New annual radiocarbon measurements based on oak from the Danish dendrochronology

Sabrina Gjødvad Kaiser Kudsk; Alexandra Fogtmann-Schulz; Bente Philippsen; Claudia Baittinger; Mads Faurschou Knudsen; Christoffer Karoff; Jesper Olsen

Abstract

Since the publication of the 775 AD cosmic-ray event in 2012 there has been an increased focus world-wide on producing annual high precision 14C measurements. At the Aarhus AMS Centre (AARAMS), a project has been initiated in close collaboration with astronomers and geoscientists to investigate the 11-year solar cycle during low solar activity periods in particular. So far, our focus has been on the Spörer (AD 1450 – 1550) and Oort (AD 1040 – 1080) grand solar minima. We have also, however, investigated the AD 775 and AD 994 cosmic-ray events; the latter at sub-annual resolution by 14C dating both early and late wood fractions from single years. Additionally, we have produced annual 14C data covering the periods from AD 650 – 750 and AD 800 – 900. The presented annual records are all made on the late-wood fraction from Danish oak trees only to ensure univocally a single year origin of the carbon. We will discuss the data in relation to published annual data as well as the existing data integrated in IntCal13. We believe that our datasets will provide a valuable contribution for updating the international calibration curve to annual resolution for the last 2000 years. Further, we will report on the laboratory procedures used at AARAMS for producing the annual 14C data.

Original language	English
Publication date	Jun 2018
Publication status	Published - Jun 2018
Event	The 23rd International Radiocarbon Conference - Trondheim, Norway Duration: 17 Jun 2018 → 22 Jun 2018 Conference number: 23

Conference

Conference	The 23rd International Radiocarbon Conference
Number	23
Location	Trondheim
Country/Territory	Norway
Period	17/06/2018 → 22/06/2018

Keywords

single year
radiocarbon
tree-rings
calibration curve
solar activity

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@conference{18fb67c41e9f461b80129835955c8143,

title = "New annual radiocarbon measurements based on oak from the Danish dendrochronology",

abstract = "Since the publication of the 775 AD cosmic-ray event in 2012 there has been an increased focus world-wide on producing annual high precision 14C measurements. At the Aarhus AMS Centre (AARAMS), a project has been initiated in close collaboration with astronomers and geoscientists to investigate the 11-year solar cycle during low solar activity periods in particular. So far, our focus has been on the Sp{\"o}rer (AD 1450 – 1550) and Oort (AD 1040 – 1080) grand solar minima. We have also, however, investigated the AD 775 and AD 994 cosmic-ray events; the latter at sub-annual resolution by 14C dating both early and late wood fractions from single years. Additionally, we have produced annual 14C data covering the periods from AD 650 – 750 and AD 800 – 900. The presented annual records are all made on the late-wood fraction from Danish oak trees only to ensure univocally a single year origin of the carbon. We will discuss the data in relation to published annual data as well as the existing data integrated in IntCal13. We believe that our datasets will provide a valuable contribution for updating the international calibration curve to annual resolution for the last 2000 years. Further, we will report on the laboratory procedures used at AARAMS for producing the annual 14C data.",

keywords = "single year, radiocarbon, tree-rings, calibration curve, solar activity",

author = "{Gj{\o}dvad Kaiser Kudsk}, Sabrina and Alexandra Fogtmann-Schulz and Bente Philippsen and Claudia Baittinger and Knudsen, {Mads Faurschou} and Christoffer Karoff and Jesper Olsen",

year = "2018",

month = jun,

language = "English",

note = "The 23rd International Radiocarbon Conference ; Conference date: 17-06-2018 Through 22-06-2018",

}

TY - ABST

T1 - New annual radiocarbon measurements based on oak from the Danish dendrochronology

AU - Gjødvad Kaiser Kudsk, Sabrina

AU - Fogtmann-Schulz, Alexandra

AU - Philippsen, Bente

AU - Baittinger, Claudia

AU - Knudsen, Mads Faurschou

AU - Karoff, Christoffer

AU - Olsen, Jesper

N1 - Conference code: 23

PY - 2018/6

Y1 - 2018/6

N2 - Since the publication of the 775 AD cosmic-ray event in 2012 there has been an increased focus world-wide on producing annual high precision 14C measurements. At the Aarhus AMS Centre (AARAMS), a project has been initiated in close collaboration with astronomers and geoscientists to investigate the 11-year solar cycle during low solar activity periods in particular. So far, our focus has been on the Spörer (AD 1450 – 1550) and Oort (AD 1040 – 1080) grand solar minima. We have also, however, investigated the AD 775 and AD 994 cosmic-ray events; the latter at sub-annual resolution by 14C dating both early and late wood fractions from single years. Additionally, we have produced annual 14C data covering the periods from AD 650 – 750 and AD 800 – 900. The presented annual records are all made on the late-wood fraction from Danish oak trees only to ensure univocally a single year origin of the carbon. We will discuss the data in relation to published annual data as well as the existing data integrated in IntCal13. We believe that our datasets will provide a valuable contribution for updating the international calibration curve to annual resolution for the last 2000 years. Further, we will report on the laboratory procedures used at AARAMS for producing the annual 14C data.

AB - Since the publication of the 775 AD cosmic-ray event in 2012 there has been an increased focus world-wide on producing annual high precision 14C measurements. At the Aarhus AMS Centre (AARAMS), a project has been initiated in close collaboration with astronomers and geoscientists to investigate the 11-year solar cycle during low solar activity periods in particular. So far, our focus has been on the Spörer (AD 1450 – 1550) and Oort (AD 1040 – 1080) grand solar minima. We have also, however, investigated the AD 775 and AD 994 cosmic-ray events; the latter at sub-annual resolution by 14C dating both early and late wood fractions from single years. Additionally, we have produced annual 14C data covering the periods from AD 650 – 750 and AD 800 – 900. The presented annual records are all made on the late-wood fraction from Danish oak trees only to ensure univocally a single year origin of the carbon. We will discuss the data in relation to published annual data as well as the existing data integrated in IntCal13. We believe that our datasets will provide a valuable contribution for updating the international calibration curve to annual resolution for the last 2000 years. Further, we will report on the laboratory procedures used at AARAMS for producing the annual 14C data.

KW - single year

KW - radiocarbon

KW - tree-rings

KW - calibration curve

KW - solar activity

M3 - Conference abstract for conference

T2 - The 23rd International Radiocarbon Conference

Y2 - 17 June 2018 through 22 June 2018