Abstract

Paleoceanographic studies often report instrumental precision and sometimes proxy calibration uncertainty. However, the age model uncertainty of marine sediment cores is often difficult to quantify except for radiocarbon-dated records of the last 50 kiloyears. Here we present an approach to quantifying the uncertainty of relative ages estimated by benthic δ18O alignment and how this uncertainty can be incorporated into the analysis of paleo proxy time series or model-data comparison. Specifically, when comparing climate responses recorded at two or more core sites, interpretations may be affected by uncertainty in the records' relative ages. We developed probabilistic benthic δ18O alignment software that estimates confidence intervals for cores' relative ages and generates 1000 sample ages suitable for Monte Carlo-style statistical analysis [Lin et al, 2014]. We find that the temporal resolution of the benthic …

Date

2016

Authors

Lorraine E Lisiecki, Seonmin Ahn, Geoffrey Gebbie, Alan M Jones, Deborah Khider, Charles Lawrence

Journal

AGU Fall Meeting Abstracts

Volume

2016

Pages

PP33D-04