The ice record of greenhouse gases

Details The ice record of greenhouse gases The ice record of greenhouse gases

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993sci...259..926r&link_type=abstract

Science (ISSN 0036-8075), vol. 259, no. 5097, p. 926-934.

Computer Science

89

Atmospheric Composition, Climatology, Greenhouse Effect, Polar Caps, Trapping, Atmospheric Temperature, Biochemistry, Carbon Dioxide, Geochemistry, Methane

Scientific paper

Gases trapped in polar ice provide our most direct record of the changes in greenhouse gas levels during the past 150,000 years. The best conducted trace-gas records are for CO2 and CH4. The measurements corresponding to the industrial period document the recent changes in growth rate. The variability observed over the last 1000 years constrains the possible feedbacks of a climate change on the trace gases under similar conditions as exist today. Changes in the levels of greenhouse gases during the glacial-interglacial cycle overall paralleled, at least at high southern latitudes, changes in temperature; this relation suggests that greenhouse gases play an important role as an amplifier of the initial orbital forcing of Earth's climate and also helps to assess the feedbacks on the biogeochemical cycles in a climate system in which the components are changing at different rates.

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