Dealing outliers offsets radiocarbon dating

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AD 402–614 12/-14 (within 95.4% probability limits).This is in good agreement with both historical evidence and a tentative dendrochronological placement proposed by Pearson et al. The C wiggle-match supports the relevance of this 213-year chronology as a key building block towards a longer 1st millennium AD Aegean-region oak tree-ring chronology.dendro or the other sixteen C data would prefer a more recent fit.

We see that the more recent the placement of the radiocarbon-dated decades from YMK-359 within the possible dendro-range, then the better the fit, since — given no other constraints (e.g.This suggests that the best estimate placement of the YMK-359 data is correct. The solution which best accommodates all the data and reaches a reasonable outcome is with the most recent dendrochronologically possible placement of the midpoint of the last dated decade of YMK-359 at RY205.5."Figure 7.Quality and placement of the best fit for the 22-date wiggle-match and chronology including the dates from YMK-359 according to the Relative Ring (RY) placements of the YMK-359 samples expressed in terms of the mid-point of the last dated decadal sample from YMK-359 against Int Cal09.A 213-year oak tree-ring chronology has been constructed from timbers from several sites from first-millennium AD Constantinople, in particular, from the study of over 2000 samples from harbour installations at Yenikapı (Figure 1), Istanbul (Pekin & Kangal 2007) (Figure 2). View of a small part of the Yenikapı excavation taken in July 2009 (looking to the SE) showing one of the wooden harbour installations from which samples were taken (Mürvet's Dock, informally named after the supervisor pending official nomenclature). Samples are grouped according to specific structures. RY = relative years (tree-ring) in terms of the floating 213-year chronology.A tentative dendrochronological placement of the 213-year sequence against other tree-ring series suggests an absolute date range of AD 398–610 for the time-series (Pearson et al. We report a radiocarbon dating project to provide an independent near-absolute chronological placement for this important chronology. Sample YMT-263, which is employed in this study, came from this dock. Samples placed at the tentative dendro-date (figure modified from Pearson et al. The Ox Cal D_Sequence analysis employed the mid-point of each set of dated tree-rings.

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