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| Titel |
A 150 year record of annual Bristlecone Pine 14C from the second millennium BC |
| VerfasserIn |
Charlotte Pearson, Matthew Salzer, Peter Brewer, Gregory Hodgins, A. J. Timothy Jull, Todd Lange, Richard Cruz, David Brown, Gretel Boswijk |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250146665
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| Publikation (Nr.) |
 EGU/EGU2017-10702.pdf |
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| Zusammenfassung |
| The Interdisciplinary Chronology of Civilizations Project (ICCP) at the University of Arizona
(UA) aims to resolve longstanding chronological issues for Aegean and Near Eastern
archaeology. A central component of this work is the production of annual resolution
sequences of 14C from securely anchored tree-ring chronologies. Contemporary growth rings
from Northern and Southern Hemisphere locations will be tested against a dataset of
consecutive annual resolution 14C measurements from tree-rings of securely dated North
American bristlecone pine (Pinus longaeva D.K. Bailey). These data will be used in a number
of ways: to investigate potential issues with the current IntCal dataset due to interpolation,
smoothing, or the inclusion of annual scale rapid changes in 14C; to identify 14C off-sets;
to evaluate whether annual determinations of 14C present sufficient advantages
for dating to justify the substantial costs involved in creating an annual resolution
calibration curve; to explore whether the degree of reproducibility between species
and growth locations justifies the construction of regional curves or allows us to
pioneer ‘annual resolution wigglematching’ to anchor substantial floating tree-ring
chronologies from Mediterranean archaeological contexts, and; if new rapid changes in 14C
(aka ‘spikes’) are discovered, to use these to achieve this same goal. The initial
focus of the project is the first and second millennium BC. From this period we
present 150 annual 14C determinations from bristlecone pine and explore preliminary
findings based on comparisons with the existing IntCal dataset, decadal data from the
Mediterranean, and some contemporary years from Irish Oak (Quercus spp.) and New
Zealand Kauri (Agathis australis (D. Don) Lindl.). This work, in combination with
results from another UA project team (see abstract by Jull et al.) helps confirm the
potential of the bristlecone pine archive for high resolution radiocarbon research. |
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