Trends Online

Trends Online: A Compendium of Data on Global Change (February 1999)

Carbon Dioxide Information Analysis Center and World Data Center-A for

Atmospheric Trace Gases, Oak Ridge National Laboratory

The Trends series continues to be produced as an online document accessible from CDIAC's Web site. It will no longer be produced in hard copy.

Current contents include sections on (1) historical and modern records (from ice cores and and current monitoring stations) of atmospheric concentrations of CO2 (some records current through 1997), (2) estimates of global, regional, and national CO2 emissions from the combustion of fossil fuels, gas flaring, and the production of cement, and (3) long-term records of atmospheric temperature. The data summaries include tables; graphs; discussions of methods for collecting, measuring, and reporting the data; trends in the data; and references to literature providing further information.

In the future, Trends Online will include sections detailing information on global emissions estimates for CFC-11 and CFC-12, records of atmospheric methane concentrations, carbon content of the terrestrial biosphere, carbon fluxes to the atmosphere from land-use change, and long-term records of precipitation and cloudiness. In the meantime, links to such data are provided via the Trends Online Table of Contents.

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