New prolonged paleoclimatic cycles registered in calcite flowstones from the Duhlata cave, Bulgaria

Studies of Quaternary climate change are particularly important for determining the extent and scale of the participation of natural and anthropogenic processes in global warming. For their research we applied measure- ments of paleoluminescent records and absolute dating of calcite flowstones from the Duhlata cave, Bosnek, Bulgaria. Using periodogram analysis of the obtained speleothem records, we established existence of new prolonged cycles of Quaternary climate change. Their intensity is comparable to that of the Milankovic cycles, which cause glaciations, so they have potential to produce similar impact on climate.