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| Titel |
A comparison of the Greenland ice-core and IntCal timescales through the Laschamp geomagnetic excursion, utilising new 14C data from Tenaghi Philippon, Greece |
| VerfasserIn |
Richard Staff, Mark Hardiman, Christopher Bronk Ramsey, Vincent Hare, Andreas Koutsodendris, Jörg Pross |
| 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 |
250148646
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| Publikation (Nr.) |
 EGU/EGU2017-12921.pdf |
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| Zusammenfassung |
| 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 present 54 14C measurements from a terrestrial fen peat core extracted from the site of Tenaghi Philippon, NE Greece, contiguously spanning the time period between ~48,000 and 39,000 cal. BP. 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 exploit this common production signal, comparing Greenland 10Be with our Tenaghi Philippon 14C record, thereby providing a means to assess the concordance between the radiocarbon (IntCal) and Greenland ice-core (GICC05) timescales themselves for this, the oldest portion of the radiocarbon technique. |
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