Abstract

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 documented trace-gas records are for CO 2 and CH 4 . 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.

Keywords

Greenhouse gasEnvironmental scienceTrace gasClimate changeOrbital forcingGlacial periodClimatologyAtmospheric sciencesInterglacialCryosphereBiogeochemical cycleForcing (mathematics)Ice coreGreenhouse effectRadiative forcingGlobal warmingGeologySea iceOceanographyChemistryEnvironmental chemistry

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Publication Info

Year
1993
Type
article
Volume
259
Issue
5097
Pages
926-934
Citations
434
Access
Closed

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Dominique Raynaud, J. Jouzel, J. M. Barnola et al. (1993). The Ice Record of Greenhouse Gases. Science , 259 (5097) , 926-934. https://doi.org/10.1126/science.259.5097.926

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DOI
10.1126/science.259.5097.926