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 records of the atmospheric concentrations of carbon dioxide and other radiatively active gases; the role of the terrestrial biosphere and the oceans in the biogeochemical cycles of greenhouse gases; emissions of carbon dioxide from fossil-fuel consumption and land-use changes; long-term climate trends; the effects of elevated carbon dioxide on vegetation; and the vulnerability of coastal areas to rising sea level.

CDIAC provides data management support for major projects, 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 NARSTO, which assesses ozone and fine particle processes in the troposphere over North America.

CDIAC is supported by DOE's Climate Change Research Division of the Office of Biological and Environmental Research.