Erlangen 2018 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 6: Accelerator Mass Spectrometry 2

MS 6.1: Hauptvortrag

Donnerstag, 8. März 2018, 10:30–11:00, R 1.020

High precision radiocarbon analysis of annual tree-ring samples — •Lukas Wacker, Stephanie Arnold, Silvia Bollhalder Lück, Marcus Christl, and Hans-Arno Synal — LIP, Otto-Stern- Weg 5, CH-8093 Zürich

Trees catalogued by dendrochronology are the most valuable source for radiocarbon calibration throughout the Holocene, as trees rings preserve atmospheric radiocarbon concentrations from the time they were formed. The longest continuous European tree ring chronology reaches back to 12 300 BP. However, the majority of the tree-ring based international radiocarbon calibration curve (IntCal13) is presently based on measurements with decadal resolution. We will show that highest precision radiocarbon analysis on annual tree-ring samples are now possible on a routine basis with compact AMS systems, which require less material than for previous measurements performed with decay counting. The newly acquired data will not only improve the next iteration of IntCal, but also carries new, high fidelity information about past solar activity and therefore will allow for synchronization with other not-so-well dated environmental archives.