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Status: Bibliographieeintrag

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Verfasst von:Staff, Richard A. [VerfasserIn]   i
 Koutsodendris, Andreas [VerfasserIn]   i
 Pross, Jörg [VerfasserIn]   i
Titel:Reconciling the Greenland ice-core and radiocarbon timescales through the Laschamp geomagnetic excursion
Verf.angabe:Richard A. Staff, Mark Hardiman, Christopher Bronk Ramsey, Florian Adolphi, Vincent J. Hare, Andreas Koutsodendris, Jörg Pross
Jahr:2019
Umfang:9 S.
Fussnoten:Gesehen am 01.08.2019
Titel Quelle:Enthalten in: Earth and planetary science letters
Ort Quelle:Amsterdam [u.a.] : Elsevier, 1966
Jahr Quelle:2019
Band/Heft Quelle:520(2019), Seite 1-9
ISSN Quelle:1385-013X
Abstract:Cosmogenic radionuclides, such as 10Be and 14C, share a common production signal, with their formation in the Earth's upper atmosphere modulated by changes to the geomagnetic field, as well as variations in the intensity of the solar wind. Here, we use this common production signal to compare between the radiocarbon (IntCal) and Greenland ice-core (GICC05) timescales, utilising the most pronounced cosmogenic production peak of the last 100,000 years - that associated with the Laschamp geomagnetic excursion circa 41,000 years ago. We present 54 new 14C measurements from a peat core (‘TP-2005’) from Tenaghi Philippon, NE Greece, contiguously spanning between circa 47,300 and 39,600 cal. BP, demonstrating a distinctive tripartite structure in the build up to the principal Laschamp production maximum that is not present in the consensus IntCal13 calibration curve. This is the first time that a continuous, non-reservoir corrected 14C dataset has been generated over such a long time span for this, the oldest portion of the radiocarbon timescale. This period is critical for both palaeoenvironmental and archaeological applications, with the replacement of Neanderthals by anatomically modern humans in Europe around this time. By placing our Tenaghi Philippon 14C dataset on to the Hulu Cave U-series timescale of Cheng et al. (2018) via Bayesian statistical modelling, the comparison of TP-2005 14C with Greenland 10Be fluxes also implicitly relates the underlying U-series and GICC05 timescales themselves. This comparison suggests that whilst these two timescales are broadly coherent, the IntCal13 timescale contains erroneous structure circa 40,000 cal. BP.
DOI:doi:10.1016/j.epsl.2019.05.021
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag: https://doi.org/10.1016/j.epsl.2019.05.021
 Volltext: http://www.sciencedirect.com/science/article/pii/S0012821X19302912
 DOI: https://doi.org/10.1016/j.epsl.2019.05.021
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:beryllium-10 (Be)
 Campanian Ignimbrite (C.I.) tephra
 Laschamp geomagnetic excursion
 radiocarbon (C) dating
 relative paleointensity
 Tenaghi Philippon, Greece
K10plus-PPN:1670456781
Verknüpfungen:→ Zeitschrift

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