Bernd Kromer

Marine20—The Marine Radiocarbon Age Calibration Curve (0–55,000 cal BP)

ABSTRACT The concentration of radiocarbon ( 14 C) differs between ocean and atmosphere. Radiocarbon determinations from samples which obtained their 14 C in the marine environme...

IntCal09 and Marine09 Radiocarbon Age Calibration Curves, 0–50,000 Years cal BP

The IntCal04 and Marine04 radiocarbon calibration curves have been updated from 12 cal kBP (cal kBP is here defined as thousands of calibrated years before AD 1950), and extende...

The 12,460-Year Hohenheim Oak and Pine Tree-Ring Chronology from Central Europe—A Unique Annual Record for Radiocarbon Calibration and Paleoenvironment Reconstructions

The combined oak and pine tree-ring chronologies of Hohenheim University are the backbone of the Holocene radiocarbon calibration for central Europe. Here, we present the revise...

Tree rings and ice cores reveal 14C calibration uncertainties during the Younger Dryas

Atmospheric 14C variations derived from tree rings during the early Younger Dryas

Late Glacial ¹⁴C Ages from a Floating, 1382-Ring Pine Chronology

We built a floating, 1382-ring pine chronology covering the radiocarbon age interval of 12,000 to 10,650 BP. Based on the strong rise of Δ 14 C at the onset of the Younger Dryas...

Lateglacial environmental variability from Swiss tree rings

¹⁴C Calibration in the 2nd and 1st Millennia BC—Eastern Mediterranean Radiocarbon Comparison Project (EMRCP)

We have measured additional known-age German oak samples in 4 intervals in the 2nd and 1st millennia BC to add to (and to replicate) parts of the international Northern Hemisphe...

Climatic, Solar, Oceanic, and Geomagnetic Influences on Late-Glacial and Holocene Atmospheric ¹⁴C/¹²C Change

Abstract Late-glacial and Holocene 14 C/ 12 C ratios of atmospheric CO 2 vary in magnitude from a few per mil for annual/decadal pertubations to more than 10% for events lasting...

A stable-isotope tree-ring timescale of the Late Glacial/Holocene boundary

German Oak and Pine ¹⁴C Calibration, 7200–9439 BC

Radiocarbon calibration data derived from German oak chronologies, ranging back to 7200 BC, have been published in the previous Calibration Issue (Stuiver & Kra 1986). In re...

Radiocarbon Age Calibration Back to 13,300 Years BP and the¹⁴C Age Matching of the German Oak and US Bristlecone Pine Chronologies

With the recent establishment of an unbroken West European tree-ring sequence spanning the past 7272 years (Pilcher et al , 1984) the calibration of the 14 C time scale was adva...

Radiocarbon Calibration Data for the 6th to the 8th Millennia BC

14 C calibration curves derived from South German oak tree-ring series are presented. They cover the interval between 4400 and 7200 BC complementing existing data sets and exten...

The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP)

ABSTRACT Radiocarbon ( 14 C) ages cannot provide absolutely dated chronologies for archaeological or paleoenvironmental studies directly but must be converted to calendar age eq...