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Trends Online: A Compendium of Data on Global Change

http://cdiac.esd.ornl.gov/trends/trends.htm

Carbon Dioxide Information Analysis Center. 2003. Trends Online: A Compendium of Data on Global Change. Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tennessee.

This online document provides synopses of frequently used time series of global-change data:

• historical and modern records (from ice cores and current monitoring stations) of atmospheric concentrations of carbon dioxide (CO₂)
• atmospheric concentrations of methane
• isotopic measurements (¹⁴C et al.) for atmospheric greenhouse gases
• estimates of global, regional, and national CO₂ emissions from the combustion of fossil fuels, gas flaring, and the production of cement
• global emissions estimates for methane (CH₄)
• carbon flux from land-cover change
• long-term temperature records, whose spatial coverage ranges from individual sites to the entire globe and from the Earth's surface to the lower stratosphere
• total cloud amount over China
• ecosystems (area and carbon content)

Data records are presented in multipage formats, each dealing with a specific site, region, or emissions species. The data records include tables; graphs; discussions of methods for collecting, measuring, and reporting the data; trends in the data, and references to literature providing further information. Instructions for citing specific data in Trends Online are provided for each compiled data set. All data appearing in Trends Online are available, on request, on digital media from CDIAC at no cost.

Keywords: Atmospheric chemistry, atmospheric measurements, carbon cycle, carbon dioxide, carbon isotopes, climate, climate change, climatology, clouds, Earth atmosphere, emissions, fossil fuels, gas flaring, global warming, greenhouse effect, meteorology, methane, natural gas, radiosondes, paleoclimatology, regional analysis, temperature monitoring, trace gases

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