Carbon Dioxide Information Analysis Center

The Carbon Dioxide Information Analysis Center (CDIAC) is the primary climate-change data and information analysis center of the U.S. Department of Energy (DOE). CDIAC is located at DOE's Oak Ridge National Laboratory (ORNL) and includes the World Data Center for Atmospheric Trace Gases. CDIAC's data holdings include estimates of carbon dioxide emissions from fossil-fuel consumption and land-use changes; records of atmospheric concentrations of carbon dioxide and other radiatively active trace gases; carbon cycle and terrestrial carbon management datasets and analyses; and global/regional climate data and time series. CDIAC provides scientific and data management support for projects sponsored by a number of agencies, including the AmeriFlux Network, continuous observations of ecosystem level exchanges of CO2, water, energy and momentum at different time scales for sites in the Americas; the Ocean CO2 Data Program of CO2 measurements taken aboard ocean research vessels; DOE-supported FACE experiments, which evaluate plant and ecosystem response to elevated CO2 concentrations; and the HIPPO project, which is analyzing the atmospheric carbon cycle and greenhouse gas concentrations from pole to pole over the Pacific Ocean. CDIAC is supported by DOE's Climate and Environmental Sciences Division within the Office of Biological and Environmental Research (BER).

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    • Estimates of Monthly CO2 Emissions from Fossil-Fuel Consumption in the U.S.A.
      janeiro 2004
      Fonte: Carbon Dioxide Information Analysis Center
      Carregamento por: Knoema
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      Estimates of Monthly CO2 Emissions from Fossil-Fuel Consumption in the U.S.A. The data from which these carbon-emissions estimates were derived are values of fuel consumed: in billions of cubic feet, for natural gas; in millions of barrels, for petroleum products; and in thousands of short tons, for coal. The resulting emissions estimates are expressed as teragrams of carbon. A teragram is 10^12 grams, or 10^6 metric tons. The fuel-consumption values were multiplied by their respective thermal conversion factors, which are in units of heat energy per unit of fuel (i.e., per cubic foot, barrel, or ton). In keeping with conventional usage in the United States, values are for the gross (higher) heating values of the respective fuels. The results are expressed in units of heat energy derived from the fuel. These energy values were then multiplied by their respective carbon dioxide emission factors, in units of the mass of carbon emitted per unit of energy liberated by the oxidation of the carbon in the fuel.
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    • Global and Regional Land-Use Change Emissions (Discontinued)
      agosto 2014
      Fonte: Carbon Dioxide Information Analysis Center
      Carregamento por: Raviraj Mahendran
      Acesso em 05 junho, 2020
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      NOTICE (March 2018): This website provides access to the CDIAC archive data temporarily. It will be gradually transitioned into data packages in the new ESS-DIVE archive. This site will continue to operate in parallel during and after the transition, and will be retired at a future date. If you have any questions regarding the data or the transition, please contact [email protected]. The carbon-cycle model simulates vegetation, litter, and soil carbonin 12 ecosystem and land-use classifications aggregated to 14 world regions. Land-use transitions are calculated annually on a 0.5 degree grid before aggregation to the regional level. Secondary forest re-growth is simulated in 50-year age classes for non-boreal forest (labeled as 1500_OtherForest, for forest that started regrowing in the period 1500-1549). Carbon stocks as land-use changes (e.g. conversion to cropland or reversion to native ecosystems) are explicitly tracked over time. Regional cropland areas, productivity, and harvest index change over time as estimated from historical data.