Prof Christopher Ramsey: Publications

Modeling the Age of the Cape Riva (Y-2) Tephra

Radiocarbon Cambridge University Press (CUP) 55:2 (2013) 741-747

Authors:

Sharen Lee, Christopher Bronk Ramsey, Mark Hardiman

Abstract:

Tephra from the Cape Riva (Y-2) eruption of Santorini has been found across the eastern Mediterranean. It presents an important link between marine and terrestrial records. A Poisson process (P Sequence) age-depth prior, with model averaging, is used to model individual previously published radiocarbon sequences, cross-linked with an exponential phase model parameter to obtain a robust age. Multiple sequences and 14C determinations from 3 eastern Mediterranean data sets (Seymour et al. 2004; Margari et al. 2009; Müller et al. 2011; Roeser et al. 2012) are used in the model. The modeled age of the Y-2 tephra produced within this study is 22,329–21,088 cal BP at 95.4% probability.

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Radiocarbon calibration in the Mid to Later 14th Century BC and radiocarbon dating Tell el-Amarna, Egypt

Chapter in Radiocarbon and the Chronologies of Ancient Egypt, Oxbox Books, Oxford (2013) 121-145

Authors:

SW Manning, B Kromer, MW Dee, TFG Higham, C Bronk Ramsey

Radiocarbon dates from samples funded by English Heritage between 1988 and 1993

English Heritage, 2013

Authors:

A Bayliss, C Bronk Ramsey, G Cook, G McCormac, R Otlet, J Walker

Recent and Planned Developments of the Program OxCal

Radiocarbon Cambridge University Press (CUP) 55:2 (2013) 720-730

Authors:

Christopher Bronk Ramsey, Sharen Lee

Abstract:

OxCal is a widely used software package for the calibration of radiocarbon dates and the statistical analysis of 14C and other chronological information. The program aims to make statistical methods easily available to researchers and students working in a range of different disciplines. This paper will look at the recent and planned developments of the package. The recent additions to the statistical methods are primarily aimed at providing more robust models, in particular through model averaging for deposition models and through different multiphase models. The paper will look at how these new models have been implemented and explore the implications for researchers who might benefit from their use. In addition, a new approach to the evaluation of marine reservoir offsets will be presented. As the quantity and complexity of chronological data increase, it is also important to have efficient methods for the visualization of such extensive data sets and methods for the presentation of spatial and geographical data embedded within planned future versions of OxCal will also be discussed.

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Selection and Treatment of Data for Radiocarbon Calibration: An Update to the International Calibration (IntCal) Criteria

Radiocarbon Cambridge University Press (CUP) 55:4 (2013) 1923-1945

Authors:

Paula J Reimer, Edouard Bard, Alex Bayliss, J Warren Beck, Paul G Blackwell, Christopher Bronk Ramsey, David M Brown, Caitlin E Buck, R Lawrence Edwards, Michael Friedrich, Pieter M Grootes, Thomas P Guilderson, Haflidi Haflidason, Irka Hajdas, Christine Hatté, Timothy J Heaton, Alan G Hogg, Konrad A Hughen, K Felix Kaiser, Bernd Kromer, Sturt W Manning, Ron W Reimer, David A Richards, E Marian Scott, John R Southon, Christian SM Turney, Johannes van der Plicht

Abstract:

High-quality data from appropriate archives are needed for the continuing improvement of radiocarbon calibration curves. We discuss here the basic assumptions behind 14C dating that necessitate calibration and the relative strengths and weaknesses of archives from which calibration data are obtained. We also highlight the procedures, problems, and uncertainties involved in determining atmospheric and surface ocean 14C/12C in these archives, including a discussion of the various methods used to derive an independent absolute timescale and uncertainty. The types of data required for the current IntCal database and calibration curve model are tabulated with examples.

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Prof Christopher Ramsey

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Modeling the Age of the Cape Riva (Y-2) Tephra

Authors:

Abstract:

Radiocarbon calibration in the Mid to Later 14th Century BC and radiocarbon dating Tell el-Amarna, Egypt

Authors:

Radiocarbon dates from samples funded by English Heritage between 1988 and 1993

Authors:

Recent and Planned Developments of the Program OxCal

Authors:

Abstract:

Selection and Treatment of Data for Radiocarbon Calibration: An Update to the International Calibration (IntCal) Criteria

Authors:

Abstract:

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