Publications 2023 Billion-Ton Report: An Assessment of U.S. Renewable Carbon Resources Cropland carbon fluxes in the United States: increasing Geospatial Resolution of Inventory-Based Carbon Accounting Energy Use and Carbon Dioxide Emissions from Cropland Production in the United States, 1990-2004... Estimating Regional Changes in Soil Carbon with High Spatial Resolution...