Computer Science
Scientific paper
May 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.315..309r&link_type=abstract
Nature (ISSN 0028-0836), vol. 315, May 23, 1985, p. 309-311. Research supported by the European Economic Community and Expeditio
Computer Science
37
Antarctic Regions, Atmospheric Composition, Carbon Dioxide Concentration, Land Ice, Periodic Variations, Air Pollution, Climatology, Glaciology, Man Environment Interactions, Snow Cover
Scientific paper
Information is obtained concerning the variation of background CO2 concentrations over the centuries, through analysis of atmospheric air trapped in bubbles inside a 2-3-m-long ice core. The ice core was drilled in East Antarctica in 1980-1981, and the atmospheric air in the bubbles was analyzed using gas chromatography. It is found that the background CO2 level could have been as low as 260 p.p.m.v. (parts per million by volume) before the major anthropogenic effects of fossile fuel consumption became significant in the 19th century. It is suggested that the 'preindustrial' CO2 level was not constant over the few hundred years preceding the nineteenth century.
Barnola Jean-Marc
Raynaud Dominique
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