THE INTCAL20 NORTHERN HEMISPHERE RADIOCARBON AGE CALIBRATION CURVE (0–55 CAL kBP).

Reimer, Paula J , Austin, William E N, Bard, Edouard, Bayliss, Alex , Blackwell, Paul G, Bronk Ramsey, Christopher , Butzin, Martin , Cheng, Hai, Edwards, R Lawrence, Friedrich, Michael, Grootes, Pieter M, Guilderson, Thomas P, Hajdas, Irka , Heaton, Timothy J , Hogg, Alan G , Hughen, Konrad A , Kromer, Bernd, Manning, Sturt W , Muscheler, Raimund , Palmer, Jonathan G , Pearson, Charlotte , van der Plicht, Johannes, Reimer, Ron W, Richards, David A, Scott, E Marian , Southon, John R, Turney, Christian S M , Wacker, Lukas , Adolphi, Florian , Büntgen, Ulf, Capano, Manuela , Fahrni, Simon M, Fogtmann-Schulz, Alexandra, Friedrich, Ronny, Köhler, Peter , Kudsk, Sabrina, Miyake, Fusa, Olsen, Jesper, Reinig, Frederick, Sakamoto, Minoru, Sookdeo, Adam and Talamo, Sahra (2020) THE INTCAL20 NORTHERN HEMISPHERE RADIOCARBON AGE CALIBRATION CURVE (0–55 CAL kBP). Open Access Radiocarbon, 62 (4). pp. 725-757. DOI 10.1017/RDC.2020.41.

[img]
Preview
Text
intcal20_northern_hemisphere_radiocarbon_age_calibration_curve_055_cal_kbp.pdf - Published Version
Available under License Creative Commons: Attribution 4.0.

Download (1365Kb) | Preview
[img] Archive
S0033822220000417sup001.zip - Supplemental Material
Available under License Creative Commons: Attribution 4.0.

Download (1872Kb)

Supplementary data:

Abstract

Radiocarbon (14C) ages cannot provide absolutely dated chronologies for archaeological or paleoenvironmental studies directly but must be converted to calendar age equivalents using a calibration curve compensating for fluctuations in atmospheric 14C concentration. Although calibration curves are constructed from independently dated archives, they invariably require revision as new data become available and our understanding of the Earth system improves. In this volume the international 14C calibration curves for both the Northern and Southern Hemispheres, as well as for the ocean surface layer, have been updated to include a wealth of new data and extended to 55,000 cal BP. Based on tree rings, IntCal20 now extends as a fully atmospheric record to ca. 13,900 cal BP. For the older part of the timescale, IntCal20 comprises statistically integrated evidence from floating tree-ring chronologies, lacustrine and marine sediments, speleothems, and corals. We utilized improved evaluation of the timescales and location variable 14C offsets from the atmosphere (reservoir age, dead carbon fraction) for each dataset. New statistical methods have refined the structure of the calibration curves while maintaining a robust treatment of uncertainties in the 14C ages, the calendar ages and other corrections. The inclusion of modeled marine reservoir ages derived from a three-dimensional ocean circulation model has allowed us to apply more appropriate reservoir corrections to the marine 14C data rather than the previous use of constant regional offsets from the atmosphere. Here we provide an overview of the new and revised datasets and the associated methods used for the construction of the IntCal20 curve and explore potential regional offsets for tree-ring data. We discuss the main differences with respect to the previous calibration curve, IntCal13, and some of the implications for archaeology and geosciences ranging from the recent past to the time of the extinction of the Neanderthals.

Document Type: Article
Keywords: calibration curve; radiocarbon; IntCal20
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1017/RDC.2020.41
ISSN: 0033-8222
Projects: PalMod
Date Deposited: 17 Sep 2020 06:32
Last Modified: 09 Oct 2020 07:55
URI: http://oceanrep.geomar.de/id/eprint/50508

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...