CLIMATIC OSCILLATIONS DURING MIS 3-2 RECORDED IN SETS OF 14C AND OSL DATES-A STUDY BASED ON DATA FROM POLAND

Terrestrial environments tend to be characterized by an incomplete record of past conditions. For the MIS 3-2 periods, there is only one known site in Poland-Horoszki Duze-in which a probably continuous record of climate change has been preserved. However, this site does not have any high precision multi-proxy analyses. In the absence of continuous high-resolution records, we decided to gather and analyze scattered information. We assembled data originating from various sites in Poland and checked whether the available results of C-14 and luminescence dating presented in the form of probability density distributions (PDF) and kernel density estimation (KDE) models would allow their reinterpretation. The data were compared to the Greenland isotope curve to see whether they were consistent with the hypothesis that the number of warming-cooling cycles recorded in the examined sediments was of the same order as in those ice-core records. Previously in Poland, usually only two interstadial periods (i.e., Hengelo and Denekamp, 36-38.6 and 28-32 C-14 kBP, respectively) have been identified in the discussed period. The joint analysis of data from a larger area revealed more warming-cooling events than recorded from individual sites.

Automated summary

Terrestrial environments often have incomplete records of past conditions. A site in Poland called Horoszki Duze is the only known location with continuous climate change records. In the absence of high-resolution records, researchers gathered scattered information from various sites in Poland and compared it to the Greenland isotope curve. This analysis revealed more warming-cooling events than previously recorded from individual sites.