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A systematic variation with season and latitude in the concentration and isotopic abundance of atmospheric carbon dioxide has been found in the northern hemisphere. In Antarctica, however, a small but persistent increase in concentration has been found. Possible causes for these variations are discussed.
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Charles D. Keeling (Fri,) studied this question.
synapsesocial.com/papers/6a23a1aba9ac004fba9edcfb — DOI: https://doi.org/10.1111/j.2153-3490.1960.tb01300.x
Charles D. Keeling
Boston University
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