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Preliminary Report of the First Workshop of the Intcal04 Radiocarbon Calibration/Comparison Working Group
Paula J Reimer ,
Konrad A Hughen ,
Thomas P Guilderson ,
Gerry McCormac ,
Mike G L Baillie ,
Edouard Bard ,
Phillip Barratt ,
J Warren Beck ,
Caitlin E Buck ,
Paul E Damon ,
Michael Friedrich ,
Bernd Kromer ,
Christopher Bronk Ramsey ,
Ron W Reimer ,
Sabine Remmele ,
John R Southon ,
Minze Stuiver ,
Johannes VAN der Plicht
July 2016
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Abstract
The first meeting of the IntCal04 working group took place at Queen's University Belfast from April 15 to 17, 2002. The participants are listed as co-authors of this report. The meeting considered criteria for the acceptance of data into the next official calibration dataset, the importance of including reliable estimates of uncertainty in both the radiocarbon ages and the cal ages, and potential methods for combining datasets. This preliminary report summarizes the criteria that were discussed, but does not yet give specific recommendations for inclusion or exclusion of individual datasets.
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Most cited references5
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A high-precision calibration of the AD radiocarbon time scale
Minze Stuiver (1982)
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Calibration of the 14C time scale to >40 ka by 234U–230Th dating of Lake Lisan sediments (last glacial Dead Sea)
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New TIMS constraints on the uranium-238 and uranium-234 in seawaters from the main ocean basins and the Mediterranean Sea 1 1Throughout the paper we use the δ234U notation which represents the deviation of the measured 234U/238U atomic ratio from the 234U/238U atomic ratio at secular equilibrium: δ234U=1000×[(234U/238U)/(234U/238U)eq−1], where (234U/238U)eq is the ratio of the two decay constants: λ238=1.5513×10−10 year−1 (Jaffey et al., 1971) and λ234=2.826×10−6 year−1 recently revised by Cheng et al. (2000). Therefore, an activity ratio of 1 equals (234U/238U)eq=λ238/λ234=54.89×10−6 in atomic ratio. This latter value is ∼3‰ different than the one previously used and thus data from the literature have been recalculated accordingly. All U concentrations are expressed in pmol/g (to be multiplied by 0.2380274 for comparison with some previous works which used ng/g; e.g. Chen et al., 1986).
Doriane Delanghe, Edouard Bard, Bruno Hamelin (2002)