Absolute radiocarbon dating using a low altitude European tree-ring calibration

Pearson, G. W.; Pilcher, J. R.; Baillie, M. G. L.; Hillam, Jennifer

doi:10.1038/270025a0

Cited by 46 publications

(27 citation statements)

References 17 publications

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“…While the first two alternatives are certainly plausible, the independent analysis by Pearson et al (1977), based on much more accurate observations, supports the third hypothesis. However, even if we have over-smoothed the data and failed to detect genuine kinks in F, our simulation experiments indicate that our modified prediction intervals and confidence intervals compensate reasonably well on average for such oversmoothing.…”

Section: Application To Radiocarbon Datasupporting

confidence: 55%

“…The first is simply that we have over-smoothed the data, and as in 35 of the 50 samples simulated under Model 1B, we have failed to detect genuine kinks in F. The second possibility is that D(3) is too large, due to sampling fluctuations in the various terms in equation (25). Thirdly, it is possible that F is linear, as claimed by Pearson et al (1977), and that the apparent bias arises not from our estimate Pft I 73) but from gross systematic errors in some of the original observations.…”

Section: Application To Radiocarbon Datamentioning

confidence: 94%

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Calibration, Cross-Validation and Carbon-14. II

Clark¹

1980

Journal of the Royal Statistical Society. Series A (General)

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Section: Application To Radiocarbon Datasupporting

confidence: 55%

Section: Application To Radiocarbon Datamentioning

confidence: 94%

Calibration, Cross-Validation and Carbon-14. II

Clark¹

1980

Journal of the Royal Statistical Society. Series A (General)

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“…Many of the papers published since 1978 describe the offset of their chronology compared to that of Suess (1978); in other cases, an offset can be calculated based on the measurements provided. Figure 5A uses measurements made by us and data listed in Pearson et al (1977), Suess (1978), Stuiver (1982), Linick, Suess and Becker (1985), and Stuiver and Becker (1993) (1993) German oak data reflects the extension of the Stuiver and Becker (1986) from ca. 2500 to 6000 BC.…”

Section: Bristlecone Pine and Irish Oak Measurementsmentioning

confidence: 99%

Location-Dependent Differences in the ¹⁴C Content of Wood

et al. 1995

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ABSTRACT. The long 14C chronologies currently used as calibration curves combine results from wood that grew in the western United States, the British Isles and Germany. Although these results show few significant differences in the 14t content of contemporaneous wood when averaged over the length of the chronology (i.e., the means of overlapping sections of chronology are the same), closer examination shows considerable variability. Separating the sections of chronology according to the provenance of the wood used for calibration reveals patterns that suggest small but finite differences in the i4C content of wood from different locations. We conclude that there is some evidence that German and American wood give dates older by between 20 and 40 yr from those of Irish oak for some periods. Additionally we suggest that the shift of the Belfast 1986 calibration data by ca. 18 yr toward older dates may not be valid and that the resultant offset between the Belfast 1986 and Seattle 1993 data shows a small but real difference in the 14C content of contemporaneous American, German and Irish wood.Intralaboratory measurements made in Belfast on contemporaneous German and Irish oak, and bristlecone pine and Irish oak, give offsets of 39 and 41 yr, respectively, with the Irish oak dating younger. Previous studies, in which sample pairs of American and English and French wood were processed in the same laboratory, also showed American wood to be slightly depleted in 14C. None of the findings of this study would significantly alter calibrated "C dates.

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“…The method used for the C measurement of the samples presented in this paper was described in Pearson et al (1977;Pearson 1979;1980). The system has been operative for measuring "calibration samples" since 1975. Quality controls were kept since the method was established involving the continuous monitoring of some 12 counting parameters additional to the measurement of samples, oxalic acid reference standard, and background.…”

Section: C Measurementmentioning

confidence: 99%

“…All samples including those previously published (Pearson et al, 1977;Pearson, 1980) were recalculated using the most accurate information presently available before being incorporated in this series of measurements.…”

Section: C Measurementmentioning

confidence: 99%

High-Precision ¹⁴C Measurement of Irish Oaks to Show the Natural Atmospheric ¹⁴C Variations of the AD Time Period

Pearson¹,

Baillie²

1983

Radiocarbon

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The high-precision 14C measurement of bi-decade and decade samples of Irish Oak for the time period AD 50 to 1830 is presented. The samples were taken from dendrochronologically dated Irish Oak providing an absolute chronology for this period. While the natural atmospheric 14C concentration shows cyclic deviations from a constant value, the amplitudes of such deviations vary considerably. Repeated measurement and interlaboratory checks justify a claim to accuracy in the data given. Comparison of a large number of data sets between Belfast and Seattle show that the different techniques of scintillation counting of 14C6H6 and gas counting of 14CO2 derived from different wood species grown in different continents give no significant bias. Thus, it is justifiable to use this data set as a high-precision calibration curve for the AD period. Over most of this period bi-decade samples were measured giving a slightly reduced resolution of short-term variation when compared to the measurement of decade intervals; however, any difference is not apparent when such curves are compared. It is of much greater importance that a comparison of data sets is without bias if a combined calibration curve is to have sufficient integrity for general use. Averaging the data from Belfast and Seattle would improve the validity of such an AD 14C calibration curve since it would tend to smooth out slight local variations and become internationally more acceptable.

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Absolute radiocarbon dating using a low altitude European tree-ring calibration

Cited by 46 publications

References 17 publications

Calibration, Cross-Validation and Carbon-14. II

Calibration, Cross-Validation and Carbon-14. II

Location-Dependent Differences in the ¹⁴C Content of Wood

High-Precision ¹⁴C Measurement of Irish Oaks to Show the Natural Atmospheric ¹⁴C Variations of the AD Time Period

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Absolute radiocarbon dating using a low altitude European tree-ring calibration

Cited by 46 publications

References 17 publications

Calibration, Cross-Validation and Carbon-14. II

Calibration, Cross-Validation and Carbon-14. II

Location-Dependent Differences in the 14C Content of Wood

High-Precision 14C Measurement of Irish Oaks to Show the Natural Atmospheric 14C Variations of the AD Time Period

Contact Info

Product

Resources

About

Location-Dependent Differences in the ¹⁴C Content of Wood

High-Precision ¹⁴C Measurement of Irish Oaks to Show the Natural Atmospheric ¹⁴C Variations of the AD Time Period