Prof Christopher Ramsey: Publications

Links of Noltland, Westray, Orkney: Radiocarbon Dating and Chronological Modelling

Historic England 2016:38 (2016)

Authors:

Peter Marshall, David Clarke, Alison Sheridan, Christopher Ramsey, Et al.

Changes in El Niño – Southern Oscillation (ENSO) conditions during the Greenland Stadial 1 (GS-1) chronozone revealed by New Zealand tree-rings

Quaternary Science Reviews Elsevier BV 153 (2016) 139-155

Authors:

Jonathan G Palmer, Chris SM Turney, Edward R Cook, Pavla Fenwick, Zoë Thomas, Gerhard Helle, Richard Jones, Amy Clement, Alan Hogg, John Southon, Christopher Bronk Ramsey, Richard Staff, Raimund Muscheler, Thierry Corrège, Quan Hua

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Decadally Resolved Lateglacial Radiocarbon Evidence from New Zealand Kauri–CORRIGENDUM

Radiocarbon Cambridge University Press (CUP) 58:4 (2016) 947-947

Authors:

Alan Hogg, John Southon, Chris Turney, Jonathan Palmer, Christopher Bronk Ramsey, Pavla Fenwick, Gretel Boswijk, Ulf Buntgen, Michael Friedrich, Gerhard Helle, Konrad Hughen, Richard Jones, Bernd Kromer, Amexandra Noronha, Frederick Reinig, Linda Reynard, Richard Staff, Luckas Wacker

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Decadally Resolved Lateglacial Radiocarbon Evidence from New Zealand Kauri

Radiocarbon Cambridge University Press (CUP) 58:4 (2016) 709-733

Authors:

Alan Hogg, John Southon, Chris Turney, Jonathan Palmer, Christopher Bronk Ramsey, Pavla Fenwick, Gretel Boswijk, Ulf Büntgen, Michael Friedrich, Gerhard Helle, Konrad Hughen, Richard Jones, Bernd Kromer, Alexandra Noronha, Frederick Reinig, Linda Reynard, Richard Staff, Lukas Wacker

Abstract:

AbstractThe Last Glacial–Interglacial Transition (LGIT; 15,000–11,000 cal BP) was characterized by complex spatiotemporal patterns of climate change, with numerous studies requiring accurate chronological control to decipher leads from lags in global paleoclimatic, paleoenvironmental, and archaeological records. However, close scrutiny of the few available tree-ring chronologies and radiocarbon-dated sequences composing the IntCal13 14C calibration curve indicates significant weakness in 14C calibration across key periods of the LGIT. Here, we present a decadally resolved atmospheric 14C record derived from New Zealand kauri spanning the Lateglacial from ~13,100–11,365 cal BP. Two floating kauri 14C time series, curve-matched to IntCal13, serve as a 14C backbone through the Younger Dryas. The floating Northern Hemisphere (NH) 14C data sets derived from the YD-B and Central European Lateglacial Master tree-ring series are matched against the new kauri data, forming a robust NH 14C time series to ~14,200 cal BP. Our results show that IntCal13 is questionable from ~12,200–11,900 cal BP and the ~10,400 BP 14C plateau is approximately 5 decades too short. The new kauri record and repositioned NH pine 14C series offer a refinement of the international 14C calibration curves IntCal13 and SHCal13, providing increased confidence in the correlation of global paleorecords.

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Radiocarbon Verification of the Earliest Astro-Chronological Datum

Radiocarbon Cambridge University Press (CUP) 58:4 (2016) 735-739

Authors:

Ezra S Marcus, Michael W Dee, Christopher Bronk Ramsey, Thomas FG Higham, Andrew J Shortland

Abstract:

AbstractPapyri 10012A and 10012B from Illahun, Egypt, provide the earliest astro-chronological datum in history and, while calculated to various years in the 19th century BCE, have never been independently verified. As this datum enables the Middle Kingdom (MK) section of Egyptian historical chronology to be anchored in absolute time, it establishes the principal calendrical timeline for the eastern Mediterranean Bronze Age in the first half of the 2nd millennium BCE. AMS radiocarbon measurements of Papyrus 10012B establish its date range to 1886–1750 BCE, confirming the astronomical calculations and the essential reliability of Egyptian historical chronology for this period. Furthermore, all three leading estimates for the calendar year attribution of the document are supported by this analysis, with the role of a possible growing season effect determining which is most favored.

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Prof Christopher Ramsey

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Sub department

Links of Noltland, Westray, Orkney: Radiocarbon Dating and Chronological Modelling

Authors:

Changes in El Niño – Southern Oscillation (ENSO) conditions during the Greenland Stadial 1 (GS-1) chronozone revealed by New Zealand tree-rings

Authors:

Decadally Resolved Lateglacial Radiocarbon Evidence from New Zealand Kauri–CORRIGENDUM

Authors:

Decadally Resolved Lateglacial Radiocarbon Evidence from New Zealand Kauri

Authors:

Abstract:

Radiocarbon Verification of the Earliest Astro-Chronological Datum

Authors:

Abstract:

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