Radiocarbon, Volume 27 (1985)
ABOUT THIS COLLECTION
Radiocarbon is the main international journal of record for research articles and date lists relevant to 14C and other radioisotopes and techniques used in archaeological, geophysical, oceanographic, and related dating.
This archive provides access to Radiocarbon Volumes 1-54 (1959-2012).
As of 2016, Radiocarbon is published by Cambridge University Press. The journal is published quarterly. Radiocarbon also publishes conference proceedings and monographs on topics related to fields of interest. Visit Cambridge Online for new Radiocarbon content and to submit manuscripts.
ISSN: 0033-8222
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Radiocarbon, Volume 27, Number 2B (1985)American Journal of Science, 1985-01-01
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Radiocarbon, Volume 27, Number 2A (1985)American Journal of Science, 1985-01-01
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Radiocarbon, Volume 27, Number 1 (1985)American Journal of Science, 1985-01-01
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Radiocarbon, Volume 27, Number 3 (1985)American Journal of Science, 1985-01-01
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Twelfth International Radiocarbon ConferenceAmerican Journal of Science, 1985-01-01
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Notice to Readers and ContributorsAmerican Journal of Science, 1985-01-01
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Notice to Readers and ContributorsAmerican Journal of Science, 1985-01-01
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Notice to Readers and ContributorsAmerican Journal of Science, 1985-01-01
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Notice to Readers and ContributorsAmerican Journal of Science, 1985-01-01
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The Effect of Atmospheric 14C Variations on the 14C Levels in the Jordan River System13C and 14C were measured in the upper Jordan River, in its tributaries which issue from the Mount Hermon aquifer, and in the local atmospheric CO2 to evaluate the degree to which changes in the atmospheric 14C levels influence the 14C levels in the aquifer and in the Jordan River. The exchange fraction of CO2 between the river and the atmosphere was calculated for fall 1983 with the two carbon isotopes and it is shown that the value obtained with 14C (0.364) is the more reliable. The ratio of 14C in the Jordan River to that in the atmosphere in 1972 is similar to that in 1983, 0.66 and 0.67, respectively. This implies an approximately constant ratio (0.44) between the 14C level in the Mount Hermon aquifer baseflow and the 14C level in the atmospheric CO2. This information can be combined with the known historical fluctuations in the 14C levels of the atmosphere to calculate the 14C fluctuations in the discharge of the Jordan River into Lake Kinneret, backwards in time.
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LaboratoriesAmerican Journal of Science, 1985-01-01
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La Jolla Measurements of Radiocarbon in South German Oak Tree-Ring ChronologiesRadiocarbon measurements made by the La Jolla laboratory on tree-ring samples from South German oak chronologies are presented. Several previously separate treering series have been reduced to one absolutely dendro-dated chronology spanning the period from 4066 BC to the present and one still-floating chronology which spans the approximate period 7225 to 4125 BC. Previous estimates of the dendro-years made by the authors are compared with the dendro-years now assigned.