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Subject Areas
Carbon Cycle
Climate
Coastal Sensitivity to Sea Level Rise
Energy and Socioeconomic Systems
Land-Use and Ecosystems
Oceanic Trace Gases
Solar and Atmospheric Radiation
Trace Gas Emissions
Vegetation Response to CO2 and Climate
Fossil-Fuel CO2 Emissions
Atmospheric Trace Gas Measurements
Terrestrial Carbon Management
Estimated Annual Net Change in Soil Carbon per US County, 1990-2004These data represent the estimated net change (Megagram per year) in soil carbon due to changes in the crop type and tillage intensity. Estimated accumulation of soil carbon under Conservation Reserve Program (CRP)lands is included in these estimates. Negative values represent a net flux from the atmosphere to the soil; positive values represent a net flux from the soil to the atmosphere. As such, soil carbon sequestration is represented here as a negative value. The method of analysis is based on empirical relationshipsbetween land management and soil carbon. The method for modeling land management and estimating soil carbonchange, used to generate these data, is described in the following publication: West, T.O., C.C. Brandt, B.S. Wilson, C.M. Hellwinckel, D.D.Tyler, G. Marland, D.G. De La Torre Ugarte, J.A. Larson, and R.G. Nelson. 2008. Estimating Regional Changes in Soil Carbon withHigh Spatial Resolution. Soil Science Society of America Journal 72: 285-294. Tabular data are provided by county and by year in Excel andCSV formats. Spatial data are provided below in Excel, CSV, and zipped ArcGIS Shapefile formats (v.9.2) Shapefile.
Estimated Annual Net Change in Soil Carbon per US County, 1990-2008 (Version 2)
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