Radiocarbon calibration from the Lake Suigetsu varve sediment

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  • 炭素14年代キャリブレーションと水月湖年縞堆積物

Abstract

Radiocarbon (14C) provides a way to date material that contains carbon with an age up to 50,000 years and is also an important tracer of the global carbon cycle. To obtain the calendar year, radiocarbon age is calibrated using radiocarbon calibration dataset such as IntCal09. However there is still uncertainty in the available radiocarbon calibration dataset prior to 12.5 thousand years before the present. Recently，the radiocarbon calibration dataset from the annual laminated (varve) sediments of Lake Suigetsu, Japan (35°35'N, 135°53'E)， have been updated by more than 800 14C analyses of terrestrial materials which provide a comprehensive record of atmospheric (or terrestrial) radiocarbon to the present limit of the 14C method (Bronk Ramsey et al., 2013).

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