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Tree-ring width of Pinus sylvestris (von Linné) of subfossil tree sample HOH1425-131

Publication Date
DOI: 10.1594/pangaea.604944
  • Age
  • Dendrochronological Crossdating
  • 14C-Wiggle-Match
  • Hoh1425
  • Ring Width
  • Subfossil Tree
  • Treerings_Southgermany
  • Warendorf
  • Nordrhein-Westfalen
  • Western Germany
  • Biology
  • Ecology
  • Geography

Abstract RADIOCARBON, Vol 46, Nr 3, 2004, p 1203–1209 © 2004 by the Arizona Board of Regents on behalf of the University of Arizona 1203 LATE GLACIAL 14C AGES FROM A FLOATING, 1382-RING PINE CHRONOLOGY Bernd Kromer1,2 • Michael Friedrich3 • Konrad A Hughen4 • Felix Kaiser5 • Sabine Remmele1,3 • Matthias Schaub5 • Sahra Talamo1 ABSTRACT. 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 ∆14C at the onset of the Younger Dryas (YD) and wiggle-matching of the decadal-scale ∆14C fluc- tuations, we can anchor the floating chronology to the Cariaco varve chronology. We observe a marine reservoir correction higher than hitherto assumed for the Cariaco site, of up to 650 yr instead of 400 yr, for the full length of the comparison inter- val. The tree-ring ∆14C shows several strong fluctuations of short duration (a few decades) at 13,800; 13,600; and 13,350 cal BP. The amplitude of the strong ∆14C rise at the onset of the YD is about 40‰, whereas in the marine data set the signal appears stronger due to a re-adjustment of the marine mixed-layer ∆14C towards the atmospheric level. INTRODUCTION Beyond 11,855 cal BP, the current calibration data set IntCal98 (Stuiver et al. 1998a) is based on marine radiocarbon data from corals and marine varves representing the local 14C level of the ocean mixed layer. Depending on the rate of gas exchange between the atmosphere and ocean and the exchange with underlying oceanic thermocline and deep waters, the mixed layer will attain an inter- mediate 14C level between the end-members of deep ocean and atmosphere. The resulting, apparent 14C age difference between coexistent samples of the terrestrial and marine biosphere is commonly referred to as the marine reservoir age, and in order to create a terrestrial calibration data set from marine data, the reservoir age must be subtracted. For IntCal98, a constant reservoir correction of 500 yr has been applied prior to 1

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