Is there any Evidence for Regional Atmospheric 14C Offsets in the Southern Hemisphere?
| Autor: | Alan G. Hogg, Jonathan G. Palmer, Edward R. Cook, Brendan M. Buckley, Chris S. M. Turney |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
010506 paleontology
Archeology 060102 archaeology biology 06 humanities and the arts biology.organism_classification 01 natural sciences Archaeology law.invention Lagarostrobos Geography law General Earth and Planetary Sciences 0601 history and archaeology Radiocarbon dating Physical geography Southern Hemisphere Agathis australis 0105 earth and related environmental sciences |
| Zdroj: | Radiocarbon. 55:2029-2034 |
| ISSN: | 1945-5755 0033-8222 |
| DOI: | 10.2458/azu_js_rc.v55i2.16104 |
| Popis: | Center for Accelerator Mass Spectrometry (CAMS) Tasmanian Huon pine (Lagarostrobos franklinii) decadal measurements for the interval AD 745–855 suggest a mean interhemispheric radiocarbon offset (20 ± 5 yr), which is considerably lower than the previously reported mean interhemispheric offset for the last 2 millennia (44 ± 17 yr). However, comparable University of Waikato (Wk) New Zealand kauri (Agathis australis) measurements show significantly higher values (56 ± 6 yr), suggesting the possibility of a temporary geographic (intrahemispheric) offset between Tasmania, Australia, and Northland, New Zealand, during at least 1 common time interval. Here, we report 9 new Wk Tasmanian Huon pine measurements from the decades showing the largest Huon/kauri difference. We show statistically indistinguishable Wk Huon and Wk kauri 14C ages, thus dispelling the suggestion of a 14C geographic offset between Tasmania and Northland. |
| Databáze: | OpenAIRE |
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