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
复制标题
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
中科院分区:
文献类型:
--
作者:
F. McCormac;Paula J Reimer;A. G. Hogg;T. Higham;M. Baillie;J. G. Palmer;M. Stuiver
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.