Construction of the calendar timescale for Lake Wigry (NE Poland) sediments on the basis of radiocarbon dating

A radiocarbon chronology of lake sediments deposited in Lake Wigry during the Last Glacial and Holocene periods provided the basis for calendar age-depth modeling. Various fractions (organics and carbonates) were dated and the results were subjected to critical analysis. The dates affected by reservoir effects as well as outlying data were excluded, and the non-linear age model was developed based on 13 ages. The statistical tools used for construction of the models include the Bayesian analysis, applied for calibration of ¹⁴C dates with regard to stratigraphical position of the samples, and generalized additive models (GAM).