DECADALLY RESOLVED LATEGLACIAL RADIOCARBON EVIDENCE FROM NEW ZEALAND KAURI
DECADALLY RESOLVED LATEGLACIAL RADIOCARBON EVIDENCE FROM NEW ZEALAND KAURI
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DOI：
10.1017/rdc.2016.86
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发表时间：
2016-12-01
期刊：
影响因子：
8.3
通讯作者：
Wacker, Lukas
中科院分区：
文献类型：
--
作者：
Hogg, Alan;Southon, John;Wacker, Lukas
末次冰期-间冰期转变（LGIT；15,000-11,000 cal BP）的特点是气候变化的复杂时空模式，大量研究需要精确的时间顺序控制来破译全球古气候、古环境和考古记录中滞后的线索。然而，对组成 IntCal13 C-14 校准曲线的少数可用树木年轮和放射性碳测年序列的仔细审查表明，LGIT 关键时期的 C-14 校准存在显着弱点。在这里，我们提出了来自新西兰贝壳杉的年代际解析大气 C-14 记录，该记录跨越晚冰期，距今约 13,100-11,365 cal BP。两个浮动贝壳杉 C-14 时间序列与 IntCal13 曲线匹配，作为穿过新仙女木期的 C-14 骨干网。来自 YD-B 和中欧晚冰期主树木年轮系列的浮动北半球 (NH) C-14 数据集与新的贝壳杉数据相匹配，形成了类似于 14,200 cal BP 的稳健的 NH C-14 时间序列。我们的结果表明，IntCal13 与 12,200-11,900 cal BP 相似是有问题的，而与 10,400 BP C-14 相似的平台期大约还短了 5 个十年。新的贝壳杉记录和重新定位的 NH 松 C-14 系列对国际 14C 校准曲线 IntCal13 和 SHCal13 进行了改进，增强了人们对全球古记录相关性的信心。
The Last Glacial-Interglacial Transition (LGIT; 15,000-11,000 cal BP) was characterized by complex spatiotemporal patterns of climate change, with numerous studies requiring accurate chronological control to decipher leads from lags in global paleoclimatic, paleoenvironmental, and archaeological records. However, close scrutiny of the few available tree-ring chronologies and radiocarbon-dated sequences composing the IntCal13 C-14 calibration curve indicates significant weakness in C-14 calibration across key periods of the LGIT. Here, we present a decadally resolved atmospheric C-14 record derived from New Zealand kauri spanning the Lateglacial from similar to 13,100-11,365 cal BP. Two floating kauri C-14 time series, curve-matched to IntCal13, serve as a C-14 backbone through the Younger Dryas. The floating Northern Hemisphere (NH) C-14 data sets derived from the YD-B and Central European Lateglacial Master tree-ring series are matched against the new kauri data, forming a robust NH C-14 time series to similar to 14,200 cal BP. Our results show that IntCal13 is questionable from similar to 12,200-11,900 cal BP and the similar to 10,400 BP C-14 plateau is approximately 5 decades too short. The new kauri record and repositioned NH pine C-14 series offer a refinement of the international 14C calibration curves IntCal13 and SHCal13, providing increased confidence in the correlation of global paleorecords.