Calibration of the Radiocarbon Time Scale for the Southern Hemisphere: Ad 1850–950

Calibration of the Radiocarbon Time Scale for the Southern Hemisphere: Ad 1850–950
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南半球放射性碳时标的校准:公元 1850-950 年

DOI:
10.1017/s0033822200032094
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发表时间:
2002
期刊:
影响因子:
8.3
通讯作者:
M. Stuiver
M. Stuiver
中科院分区:
地球科学4区
文献类型:
--
作者:
F. McCormac;Paula J Reimer;A. G. Hogg;T. Higham;M. Baillie;J. G. Palmer;M. Stuiver

文献摘要

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我们对来自两个半球的树木年代学年代测定木材的十年样本进行了一系列放射性碳测量,跨度为1000年(McCormac等,1998年; Hogg等,本期)。使用Hogg等人提供的数据,我们发现,在公元950-1850年期间,两半球之间的14 C偏移不是恒定的,而是周期性变化的(约130年的周期),振幅在1%和10%之间变化(即8-80年),从而对南半球物质的14 C校准产生影响。在公元1245年和1355年之间,偏移量大幅增加。在本文中,我们提出了一个南半球的高精度校准数据集(SHCal 02),其中包括来自新西兰,智利和南非的测量。本文提出用该资料和41 ± 14年的新值来校正IntCal 98资料中超出此范围的时间段,以校准南半球14 C测年。
We have conducted a series of radiocarbon measurements on decadal samples of dendrochronologically dated wood from both hemispheres, spanning 1000 years (McCormac et al. 1998; Hogg et al. this issue). Using the data presented in Hogg et al., we show that during the period AD 950–1850 the 14C offset between the hemispheres is not constant, but varies periodically (∼130 yr periodicity) with amplitudes varying between 1 and 10% (i.e. 8–80 yr), with a consequent effect on the 14C calibration of material from the Southern Hemisphere. A large increase in the offset occurs between AD 1245 and 1355. In this paper, we present a Southern Hemisphere high-precision calibration data set (SHCal02) that comprises measurements from New Zealand, Chile, and South Africa. This data, and a new value of 41 ± 14 yr for correction of the IntCal98 data for the period outside the range given here, is proposed for use in calibrating Southern Hemisphere 14C dates.