Title: Exploration of age offset between radiocarbon dating and dendrochronology
Abstract:Radiocarbon dating requires calibration by an independent dating technique. An ideal method used to calibrate radiocarbon results is dendrochronology, because tree-rings are almost perfect archives of...Radiocarbon dating requires calibration by an independent dating technique. An ideal method used to calibrate radiocarbon results is dendrochronology, because tree-rings are almost perfect archives of the atmospheric radiocarbon level and dendrodating can be very accurate. However, an age offset between the calibrated 14C and dendrochronologically-dated ages has been observed for certain pine-tree samples studied at Lund University. It was observed that the 14C ages of the samples are older than their ages determined dendrochronologically. The aim of this master thesis was to investigate the apparent age offset between the two methods and study the processes that could lead to the age offset. To probe the age offset, trees recovered from the peat bog Hallarydsmossen, Southern Sweden, were dendrochronologically dated via a German bog-pine chronology. The 14C ages of the samples were measured using the accelerator mass spectrometry (AMS) technique. The samples for AMS measurement were prepared by using the cellulose extraction method. The results do not suggest any systematic age offset between radiocarbon dating and dendrochronology, as observed previously. However, the study verifies the reliability of the radiocarbon dating calibration by dendrochronology.Read More
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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Title: $Exploration of age offset between radiocarbon dating and dendrochronology
Abstract: Radiocarbon dating requires calibration by an independent dating technique. An ideal method used to calibrate radiocarbon results is dendrochronology, because tree-rings are almost perfect archives of the atmospheric radiocarbon level and dendrodating can be very accurate. However, an age offset between the calibrated 14C and dendrochronologically-dated ages has been observed for certain pine-tree samples studied at Lund University. It was observed that the 14C ages of the samples are older than their ages determined dendrochronologically. The aim of this master thesis was to investigate the apparent age offset between the two methods and study the processes that could lead to the age offset. To probe the age offset, trees recovered from the peat bog Hallarydsmossen, Southern Sweden, were dendrochronologically dated via a German bog-pine chronology. The 14C ages of the samples were measured using the accelerator mass spectrometry (AMS) technique. The samples for AMS measurement were prepared by using the cellulose extraction method. The results do not suggest any systematic age offset between radiocarbon dating and dendrochronology, as observed previously. However, the study verifies the reliability of the radiocarbon dating calibration by dendrochronology.