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Concentration of atmospheric carbon dioxide at 500 and 700 millibars

1968; American Geophysical Union; Volume: 73; Issue: 14 Linguagem: Inglês

10.1029/jb073i014p04511

2156-2202

Charles D. Keeling, Thomas Harris, Eugene M. Wilkins,

Atmospheric chemistry and aerosols

Journal of Geophysical Research (1896-1977)Volume 73, Issue 14 p. 4511-4528 Concentration of atmospheric carbon dioxide at 500 and 700 millibars Charles D. Keeling, Charles D. KeelingSearch for more papers by this authorThomas B. Harris, Thomas B. HarrisSearch for more papers by this authorEugene M. Wilkins, Eugene M. WilkinsSearch for more papers by this author Charles D. Keeling, Charles D. KeelingSearch for more papers by this authorThomas B. Harris, Thomas B. HarrisSearch for more papers by this authorEugene M. Wilkins, Eugene M. WilkinsSearch for more papers by this author First published: 15 July 1968 https://doi.org/10.1029/JB073i014p04511Citations: 46AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract The distribution of atmospheric carbon dioxide over the North Pacific and Arctic oceans has been determined as a function of season from 1008 samples of air collected at the 500- and 700-mb pressure surfaces by Weather Reconnaissance flights of the U.S. Air Force over a period of 4 years beginning in 1958. The concentration (mixing ratio) of CO2 oscillates seasonally. The amplitude increases and the phase advances from south to north. Variations with altitude are slight. Typical monthly mean values referred to a 1960 datum are: south of 20°N, maximum of 316 ppm in June, minimum of 311 ppm in October; north of 70°N, maximum of 317 ppm in May, minimum of 308 ppm in August. Significant horizontal variations in CO2 concentration are observed on the scale of weather patterns during the summer, when photosynthesis by land plants produces an intense sink for CO2. During other seasons the concentration is uniform over great distances. References Bischof, W., Periodic variations of the atmospheric CO2 content in Scandinavia, Tellus, 12, 216– 226, 1960. Bischof, W., Variations in concentration of carbon dioxide in the free atmosphere, Tellus, 14, 87– 90, 1962. Bischof, W., Carbon dioxide concentration in the upper troposphere and lower stratosphere, 1, Tellus, 17, 398– 402, 1965. Bischof, W., B. 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Rend., 80, 976– 978, 1875. Citing Literature Volume73, Issue1415 July 1968Pages 4511-4528 ReferencesRelatedInformation